激波与涡对相互作用的实验研究

EXPERIMENTAL STUDY OF THE INTERACTION BETWEEN SHOCK WAVES AND VORTEX PAIR

在方截面激波管中进行了平面运动激波和涡对的二维相互作用实验，研究了激波与同向涡对、激波与反向涡对相互作用的非定常过程．根据实验照片，分析讨论了作用过程中激波的变形，二次激波和三波点的形成、演变，激波与激波的相互作用，以及旋涡结构的变化等．实验表明，激波通过涡核时，激波发生剧烈变形，旋涡强度增大，涡核形状改变．

Experiments on two:dimensional interactions of plane moving shocks with counter- and co-rotating vortex pairs were conducted in a shock tube with a square crosssection. The unsteady procedure of the interaction between shocks and vortex pairs was studied. The distortion of shock surface, forming of secondary shock and tri-point and interaction of shocks were discussed. The results show that the shock wave is distorted very much, strength of vortex is increased and shape of vortex core is changed, during the interactions.