Complex Geometry Effects on Cavity Resonance
| Autor: | Brian Owen Matthew Pruett, Russell Spillers, Steven J. Beresh, John F. Henfling, Katya M. Casper, Justin L. Wagner |
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| Rok vydání: | 2016 |
| Předmět: |
020301 aerospace & aeronautics
Stagnation temperature Engineering business.industry Aerospace Engineering Resonance 02 engineering and technology Structural engineering Mechanics Boundary layer thickness 01 natural sciences Compressible flow 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Complex geometry 0203 mechanical engineering Mach number 0103 physical sciences symbols Supersonic speed business Sound pressure |
| Zdroj: | AIAA Journal. 54:320-330 |
| ISSN: | 1533-385X 0001-1452 |
| DOI: | 10.2514/1.j054273 |
| Popis: | The flow over an aircraft bay is often represented using a rectangular cavity; however, this simplification neglects many features of actual flight geometry that could affect the unsteady pressure field and resulting loading in the bay. To address this shortcoming, a complex cavity geometry was developed to incorporate more realistic aircraft-bay features including shaped inlets, internal cavity structure, and doors. A parametric study of these features was conducted based on fluctuating pressure measurements at subsonic and supersonic Mach numbers. Resonance frequencies and amplitudes increased in the complex geometry compared to a simple rectangular cavity that could produce severe loading conditions for store carriage. High-frequency content and dominant frequencies were generated by features that constricted the flow such as leading-edge overhangs, internal cavity variations, and the presence of closed doors. Broadband frequency components measured at the aft wall of the complex cavities were also sig... |
| Databáze: | OpenAIRE |
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