带后续管的渐扩管路内复杂紊流的计算机仿真  

Computer Simulation of Complex Turbulent Flow in a Conical Diffuser with Outlet Pipe

作　　者：何永森[1] 骆坚[2] 卢小勇[2] 

机构地区：[1]湘潭大学,湖南湘潭市411105 [2]湖南大学,湖南长沙410082

出　　处：《矿业研究与开发》2003年第6期48-49,62,共3页Mining Research and Development

基　　金：国家自然科学基金资助项目 (编号 :5 93 75 2 11);湖南省教育厅资助项目

摘　　要：用DLR型K -ε紊流模型及其边界拟合曲线坐标变换法 ,对带后续管 (总扩散角为 8° ,扩散度为 4 )的锥形渐扩管的管路内 ,具有复杂压力梯度 ,充分发展的不可压缩粘性紊流进行了高精度高效率计算机仿真研究。应用实例的入口雷诺数为 2 .93× 10 5和 1.16× 10 5。给出了主流动方向时均速度、紊流动能、雷诺应力和壁面压力系数分布的数值预测结果。应用实例的计算结果与实验结果较好符合。The high-accurate and high-efficient computer simulation of the fully developed incompressible turbulent flow in a conical diffuser with outlet pipe which has a total divergence angle of 8°and an area ratio of 4:1 has been carried out by the DLR k-ε model and BFC method. The Reynolds numbers of the calculated cases at the entry of pipe were 2.93×105 and 1.16×105. This paper gives out the numerical results such as mean velocity in the leading flowing direction, turbulence energy, shear stress, and compares the rate of pressure rehabilitating in a conical diffuser with outlet pipe and one in a conical diffuser without outlet pipes. The calculated results of the examples were well in accord with the ones of the experiments.

关 键 词：紊流场 复杂压力梯度 数值模拟 锥形渐扩管 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]