Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Journal of Marine Science and Technology–Taiwan

Discipline
Keyword
Publication Year

Articles 1111 - 1140 of 1299

Full-Text Articles in Engineering

Modeling The Effective Elastic Modulus Of Rc Beams Exposed To Fire, Jui-Hsiang Hsu, Cherng-Shing Lin, Chang-Bin Huang Jun 2006

Modeling The Effective Elastic Modulus Of Rc Beams Exposed To Fire, Jui-Hsiang Hsu, Cherng-Shing Lin, Chang-Bin Huang

Journal of Marine Science and Technology–Taiwan

This work combines thermal and structural analyses to study the effect of fire on the elastic modulus of reinforced concrete beams. The thermal analysis uses the finite difference method to model the temperature distribution of a reinforced concrete beam maintained at high temperature. The structural analysis, using the lumped method, is utilized to calculate the effective elastic modulus of reinforced concrete beams. The results of the thermal analysis are compared to the experimental results in the literature, and the analytically derived structural results are also compared with experimental data on the flexural behaviors of RC beams exposed to fire. The …

Go to article

Reinforcing Effects And Mechanical Properties Of Rc Beam With Cfs Under Static And Running Loads, Ming-Chien Hsu, Tadashi Abe, Tetsukazu Kida, Toshiaki Sawano, Kazuhiko Minakuchi Jun 2006

Reinforcing Effects And Mechanical Properties Of Rc Beam With Cfs Under Static And Running Loads, Ming-Chien Hsu, Tadashi Abe, Tetsukazu Kida, Toshiaki Sawano, Kazuhiko Minakuchi

Journal of Marine Science and Technology–Taiwan

Through a series of experiments on RC beams reinforced with the carbon fiber sheet (CFS) under the static and running loads, the authors verified the effects of the aspect ratio (ratio of beam width to depth) and CFS reinforcement on the failure mechanism. The experiments revealed that: (1) CFS can effectively reinforce beams subjected to static loads in the flexural region, and increase the strength of beams subjected to running loads but such beams failed in shear, and (2) the tensile strength of CFS is greatly influenced by the aspect ratio. The authors evaluated how the aspect ratio influences the …

Go to article

Cargo Terminal Shift Setting And Manpower Supplying In Short-Term Operations, Shangyao Yan, Chung-Kai Chen, Chia-Hung Chen Jun 2006

Cargo Terminal Shift Setting And Manpower Supplying In Short-Term Operations, Shangyao Yan, Chung-Kai Chen, Chia-Hung Chen

Journal of Marine Science and Technology–Taiwan

In this research, we develop two short-term manpower supply models from air cargo terminal perspectives. The models are expected to be effective tools for air cargo terminals to plan their manpower supplies and shift schedules. We first incorporate two flexible management strategies and the related operating constraints into the development of a mathematical programming model. By suitably modifying the model, we then construct a strategic model, involving different combinations of manpower supply principles, which can help air cargo terminals manage more effectively their terminal manpower supplies. To evaluate the models in practice, we perform a case study using real operation …

Go to article

Development Of A Cost Effective Mini Autonomous Underwater Vehicle, Chiu-Feng Lin, Chyuan-Yow Tseng Jun 2006

Development Of A Cost Effective Mini Autonomous Underwater Vehicle, Chiu-Feng Lin, Chyuan-Yow Tseng

Journal of Marine Science and Technology–Taiwan

This paper describes the development of a cost effective mini autonomous underwater vehicle. The mini size of the vehicle is achieved by extracting the control module hardware out from the vehicle vessel and by reducing the on-board sensors. The control of the vehicle is conducted by a base station wirelessly telecommunicating with the vehicle. Furthermore, the reduction of the sensors also reduces the cost of the vehicle. For the purpose, in the vehicle, a single sensor featuring a CCD camera is mounted at the front of the vehicle. The images taken by this CCD camera are used both for obstacle …

Go to article

A Damping Constant Limitation Design Of Power System Stabilizer Using Hybrid Differential Evolution, Yung-Sung Chuang, Chi-Jui Wu Jun 2006

A Damping Constant Limitation Design Of Power System Stabilizer Using Hybrid Differential Evolution, Yung-Sung Chuang, Chi-Jui Wu

