一、前言 轴流无叶喷嘴透平级是一种新型透平机械,不少文献已进行了实验研究及理论分析,并指出这种透平级一系列优点,肯定了其工业实用价值。但由于对实验数据分析及对流动规律认识诸方面的不足,使得至今这种透平的设计方法不完善,很多现象不清楚。本文通过实验,对三套具有不同出口倾角的无叶喷嘴型线进行了研究比较,分析了级间参数分布规律,对完善这种透平级的设计方法有一定参考价值。 I. Introduction Axial non-leaf nozzle turbine level is a new type of turbine machinery, many literatures have carried out experimental research and theoretical analysis, and pointed out that a series of advantages of the turbine level, affirmed its industrial practical value. However, due to the lack of understanding of experimental data and understanding of the laws of flow, so far the design method of such a turbine is not perfect, and many phenomena are not clear. In this paper, three sets of non-leaf nozzle profiles with different exit inclination are studied and compared through experiments. The distribution rules of the interstage parameters are analyzed, which has certain reference value for the perfection of the design method of this kind of turbine.