For the integrated design of the forebody and hypersonic inlet, the non-uniform inflows generated by the forebody have significant impacts on the inlet performance. Traditional inlet designed by the Internal Conical Flow C (ICFC) flowfield or Method of Characteristics (MOC) flowfield, is difficult to match non-uniform inflows, which can easily lead to reduced captured flow and total pressure recovery. Hence, this paper proposes a novel design method for inward-turning inlets to overcome these problems. The key of this method is the parent flowfiled called the Internal Conical Flow N (ICFN). A multi-objective design optimization is integrated into the design of the two-dimensional ICFN flowfield, which enables the “design-optimization” to implement simultaneously. The new ICFN flowfield makes full use of the high compression effect and avoids the existence of Mach reflection at the focal point. Complete details of the design method of ICFN flowfield and inward-turning inlet are presented. The flowfield structure of ICFN flowfield and inlet are analyzed. Numerical simulation results indicate that the new inward-turning inlet can effectively increase captured flow and total pressure recovery. This reveals that the design method gained here can be usefully applied to the design of high-performance inward-turning inlets.

中文翻译：

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非均匀流向内转入口设计新方法

对于前体和高超声速进气道的一体化设计，前体产生的非均匀流入对进气道性能有显着影响。传统的内部锥形流C（ICFC）流场或特征法（MOC）流场设计的入口难以匹配非均匀流入，很容易导致捕获流量和总压恢复降低。因此，本文提出了一种新颖的内转入口设计方法来克服这些问题。该方法的关键是称为内部锥形流 N (ICFN) 的父流场。二维ICFN流场设计中融入多目标设计优化，实现“设计-优化”同时实现。新的ICFN流场充分利用了高压缩效应，避免了焦点处马赫反射的存在。详细介绍了ICFN流场和内转入口的设计方法。对ICFN流场和入口的流场结构进行了分析。数值模拟结果表明，新的内弯入口可以有效增加捕获流量和总压恢复。这表明这里获得的设计方法可以有效地应用于高性能内转入口的设计。