On the Structure of Pulse Jet

Abstract

Measurements of temporal- and spatial-variations of axial and radial velocity components and pressure have been made together with their fluctuating components in a pulse jet intermittently discharged through an electro-magnetic valve into the still air. and the characteristics of the pulse jet have been examined by comparing the results with those of a steady jet. It was found that half width of the jet and its flow rate per cycle are increased by pulsing and that an increase of flow rate is caused by the large-scale fluctuating components which are generated at the initial period of pulsation.