战斗机垂尾脉动压力数值模拟

doi:10.7527/S1000-6893.2016.0121

Abstract

Abstract:

IDDES flow simulation technique based on hybrid RANS/LES method is realized on TRIP, a trisonic fluid simulation software platform. Separating flows around airfoil NACA0021 with 60° angle of attack and tandem cylinders are simulated to validate the precision of hybrid RANS/LES method. Then, fluctuating pressure of a fighter vertical tail is calculated with the presented RANS/LES method. Flow Mach number is 0.1, Reynolds number based on length of fighter is 2 million, and angles of attack are 20°, 30° and 40°. Fluctuating pressure of fighter vertical tail is analyzed through fluctuating pressure coefficients, power spectrum density of fluctuating pressure, space flow structure and side force response. Numerical results show that fluctuating pressure on tip of vertical tail increases obviously when vertical tail is immersed in broadband turbulence fluctuating flow behind the breakup of separating vortex from strake wing.

Key words: fighter, vertical tail, fluctuating pressure, RANS/LES, computational fluid dynamics (CFD)

CLC Number:

V211.3

MENG Dehong, SUN Yan, WANG Yuntao, LI Wei. Numerical simulation of fluctuating pressure of fighter vertical tail[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(8): 2472-2480.

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Numerical simulation of fluctuating pressure of fighter vertical tail

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