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介绍一种新式矩阵喷嘴的实验结果。设计这种喷嘴的目的是为在超音速空气流中,由壁面喷射氦而产生旋涡相互作用以达到强化掺混。在2种喷射压力下Ma=1的氦气喷入Ma=3的空气主流中,实验数据包括氦浓度和总压损失。发现矩阵喷嘴在431kPa下喷射氦其掺混率优于顺喷单孔喷嘴(喷射角为15°和30°),在轴线处矩阵喷嘴的总压损失也低于单孔喷嘴。
The experimental results of a new type of matrix nozzle are introduced. The purpose of designing such a nozzle is to create a vortex interaction in the supersonic airflow that ejects helium from the wall to achieve intensive blending. The helium gas with Ma = 1 at two injection pressures was injected into the main flow of air with Ma = 3 and the experimental data included helium concentration and total pressure loss. It was found that the matrix nozzle sprayed with helium at 431 kPa had better mixing rate than the nozzle with single nozzle (spray angle of 15 ° and 30 °). The total pressure loss of the matrix nozzle at the axis was also lower than that of the single nozzle.