喉道肩点圆弧半径对高超声速进气道性能的影响  

Impact of radius of isentropic expansion arc surface on the hypersonic inlet

作　　者：刘蕾 郭雪岩[1] LIU Lei;GUO Xue-yan(School of Energy and Power Engineering,University of Shanghai for Science and Technology, Shanghai 200093, Chin)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《能源工程》2017年第6期20-27,31,共9页Energy Engineering

摘　　要：对某型二维高超声速进气道进行了数值仿真计算,研究了设计工况和非设计工况喉道肩点圆弧半径对进气道性能的影响。结果表明,在设计工况下,对喉道肩点圆弧处理可以有效提升进气道性能,圆弧半径R=120 mm时性能最佳,总压恢复系数最高可提升4.2%,阻力系数最高降低8.1%。在非设计工况下,喉道肩点圆弧处理对进气道性能有一定提高作用,但随着马赫数的减小,圆弧处理对进气道的性能提升作用降低。Numerical simulation of a 2D hypersonic inlet was carried out at design and off-design operating conditions respectively,and the influences of radius of isentropic expansion arc surface on the hypersonic inlet were investigated.The results showed that the isentropic expansion arc surface could improve the performance of hypersonic inlet effectively.The total pressure recovery coefficient could be increased by 4.2% and the drag coefficient decreased by 8.1% under design conditions when the R = 120 mm. At the off-design conditions,the isentropic expansion arc surface could provide some improvements on the performance of hypersonic inlet,and with the decrease of Mach number,improvements on inlet performance weakened.

关 键 词：高超声速进气道 数值模拟 喉道肩点 总压恢复系数 圆弧处理 

分 类 号：TB126[理学—工程力学]