高超声速飞行器在中间大气层内的飞行速度研究

Flying Speed of Hypersonic Aircraft in the Mesosphere

基于FLUENT软件,采用Sp-A湍流模型并运用AUSM计算格式,通过对球头模型在高超声速来流下的外流场模拟,得到了该模型在30km,45km,53km,60km和75km高度处,满足氧化铝陶瓷最大使用温度的极限飞行马赫数。结果表明:在53km以下时,极限马赫数随高度增加而减小,之后再增大,变化趋势符合气温变化规律,静温对驻点处的最高温影响巨大。

Based on the FLUENT software package,the Sp-A turbulence model and AUSM computational format are used to calculate the maximum Match Number of the highest allowed temperature of the ceramic aluminum oxide at various of heights including 30 km,45 km,53 km,60 km and 75 km by modeling the external filed of the atmosphere at ultrasonic speed. Results show that below 53 km,the maximum Match Number decreases with the height,and then increases. The changes have the same trend with the changes of the ambient temperature. The static temperature has the most significant influences to the stationary point.