【作者】 陈敏； 刘明月； 张志国； 王先洲；

【Author】 CHEN Min,LIU Ming-yue,ZHANG Zhi-guo,WANG Xian-zhou School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology, Wuhan,430074

【机构】 华中科技大学船舶与海洋工程学院；

【摘要】 90°弯管广泛地存在于船舶工业应用领域中。本研究运用FLUENT软件对连续方程和Navier-Stokes方程进行空间离散,结合RNG k-ε湍流模型,对不同Re下圆形截面90°弯管内的流动现象进行数值模拟。研究分析了管内速度和压力分布、二次流现象及其产生机理。引入涡通量衡量不同Re下二次流的强度,得出雷诺数越大,管内流体旋度越大。更多还原

【Abstract】 Piping system is playing important roles in the marine industry,especially 90°bent pipe. The flow under different Re number through a three-dimensional 90°bend pipe is simulated numerically with the aid of RNG k-εturbulence model,which had been well validated for high screwed curvature flow.The results show the pressure and velocity distribution,and the secondary flow downstream of the bend are found.The research on the strength of secondary motions under different Re number is presented.With increasing Re number,the vortex flux will be bigger,and the swirling motions are stronger.更多还原