排灌机械工程学报2013，Vol.31Issue(1)：15-19,5.DOI:10.3969/j.issn.1674-8530.2013.01.004
基于CFD的汽车水泵优化设计
Optimization of automobile pump based on CFD
摘要
Abstract
The hydraulic design of an original model of the WP7 diesel engine cooling pump was optimized by solving the time-averaged Navier - Stokes equations,the standard k - ε two-equation turbulence model and the multiphase flow model with CFD code-CFX.A structured hexahedral mesh has been generated for improving accuracy of numerical simulation.A comparison of fluid static pressure,turbulent kinetic energy and vapor volume fraction contours,hydraulic and suction performance was made between the original pump and optimized one.It was shown that the optimized pump not only exhibits obviously low turbulent kinetic energy and vapor volume fraction at the impeller entrance,but also has a better hydraulic and suction performance compared with the original impeller.The impeller with the blade leading edge that was properly extended into the impeller eye and with a certain inclined angle with respect to the pump shaft has an improved hydraulic and suction performance due to reduced shock losses at the leading ledges and more uniformed flow pattern at the impeller entrance,causing the head was raised by around 3.16 m and NPSHC was declined as low as about 1.10 m.Even thought the performance predicted by CFD has a certain difference from the experimental one,the variation tendency of them is consistent with each other.关键词
汽车水泵/叶轮叶片/汽蚀性能/外特性/临界汽蚀余量Key words
automobile pump/impeller blade/cavitation performance/external characteristic/critical NPSH分类
农业科技引用本文复制引用
施卫东,裴冰,陆伟刚,王川,李伟..基于CFD的汽车水泵优化设计[J].排灌机械工程学报,2013,31(1):15-19,5.基金项目
国家自然科学基金资助项目(51279069) （51279069）
江苏省高等学校优秀科技创新团队计划项目(苏教科(2009)10号) （苏教科(2009）
