抽水蓄能电站渐扩形衔接对称岔管水流阻力特性试验研究

结合江苏宜兴抽水蓄能电站钢岔管试验研究任务，利用图像显示技术定性地观察了岔管内的水流情况，在含弯道和岔道的试验段前后断面旧测压强差，通过水头损失分析，对含弯道的渐扩形衔接对称岔管的水流阻力特性进行了研究，结果表明在双机发电，单机发电、双机抽水和单机抽水等不同运行工况下水流进入阻力平方区的临界诺数是不同的，给出了相应的临界雷诺数阻力平方区的局部损失系数。

Experimental research on current resistant characteristics of symmetric fork tube in the pumped-storage hydroelectric plant

Linking with experimental task for research on fork tube of Yixing pumped storage hydroelectric plant,water flow in the fork tube was observed qualitatively by image display technology.At the same time,the measurement was made in the sections including curve tube and fork tube and experimental research on current resistant characteristic was done for gradually expanding symmetric fork tube by analyzing water head loss.The results showed that critical Reynolds Numbers are different under the conditions of generating electricity of double machines,generating electricity of single machine,pumping water of double machines and pumping water of single machine.The critical Reynolds numbers and local loss coefficients are given.