导流隧洞出口消力池体型优化数值模拟与试验研究

通过对新疆阿尔塔什水利枢纽工程导流洞水工模型泄流实验与数值模拟,对出口消力池进行了体型优化,在消力池水面线、消能率、出池最大临底流速、尾渠流态等方面与原方案进行了对比分析。结果表明:在实验范围内,优化后的消力池内最大水深降低了2.05 m,消能率提高了12%,出池最大临底流速降低了28%,尾渠稳定流速降低了66.7%。通过各项水力特性指标表明,优化后的消力池比原设计方案显现出更为优良的特性。

Experiment and numerical simulation of stilling pool shape optimization at diversion tunnel outlet

Through numerical simulation and model test on diversion tunnel discharge of water conservancy project in Aertash of Xinjiang,the paper optimized the shape of stilling pool, and compared water level line, energy dissipation, the maximum underflow speed and the flow pattern of tailwater canal of the optimization scheme with that of original design scheme. The results show that after the optimization, the maximum water depth decreased 2.05 m in the stilling basin, the energy dissipation ratio increased by 12%, the maximum underflow velocity reduced by 28%, and the velocity in tailwater canal decreased by 66.7%.The hydraulic characteristics indicators show that the stilling pool after optimization performs a better characteristics compared with that of the original design scheme.