具有二次喷注孔带缩进长度离心式喷注单元流量特性的试验研究

EXPERIMENTAL INVESTIGATION ON FLOW CHARACTERISTICS OF CENTRIFUGAL INJECTORWITH INLET MIXING WITHDRAW LENGTH AND SECONDARY INJECTION

关键词:  火箭推进剂喷嘴  离心喷嘴  流量系数  流量测量

Key words:  Rocket propellant injector  Centrifugal injector  Flow coefficient  Flow ratemeasurement

摘要:

利用自行设计的具有二次喷注孔、带缩进长度的双组元离心式试验喷嘴，对该种结构喷注单元的流量系数进行了测量。研究了喷嘴几何特性值和喷嘴结构参数对流量系数的影响，并对基于动量原理的理想流量系数进行了修正，从而使计算值具有更高的精度。

Abstract:

he problem of combustion instability under high mixture ratio has successfully solvedby using centrifugal injector with inlet mixing withdraw length and secondary injection in preburnerof a certain foreign LRE.The flow characteristics of injector affects the distributing-ratio of oxidizerand combustion instability.This paper has measured the flow characteristics of experiment injectorswith this structure, and given the effects of structure dimensions on flow characteristics.The resultsare important to learn the flow characteristics of injector with this structure and to design centrifugalinjectors.