高速飞行器空腔脉动压力主动控制与非线性数值模拟

doi:10.7527/S1000-6893.2014.0277

Abstract

Abstract:

Prediction of oscillating pressure is a key technology for the weapon bay of high-speed aircraft cavity. Nonlinear numerical simulation is proposed as a new method to analyze noise recently. In order to evaluate the prediction performance of cavity noise, nonlinear numerical simulation solver is combined with Reynolds-averaged Navier-Stokes(RANS) equation. Firstly, the flow field around cavity is solved by RANS, and the average solution of initial turbulent statistics is obtained which contains the basic characteristics of average flow field and statistics description of turbulence fluctuation. After that, noise source is refactored and the spreading of pressure fluctuation is simulated precisely by the nonlinear acoustics solution. According to the comparison of the cavity noise calculation and experimental results under Ma = 1.5 and Ma = 5, it indicates that nonlinear numerical solution is able to well predict cavity flow noise at high speed. Based on that, the contribution to noise suppression made by active control such as adding jet screen at the leading edge of cavity under Ma = 1.5 and Ma = 5 is investigated. It is found that jet screen is suitable for suppression of oscillating pressure under supersonic condition as well as in hypersonic state.

Key words: oscillating, nonlinear, cavity, turbulence, active control

CLC Number:

V211.3

WANG Yiding, Guo Liang, TONG Mingbo, Zhang Jie. Active control and nonlinear numerical simulation for oscillating pressure of high-speed aircraft cavity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(1): 213-222.

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Active control and nonlinear numerical simulation for oscillating pressure of high-speed aircraft cavity

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