典型二元高超声速进气道设计方法研究

Study of design method of typical two-dimensional hypeisonic inlet

综合了一系列典型二元高超声速进气道的设计和性能估算方法,给出了可行的设计原则.在满足流量、增压以及工作范围(起动性能和反压承受能力)的条件下,给出了进气道进口、外压波系、内压缩通道、唇罩及隔离段的设计方法.采用此方法,以H=22800 m、Ma0=6为设计点,完成了一高超声速进气道的初步设计,并估算得到了进气道性能参数、进气道的起动马赫数和反压承受能力,对比CFD计算结果,误差不大.通过该方法得到的进气道具有结构简单、流量系数大、压缩损失小的特点,不通过优化即可得到性能较为良好的模型.

A feasible design principle was developed by combining a series of design and performance predicting methods of typical two-dimensional hypersonic inlets. The design methods of inlet entrance, external compression shocks, internal contraction tunnel, cowl and isolator were presented at the given flux, pressure rise ratio and working range （starting Mach number and capability of enduring back pressure）. A preliminary design of hypersonic inlet at the design point of H=22 800 m, Ma0 =6 was conducted, so the performance parameters （pressure rise ratio, Mach number, temperature rise ratio and total pressure recovery）, starting Mach number and capability of enduring back pressure were predicted and calculated with small error. With this method, the inlet could present simple construction, high flow coefficient and low compression loss in developing a satisfactory model without optimization.