Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Aerogels (2)
- Adverse pressure gradient (1)
- Aerogel Filters (1)
- Airfoil (1)
- CAD (1)
-
- CME (1)
- Catalytic aerogels (1)
- Creo (1)
- Design (1)
- Diesel Particulate Filter (1)
- Diesel Particulate Generator (1)
- Diesel Particulates (1)
- Differential equations (1)
- Diffusiometer (1)
- Diffusion (1)
- Drag (1)
- Electric (1)
- Endurance factor (1)
- Flow Separation (1)
- Flow through aerogels (1)
- Flywheel (1)
- Gas flow (1)
- Hypersonic (1)
- Laser sintering (1)
- Lift (1)
- Mechanical (1)
- Molecular dynamics (1)
- Nanoparticle (1)
- Press (1)
- Punch (1)
Articles 1 - 10 of 10
Full-Text Articles in Engineering
A Molecular Dynamics Study Of The Laser Sintering Process And Subsequent Mechanical Properties Of Γ-Tial Nanoparticles, Eleanor Dickens
A Molecular Dynamics Study Of The Laser Sintering Process And Subsequent Mechanical Properties Of Γ-Tial Nanoparticles, Eleanor Dickens
Honors Theses
Using molecular dynamics (MD) simulations, the laser sintering additive manufacturing process is investigated through the observation of γ-TiAl nanoparticles. This process is conducted using both uni-directional chain and stacking configurations. By mimicking the heating process and varying laser sintering parameters such as heating rater, sintering temperature, and particle orientation, the fusion behavior and resulting products are analyzed for both chain and stacking NP patterns. In of single chain cases, it is noticed that slower heating rates and higher melting temperatures yield larger neck growth between each individual particle and thus produce a more stable product. This leads to stronger mechanical …
Analysis On Fuel Options For Scramjet Engines With The Study To Lower The Starting Mach Number, Sumantra Luitel, Gagan Dangi
Analysis On Fuel Options For Scramjet Engines With The Study To Lower The Starting Mach Number, Sumantra Luitel, Gagan Dangi
Honors Theses
The main objectives of this report were to perform analysis of an ideal scramjet engine, to assess the influence of fuel on endurance factor, and the possibility of lowering the starting Mach Number of the scramjet. In the first part, an ideal cycle parametric analysis was conducted on three different fuels i.e. Liquid Hydrogen (LH2), Jet Propellant 7 (JP-7), and Rocket Propellant (RP-1), taking into account their availability, physical properties, current uses, and potential uses. The detailed analysis is done largely relying on a 9 step Parametric Cycle Analysis technique to study how fuel properties influence the variation of seven …
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Honors Theses
Almost all designs start with a design requirement. These may be weight, volume, clearance, and even custom calculations. Finding a solution that meets these requirements often involves tedious and time-consuming iterations. Once the solution has been found, the design must be optimized to find the best possible solution. Finding the ‘best possible design’ requires substantial time and effort dedicated to iterating and analyzing the potential model solutions. This is where Parametric design comes into play. The Parametric design aids in specifying the key parameters of the design and makes changes interactively, with the model updating automatically. The purpose of this …
Computational Study On Suppression Of Airfoil Flow Separation Using High-Frequency Translational Surface Actuation, Bibek Gupta
Computational Study On Suppression Of Airfoil Flow Separation Using High-Frequency Translational Surface Actuation, Bibek Gupta
Honors Theses
Flow separation is a phenomenon that occurs when pressure increases in the streamwise direction of a flow, making a distinctive boundary layer or separation bubble. It causes aircraft to experience an increase in drag and noise and a decrease in a lift, hence degrading their aviation performance. This study uses numerical simulations to understand better the effects of high-frequency translational surface actuation (HFTSA) on flow separation control. The numerical simulations mimic the experimental parameters of an experiment performed by Okoye et al. on using the HFTSA system to control flow separation. A symmetrical airfoil structure of chord length of 0.3 …
Mathematical Modeling Of A Variable Mass Rocket’S Dynamics Using The Differential Transform Method, Ashwyn Sam
