小流量工况对混流泵气液两相瞬态流动特性的影响

发布时间：2018-03-02 21:46

本文选题：混流泵　切入点：叶轮　出处：《水电能源科学》2017年08期 　论文类型：期刊论文

【摘要】：为研究气液两相流对小流量工况下混流泵叶轮的影响,采用Euler-Euler非均相流模型,应用商业计算流体力学软件ANSYS CFX~汶模拟分析混流泵叶轮内的气液两相瞬态流动特性。结果表明,在一定含气率条件下,叶轮内的流体速度在小流量工况时受气相影响较大;不同流量工况时气相主要集中在靠近叶轮背面区域内;流量变小时,在叶轮入口到出口方向上由高扬程产生的压差作用是叶轮流道内气体体积分数变化的主要原因,且流量愈小其对叶轮进口处的气相体积分布影响越大。研究成果可以弥补混流泵理论研究的不足。
[Abstract]:In order to study the effect of gas-liquid two-phase flow on impeller of mixed-flow pump under small flow condition, Euler-Euler heterogeneous flow model was used to simulate and analyze the gas-liquid two-phase transient flow in impeller of mixed-flow pump by commercial computational fluid dynamics software ANSYS CFX-1. Under the condition of certain gas content, the velocity of fluid in impeller is greatly affected by gas phase under the condition of small flow rate, the gas phase is mainly concentrated in the area near the back of impeller under different flow conditions, and the flow rate becomes smaller. The pressure difference between the inlet and outlet direction of the impeller is the main reason for the change of the volume fraction of gas in the impeller passage. The smaller the flow rate, the greater the influence on the gas phase volume distribution at the impeller inlet, and the research results can make up for the lack of theoretical research on the mixed flow pump.
【作者单位】：西华大学能源与动力工程学院;
【基金】：国家自然科学基金项目(51379179) 四川省科技计划项目(2017JY0048)
【分类号】：TH313

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