【摘要】 本文报导了低矮喇叭型尾水管h/（D₁）=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/（D₁）=1.6）的效率稍高于4H弯型尾水管（h/（D₁）=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。更多还原

【Abstract】 In this paper, the experimental research work performed on the hydraucone type draft tubeh/D1 = 1.6 is reported.The efficiency experiments and measurement of velocity fields were made on three draft tube models(two hydraucone and one elbow type). Detailed description of the influence of stay blades and the central cone is given in this paper. The experiments show that the efficiency of the hydraucone tube (h/D1=1.6) is0.6- 0.7% higher thanthe 4H type elbow tube (h/D1=2.5)The condition of flow at the inlet and exit of the hydraucone and the elbow type draft tube was measured with five-hole pitot probes. Measurement results indicate that the distribution of velocities at inlet and exit of the hydraucone tube is comparatively more uniform than the4H tube. Analyses of the experimental results are also presented.更多还原