The study of three-dimensional open cavity flow with and without cover plates at the
edges of the cavity at freestream Mach number of 0.85 was performed. Such open
cavities find their application in landing gear wells, bomb bay of an airplane and sunroof
or window of an automobile. The aerodynamic noise and the flow field together in the
above mentioned cavities lead to self-sustaining flow oscillations. These self-sustaining
flow oscillations results in the structural failure in the surrounding of the cavity due to
resonance phenomenon in the aircrafts and lead to loud and unbearable noise both in
aircrafts and automobiles. Understanding this aeroacoustic phenomenon helps us in
reducing the noise, increase the component stability and passenger comfort. Therefore,
this problem has become an important topic of research for several decades in
aerospace and automobile fields.
In this thesis an effort was made to investigate the fully developed turbulent flow
over an open cavity and to evaluate the effect of cover plates numerically using the
detached eddy simulation (DES) formulation. For this purpose, computational fluid
dynamics approach was utilized on the M219 cavity at Mach 0.85 using DES with the
Spalart-Allmaras (S-A) turbulence model. Two cavity cases were modeled. The test
case 1 is a three-dimensional open cavity without cover plates and the test case 2 is a
three-dimensional open cavity with cover plates at the edges of the cavity. Furthermore,
three variants of DES were considered for the test case 2 cavity namely Spalart-
Allmaras, k-ω-SST and realizable k-ε model, whereas for the test case 1 cavity only the
DES S-A model was employed. / Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering
| Identifer | oai:union.ndltd.org:WICHITA/oai:soar.wichita.edu:10057/3334 |
| Date | 05 1900 |
| Creators | Syed, Shoeb Ahmed |
| Contributors | Hoffmann, Klaus A. |
| Publisher | Wichita State University |
| Source Sets | Wichita State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
| Format | xx, 90 p., 12270939 bytes, 1843 bytes, application/pdf, text/plain |
| Rights | Copyright First Name Last Name, 2010. All rights reserved |
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