Flow-induced vibration in the compressible cavity flow
Hao Li1, Jianguo Tan2, Juwei Hou3
Science and Technology on Scramjet Laboratory,
National University of Defense Technology,
E-mail: email@example.com, firstname.lastname@example.org, email@example.com
Abstract. The cavity plays an important role in the fuel-air mixing and combustion stability inside the hypersonic scramjet. However, the high levels of time-dependent loading resulting from the supersonic cavity flow can cause intense structural vibration even damage. Experiments and numerical simulations were performed to understand the complex fluid-structure interaction in this paper. A cantilever plate with a cavity was installed as a splitter plate in the supersonic mixing layer wind tunnel. The response displacements of this cantilever plate were measured by a non-intrusive laser vibrometer. Large eddy simulation (LES) was applied to calculate the aerodynamic loading. Results show that the number of time-dependent surface-averaged pressure difference agrees well with semi-empirical relation of Heller used to predict the resonance mode. The cantilever plate exhibits a directly dependent response to self-oscillation of supersonic cavity flow. Measurement results of displacement indicate that the vibration shape of this plate is dominantly two-dimensional.
Keywords: flow-induced vibration, supersonic cavity flow, cantilever plate, fluid-structure interaction.
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Cite this article
Li Hao, Tan Jianguo, Hou Juwei Flow‑induced vibration in the compressible cavity flow. Vibroengineering PROCEDIA, Vol. 14, 2017, p. 238‑243.
© JVE International Ltd. Vibroengineering PROCEDIA. Oct 2017, Vol. 14. ISSN 2345-0533