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科技导报  2015 

运用变转速法计算离心泵启动停机的瞬态流动性能

DOI: 10.3981/j.issn.1000-7857.2015.02.006, PP. 49-53

Keywords: 变转速方法,离心泵启动停机,非定常流场,数值模拟

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Abstract:

离心泵启动和停机等问题归根结底是离心泵水力性能随转速变化的瞬态过程。以常用的IS125型管道离心水泵为例,在数值模拟中采用叶轮转速随时间变化的CFD计算方法,研究离心泵开机、停机等变转速过程中水泵内部流动状态以及外特性的动态变化。整个模拟计算过程包括泵启动、正常运行、停机和停机后4个阶段。模拟计算得到了4个阶段不同时刻泵内流场分布状况,得到了4个阶段流量扬程等水泵外特性参数随时间的变化规律,可为改善水泵的设计性能和实际运行性能提供理论依据。

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