摘要
采用VOF法,运用RNG k-ε双方程紊流模型对台阶式溢洪道的水面线、流场、速度场等进行三维数值模拟。研究结果表明:水面线在能量交换过程中受台阶影响先升高再降低;台阶断面上的流速分布符合明渠水流规律;受水体拖拽力和台阶的影响,台阶上的水流分为滑移流和涡旋流两种。通过数值计算和水工试验发现模拟结果与模型试验结果基本相近,说明建立的数学模型及设置的参数模拟台阶式溢洪道的水流特性是可行的。
Direct with the RNG k-ε double-equation turbulence mode,which was introduced by the method of VOF,3D numerical simulation were conducted to simulate free surface,flow field,velocity distributions of stepped spillway. The results show that free surface increased at first and then decreased because the effect of step when energy exchange; velocity distribution law of sidestep section accord with open channel flow; water flow was divided into two flow state which were slip flow and vortex flow because the influence on water drag force and step. Through the numerical calculation and hydraulic test found that simulation results and test results were basically identical,the paper show that mathematical model and parameters is feasible to simulate flow characteristics of stepped spillway.
出处
《黑龙江水利科技》
2016年第8期3-7,共5页
Heilongjiang Hydraulic Science and Technology
