ニ次元移動ノズルまわりの吸引圧力

This paper presents some results obtained from the simulation of a two-dimensional impulsively started jet with the nozzle moving in the direction of jet. The simulation is executed with a discrete vortex method. The vortex patterns obtained show that the vortices of jet flow are captured by means of moving the nozzle and a large stationary concentrated vortex is formed near the nozzle exit. The concentrated vortex generates high suction pressure around the nozzle exit, so that we may expect the reduction of parasite aerodynamic forces by using this suction pressure.