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  • 中国标准连:ISSN1005-2895
  • 续出版物号: CN 33-1180/TH
  • 主管单位:轻工业杭州机电设计研究院有限公司
  • 主办单位:轻工业杭州机电设计研究院有限公司、中国轻工机械协会、中国轻工业机械总公司
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  • 主  编:黄丽珍
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仲高超, 邵春雷.气液两相流泵断气过渡过程数值模拟研究[J].轻工机械,2021,39(3):30-36
气液两相流泵断气过渡过程数值模拟研究
Numerical Simulation of Gas Liquid Two Phase Flow in Pump during Transition Process of Cutting off Gas
  
DOI:10.3969/j.issn.1005 2895.2021.03.005
中文关键词:  离心泵  气液两相流  过渡过程  Eulerian Eulerian非均相流模型  SST κ ω湍流模型
英文关键词:centrifugal pump  gas liquid two phase flow  transition process  Eulerian Eulerian heterogeneous flow model  SST κ ω turbulence model
基金项目:江苏省自然科学基金项目(BK20191361);江苏省高等学校自然科学研究重大项目(17KJA480003);江苏省研究生科研与实践创新计划项目
作者单位
仲高超, 邵春雷 南京工业大学 机械与动力工程学院 江苏 南京211816 
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中文摘要:
      为了探究离心泵内部断气过渡过程,课题组采用Eulerian Eulerian非均相流模型和SST κ ω湍流模型对泵内气液两相流动断气过渡过程进行了数值模拟,揭示了泵内过渡过程流动规律,确定了泵内断气过渡过程结束的判定依据。研究结果表明:采用泵出口气相体积分数作为判断断气过渡过程结束的依据更为准确,当t>0.6 s后,泵出口气相体积分数不再随时间变化,可视为过渡过程结束;从蜗壳第Ⅰ~Ⅷ截面上的气相体积分数和压力变化来看,各监测点上气相体积分数的时均值随时间的变化规律基本相同,均先波动一段时间,再迅速减小,最后趋于稳定;各监测点上的时均压力先快速上升再上下波动。研究结果对进一步改进泵的结构设计以及提高泵运行的稳定性具有重要意义。
英文摘要:
      In order to study the gas liquid two phase flow in the centrifugal pump during the transition process of cutting off gas, the Eulerian Eulerian heterogeneous flow model and the SST κ ω turbulence model were used to simulate. The flow law of transition process in the pump was revealed. The criterion for judging the end of transition process in the pump was determined. The results show that it is more accurate to use the gas phase volume fraction at the pump outlet as the basis for judging the end of the transition process. When t>0.6 s, the gas phase volume fraction at the pump outlet no longer changes with time and can be regarded as the end of transition process. According to the variation of the gas phase volume fraction and pressure on the sections Ⅰ to Ⅷ of the volute, the time averaged of gas phase volume fraction at each monitoring point has basically the same change rule with time, which fluctuates for a period of time, then rapidly decreases, and finally tends to be stable. The time average pressure at each monitoring point first rises rapidly and then fluctuates up and down. The research results have great significance to further improve the structural design of the pump and improve the stability of the pump operation.
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