水电站进水口漩涡缩尺效应

前人对进水口漩涡进行了大量的试验研究，但关于进水口漩涡试验的缩尺效应尚无统一的观点．笔者针对侧式进水口漩涡进行了一系列模型试验研究．结果表明，按弗劳德准则设计的模型，当模型进水口处的雷诺数RP≥3．4×10^4时，表面张力对漩涡无明显影响，可不考虑缩尺效应．当雷诺数不能满足该要求时，可以采取增大流量的办法消除缩尺效应，而增大的流量的倍数与模型进水口的淹没水深和模型比尺有关．

Scale Effects on Vortex at Hydraulic Intakes

A lot of experimental study on vortex at hydraulic intakes has been done, while no agreement is reached referring to scale effects on modeling vortex, The serial model tests about vortex at side intakes were conducted in this paper. Results show that no significant scale effects on modeling vortex is observed in models operated according to Froude similitude when Reynolds number Re is above 3.4 × 10^4. And when Reynolds number is less than 3,4×10^4, larger discharge can be adopted to overcome the scale effect, and the increase in flow is related to model scale and relative submergence of the intake.