第36卷第5期 2010年10月
火箭推进
JOURNAL OF ROCKET PROPULSION
Vol.36, No.5 Oct.2010
真空环境下液体射流雾化特性的实验研究
李龙飞，池保华，杨伟东，洪流(西安航天动力研究所，陕西西安710100）
摘要：为研究真空环境下液体的雾化特性及其影响因素，建立了真空环境喷雾实验系统。用水模拟液体推进剂，真空环境舱的初始真空度小于10Pa，采用高速动态分析系统测量了喷雾场。结果表明，真空环境下液体射流的闪蒸是其破碎与雾化的主要因素之一；喷射速度较低时喷口发生结冰现象；随着喷射雷诺数的增大，破碎长度变长而雾化锥角减小；喷射速度相同时，喷嘴直径增大，破碎长度和雾化锥角随之增大。
关键词：真空环境；空间火箭发动机；雾化特性；闪蒸
中图分类号：V434.3-34
文献标识码：A
文章编号：(2010)05-0027-04
Experimentalstudyonatomizationcharacteristic
ofliquidjetinvacuumenvironment LI Long-fei, CHI Bao-hua, YANG Wei-dong, HONG Liu(Xi'an AerospacePropulsion Institute,Xi'an710100,China）
Abstract: In order to study the atomization characteristic and its influence on liquid jet in vacu-um, an experimental system was built, in which water was used instead of the liquid propellant, the initial vacuum degree in the vacuum cabin was lower than 10 Pa, and the high-speed dynamic analysis system was adopted to measure the atomization. The experimental results show that the flashing of the liquid jet in vacuum environment is one of the main factors for atomization of liquid jet, the icing phe-nomenon occurs on the edge of injector as the jet velocity is low, the length to break up increases and the spray angle decreases with the increase of the liquid Reynolds number in vacum, and while the jet velocity is same, the larger the diameter of nozzle orifice is, the longer the length to break up will be and the more the spray angle will become.
Keywords:vacuum environment; space rocket engine atomization characteristic; flashing
0引言
真空环境下液体在喷射过程中会发生闪蒸，
收稿日期：2010-09-21；修回日期：2010-10-12 基金项目：总装备部预研项目
带走热量并可能结冰。这对于载人飞船，排放废水若结冰会堵塞喷口，恶化宇航员的生活质量：对于液体空间火箭发动机，会影响点火过程。参
作者简介：李龙飞（1977一)，男，高级工程师，研究领域为喷募燃烧万方数据