Response of a store with tunable natural frequencies in compressible cavity flow
Abstract
Fluid–structure interactions that occur during aircraft internal store carriage were experimentally explored at Mach 0.58–1.47 using a generic, aerodynamic store installed in a rectangular cavity having a length-to-depth ratio of seven. The store vibrated in response to the cavity flow at its natural structural frequencies, and it exhibited a directionally dependent response to cavity resonance frequencies. Cavity tones excited the store in the streamwise and wall-normal directions consistently, whereas the spanwise response to cavity tones was much more limited. Increased surface area associated with tail fins raised vibration levels. The store had interchangeable components to vary its natural frequencies by about 10–300 Hz. By tuning natural frequencies, mode-matched cases were explored where a prominent cavity tone frequency matched a structural natural frequency of the store. Mode matching in the streamwise and wall-normal directions produced substantial increases in peak store vibrations, though the response of the store remained linear with dynamic pressure. Near mode-matched frequencies, changes in cavity tone frequencies of only 1% altered store peak vibrations by as much as a factor of two. In conclusion, mode matching in the spanwise direction did little to increase vibrations.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1325714
- Report Number(s):
- SAND-2015-6962J
Journal ID: ISSN 0001-1452; 599048
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIAA Journal
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 8; Journal ID: ISSN 0001-1452
- Publisher:
- AIAA
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Wagner, Justin L., Casper, Katya M., Beresh, Steven J., Hunter, Patrick S., Spillers, Russell W., and Henfling, John F. Response of a store with tunable natural frequencies in compressible cavity flow. United States: N. p., 2016.
Web. doi:10.2514/1.J054688.
Wagner, Justin L., Casper, Katya M., Beresh, Steven J., Hunter, Patrick S., Spillers, Russell W., & Henfling, John F. Response of a store with tunable natural frequencies in compressible cavity flow. United States. https://doi.org/10.2514/1.J054688
Wagner, Justin L., Casper, Katya M., Beresh, Steven J., Hunter, Patrick S., Spillers, Russell W., and Henfling, John F. Fri .
"Response of a store with tunable natural frequencies in compressible cavity flow". United States. https://doi.org/10.2514/1.J054688. https://www.osti.gov/servlets/purl/1325714.
@article{osti_1325714,
title = {Response of a store with tunable natural frequencies in compressible cavity flow},
author = {Wagner, Justin L. and Casper, Katya M. and Beresh, Steven J. and Hunter, Patrick S. and Spillers, Russell W. and Henfling, John F.},
abstractNote = {Fluid–structure interactions that occur during aircraft internal store carriage were experimentally explored at Mach 0.58–1.47 using a generic, aerodynamic store installed in a rectangular cavity having a length-to-depth ratio of seven. The store vibrated in response to the cavity flow at its natural structural frequencies, and it exhibited a directionally dependent response to cavity resonance frequencies. Cavity tones excited the store in the streamwise and wall-normal directions consistently, whereas the spanwise response to cavity tones was much more limited. Increased surface area associated with tail fins raised vibration levels. The store had interchangeable components to vary its natural frequencies by about 10–300 Hz. By tuning natural frequencies, mode-matched cases were explored where a prominent cavity tone frequency matched a structural natural frequency of the store. Mode matching in the streamwise and wall-normal directions produced substantial increases in peak store vibrations, though the response of the store remained linear with dynamic pressure. Near mode-matched frequencies, changes in cavity tone frequencies of only 1% altered store peak vibrations by as much as a factor of two. In conclusion, mode matching in the spanwise direction did little to increase vibrations.},
doi = {10.2514/1.J054688},
journal = {AIAA Journal},
number = 8,
volume = 54,
place = {United States},
year = {Fri May 20 00:00:00 EDT 2016},
month = {Fri May 20 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Resonance dynamics in compressible cavity flows using time-resolved velocity and surface pressure fields
journal, October 2017
- Wagner, Justin L.; Beresh, Steven J.; Casper, Katya M.
- Journal of Fluid Mechanics, Vol. 830
Fluid–Structure Interactions on a Tunable Store in Complex Cavity Flow
journal, July 2019
- Casper, Katya M.; Wagner, Justin L.; Beresh, Steven J.
- Journal of Aircraft, Vol. 56, Issue 4
Simultaneous PSP and surface deformation measurements for fluid-structure interactions in a shock tube
conference, June 2018
- Lynch, Kyle P.; Jones, Elizabeth; Wagner, Justin L.
- 2018 Fluid Dynamics Conference
Stochastic Store Trajectory of Ice Models from a Cavity into Supersonic Flow
journal, July 2019
- Chin, Daniel; Granlund, Kenneth; Maatz, Ian
- Journal of Aircraft, Vol. 56, Issue 4