Aerodynamics and Fluid Mechanics Commons™
Open Access. Powered by Scholars. Published by Universities.™
13 Institutions 93 Full-Text Articles 132 Authors 60,929 Downloads
Recent Articles in Aerodynamics and Fluid Mechanics
Thermal Vacuum Integration For Cal Poly's Space Environments Laboratory, Chelsea Barackman, Steven Jackowski 
California Polytechnic State University
Thermal Vacuum Integration For Cal Poly's Space Environments Laboratory, Chelsea Barackman, Steven Jackowski
Aerospace Engineering
The purpose of the senior project is to construct a thermal vacuum by utilizing a preexisting vacuum chamber in the Space Environments Lab, and a donated Advanced Thermal Sciences (ATS) chiller. While a thermal vacuum is already available on campus, building one for the Space Environments Lab would grant undergraduates access to the equipment, allowing a much better understanding of testing methods and procedures in use by the aerospace industry. This paper explains the design and analysis of the thermal vacuum (T-VAC) project as well as the operation and procedures required for the ATS chiller and fill/drain tank. The ...
Near-Wake Flow Dynamics Of A Horizontal Axis Wind Turbine, Pooyan Hashemi Tari 
Western University
Near-Wake Flow Dynamics Of A Horizontal Axis Wind Turbine, Pooyan Hashemi Tari
Electronic Thesis and Dissertation Repository
Experiments have been conducted in a large wind tunnel set-up in order to study the flow structures within the near-wake region of a horizontal axis wind turbine. Particle Image Velocimetry (PIV) has been employed to quantify the mean and turbulent components of the flow field. The measurements have been performed in multiple adjacent horizontal planes in order to cover the area behind the rotor in a large radial interval, at several locations downstream of the rotor. The measurements were phase-locked in order to facilitate the re-construction of the three-dimensional flow field. Acquiring uniform particle distribution in the measurement planes as ...
The Near Wake Of A European Starling, Adam J. Kirchhefer Western University
The Near Wake Of A European Starling, Adam J. Kirchhefer
University of Western Ontario - Electronic Thesis and Dissertation Repository
The wake of a freely flying European starling (Sturnus vulgaris) was measured using high speed, time-resolved, particle image velocimetry, simultaneously with high speed cameras which imaged the bird. These measurements have been used to generate vector maps in the near wake that can be associated with the bird’s location and wing configuration. A kinematic analysis has been performed on select sequences of measurements to characterize the motion of the bird, as well as provide a point of comparison between the bird of the present study and other birds or flapping wings. Time series of measurements have been expressed as ...
On Compressible Gaseous Motions In Swirl Dominated Combustors, Brian A. Maicke 
University of Tennessee, Knoxville
On Compressible Gaseous Motions In Swirl Dominated Combustors, Brian A. Maicke
Doctoral Dissertations
In this dissertation, a number of models are derived to describe swirling flows. Both generalized compressible Bragg-Hawthorne and vorticity-stream function frameworks are determined and left in a generic form suitable for describing a number of different scenarios. These systems are solved for the bidirectional vortex flowfield by means of a Rayleigh-Janzen perturbation, which expands the governing equations in terms of the Mach number squared. The resulting equations are solved to provide a semi-analytical solution after the evaluation of a handful of numerical integrals. These solutions further the understanding of compressible flow in swirl-combustors, as previous compressible studies are primarily experimental ...
Self-Excited Oscillations Of The Impinging Planar Jet, David Arthurs 
McMaster University
Self-Excited Oscillations Of The Impinging Planar Jet, David Arthurs
Open Access Dissertations and Theses
This thesis experimentally investigates the geometry of a high-speed subsonic planar jet impinging orthogonally on a large, rigid plate at some distance downstream. This geometry has been found to be liable to the production of intense narrowband acoustic tones produced by self-excited flow oscillations for a range of impingement ratio, Mach number and nozzle thickness. Self-excited flows and acoustic tones were found to be generated in two distinct flow regimes: a linear regime occurring at relatively low Mach number, and a fluid-resonant regime occurring at higher Mach numbers. The linear regime has been found to generate acoustic tones exhibiting relatively ...
Analysis Of A Goldschmied Propulsor Using Computational Fluid Dynamics Referencing California Polytechnic’S Goldschmied Propulsor Testing, Cory A. Seubert California Polytechnic State University
Analysis Of A Goldschmied Propulsor Using Computational Fluid Dynamics Referencing California Polytechnic’S Goldschmied Propulsor Testing, Cory A. Seubert
Master's Theses and Project Reports
The Goldschmied Propulsor is a concept that was introduced in mid 1950's by Fabio Goldschmied. The concept combines boundary layer suction and boundary layer ingestion technologies to reduce drag and increase propulsor efficiency. The most recent testing, done in 1982, left questions concerning the validity of the results. To answer these questions a 38.5in Goldschmied Propulsor was constructed and tested in Cal Poly's 3x4ft wind tunnel. The focus of their wind tunnel investigation was to replicate Goldschmied's original testing and increase the knowledge base on the subject. The goal of this research was to create a ...
Hot-Wire Anemometer For The Boundary Layer Data System, William D. Neumeister California Polytechnic State University
Hot-Wire Anemometer For The Boundary Layer Data System, William D. Neumeister
Master's Theses and Project Reports
Hot-wire anemometry has been routinely employed for laboratory measurements of turbulence for decades. This thesis presents a hot-wire anemometer suitable for use with the Boundary Layer Data System (BLDS). BLDS provides a unique platform for in- flight measurements because of its small, self-contained, robust design and flexible architecture. Addition of a hot-wire anemometer would provide BLDS with a sensor that could directly measure flow velocity fluctuations caused by turbulence. Hot-wires are commonly operated in constant-temperature mode for high frequency response, but require a carefully tuned bridge. The constant-voltage anemometer (CVA) uses a simple op-amp circuit to improve frequency response over ...
