摘要
为了研究膨胀偏流喷管高度补偿性能,采用CFD方法,对环喉式(ATEDN)和分散式(DTEDN)膨胀偏流喷管在不同高度的工作状态进行了研究,分析了高度变化对膨胀偏流喷管性能的影响和膨胀偏流喷管的高度补偿机制。结果表明:在工作高度0km～15km内,膨胀偏流喷管推力系数优于传统喷管,具有自动补偿能力,其工作模态是从低空"开放"模态转换到高空"闭合"模态。环喉式膨胀偏流喷管性能优于分散式膨胀偏流喷管,其中心体尾锥角、收敛角和初始角存在最优角度,分别为70°,5°和65°,其中收敛角对性能影响较小。对于分散式膨胀偏流喷管,喉孔数目为6喉孔的喷管高度积分总冲比4喉孔的喷管高1.94%;采用带状喉孔的喷管高度积分总冲比圆孔喉口的喷管高3.47%。
In order to study the altitude compensation effect of the expansion-deflection nozzle,the working condition at different height of annular throat expansion-deflection nozzle(ATEDN)and the discrete throat expansion-deflection nozzle(DTEDN)were calculated by CFD method.The result shows that in the height range of 0 km^15 km,two kinds of expansion-deflection nozzles automaticly have ability of compensation,and better than the traditional nozzle.The operating mode is converted from the low altitude ’open’ mode to the ’closed’ mode.The performance of ATEDN is better than DTEDN.For the ATEDN,the optimal angel of cone tail angel,convergent angle and initial angle is 70°,5°and 65° respectively,and the convergent angle has no obvious influence on the performance of the nozzle.For the DTEDN,the specific impulse integration of height of the nozzle with 6 throats is 1.94% more than that of nozzle with 4 throats.The specific impulse integration of height of DTEDN which uses zonal holes is 3.47% more than which uses circular holes.
作者
张琦
李明肤
王革
李冬冬
张莹
赵明阳
ZHANG Qi;LI Ming-fu;WANG Ge;LIDong-dong;ZHANG Ying;ZHAO Ming-yang(College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2019年第1期44-52,共9页
Journal of Propulsion Technology
关键词
膨胀偏流喷管
高度补偿
数值模拟
工作模态
Expansion-deflection nozzle
Altitude compensation
Numerical simulation
Working mode
