摘要
以一台典型的清水式离心泵为研究对象,采用数值模拟和试验研究的方法,对3种不同流量工况下的离心泵内部空化特性进行了对比分析。结果表明:数值模拟与试验结果存在一定差异,具体表现为小流量区比较吻合,大流量区差异较大;临界汽蚀余量时,离心泵空化已经很严重,通过数值模拟发现,初生空化发生在临界汽蚀余量之前很长一段时间。因此后续应针对该泵展开初生空化研究。
A water centrifugal pump is taken as the object of the research,with the methods of numerical simulation and experimental researchs,centrifugal pump cavitation performance of 3 flow conditions is compared and analyzed. The result shows： there are some differences between numerical simulation and experimental results,the differences of low flow area are less than the large flow area; When is the critical NPSH,centrifugal pump cavitation is highly serious,and the initial cavitation took place in a long time before the critical NPSH. Therefore,initial cavitation research should be expanded for the pump in the future.
出处
《黑龙江大学工程学报》
2016年第1期87-91,共5页
Journal of Engineering of Heilongjiang University
基金
国家自然科学基金资助项目(51379179)
关键词
离心泵
数值模拟
空化特性
临界汽蚀余量
centrifugal pump
numerical simulation
cavitation characteristic
critical NPSH
