带旋流杯的模型回流燃烧室主燃孔射流研究.pdfVIP

22 7 V ol. 22 No. 7 2007 7 Journal of Aerospace Power July 2007 : 2007) 07114 805 孟江涛, 黄 勇, 郭志辉, 许 旭 ( , 1000 83) : 300 kPa, 25% . , , , ; , ; , L D ( L/ D) 05 , L/ D 13 . : ; ; ; ; ; : V231. 2 : A Research on primary j et of a reverse flow combustor model with swi rl cup M EN G J angtao, H U A N G Y ong, GU O Zhhu , X U Xu ( School of Jet Propuls on, Be j ng Un vers ty of A eronaut cs and A stronaut cs, 100083, Ch na) Abstract: T he character st cs of pr m ar y jets and ts eff ect s on t he v elo c t y f eld of re v erse f low co mbusto r model, w h ch pr mar ly compr s ng an ax alrad al sw rl cup and a pr m ar y ho le w th cool ng a r, w as st ud ed exper ment ally n t he case o f operat ng pr essure of 300Kpa and pressur e lose of com bu sto r of 2. 5% . T he result s show t hat, t he a r nt ake d r ec t on of pr mary jet s nto the rev er se flow combu st or d f fers fro m t hat of st ra ghtf low com bu st ors , nam ely, t he nner jet s ncl ned t o dow nst ream d rect on , and t he o ut er jets ncl ned t o up st ream d rect on . T he penet rat on of t he pr mary jet s s v ery deep t o reach alm ost t he oppo s te l ner w all. A nd, t he lengt h of t he r ec rculat on z one s short ened rem arkably, w t h L/ D ( leng th t o d amet er of sw rl cup) abo ut 0. 5D , and L / D of t yp cal str a g htflow com bu st or a bout 1. 3. Key words: aero space pr opuls o n sy st em ; revers f low combu st ors ; sw r l cup; pr m ar y ho les ; v elo c