Journal of Marine Science and Technology–Taiwan

This paper is used to investigate a novel design of lead-lag type power system stabilizers for a multi-machine power system. In the design procedures, the minimum damping constants requirements of all of electromechanical modes can be designated and several typical operating conditions can be considered at the same time. The hybrid differential evolution (HDE) method is used to tune the parameters of power system stabilizers. In the design procedures, a region in the left half complex plane bounded by a line with a given negative real value is given. Thus, at the final step of the HDE, all of electromechanical …

Go to article

Performance Analysis Of Mc-Cdma Communication Systems Over Nakagami-M Environments, Joy Iong-Zong Chen Mar 2006

Performance Analysis Of Mc-Cdma Communication Systems Over Nakagami-M Environments, Joy Iong-Zong Chen

Journal of Marine Science and Technology–Taiwan

The performance for a MC-CDMA (multi-carrier coded-division multiple-access) system working in uncorrelated and correlated fading channels with Nakagami distribution is investigated in this paper. We adopt the BPSK modulation scheme with an alternative expression for Q-function to evaluate the BER (bit error rate) performance of the MC-CDMA system. The sum of Gamma variates is adopted for deriving a closed-form solution for arbitrarily correlated channel in order to avoid the difficulty of explicitly obtaining the pdf (probability density function) for the SNR (signal-to-noise ratio) at the MRC (maximum ratio combining) output. The results with simple expression obviously show that the BER …

Go to article

Bearing Capacity Of Foundations On Sand Using The Method Of Slip Line, Meen-Wah Gui, Muhunthan Mar 2006

Bearing Capacity Of Foundations On Sand Using The Method Of Slip Line, Meen-Wah Gui, Muhunthan

Journal of Marine Science and Technology–Taiwan

The accurate prediction of the bearing capacity of shallow foundations on granular soils has been complicated by their stress dependent strength behavior and the surface roughness of the foundationsoil interface. These are accounted for using empirical relations in the current state of practice. In this study, the stress dependent behavior of soils is accounted for using a strength dilatancy relationship. The method of slip line has been extended to incorporate this relationship and the effects of surface roughness to derive the depth dependent bearing capacity factor Nq. The results are presented in terms of angle of friction, depth/diameter ratio, and …

Go to article

Experimental Study On The Performance Of Ship Fire Protection Materials, Jen-Chieh Lee, Shi-Jie Liu Mar 2006

Experimental Study On The Performance Of Ship Fire Protection Materials, Jen-Chieh Lee, Shi-Jie Liu

Journal of Marine Science and Technology–Taiwan

The performance of heat insulation, sound absorption and insulation of ship fire protection materials is experimentally investigated in this paper. The fire protection materials of rock wool 60 k (60 kg/m3 ) and ceramic fiber 80k (80 kg/m3 ) are tested to show the requisite minimum thickness for the regulation of IMO heat insulation A class. The results show that the heat insulation performance of ceramic fiber (25 mm) and rock wool (50 mm) meets the requirement of A-30 class bulkhead. However, the composition of ceramic fiber (25 mm) and rock wool (25 mm) with the ceramic fiber exposed to …

Go to article

State Variance Constrained Fuzzy Control Via Observer-Based Fuzzy Controllers, Wen-Jer Chang, Balasingam Yeh, Yu-Teh Meng Mar 2006

State Variance Constrained Fuzzy Control Via Observer-Based Fuzzy Controllers, Wen-Jer Chang, Balasingam Yeh, Yu-Teh Meng

Journal of Marine Science and Technology–Taiwan

In this paper, a state variance constrained design method is developed to deal with the observer-based fuzzy control problem for continuous Takagi-Sugeno (T-S) fuzzy stochastic models. The stability problem considered in this paper is a standard feasibility problem with several Linear Matrix Inequalities (LMIs), which can be solved numerically using the interior-point method. The purpose of this paper aims at finding observer-based fuzzy controllers such that the closed-loop system is asymptotically stable and the state variance performance constraints are satisfied. Finally, a numerical example is included to demonstrate the effectiveness of the proposed controller design method.

