复杂管段流动压降数值模拟研究  

Numerical Simulation of Flow Pressure Drops for Complex Pipe Segment

作　　者：戚展飞[1] 佟立丽[1] 曹学武[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《核动力工程》2010年第S1期119-122,共4页Nuclear Power Engineering

基　　金：高等学校博士学科点专项科研基金资助课题(20090073110034)

摘　　要：为研究复杂结构管段内引起局部压降的原因,以核电厂中带孔洞的套管为模拟对象,采用计算流体力学(CFD)方法分别对两种不同冷却剂流动方向下管段内的三维单相流动进行了数值模拟。使用混合网格和标准k-ε湍流模型,得到了该管段内的速度场和压力场。结果表明:管段的多孔管壁处,局部的速度流线较为紊乱,产生了涡流,压降较大;不同的流动方向在该管段中产生了不同的压降形式;管道局部流动截面相对于流动方向的改变方式和改变顺序,是产生不同局部压降的重要原因。To study the causes for the local pressure drop,the three-dimension single-phase flow in the complex pipe segment with holes in nuclear power plants was studied with the computational fluid dynamics method under two flow conditions. The hybrid grids technique and standard k-ε turbulence model were applied. The results show that the different forms of pressure drop were caused by different flow directions in the pipe; the local stream line resulting in eddy and pressure changed greatly near the porous liner tube; how and where the cross-sections of flow channel change corresponding to the certain flow direction cause mainly different local pressure drop.

关 键 词：核电厂 复杂管段 计算流体力学(CFD) 数值模拟 

分 类 号：TL334[核科学技术—核技术及应用]