本文报导了低矮喇叭型尾水管h/(D_1)=1.6的试验研究工作,作者对三个模型尾水管(二个喇叭型和一个弯型)进行能量试验和速度场的量测。文中较详细地叙述了喇叭管支柱及中心支对水轮机性能的影响,效率试验表明,喇叭型尾水管(h/(D_1)=1.6)的效率稍高于4H弯型尾水管(h/(D_1)=2.5)。用五孔毕托球量测了喇叭型和弯型尾水管进出口的流动状态。量测结果表明,喇叭型尾水管进出口的流速分布比4H弯尾水管均匀。作者对试验结果作了初步的分析。 This paper reports the experimental research on h / (D_1) = 1.6 for a low-profile trumpet-type draft tube. The authors conduct energy tests and velocity measurements on three draft tubes (two trumpet and one bend). The efficiency of the trumpet type draft tube (h / (D 1) = 1.6) is slightly higher than that of the 4H curved draft tube (h / (D 1) ) = 2.5). With five holes Biyue ball measured horn and curved draft tube import and export flow status. Measurement results show that the horn-shaped draft tube inlet and outlet flow rate distribution than the 4H bend pipe. The author made a preliminary analysis of the test results.