Mathematical Modeling Of A Variable Mass Rocket’S Dynamics Using The Differential Transform Method, Ashwyn Sam
Honors Theses
In this paper, the mathematical modelling of a rocket with varying mass is investigated to construct a function that can describe the velocity and position of the rocket as a function of time. This research is geared more towards small scale rockets where the nonlinear drag term is of great interest to the underlying dynamics of the rocket. A simple force balance on the rocket using Newton’s second law of motion yields a Riccati differential equation for which the solution yields the velocity of the rocket at any given time. This solution can then be integrated with respect to time …
Diesel Particulate Generation, Matthew Ferdenzi
Diesel Particulate Generation, Matthew Ferdenzi
Honors Theses
The goal of this project is to design a diesel particulate generator to test aerogels as diesel particulate filters. Diesel particulate generators are machines that generate diesel particulate matter, or diesel soot. Diesel particulate filters have been recently put into the market to help many car companies meet the ever-changing diesel emission regulations set by the EPA and other international agencies. The main goal of the filter is to block soot from exiting to the environment. Once the filter is full, the soot is oxidized and released. The problem with these filters is that they are large, costly, detrimental to …
Design Of Diffusiometer For Aerogel Monoliths, Kamin Sylvia
Design Of Diffusiometer For Aerogel Monoliths, Kamin Sylvia
Honors Theses
Aerogels’ have great potential to be used as catalytic substrates and filters. To use them as such, we must first understand how gas flows through them. Diffusivity is a property of aerogels that relates the gas flow through a sample with the pressure gradient driving the flow. This project sets out to design an experimental apparatus (diffusiometer) and methodology that can be used to obtain diffusivity values of various kinds of aerogels. Adapting the method outlined in Stumpf et. al 1992[1], a diffusiometer was designed and built for aerogels at sub-atmospheric pressures. This device utilizes a control mass system rather …
Boat-Lift Design And Analysis, Nathan Schick
Boat-Lift Design And Analysis, Nathan Schick
Honors Theses
A current in production 6000 lb. rated boat-lift is being sold at “Great Lake Lifts”. The lift was tested experimentally and proved to hold at least 8000 lb. The design team successfully modeled the current lift on Ansys to help the customer understand where the weakest points in the design were. Following the creation of the initial lift design, the design team proposed and tested modifications that could be made in order to make the lift more structurally sound. The initial lift had a maximum deflection of 0.43846 inches, a maximum stress of 15880 psi, and a safety factor of …
Attitude Determination Control Testing System (Helmholtz Cage And Air Bearing), Nicolas Theoret
Attitude Determination Control Testing System (Helmholtz Cage And Air Bearing), Nicolas Theoret
Honors Theses
The WALI team at Western Michigan University requested a test environment to validate their CubeSat’s de-tumbling control system and hardware. The test environment required a Helmholtz cage and spherical air bearing. The Helmholtz cage provides an adjustable magnetic field to simulate low earth orbit; the spherical air bearing simulates the friction free environment the CubeSat will experience in space. In conjunction, the two components create an adjustable system that simulates a satellite in low earth orbit.
Design Of A Tandem Rotor Hovering Vehicle, Brent Kostich
Design Of A Tandem Rotor Hovering Vehicle, Brent Kostich
Honors Theses
An investigation of thrust vectoring and an examination of existing tandem rotor dynamics were used to develop a structural body for a tandem rotor vehicle, derive the equations of motion of the system, and simulate a dynamic model of the vehicle. A vehicle prototype was constructed while further application of remote control capabilities, flight testing, and control development were researched. The dynamic simulation was based on a linear model of the system so as to open the possibility of implementing a control system. The simulation results show that thrust synchronization yields a predictable motion response. The prototype constructed did not …