隔离段对二维混压式进气道出口参数的影响

Effects of the isolator on the exit parameters of two-dimension inlet

利用Fluent仿真软件,对二维混压式高超音速前体/进气道在设计状态和非设计状态下的性能和流场进行了计算。分析表明,进气道在设计状态下的性能得到了明显的提高。同时,有无隔离段以及隔离段长度对进气道出口参数的影响,文中进行了初步的分析,结果表明:有无隔离段以及隔离段长度对进气道出口总温没有太大的影响;隔离段较短时,进气道出口总压比无隔离段小,但当隔离段长度增大到一定值后,进气道出口总压比无隔离段大;隔离段较短时,进气道出口马赫数比无隔离段大,但当隔离段长度增大到一定值后,进气道出口马赫数比无隔离段小。

The performances and flow fields of two-dimensional hypersonic forebody/inlet at design and under-design conditions are calculated through fluent simulation software. Analyses show that the performance of the inlet at design condition is improved obviously. Meanwhile, the effects of the existence and length of the isolator are also analyzed primarily. Results show that： isolator has little effect on total temperature of the inlet exit; when the length of isolator is shorter, the total pressure of the inlet exit is lower, but when the length of isolator is longer enough, the total pressure of the inlet exit is higher; when the length of isolator is shorter, the Ma number of the inlet exit is ,higher, but when the length of isolator is longer enough, the Mach number of the inlet exit is lower.