Go to article

Laminar Film Condensation On A Horizontal Plate In A Porous Medium With Surface Tension Effects, Tong-Bou Chang Dec 2005

Laminar Film Condensation On A Horizontal Plate In A Porous Medium With Surface Tension Effects, Tong-Bou Chang

Journal of Marine Science and Technology–Taiwan

The problem of steady filmwise condensation on a finite-size horizontal plate embedded in a porous medium is studied for the case in which a cold plate faces upwards with a dry saturation vapor. Due to the effects of surface tension forces, there is a two-phase zone lying between the liquid film and the vapor zone. As in classical filmwise condensation problems, it is assumed that; (a) the inertia within the liquid film is negligible, and (b) the properties of porous medium, dry vapor, and condensate are constant. A dimensionless parameter Boc is introduced to characterize liquid flow due to surface …

Go to article

Application Of Fuzzy Soil Classification In Visualizing 3-D Soil Strata, Jing-Wen Chen Dec 2005

Application Of Fuzzy Soil Classification In Visualizing 3-D Soil Strata, Jing-Wen Chen

Journal of Marine Science and Technology–Taiwan

The distribution of soil classes is an important factor in engineering design. In order to generate the soil class map, fuzzy soil classifications were developed to provide the means to characterize and quantify the soil classes, and then the spatial distribution of soil class can be interpolated by geostatistical method. For establishing continuous class soil maps, this paper present an index of fuzzy soil classification generated from principal component analysis (PCA). The ability of classification of the index is tested with a soil database which including 9,260 soil samples, and the accurate rate of simulation was 91.7%. There are two …

Go to article

A Note On Grashof’S Theorem, Wen-Tung Chang, Chen-Chou Lin, Long-Iong Wu Dec 2005

A Note On Grashof’S Theorem, Wen-Tung Chang, Chen-Chou Lin, Long-Iong Wu

Journal of Marine Science and Technology–Taiwan

In this paper, Grashof’s theorem is justified from the perspective of the occurrence of stationary configurations and uncertainty configurations of four-link chains. The link length relations at stationary configurations and uncertainty configurations are examined in detail based on the triangle inequality, and then the conditions for the existence of a crank and a change point are deduced.

Go to article

An Adaptive Nonlinear Fuel Injection Control Algorithm For Motorcycle Engine, Tung-Chieh Chen, Chiu-Feng Lin, Chyuan-Yow Tseng, Chung-Ying Chen Dec 2005

An Adaptive Nonlinear Fuel Injection Control Algorithm For Motorcycle Engine, Tung-Chieh Chen, Chiu-Feng Lin, Chyuan-Yow Tseng, Chung-Ying Chen

Journal of Marine Science and Technology–Taiwan

The purpose of this research is to apply an adaptive fuel injection control algorithm on a motorcycle engine and evaluate its performance. A highly nonlinear switching type EGO sensor is used to measure the air fuel ratio of the engine. In the research, the nonlinear control algorithm is developed based on a Lyapunov function. Furthermore, an observer is also applied to estimate the air flow rate into the combustion room. The results show that the air fuel ratio and engine speed are stable under steady manoeuvres and the air-fuel ratio values are satisfactory.

Go to article

The Optimization Of The Reliability And Construction Cost Of Rc Bridges, Wen-Hu Tsao, Chi-Way Lin, Ming-Te Liang, Wen-Lung Wen-Lung Tsao Tsao Dec 2005

The Optimization Of The Reliability And Construction Cost Of Rc Bridges, Wen-Hu Tsao, Chi-Way Lin, Ming-Te Liang, Wen-Lung Wen-Lung Tsao Tsao

Journal of Marine Science and Technology–Taiwan

In this paper, the relationship between reliability and engineering system construction cost for obtaining optimum reliability was studied. This proposed approach was applied to the repair alternatives of existing reinforced concrete (RC) bridges for acquiring the result of optimization analysis. According to the D(degree) E(extent) R (relevancy) evaluation method, which is widely used by civil engineers in Taiwan the existing RC bridges with and without stridden rivers can be divided into 21 and 17 substructures, respectively. The use of the weighting value and the cost relation is to attain the relationship between the total engineering system construction cost and the …

Go to article

Loss Functions And Framework For Regional Flood Damage Estimation In Residential Area, Jui-Lin Kang, Ming-Daw Su, Ling-Fang Chang Sep 2005

Loss Functions And Framework For Regional Flood Damage Estimation In Residential Area, Jui-Lin Kang, Ming-Daw Su, Ling-Fang Chang

Journal of Marine Science and Technology–Taiwan

The risks of flooding damages for a region increase as the population and economy development increased in that area. Damage assessment and risk analysis are important issues for risk management and hazard mitigation. There are huge amount of data involved in the process of regional damage assessment and most of these data are spatially and temporally distributed. This paper focuses on the use of spatial data for capture of spatial characteristics of damage in natural calamities. Because it affects a large number of persons and families, flood damages in the residential area usually attract major attentions in regional flood hazard …

