关键词: 推进剂雾化;液滴;粒度分布;液体推进剂火箭发动机

Abstract: According to the characteristics of the liquid film formed initially from jet-impinging atomization, a analytic formula of droplet size distribution function was deduced in a polar coordinate with polar angle as argument. Different from the typical Rosin-Ramller distribution and upperlog normal distribution, this kind of distribution function can be used to calculated the Sauter Mean Diameter of droplets in any polar angle regions produced by two impinging jets or splash atomization at any impinging angle. The calculation results show that the Sauter Mean Diameter decreases monotonically with the increasing of the impinging angle. The calculated curves of the Sauter Mean Diameter are given when one of the three factors, jet diameter, jet velocity and jet temperature, changes. Atomization mechanism of the injector element of a new generation of liquid rocket engine platelet injectors was also analyzed.

Key words: Propellant spray;Drop (liquid);Particle size distribution;Liquid propellent rocket engine