高超声速二元进气道顶板移动变几何方案数值模拟

针对一种工作于马赫数Ma=4~6范围内的高超声速二元进气道,探索了一种进气道部分压缩顶板可移动的简单变几何方案,利用数值模拟研究了接力点变几何进气道的自起动性能和Ma=4~6的调节方法。结果表明:部分压缩顶板可移动简单变几何进气道方案在Ma=3.7能够实现自起动;变几何所形成的自适应放气槽放气量很小,最大放气量在2%以内,关闭自适应放气槽接力点Ma=4流量系数达到0.77;在整个工作范围内流量系数较高、总体性能较优,该变几何方案的调节方法是切实可用的。

Numerical Simulation of a Variable Geometry Hypersonic 2D Inlet Designed with Compressible Ramp Movable

This paper investigates a variable geometry design with partially compressible ramp movable to simulate a hypersonic two-dimensional(2D) inlet working from Mach number Ma=4-6.The inlet self-starting performance at Ma=4 and the adjusting method from Ma=4 to Ma=6 are studied by means of numerical simulation.The results show that the variable geometry inlet self-start can be realized at Ma=3.7,and the discharge capacity of the adaptive bleed slot formed by the variable geometry is below 2%.When the adaptive bleed slot is closed after starting,the mass flow rate reaches 0.77 at Ma=4.This design enables the inlet to possess a high mass flow rate and good performance during the whole working range,and the adjusting method is practical and feasible.