大密封压比超音速自由旋气动窗口设计与试验研究

Design and experiment of high pressure-ratio free-vortex aerodynamic window

介绍了横向超音速自由旋气动窗口设计方法,分析了单级气动窗口难以实现大密封压比的原因。针对气动窗口扩压器入口气动参数分布特点,提出了一种扩压器带端壁吹气的气动窗口设计方案并进行了试验验证,气动窗口密封压比达到了85。结果表明:扩压器入口端壁吹气是一种有效提高气动窗口密封压比的技术措施,内端壁吹气对密封压比影响较大,外端壁吹气对密封压比影响较小。

Design ideas of supersonic transverse free-vortex aerodynamic window（ADW） were discussed, and the reason of a single-stage ADW not easily reaching high sealing pressure ratio was analyzed. Based on the pneumatic parameter distribution at the ADW diffuser inlet, an active diffuser with wall boost was designed and validated by tests, whose sealing pressure ratio reached 85 in the test. The results show that the air blowing in diffuser inlet is an efficient method for improving sealing pressure ratio; the blowing in the diffuser＇s inner wall has more impact on sealing pressure ratio than that in the outer wall.