Go to article

Effects Of Closure Models On Supercavitating Bubble Development, Bin-Chen Wu, Jiahn-Horng Chen Sep 2005

Effects Of Closure Models On Supercavitating Bubble Development, Bin-Chen Wu, Jiahn-Horng Chen

Journal of Marine Science and Technology–Taiwan

Effects of different cavity closure models on the development sheet supercavitation of two-dimensional hydrofoils were examined in this report. The study was carried out under the assumption of potential flow for which a cavity closure model was needed. A potential-based boundary element method has been developed for this purpose. The models we employed included the constant velocity model and the short plate termination model. Several different airfoil shapes were tested. Their effects on the cavity shape, lift coefficient, cavity volume and computation efficiency were studied. Careful investigations show that closure models have insignificant influence on physical quantities, but do have …

Go to article

Design And Implementation Of A Low-Voltage 2.4-Ghz Cmos Rf Receiver Front-End For Wireless Communication, Wan-Rone Liou, Mei-Ling Yeh, Chun-An Tsai, Shun-Hsyung Chang Sep 2005

Design And Implementation Of A Low-Voltage 2.4-Ghz Cmos Rf Receiver Front-End For Wireless Communication, Wan-Rone Liou, Mei-Ling Yeh, Chun-An Tsai, Shun-Hsyung Chang

Journal of Marine Science and Technology–Taiwan

This paper presents the design of a 1.5 V CMOS RF receiver front-end system which contains a low noise amplifier (LNA) with band pass filter and a down conversion mixer. An inter-stage matching network is added between the common-source and common-gate transistors in the LNA’s first stage to further lower the noise and enhance the overall gain. An inductor is used in this inter-stage matching network because of the extra capacitive of MOSFETs in the LNA. The maximum gain achieved of this LNA is 15 dB. The single square-law structure was implemented for this low power consumption and high linearity …

Go to article

A Study Of Non-Linear Vibrational Behavior Of Cracked Structures By The Finite Element Method, Tzuo-Liang Luo, James Shih-Shyn Wu, Jui-Pin Hung Sep 2005

A Study Of Non-Linear Vibrational Behavior Of Cracked Structures By The Finite Element Method, Tzuo-Liang Luo, James Shih-Shyn Wu, Jui-Pin Hung

Journal of Marine Science and Technology–Taiwan

Numerical and experimental investigations provide a link to the location and size of cracks caused by natural vibrations. Cracks may generally result in the variation of structural stiffness and hence enable structures to vibrate nonlinearly. In order to understand the vibrational behavior of crack structures accurately, the study proposes a general and efficient algorithm based on the finite element assumptions and the bilinear vibrational theory. All formulae are derived from the time domain properly and may apply to the overall non-linear motion cycle completely. The contact effect is also considered by introducing the degree of penetration on the cracked surface. …

Go to article

A Grid-Based Gis Approach To Regional Flood Damage Assessment, Ming-Daw Su, Jui-Lin Kang, Ling-Fang Chang, Albert S Chen Sep 2005

A Grid-Based Gis Approach To Regional Flood Damage Assessment, Ming-Daw Su, Jui-Lin Kang, Ling-Fang Chang, Albert S Chen

Journal of Marine Science and Technology–Taiwan

Regional flood risk assessment is the base for a sound and comprehensive risk planning or management. The regional flood loss is the sum of the damages in all the flooded parcels. The data involved in this process are multifarious and difficult to establish and maintain especially in the developing countries that suffer most often from the flood hazard. A grid-based GIS approach to regional flood damage assessment is proposed in this paper. Aggregated census data that are relatively available were used instead of the data at parcel level. An algorithm was proposed to disaggregated these aggregated census data into spatially …

Go to article

Acoustic Point-Source Reflection From A Seabed With A Non-Uniform Fluid-Like Sediment Layer, Jin-Yuan Liu, Chung-Ray Chu, Yung-Hong Wu, Hsin-Hung Chen Sep 2005

Acoustic Point-Source Reflection From A Seabed With A Non-Uniform Fluid-Like Sediment Layer, Jin-Yuan Liu, Chung-Ray Chu, Yung-Hong Wu, Hsin-Hung Chen

