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应用CFD方法研究了配备高速气流吹袭防护装置的人椅系统的气动特性。空间离散采用Osher逆风格式,紊流模型采用基于Spalart-Allmaras一方程的DES方法,在马赫数为0.6和1.2;迎角-10～30°;侧滑角为0°和15°范围内的粘性大分离流;以及来流马赫数为0.8和1.6;迎角5～30°;侧滑角为0,-20和-50°条件下,对有无防护装置的人椅系统气动特性进行了数值模拟。计算结果与试验结果吻合较好,高速气流吹袭防护装置在高速弹射过程中有效地保护了人体。
The CFD method was used to study the aerodynamic characteristics of a human-chair system equipped with high-speed airflow blow protection device. The spatial discretization is based on the Osher inverse wind format. The turbulence model uses the DES method based on the Spalart-Allmaras one equation with viscosities of Mach 0.6 and 1.2; an attack angle of -10 to 30 °; and side slip angles of 0 ° and 15 ° Large separation flow; and aerodynamic characteristics of the human-to-chair system with and without a guard were numerically obtained with Mach Mach numbers of 0.8 and 1.6; an attack angle of 5 to 30 °; and side slip angles of 0, -20 and -50 ° simulation. The calculated results are in good agreement with the experimental results. The high-speed airflow blow protection device effectively protects the human body during high-speed ejection.