摘要
对单边膨胀喷管(SERN)型面进行非线性缩短设计,采用CFD技术分析了非线性缩短SERN性能。与理想喷管、线性缩短理想喷管性能对比发现:非线性缩短理想喷管的推力性能优于直接线性缩短理想喷管;NPR较大范围内,较理想喷管推力性能下降很小,最好时不足0.04%。非线性缩短SERN设计方法应用于截短理想喷管并与RAO喷管推力性能对比发现:完全膨胀时推力性能较RAO喷管只低0.7%;严重过膨胀状态NPR=40时,推力性能较RAO喷管高15.6%。
A procedure of nonlinearly compressed Single Expansion Ramp Nozzle（SERN） profile to cut down nozzle length was described. Comparisons were made among perfect nozzle, linearly compressed perfect nozzle and nonlinearly com- pressed perfect nozzle. The results show that the performance of nonlinearly compressed perfect nozzle is superior to linearly compressed perfect nozzle, and is inferior little to perfect nozzle. Another comparison is made between nonlinearly compressed truncated perfect nozzle and RAO nozzle, which shows that thrust ratio of RAO nozzle is 0.7% superior when flow is fully ex- panded. Under seriously over-expanded conditions（NPR = 40） ,thrust ratio of nonlinearly compressed truncated perfect nozzle is 15.6% higher than that of RAO nozzle.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2012年第6期951-955,共5页
Journal of Propulsion Technology
