国防科技大学学报2017，Vol.39Issue(3)：1-6,6.DOI:10.11887/j.cn.201703001
预冷却引射系统性能一维分析
One-dimensional analysis for performance of ejector with precooling
摘要
Abstract
According to the one-dimension design theory of ejector,cooling the secondary flow before it enters into the mixing chamber can promote the eject efficiency and increase the eject coefficient,but flow loss is brought with the addition of precooler,so the performance evaluation of ejector is necessary.Looking on the eject system with precooler,the effect of precooler on the performance of system was analyzed through the one-dimension theory,and the effects of the intensifying effect of precooling and the weakening effect of resistance on eject efficiency were analyzed emphatically.The research results indicate that:the precooler brings intensifying effect of precooling and weakening effect of resistance to eject system,and the cross section area and heat transfer area of the precooler are the dominating factors;cross section area of the precooler has a critical value,when the cross section area is bigger than the critical value,the eject performance improves with the increase of heat transfer area,otherwise it worsens;the eject performance of the equivalent preasure mixing scheme is better than that of the equivalent area mixing scheme,the eject coefficient of the former is 60％ higher than the latter;precooling improves the eject performance effectively,especially for the equivalent area mixing scheme,the performance is improved by 35.5％.关键词
一维分析/预冷增强/流阻减弱/临界横截面积Key words
one-dimensional analysis/intensifying effect of precooling/weakening effect of resistance/critical cross section area分类
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张建强,王振国,李清廉,徐万武,邹建军..预冷却引射系统性能一维分析[J].国防科技大学学报,2017,39(3):1-6,6.基金项目
新世纪优秀人才支持计划资助项目(NCET-13-0156) （NCET-13-0156）
