【作者】 罗兴锜； 逯鹏； 廖伟丽； 郭鹏程； 姬晋廷； 王琪；

【Author】 LUO Xing-qi LU Peng Liao Wei-li Guo Peng-cheng Ji Jin-ting Wang QI (Institute of Water Resources and Hydro-Electric Engineering,Xi’an University of Technology)

【机构】 西安理工大学水利水电学院；

【摘要】 本文采用基于同位网格的 SIMPLEC 算法；应用有限体积法和 RNGK-ε湍流模型,对某电站模型转轮的全流道进行了数值计算,研究了转轮叶片内部流场特点。由于转轮和导叶动静干涉以及叶片数的不一致,活动导叶进口压力波动周期数与转轮进口不一致。小流量工况时,转轮进口水流的撞击, 横向流动以及叶道涡较为严重。当流量增加时,流态得到明显改善。不同开度下,转轮叶片上沿流线方向速度矩也有一定差异。更多还原

【Abstract】 The paper presents the flow flied of X type runner by numerical simulation with passages from spiral case to draft tube.All simulations are carried out with the 3D N-S equation slover based on the nonstaggered grid SIMPLEC algorithm and RNG k-ε turbulence model.Circumferen- tial pressure distributions at runner inlet are different from the ones at guide vane inlet as a result of RSI between runner and guide vane and the different blade number.Under the small discharge,the impact in the head of blade is severe.And there is the flow pattern of cross-flow from hub to shroud.Interblade vortex can also be visible.The flow states are improved with the increase of dis- charge.And there are same discrepancies about V_ur with the opening increasing.更多还原