Large Eddy Simulation (Les) Of Glass Fibre Dispersion In An Internally Spout-Fluidised Bed For Thermoplastic Composite Processing, Xiaogang Yang, Xiaobing Huang, Yuan Zong, Grance Dai 
Glyndŵr University
Large Eddy Simulation (Les) Of Glass Fibre Dispersion In An Internally Spout-Fluidised Bed For Thermoplastic Composite Processing, Xiaogang Yang, Xiaobing Huang, Yuan Zong, Grance Dai
Aeronautical Engineering
Large eddy simulation (LES) has been conducted to investigate glass fibre dispersion in an internally spout-fluidised bed with draft tube and disk-baffle, which was used in the manufacture of long glass fibre reinforced thermoplastic composites. The LES results have demonstrated that the internally spout-fluidised bed with draft tube and disk-baffle can remarkably improve its hydrody-namic behaviour, which can effectively disperse fibre bundles and promote pre-impregnation with resin powder in manufacturing fibre reinforced thermoplastics. The hydrodynamics of the spout-fluidised bed has been investigated and reported in a previous paper (Hosseini et al., 2009). This study attempts to reveal important features of ...
Aerodynamic Test Platform For Human Powered Vehicle (Hpv), Spencer Wangerin, Spencer Lillywhite, Colburn Davis California Polytechnic State University
Aerodynamic Test Platform For Human Powered Vehicle (Hpv), Spencer Wangerin, Spencer Lillywhite, Colburn Davis
Mechanical Engineering
The Aerodynamic Test Platform (ATP) for the Cal Poly HPV Club is a system that was designed by Cal Poly mechanical engineering students to measure aerodynamic characteristics of a human-powered vehicle (HPV). The HPV team desired a system that could quantify the lift, drag, and other aerodynamic qualities of a full scale HPV at various orientations in oncoming airflow. Established methods for determining aerodynamic characteristics include computational fluid dynamics (CFD) and wind tunnel testing of scaled models. The ATP was devised to simulate the test results given by a full-scale wind tunnel without requiring a wind tunnel large enough to ...
Test And Verification Of Vortex Shedding For A 3d Bluff Body, Paul D. Innes, Charles E. Carlson California Polytechnic State University
Test And Verification Of Vortex Shedding For A 3d Bluff Body, Paul D. Innes, Charles E. Carlson
Aerospace Engineering
Testing of a 3D bluff body with and without end plate tabs was performed in the California Polytechnic State University 3x4 ft low speed wind tunnel. The CP values were obtained for the test case with no end plate tabs for speeds of 10, 15, 20, and 30 m/s. It was observed that stronger vortex shedding ocured at the higher speed test cases. The model was shimmed to be at approximately 5° angle of attack in order to obtain symmetrical negative CP spikes for the top and bottom of the model without tabs. Trends were observed and ...
Numerical Investigation Of Highly Curved Turbulent Flows In Centrifugal Compressors And In A Simplified Geometry, Kevin J. Elliott Western University
Numerical Investigation Of Highly Curved Turbulent Flows In Centrifugal Compressors And In A Simplified Geometry, Kevin J. Elliott
Electronic Thesis and Dissertation Repository
Curvature effects are investigated in terms of a recently developed curvature corrected turbulence model in turbomachinery applications. Two centrifugal compressor stages and a curved geometry modelled after a centrifugal impeller are simulated using the curvature corrected SST (SST-CC) turbulence model. This work improves the understanding of how the SST-CC model predicts curvature effects. An analysis of the SST-CC production multiplier in both centrifugal cases reveals that the model is appropriately accounting for curvature effects, showing increased production near concave surfaces and decreased production near convex surfaces. This correlates well with the simplified geometry results and demonstrates that the simplified geometry ...
Popular Institutions
Popular Authors
Gary Hammock
University of Tennessee, Knoxville
Dnyanesh Digraskar
University of Massachusetts - Amherst
Clifton Cox
California Polytechnic State University
Nicholas Kleinschmit
University of Nebraska - Lincoln
Austin Kimbrell
University of Tennessee, Knoxville
Brian Godfrey
University of Tennessee, Knoxville
Chee-woon Kim
California Polytechnic State University
David Giles
California Polytechnic State University
Derick Daniel
University of Tennessee, Knoxville
Daniel Wilde
California Polytechnic State University
Based on downloads this month
Popular Articles
Cross-Flow, Staggered-Tube Heat Exchanger Analysis For High Enthalpy Flows, Gary Hammock
Simulations Of Flow Over Wind Turbines, Dnyanesh Digraskar
Two Element Linear Strength Vortex Panel Method, Clifton Cox
A Shock Tube Technique For Blast Wave Simulation And Studies Of Flow Structure Interactions In Shock Tube Blast Experiments, Nicholas Kleinschmit
Development And Verification Of A Navier-Stokes Solver With Vorticity Confinement Using Openfoam, Austin Kimbrell
Experimental Results For Viscosity Measurements Performed On The International Space Station Using Drop Coalescence In Microgravity, Brian Godfrey
Scale Modeling Of Cessna 172, Chee-woon Kim
Aerodynamic Performance Enhancement Of A Naca 66-206 Airfoil Using Supersonic Channel Airfoil Design, David Giles
A General Simulation Of An Air Ejector Diffuser System, Derick Daniel
Analysis Of Curvature Effects On Boundary Layer Separation And Turbulence Model Accuracy For Circulation Control Applications, Daniel Wilde
Based on downloads this month