Complex Geometry Effects on Cavity Resonance

Casper, Katya Maria; Wagner, Justin L.; Beresh, Steven J.; Henfling, John F.; Spillers, Russell Wayne; Pruett, Brian Owen Matthew

doi:10.2514/1.J054273

Complex Geometry Effects on Cavity Resonance

Journal Article · Mon Sep 07 00:00:00 EDT 2015 · AIAA Journal

DOI:https://doi.org/10.2514/1.J054273· OSTI ID:1465796

Casper, Katya Maria ^[1]; Wagner, Justin L. ^[1]; Beresh, Steven J. ^[1]; Henfling, John F. ^[1]; Spillers, Russell Wayne ^[1]; Pruett, Brian Owen Matthew ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

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 significantly higher than in the rectangular geometry. Furthermore, these changes highlight the need to consider complex geometric effects when predicting the flight loading of aircraft bays.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1465796

Report Number(s):: SAND--2017-0210J; 666715

Journal Information:: AIAA Journal, Journal Name: AIAA Journal Journal Issue: 1 Vol. 54; ISSN 0001-1452

Publisher:: AIAACopyright Statement

Country of Publication:: United States

Language:: English

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Resonance dynamics in compressible cavity flows using time-resolved velocity and surface pressure fields Wagner, Justin L.; Beresh, Steven J.; Casper, Katya M. Journal of Fluid Mechanics, Vol. 830 https://doi.org/10.1017/jfm.2017.606	journal	October 2017
Spatial distribution of pressure resonance in compressible cavity flow Casper, Katya M.; Wagner, Justin L.; Beresh, Steven J. Journal of Fluid Mechanics, Vol. 848 https://doi.org/10.1017/jfm.2018.346	journal	June 2018
Fluid–Structure Interactions on a Tunable Store in Complex Cavity Flow Casper, Katya M.; Wagner, Justin L.; Beresh, Steven J. Journal of Aircraft, Vol. 56, Issue 4 https://doi.org/10.2514/1.c035050	journal	July 2019
Response of a Store with Tunable Natural Frequencies in Compressible Cavity Flow Wagner, Justin L.; Casper, Katya M.; Beresh, Steven J. AIAA Journal, Vol. 54, Issue 8 https://doi.org/10.2514/1.j054688	journal	August 2016
Volumetric Velocimetry of Complex Geometry Effects on Transonic Flow over Cavities DeMauro, Edward P.; Beresh, Steven J.; Casper, Katya M. AIAA Journal, Vol. 57, Issue 5 https://doi.org/10.2514/1.j057714	journal	May 2019
Response of a Store with Tunable Natural Frequencies in Compressible Cavity Flow Wagner, Justin L.; Casper, Katya M.; Beresh, Steven J. 53rd AIAA Aerospace Sciences Meeting https://doi.org/10.2514/6.2015-1293	conference	January 2015
Spatial Distribution of Pressure Resonance in Compressible Cavity Flow Casper, Katya M.; Wagner, Justin L.; Beresh, Steven J. 55th AIAA Aerospace Sciences Meeting https://doi.org/10.2514/6.2017-1476	conference	January 2017
Resonance Start-up in a Rectangular Cavity Turpin, Aaron M.; Chin, Daniel Y.; Hill, Jonathan L. 2018 Fluid Dynamics Conference https://doi.org/10.2514/6.2018-3871	conference	June 2018

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