非对称来流下带后掠斜楔的短隔离段实验研究

为了提高超燃冲压发动机隔离段耐反压能力以及缩短其长度,在前期后掠斜楔数值研究基础上,设计了一种带后掠斜楔的隔离段,斜楔放置在隔离段进口的下壁面上,距隔离段进口长度约15%处,在非对称的隔离段进口来流速度为1.98马赫数的条件下完成吹风实验.实验结果表明,隔离段添加后掠斜楔后的最大承受反压从来流静压的3.55倍上升到3.90倍,提高了9.89%.相同反压下,带后掠斜楔的短隔离段长度缩短了15%.相同长度的带后掠斜楔的隔离段出口平均总压恢复系数由基准隔离段的0.694上升到0.710,提高了2.3%.

Experimental Investigation for Short Isolator with Swept Ramp under Asymmetric Incoming Flow

In order to improve scramjet isolator resistance to back pressure capability and shorten its length,an isolator with a swept ramp is designed.The swept ramp is placed on the lower wall at the isolator entrance and is apart from the isolator entrance about 15 percent of the isolator length.Experiment is conducted in a blow-down supersonic wind tunnel at free incoming flow Mach number of 1.98.Experimental results indicate that the maximum back pressure is improved by 9.89 percent for the isolator with a swept...