The paper applyed principle analysis and numerical computation to compare the scheme of particle injection syphon and convergence - turn tube . the last method was adopted to conduct research because it could produce high concentrated particles stream and operated conveniently . 2 本文应用原理分析、数值计算等手段，对粒子加入、弯管和收敛?折管方案进行了比较，认为收敛?折管方案可以产生发动机在飞行过载中的凝相粒子聚集效应，且烧蚀参数控制方便。
