摘要
考虑到汽车水泵进出口管和蜗壳,对某型汽车水泵进行了全三维流场数值模拟。分析数值模拟结果与试验测试结果的差异,说明该水泵的蜗壳与叶轮不匹配,造成整机性能恶劣。对该泵内部的流场和总压变化过程的进一步分析,提出了减小叶轮出口安装角,扩大扩散管截面积,采用蜗壳高度渐变的改进措施。改进后的水泵进行整机模拟并进行性能预测,表明改进后的水泵性能大大改善。经过实验测试的结果与计算结果吻合,说明改进措施有效,数值计算模型合理。
3D numerical simulation of internal turbulent flow for a centrifugal pump included with inlet and outlet ducts and volute is presented here. By comparing simulation results to available experimental results, the mismatched volute to the impeller was observed and it led to a detailed analysis of associated local flow fields and total pressure variation in the pump. From these investigations, some improvement including decreasing the blade angle at tailing edge, expanding the cross section of the outlet pipe and gradually increasing the depth of the volute along the flow direction is proposed to improve the performance of the pump. The modified pump performance was evaluated by numerical simulation and experiment. A quantitative agreement with the experimental and predicted results was found. It proves the pump performance has been largely improved and the numerical model of the centrifugal pump is reasonable.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第6期961-963,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50676054)
国家863计划资助项目(No.2006AA05Z250)
关键词
离心泵
数值模拟
开式叶轮
centrifugal pump
numerical simulation
open impeller
