基于高效数值方法的高速飞行器气动力热特性快速预测研究  

Fast prediction based on effective numerical method for aerodynamic force and heat of high speed vehicles

作　　者：王荣[1] 张学军[1] 纪楚群[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《空气动力学学报》2015年第4期530-535,共6页Acta Aerodynamica Sinica

摘　　要：结合空间推进数值模拟方法和流线追踪法发展了气动力、热快速预测技术。针对高速飞行器的算例研究表明,相对常规时间推进方法,基于空间推进法的气动快速预测方法计算效率提高了一个量级,而两者气动力计算精度相当,相对实验热流预测误差在20%以内。所发展的技术为适应气动外形快速选型和优化设计需求提供了有效的方法。A fast aerodynamic characteristics prediction technique is developed to predict aer- odynamic force and heat, combining effective space marching numerical method with engineering method based on surface stream tracking technique. Hypersonic aerodynamic forces are obtained effectively by solving the Euler equations numerically with fast space marching method. In order to calculate the heat flux, an engineering method, called tracking the surface stream trace based on the axisymmetric analogue technique and boundary layer theory, is adopted and developed to be applicable for complex geometry. The inviscid flow parameters and surface stream lines re- quired in the engineering method are obtained from above mentioned inviscous numerical flow fields. The proposed method for aerodynamic force and heat prediction is applied to high speed vehicles, the results show that the space marching method saves the computational cost enor- mously, approximately one order less comparing to the time marching method, while the two methods have similar precision in aerodynamic force evaluation. The predicted error of heat flux is within 20% comparing to that of wind tunnel test. The technique promoted is an effective ap- proach suitable for the needs of fast aerodynamic configuration design and optimization.

关 键 词：空间推进 流线追踪 高速飞行器 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]