观察超音速下飞行器的升力、阻力的产生及绕飞行器流动的流场细节,包括激波、膨胀波的构型,可以采用以下两种方法: (1) Conduct flight tests using the actual vehicle 进行实际飞行器的飞行试验 (2) Run wind-tunnel tests on a small-scale modelof the vehicle 用飞行器的缩小模型进行风洞实验
Chapter 3 Fundamentals of Inviscid, incompressible Flow Theoretical fluid dynamics, being a difficult subject, is for convenience, commonly divided into two branches, one treating frictionless or perfect fluids, the other treating of viscous or imperfect fluids. The frictionles fluid has no existence in nature, but is hypothesized by mathematicians in order to facilitate the investigation of important laws and principles that may be approximately true of viscous or natural fluids