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为了探索弯曲激波压缩流场性能所能达到的范围,分别在无粘和粘性条件下,通过多目标优化设计和抽样计算获取了高性能弯曲激波压缩方案,并与传统的压缩方式进行了对比。研究结果表明:(1)无粘条件下流场多目标优化Pareto最优解集中存在长度、压缩效率、低马赫数流量系数等性能参数均优于等激波强度三楔压缩的方案;(2)粘性条件下压比均为8.29(1±0.5%)时,弯曲激波压缩流场与等熵压缩流场相比,长度缩短了35%;与等激波强度三楔压缩流场相比,长度缩短了8%,总压恢复系数大小相当,来流马赫数4时流量系数高6%;与斜楔-等熵压缩相比,总压恢复系数仅相差1.1%,而来流马赫数4时流量系数提高了6%;其出口截面附面层厚度、附面层形状因子均低于其他压缩方式。
In order to explore the range that flow field of bending shock can reach, high-performance bending shock compression scheme is obtained by multi-objective optimization design and sampling calculation respectively under the conditions of non-stick and viscous, and compared with the traditional compression method Compared. The results show that: (1) The performance parameters of flow field multi-objective optimization Pareto optimal solution, such as length, compression efficiency, low Mach number flow coefficient, ) Viscous conditions are 8.29 (1 ± 0.5%), the length of bending shock compression flow field is 35% shorter than that of isentropic compression flow field. Compared with the three-wedge compression flow field , The length is shortened by 8%, the total pressure recovery coefficient is equal, the flow coefficient is 6% higher when the Mach number is 4, and the total pressure recovery coefficient is only 1.1% less than the wedge-isentropic compression, while the Mach number 4 flow coefficient increased by 6%; the outlet section thickness of the cover layer, surface layer form factor are lower than other compression methods.