尾坎高度对跌扩式消力池水力学特性的影响分析

Influence Analysis of Tail Sill Height on Hydraulic Characteristics of Drop-Expansion Stilling Basin

摘要:

基于模型试验,研究了入池流量分别为0.027 m3/s、0.033 m3/s下,尾坎高度分别为0.14 m、0.16 m、0.18 m对跌扩式消力池内临底流速、脉动压强、消能效率的影响。结果表明:尾坎高度的改变对跌扩式消力池内临底流速及脉动压强分布规律影响不大,但尾坎高度增加可以减小消力池内最大临底流速、脉动压强,且会降低消力池的消能效率。

Abstract:

Based on model tests, under the inlet discharge of 0.027 m3/s and 0.033 m3/s, the effects of tail sill heights of 0.14 m, 0.16 m and 0.18 m on the near-bottom flow velocity, fluctuating pressure and energy dissipation efficiency in the drop-expansion stilling basin were studied. The results show that the change of tail sill height has little influence on the distribution laws of near-bottom flow velocity and fluctuating pressure in the drop-expansion stilling basin. Increasing the tail sill height can reduce the maximum near-bottom flow velocity and fluctuating pressure in the stilling basin, while lowering the energy dissipation efficiency of the stilling basin.