摘要
对多种紊流模型的优缺点进行比较后,选择了标准的k-ε紊流模型模拟高水头下水库无压泄水洞水流,计算结果与物理模型试验结果吻合较好。在数值计算中,采用了有限体积法离散微分方程组,离散方程时采用了交错网格技术;求解离散方程时则采用了交替方向迭代技术(ADI法),并采用了目前较为流行的SIMPLE计算程式,以保证数值计算的稳定性和精确性。为了加快收敛的速度,采用了欠松弛技术和源项线性化,对特殊的边界条件进行了处理。
Finite Volume Method is appilied in numerical modeling of the flow in no-pressure tunnel of high water-head reservoir in this paper. The author selects standard k-ε turbulence modeling by weighted poly-turbulence modeling through the comparison of numerical results and model experiment results, there is very good inosculation. The staggered grid system is used in the derivation of discretized equations and the Alternating Direction Implicit Method is appilied in equations caculation in this paper.In order to ensure stability and accuracy of numerical calculation, this paper adopt Semi-Implicit Method for Pressure-Linked Equations that is very popular so far. In order to quicken styptic velocity,under-relaxation and source term linearization is appilied. At the same time, special boundary conditions are dealt with.
出处
《水力发电》
北大核心
2004年第4期28-31,共4页
Water Power
基金
新疆水利水电工程重点学科基金项目资助.
关键词
紊流
数值模拟
有限体积法
无压泄水洞
高水头
水库
turbulent flow
numerical modeling
finite volume method
non-pressure tunnel
high head
reservoir
