流体机械2012，Vol.40Issue(10)：18-22,74,6.DOI:10.3969/j.issn.1005-0329.2012.10.005
湍流模型在离心泵偏工况性能预测中的适用性分析
Analysis of Applicability of Turbulence Models in Performance Prediction for Centrifugal Pumps at the Off-design Conditions
摘要
Abstract
Five excellent centrifugal pumps with differenet specific speed were selected as research models. Five two-equation turbulence models were used to calculate the inner flow of the above research pumps at the off-design conditions using Fluent Software. Lastly, comparisons were made with experimental results and the numerical results among those models. It can be concluded that for inner flow at the off-design conditions with the low specific speed and high specific speed centrifugal pump, a relative small error can be obtained by SST k-ω model with the least tolerance of less than 1% ; For the medium specific speed centrifugal pumps, while the calculation results of RNG k-e model were more closer to experimental results than others at the small flow condition, the SST k-ω model got the best results at the large flow condition, with the minimum error at 0. 2% and the maximum error no more than 4%. The distributions of vorticity magnitude of five turbulence models were relatively similar, however, the distinct differences among the turbulence intensity of those models were found. The turbulence intensity at volute difruser was invisible for RNG k-emodel not for others. Above all, it can be suggested that SST k-ω model should be applied to simulate the inner flow at the off-design conditions in centrifugal pumps.关键词
湍流模型/非设计工况/离心泵/数值模拟Key words
turbulence model/ off-design conditions/ centrifugal pump/ numerical simulation分类
机械制造引用本文复制引用
任芸,刘厚林,舒敏骅,吴贤芳..湍流模型在离心泵偏工况性能预测中的适用性分析[J].流体机械,2012,40(10):18-22,74,6.基金项目
国家自然科学基金项目(50825902、21079062、51109095、51179075) （50825902、21079062、51109095、51179075）
江苏省自然科学基金项目(BK2009006、BK20100346) （BK2009006、BK20100346）
江苏省产学研前瞻性研究项目(BY201140) （BY201140）
