排灌机械工程学报2013，Vol.31Issue(7)：565-569,5.DOI:10.3969/j.issn.1674-8530.2013.07.003
自吸泵自吸过程瞬态流动的数值模拟
Numerical simulation of transient flow in self-priming centrifugal pump during self-priming period
摘要
Abstract
The transient air-water two-phase flow field in 65ZB-40 self-priming centrifugal pump during self-priming period was simulated numerically by using the standard k-ε turbulence model,VOF multi-phase model,sliding mesh technique and the velocity profile measured at the inlet of the pump to disclose self-priming mechanism.The transient pressure,velocity and void fraction of the two-phase flow in the pump were acquired at 10 monitoring points in the volute and in 8 zones inside the impeller.The results revealed that the pressure and void fraction experience a rapidly transient process in most area of flow field inside the pump at the early and late stages of self-priming period.At the early stage of self-priming period,the velocity at the impeller entrance,in the cross-sections of volute,reflux hole and inlet to the air separation chamber oscillates,showing a dominated transient effect.关键词
自吸泵/自吸过程/气液两相流/含气率/数值模拟Key words
self-priming pump/self-priming process/gas-liquid two-phase flow/air volume fraction /numerical simulation分类
农业科技引用本文复制引用
李红,徐德怀,李磊,涂琴,邹晨海..自吸泵自吸过程瞬态流动的数值模拟[J].排灌机械工程学报,2013,31(7):565-569,5.基金项目
国家自然科学基金资助项目(51279068) （51279068）
国家农业科技成果转化项目(2011GB2C100015) （2011GB2C100015）
