适用于高速流动的γ-Re_(θ)转捩模型研究  

Study on γ-Re_(θ) transition model for high speed flow

作　　者：孙泓朴 戴梧叶 吴宁宁 许灵芝 Sun Hongpu;Dai Wuye;Wu Ningning;Xu Lingzhi(Beijing Aerospace Technology Institute,Beijing 100074,China;National Key Laboratory of Aerospace Flight Technology,Xiongan 071700,China)

机构地区：[1]北京空天技术研究所,北京100074 [2]空天飞行技术全国重点实验室,雄安071700

出　　处：《空天技术》2024年第2期99-107,共9页Aerospace Technology

摘　　要：随着高速飞行器空域及速域的不断拓展,准确预测高速飞行器边界层转捩对飞行器气动性能的设计变得越来越重要。传统γ-Re_(θ)转捩模型中的经验关系式是使用低速平板边界层数据标定得到的,不适用于高速边界层转捩预测,为了改善这一问题,基于DNS计算数据与风洞试验数据,改进了模型中转捩动量厚度雷诺数的经验关系式。选取了高速平板绕流与尖锥绕流算例,验证了提出的经验关系式,结果表明传统转捩模型在预测高速边界层转捩时会过于提前预估转捩的发生,而改进后的转捩模型可以很好地预测转捩起始位置与转捩区长度,更适用于高速边界层转捩预测。With the expansion of the airspace and velocity domain of high-speed(supersonic and hypersonic)aircraft,the accurate prediction of boundary layer transition is becoming more and more important for the aerodynamic performance design of high-speed aircraft.In the originalγ-Re_(θ)transition model,the empirical relation based on low-speed plate boundary layer transition is not suitable for high-speed boundary layer transition prediction.In order to solve this problem,the empirical relation of momentum thickness Reynolds number is improved based on DNS calculation data and wind tunnel test data.Examples of highspeed plate and sharp cone flow are selected to verify the empirical relationship.The results show that the original transition model will predict the transition onset position too early when predicting transition in highspeed boundary layer,while the improved transition model can give onset and extent of transition accurately,and is more suitable for high-speed boundary layer transition prediction.

关 键 词：边界层转捩 高速 转捩模型 可压缩性修正 γ-Re_(θ)转捩模型 转捩动量厚度雷诺数 

分 类 号：V411.3[航空宇航科学与技术—航空宇航推进理论与工程]