内乘波式进气道与内型侧压式进气道性能分析(英文)

采用内乘波进气道技术设计了一个马赫数6进出口均为矩形的高超声速进气道。设计基于一种优于传统方案的基本流场(ICFC型),使用流面追踪和激波切割方法生成进气道三维造型。为了开展对比研究,选择了典型的侧压式进气道为参照,本文进气道设计马赫数、进口形状、收缩比等都与该侧压式进气道相同。数值模拟结果表明,内乘波式进气道的各项性能参数都不低于侧压式,多数性能(如流量捕获系数、总压恢复系数、动能效率等)比侧压式都有提高。对比设计工况的性能分析也显示内乘波式进气道性能明显优于侧压式,且在所考察的各工况下都能捕获超过91%的来流。研究证明了有效利用三维压缩来进行特定设计的内乘波式进气道是一种性能优秀的定几何高超声速进气道,尤其在改善流量捕获能力方面特别突出。

ANALYSIS OF INTERNAL WAVERIDER INLET AND TYPICAL SIDEWALL COMPRESSION INLET PERFORMANCE

A new internal waverider inlet with a rectangular shape of entrance and exit in front view is designed at Ma = 6.0. The design is based on a better basic flowfield ICFC than traditional one and derived with the technology of stream tracing and shock cutting. Comparison between the newly designed inlet and a typical sidewall compression inlet is given. The design Mach number and entrance shape of this new inlet are chosen according to the sidewall compression inlet. Numerical results show that most of the performance parameters of the internal waverider inlet are a bit higher than the sidewall inlet, such as the flow capture coefficient, total pressure recovery and the kinetic efficiency. The performances of these two inlets at off-design points are compared. The internal waverider inlet can capture more than 91% of incoming flow under all simulated conditions. Results show that internal waverider inlet using 3-D compression and high flow capture coefficient is a kind of fixed-geometry inlet with better performance.