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本文介绍了采用三维粒子动态分析仪（PAD）对一径流式涡轮增压器的涡轮无叶蜗壳出口速度分布的测量结果，给出了切向和径向速度以及气流角沿圆周方向的分布，分析了不均匀分布特性对向心涡轮效率的影响。
In this paper, the measurement results of the velocity distribution at the outlet of a turbine turbocharger turbine with a three-dimensional particle dynamic analyzer (PAD) are introduced. The tangential and radial velocities and the distribution of the gas flow angles in the circumferential direction are given The effect of uneven distribution on the efficiency of radial turbine was analyzed.