Flow-induced vibration in the compressible cavity flow
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 St 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.
flow-induced vibration supersonic cavity flow cantilever plate fluid-structure interaction
Hao Li Jianguo Tan Juwei Hou
Science and Technology on Scramjet Laboratory, National University of Defense Technology,Changsha, Hunan Province, Peoples Republic of China
国际会议
The 28th International Conference on Vibroengineering (第28届国际振动工程会议)
北京
英文
238-243
2017-10-19（万方平台首次上网日期，不代表论文的发表时间）