水利学报2016，Vol.47Issue(2)：139-149,11.DOI:10.13243/j.cnki.slxb.20150495
边界层网格尺度对泵站流场计算结果影响研究
Research for impacts of boundary layer grid scale on flow field simulation results in pumping station
摘要
Abstract
The y+ value on a wall is a primary parameter of boundary layer grid scale, and has important influence on the flow field numerical simulation for pumping stations. In order to clarify the requirements of y+ for different simulation objectives, a realistic pumping station was adopted and evaluated. Considering of meshing difficulty, numerical computation accuracy and efficiency, three kinds of numerical grid schemes were put forward based on the grid independence analysis. The three schemes were named global unstruc⁃tured grid, global unstructured grid with specified boundary layer height, and block structure grid with specified boundary layer, respectively, which result in the corresponding value of y+ 10~2000, 10~1000, 10~500. The results showed little difference in velocity distribution uniformity between scheme 2 and scheme 3. However, scheme 1 was comparatively large difference with the other two schemes. If the macro hydraulic performance of pump station is the main concern, a simple and easy grid scheme (scheme 1) could meet the satisfaction, y+ value could be relaxed appropriately to 0~2000. If the vortex distribution in flow field is the main concern, y+ should be less than 1000, the scheme 2 of gridding should be adopted. If the detailed flow structures, or vortex elimination devices become the main concern, y+ must be within 30~500,and the scheme 3 is the best choice.关键词
泵站/流场计算/边界层网格尺度/漩涡Key words
pumping station/flow field simulation/boundary layer grid scale/vortex分类
水利科学引用本文复制引用
资丹,王福军,陶然,侯亚康..边界层网格尺度对泵站流场计算结果影响研究[J].水利学报,2016,47(2):139-149,11.基金项目
国家自然科学基金项目（51139007）；国家科技支撑计划项目 （）