Journal of Marine Science and Technology–Taiwan

Acoustic point-source reflection from a non-uniform seabed within which the density and sound speed vary continuously with depth is considered in this paper. This fundamental problem has illuminated many interesting phenomena about the effects of sediment stratification on acoustic wave interactions with the seabed. The analysis employs the analytical solutions for the Helmholtz equation in the sediment layer, in which the density and the sound speed are, respectively, described by three kinds of geological models. The results have demonstrated that the effects of sediment stratification are confined in a region in range, where the reflection field is dominated by the …

Go to article

Characteristics Of Drop Impact On Elastic And Compliant Surfaces, Jeng-Horng Chen Jun 2005

Characteristics Of Drop Impact On Elastic And Compliant Surfaces, Jeng-Horng Chen

Journal of Marine Science and Technology–Taiwan

Due to its importance and wide applications, drop impact on solid and liquid surfaces has been well studied. However, with the progress and wider applications of more sophisticated materials, the relatively less studied physical properties and behavior of a drop impact on elastic or compliant surfaces gradually become more important. Three kinds of common liquid drops impact on both elastic and compliant surfaces were studied experimentally using high-speed digital camera with regular light source at three different impact speeds. The impact effects on compliant surface and the expansioncontraction processes of impacted drops were recorded and analyzed. It is found that …

Go to article

An Investigation Of Contact Path And Kinematic Error Of Face-Gear Drives, Tsang-Dong Chung, Yun-Yuan Chang Jun 2005

An Investigation Of Contact Path And Kinematic Error Of Face-Gear Drives, Tsang-Dong Chung, Yun-Yuan Chang

Journal of Marine Science and Technology–Taiwan

Based on the face-gear generation process, the analytical geometry of face-gear drive with its mathematical model for tooth contact analysis of face-gear and spur pinion meshing was derived. In this paper, contact path and transmission error due to assembly misalignment are analyzed by using the proposed mathematical model and the tooth contact analysis. The effects of assembly error along the axis of face-gear, misalignment of crossed and angular displacement between axes of a spur pinion and a face-gear are all investigated. The results are illustrated by several examples

Go to article

A Study On The Practical Model Of Planned Effective Rainfall For Paddy Fields In Taiwan, Shi-Ming Tsai, Shinne Chen, Hsin-Yi Wang Jun 2005

A Study On The Practical Model Of Planned Effective Rainfall For Paddy Fields In Taiwan, Shi-Ming Tsai, Shinne Chen, Hsin-Yi Wang

Journal of Marine Science and Technology–Taiwan

No abstract provided.

Go to article

Motion Behavior Of Impact Oscillator, June-Yule Lee Jun 2005

Motion Behavior Of Impact Oscillator, June-Yule Lee

Journal of Marine Science and Technology–Taiwan

This paper concerns a mass-spring-damper linear oscillator with endstop system. The parameter dependence of the impact oscillator is studied and the techniques of the bifurcation diagram, phase trajectory, impact map and Poincare map are applied. For the driving frequency ranges that no explicit solutions in analytical method, a complete bifurcation diagram is plotted using numerical solutions. Consequently, the phenomena of the complete, incomplete and chaotic chattering are classified as m-impact period-n motion using impact map and Poincare map.

Go to article

A Synchronous Primary-Side Dimming Controller For Cold-Cathode Fluorescent Lamp Ballast, Jenn-Jong Shieh Jun 2005

A Synchronous Primary-Side Dimming Controller For Cold-Cathode Fluorescent Lamp Ballast, Jenn-Jong Shieh

Journal of Marine Science and Technology–Taiwan

In this paper, a rectified quasi-sinusoidal pulse width modulation (RQSPWM) controller is first proposed for the cold-cathode fluorescent lamp (CCFL) ballast to achieve a synchronous primary-side dimming control. It is seen that, with the novel controller, not only the lamp flickering problem and the thermometer effect can be eliminated but also the useful photo-coupler in secondary side can be avoided to reduce cost. Then, small signal models of the CCFL ballast and the proposed RQSPWM dimming controller are derived to analyze the performance of the ballast system and help corroborate hardware loop measurements. Finally, a prototype is constructed for verifying …

Go to article

Genetic Algorithms For Design Of Pipe Network Systems, Hong-Min Shau, Bi-Liang Lin, Wen-Chih Huang Jun 2005

Genetic Algorithms For Design Of Pipe Network Systems, Hong-Min Shau, Bi-Liang Lin, Wen-Chih Huang

