新一代战斗机非定常流动数值研究综述

doi:10.7527/S1000-6893.2019.23451

Abstract

Abstract: The new generation fighters emphasize the super-maneuverability and high stealthy properties. The static stall and dynamic stall at high angles of attack and unsteady air-loads around the embedded weapon bay at supersonic speed are very challenging. The high accuracy and efficiency numerical simulations are urgently required. To simulate the flowfields accurately, clearly explore the flow mechanisms and effectively control the unsteady airloads, it’s required to develop the highly accurate and efficient Reynolds-Averaged Navier-Stokes and Large Eddy Simulation (RANS-LES) hybrid model, including the model itself, the coupled high-order adaptive dissipation scheme, fundamental turbulence model, high quality computational grids, high-order time marching method, the statistical method of unsteady flow, and so on. This kind of RANS-LES hybrid model has been proposed, developed, validated and applied to the new-generation fighters, including the single component, junctions, even complete fighters. After comparing with the measurements, the numerical simulations perform very well, including the mean forces, and the pressure fluctuations. Therefore, the RANS-LES hybrid model can provide the theoretical basis and analyzing tools for the new-generation fighter design.

Key words: super-maneuverability, static/dynamic stall, embedded weapon bay, RANS-LES hybrid method, adaptive dissipation scheme

CLC Number:

V211.4

XIAO Zhixiang, CUI Wenyao, LIU Jian, LUO Kunyu, SUN Yuanhao. Review of numerical research on unsteady flows of the new generation fighters[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(6): 523451-523451.

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Review of numerical research on unsteady flows of the new generation fighters

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