超声速空腔流动波系演化及噪声控制研究进展

doi:10.7527/S1000-6893.2018.22366

Abstract

Abstract: Cavity structure is widely used in the advanced aircraft and engine, such as internal weapon bay, wheel well, optical dome, scramjet combustor, and thrust-vectoring nozzle. However, these cavities generally face severe aerodynamic noise in practical applications. Research shows the generation of cavity noise is closely related to the unsteady flow and complex wave structure. For the systematic understandings of the wave evolution, the mechanism of noise generation and the mechanism of noise control, the research on the noise induced by supersonic cavity flow is reviewed. In this paper, the main characteristics of closed, transitional and open supersonic cavity flows are introduced. To address the open cavity flow that generates the most serious aerodynamic noise, the formation, propagation and interaction of the seven typical flow structures are analyzed. In addition, three types of generation mechanisms of cavity noise are introduced, and their similarities and differences on each element of feedback model are analyzed. Furthermore, five possible ways to control supersonic cavity noise are summarized, pointing out that little attention has been paid to the fifth way which intends to control noise by breaking the propagation of feedback waves. Finally, unresolved issues in the current research are pointed out, and suggestions for further research are proposed.

Key words: supersonic, cavity flow, flow-induced noise, wave structures, pressure oscillation, noise control

CLC Number:

V211
TB84

LIU Jun, CAI Jinsheng, YANG Dangguo, SHI Ao, LU Bo. Research progress in wave evolution and noise control for supersonic cavity flows[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(11): 22366-022366.

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Research progress in wave evolution and noise control for supersonic cavity flows

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