Effect of Structural Parameters on the Self-oscillating Pulse Jet Device Performance

The pulse jet test device has been developed independently.It was used to test the effect of structural parameters,such as the upper and lower nozzle diameter,cavity length and lumen diameter,etc.on self-excited pulse jet device performance,and other structural parameters on jet strike force when upper nozzle diameter is constant.Studies have shown that under a certain working pressure conditions,the striking force under different lower nozzle diameter will change with the different cavity length,and that under different cavity diameter will change with the different nozzle diameter.Under the different working pressure condition,the laws of jet strike force with the different cavity length under certain nozzle diameter and with the different nozzle diameter under certain cavity length are similar.The jet strike force under certain nozzle diameter almost linearly rises with the increase of working pressure,while there are some differences under different nozzle diameters.Finally,the optimum ranges of structural parameters which have the better influence of the self-excited pulse jet device have been given.This can provide some evidences for further studying the performance of the self-excited pulse jet device.