模型三组元喷嘴雾化SMD变化规律

为了充分研究新型三组元喷嘴的内混腔雾化特性 ,设计了模型喷嘴进行多工况试验。试验发现 ,维持气体或液体压降不变 ,改变另一种介质的压降 ,会得到不同的雾化平均直径随气体压降或液体压降 ,以及气液比ALR的变化曲线 ,这些曲线有着明显的规律。大量试验表明 ,虽然平均直径SMD随气体压降或液体压降的变化曲线明显不同 ,但其随气液比的变化规律却趋于相同

Variation of SMD for Atomization of Model Tripropellant Injectors

In order to study completely the atomization characteristics of mixing cavity of the designed new type tripropellant injectors, model injectors are designed for experiments under multiple operating conditions. Through experiments it can be seen that different curves of regularity for variations of SMD along with pressure drop of gas as well as mass ratio of gas to liquid ALR will be gain if the pressure drop of liquid remains constant while transform the pressure drop of gas. So do the other case only transforming the pressure drop of liquid. Moreover, these curves show the regularities. A great deal of experiments indicate the curves of average diameters SMD along with mass ration of gas to liquid ALR have the same trends although obvious differences exist between curves that SMD along with pressure drop.