本文采用三孔和五孔探针在三个不同工况下对一高效离心式压缩机三元叶轮出口及其无叶扩器内部流场进行了详细测量和分析,给出了三个不同径向位置上速度场和压力场跨盘、盖的分布曲线。本文测量结果表明即使是高效三元叶轮,其出口气流角跨盘、盖分布仍很不均匀,只有采用三元叶片扩压器才能更好地与叶轮匹配。 In this paper, three-hole and five-hole probe in three different conditions for a high efficiency centrifugal compressor three yuan impeller outlet and its non-leaf expander internal flow field were measured in detail and given three different diameter To the location of the velocity field and pressure field across the plate, cover the distribution curve. In this paper, the measurement results show that even the highly efficient three-element impeller, the outlet airflow angle across the disk, the cover is still very uneven distribution, only the use of three yuan vane diffuser in order to better match with the impeller.