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介绍利用粒子动态分析仪（ＰＤＡ）在冷态试验中研究了高速射流对两相流中颗粒滞止浓缩过程的影响，首次证明了滞止浓缩过程的存在。试验结果表明，加入高速射流有利于颗粒的滞止浓缩。
The effect of high velocity jet on the particle stagnation and concentration process in two-phase flow was studied by using particle dynamic analyzer (PDA) in cold state test. The existence of stagnation and concentration process was first proved. Experimental results show that the addition of high-speed jet is conducive to particle stagnation concentration.