Journal of Marine Science and Technology–Taiwan

In the last three decades, a significant number of methods for optimal design of pipe network systems have been developed using linear programming, non-linear programming, dynamic programming, enumeration techniques, and genetic algorithm (GA). This paper presents a genetic algorithm (GA) approach to the design of a pipe network systems. The objectives considered are minimization of the network cost in the practical requirement. Of all the preceding methods, GA based methods appear to be robust, as they can handle discrete pipes sizes with ease and produce a set of alternatives. By judgmentally selecting the Ruey-Fang district water supply system for the …

Go to article

A Research Combines Nondestructive Testing And A Neuro-Fuzzy System For Evaluating Rigid Pavement Failure Potential, Shuh-Gi Chern, Yu-Shih Lee, Rong-Feng Hu, Yen-Jen Chang Jun 2005

A Research Combines Nondestructive Testing And A Neuro-Fuzzy System For Evaluating Rigid Pavement Failure Potential, Shuh-Gi Chern, Yu-Shih Lee, Rong-Feng Hu, Yen-Jen Chang

Journal of Marine Science and Technology–Taiwan

In recent years, advances in hardware and software technology had brought to significant improvement of NDT (Non-Destructive Test) equipment. In the field of evaluation and designs for the airfield pavement, NDT has been extensively used. NDT is an efficient methodology for assessing the structural condition of an airfield pavement, in the meantime, engineers need to carry other methods for assessing pavement performance, such as visual condition, roughness, and friction characteristics in completing the overall pavement evaluation. In this research, a model combined neuro-fuzzy system, PCI method (pavement condition index, visual inspection) and NDT (Heavy Falling Weight Deflectometer, HWD, structural condition) …

Go to article

Electromechanical Analysis Of Piezoelectric Laminated Composite Beams, Ming-Hung Hsu Jun 2005

Electromechanical Analysis Of Piezoelectric Laminated Composite Beams, Ming-Hung Hsu

Journal of Marine Science and Technology–Taiwan

This work demonstrates the electromechanical behavior of piezoelectric laminated composite beams using the differential quadrature method (DQM). The Chebyshev-Gauss-Lobatto sample point equation is used to select the sample points. The electromechanical responses of piezoelectric laminated composite beams with various boundary conditions are determined. The transient responses of the derived systems are calculated using the Wilson-method. In this approach, only nine sample points are required to obtain convergence. Numerical results indicate that the DQM is valid for a piezoelectric laminated composite beam formulation

Go to article

Measurement Of Velocity Distribution For Flow Through A Bileaflet Valve Using Color-Coded Digital Particle Tracking Velocimetry, Tienfuan Kerh, Yen-Ming Chen, I Tsou Mar 2005

Measurement Of Velocity Distribution For Flow Through A Bileaflet Valve Using Color-Coded Digital Particle Tracking Velocimetry, Tienfuan Kerh, Yen-Ming Chen, I Tsou

Journal of Marine Science and Technology–Taiwan

An experimental method, the so-called color-coded Digital Particle Tracking Velocimetry system was set up in this study to investigate viscous flow through an artificial bileaflet valve with three different opening angles, 5°, 30°, and 45°, respectively. An oscilloscope that generated stable wave speed was taken to calibrate measuring result of the equipment. Besides, a fully developed pipe flow case was used to check the reliability of experimental system, and a statistical t-test was performed to further enhance the comparison of analytical solution and measurement. From the details of randomly distributed velocities, interpolated velocity components, and velocity profiles for the studied …

Go to article

Simulation And Assessment Of Air Impingement Cooling On Squared Pin-Fin Heat Sinks Applied In Personal Computers, Hwa-Chong Tien, Wei-Dong Huang Mar 2005

Simulation And Assessment Of Air Impingement Cooling On Squared Pin-Fin Heat Sinks Applied In Personal Computers, Hwa-Chong Tien, Wei-Dong Huang

Journal of Marine Science and Technology–Taiwan

The feasibility and effectiveness of air impingement cooling on pin-fin heat sinks applied in personal computers (PC) were investigated numerically in this study. The effects of fin height, fin width, base plate thickness of the heat sink, and ratio of the vertical spacing between the nozzle and the heat sink to jet diameter (z/D) were discussed in detail. For a PC with a P4, 2.8 GHz, 68.4 W CPU, it was found that the cooling effect by using air impingement on a heat sink with z/D = 4 and fin width 4.13 mm for the jet Reynolds number (Re) between …

Go to article

First Prev Next Last