Abstract
When the propagating shock wave in the shock tunnel reaches at the supersonic nozzle settled at the tube end,the supersonic jet is momentarily formed.As the shock wave propagates intermittently in the shock tunnel,the pulse jet is formed from the supersonic nozzle.The pulse jet has a different feature in comparison with the continuously jet.But,it seems that the characteristic of the pulse jet have to be more cleared to apply for industrial field.This paper aims to investigate the characteristic of the pulse jet by the experiment.The measurement of a pressure fluctuation in the shock tunnel caused by the propagating pressure wave and the flow visualization of the pulse jet are accomplished using the high-speed video camera and the pressure transducer.From the experimental results,the effect of the initial pressure ratio of the shock tunnel for pulse jet is discussed.
