| Descript |
103 p |
| Note |
Source: Masters Abstracts International, Volume: 45-01, page: 0445 |
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Thesis (M.A.Sc.)--University of Waterloo (Canada), 2006 |
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Aeroacoustic resonance in a cavity is caused by instability in the flow of air and the geometry of the cavity. Aeroacoustic resonance occurs in many industrial applications, and usually causes noise and fatigue problems. The ability to predict and solve aeroacoustic resonance is of great interest to engineers. The Unsteady Reynolds Averaged Navier-Stokes (URANS) approach with the standard k--epsilon turbulence model is employed to simulate this resonance. In order to obtain reliable results, the imposition of proper boundary conditions and boundary-condition independence tests are necessary. In this thesis; non-reflecting and Riemann invariant boundary conditions are applied and a domain-size independence test is carefully studied. As reported in the literature for a similar study [14], the boundary-layer thickness affects the resonance in terms of its magnitude and frequency. Therefore, the effect of the boundary-layer thickness is investigated in this thesis |
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In the present study, non-reflecting boundary conditions perform very well for the aeroacoustic resonance simulation. From the simulation results and experimental data, it is believed that the observed deep cavity resonance is a type of transverse fluid-resonant oscillation. The main controlling factor of the resonance magnitude is the convecting velocity at the opening of the cavity. (Abstract shortened by UMI.) |
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School code: 1141 |
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DDC |
| Host Item |
Masters Abstracts International 45-01
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| Subject |
Engineering, Aerospace
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Engineering, Mechanical
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0538
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0548
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| Alt Author |
University of Waterloo (Canada)
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