摘要
基于标准的k—ε双方程紊流模型，采用SIMPLEC算法，在贴体坐标系下，通过求解三维雷诺平均的Navier—Stokes方程，对半圆形和蜗形两种钟形进水流道吸水室内部流动进行了大量数值模拟，并在流场数值模拟的基础上对这两种吸水室的后壁距进行了研究，给出了具有较好流场以及出口流速均匀度的后壁距范围和最优值：半圆形吸水室后壁距Xr=（0．8—1．2）D0，蜗形吸水室后壁距Xr≤1．3D0，最优值均为最大值。
Based on the standard k -e model , the three-dimensional Navier-Stokes equation is solved with SIMPLEC algorithm in the body-fitted curvilinear coordinate for internal flow through the semicircular and volute suction casing of the bell-like inlet passage of the mixed-flow pump;in the light of which the distance of back-wall of suction casing are hydraulically optimized and the common bound and the optimum distance of back-wall are given in this paper. For a fluent flow field and a high uniformity of the velocity on the outlet section , the distance of back-wall of semicircular suction casing should satisfies Xr = （0.8 - 1.2） Do （XT is the distance of back-wall ） ;the distance of back-wall of volute suction casing should satisfies XT ≤ 1.3 D0, and the opti- mum is the maximal.
出处
《流体机械》
CSCD
北大核心
2008年第3期15-18,共4页
Fluid Machinery
基金
“十五”国家重点技术装备研制科技攻关项目(ZZ02-03-01-02)
关键词
进水流道
后壁距
数值模拟
inlet passage
distance of back-wall
numerical simulation
