摘要
结合大渡河泸定水电站右岸2#泄洪洞出口消力池体型优化试验,在一般浅水垫消力池体型的基础上,提出了一种双浅水垫消力池的新体型。为了深入探究该型消力池的消能机理及其水力特性,采用三维RNGk-ε紊流模型对双浅水垫消力池进行了数值模拟计算研究,并与传统的底流消力池及单浅水垫消力池(跌坎式)的数值计算结果进行了对比分析。结果表明,双浅水垫消力池更能充分发挥浅水垫的"垫层"作用,能有效地降低消力池临底流速,水跃流态更好且稳定,消能效果较佳;同时,消力池底板动水压力分布也更加均匀,对消力池稳定性和安全有利。
A new type of stilling basin with double shallow-water cushions was proposed based on a model for the Luding Hydropower Project. The hydraulic performances of the new type stilling basin such as flow pattern, water surface profile, velocity and pressure distributions were studied by means of numerical simu- lation using 3D RNG k-ε turbulenee model, which are in good agreement with the experimental data. Both numerical and experimental results indicate that the proposed double shallow water cushions can make full advantages of water-cushion to reduce the velocity near the bottom effectively, redistribute the pressure on stilling basin floor, and significantly improve the energy dissipation rate.
出处
《水利学报》
EI
CSCD
北大核心
2012年第5期623-630,共8页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(51079091)
关键词
浅水垫消力池
RNGk-ε紊流模型
数值模拟
消能
stilling basin with shallow-water cushion
RNG k-ε turbulence model
numerical simulation
energy dissipation
