CAJ | 학술논문

超声速进气道存在双尖楔结构，在非设计工况下，可能出现马赫反射现象。利用激光能量注人流场产生等离子体，可以改变马赫反射结构，降低马赫杆高度，甚至使马赫反射完全转变为正规反射，达到减少总压损失的目的。基于这种方法，本文在等离子体区域形状和激光能量相同的情况下，计算了马赫数为3．45时，不同的激光能量注入位置对双尖楔简化模型形成的马赫反射结构的影响。计算结果和分析表明，适当增大激光能量注入位置与马赫杆的距离，并减小其与上游斜激波的距离，将有助于降低马赫杆高度，提高激光能量对马赫反射结构的控制效果。
초성속진기도존재쌍첨설결구，재비설계공황하，가능출현마혁반사현상。이용격광능량주인류장산생등리자체，가이개변마혁반사결구，강저마혁간고도，심지사마혁반사완전전변위정규반사，체도감소총압손실적목적。기우저충방법，본문재등리자체구역형상화격광능량상동적정황하，계산료마혁수위3．45시，불동적격광능량주입위치대쌍첨설간화모형형성적마혁반사결구적영향。계산결과화분석표명，괄당증대격광능량주입위치여마혁간적거리，병감소기여상유사격파적거리，장유조우강저마혁간고도，제고격광능량대마혁반사결구적공제효과。
In an off design condition, Mach reflection probably appears when a supersonic flow goes through the double wedges, which usually, exist in a supersonic inlet. The height of Mach stem can be reduced by laser energy deposition into the air. In some cases, the Mach reflection transits into regular reflection via laser energy deposition. Laser- induced plasma helps reduce total pressure loss. The influence of laser energy deposition on Mach reflection was studied at invariable shape and laser energy. A series of numerical simulation for the influence of laser energy deposition location on Mach reflection showed that, at Mach number 3.45, a proper increase of distance between energy deposition location and Mach stem would reduce more height of Mach stem. Less distance between energy deposition location and upstream oblique shock waves also had a good effect on reducing the height of Mach stem.