铝银电池电液循环泵气液两相流动特性仿真  

Flow characteristics numerical simulation of aluminum silver oxide battery electro-hydraulic circulation pump under gas-liquid two-phase flow

作　　者：邢树兵 高新龙[1] 闻杰[1] 李学海[1] 韩超[1] XING Shubing;GAO Xinlong;WEN Jie;LI Xuehai;HAN Chao(Tianjin Institute of Power Sources,Tianjin 300384,China)

机构地区：[1]中国电子科技集团公司第十八研究所,天津300384

出　　处：《电源技术》2023年第3期366-369,共4页Chinese Journal of Power Sources

摘　　要：为进一步了解气液两相工况下的铝氧化银电池电液循环泵内部流动特性,选取比转数ns=63.7的某型铝氧化银电池电液循环泵作为研究对象,结合CFD数值模拟技术,基于CFX软件中的Eulerian-Eulerian非匀相流模型,对泵内部流动特性进行仿真计算,得到不同进口含气率工况下的中截面压力、气相体积分数分布及流线分布。结果表明:随着进口含气率增加,电液循环泵内流体分布不均匀度增加,叶轮对流体做功能力下降;循环泵内气相分布主要集中在叶片工作面进口区域,随着进口含气率变大,部分流道会被气体严重堵塞,导致泵的流量、扬程产生剧烈波动;随着进口含气率增加,旋涡、回流影响范围逐渐扩大,在旋涡、回流及气液两相滑移的相互作用下,流道内流线分布十分紊乱,产生较大的能量损失,造成扬程及效率下降。In order to learn more about the flow characteristics of the aluminum silver oxide battery electrohydraulic circulation pump under gas-liquid two-phase conditions,an electro-hydraulic circulation pump with a specific speed of 63.7 was selected.Combined with CFD numerical simulation technology,the flow characteristics of the aluminum silver oxide battery electro-hydraulic circulation pump were simulated by applying the Eulerian-Eulerian inhomogeneous multiphase flow model of the CFX software.The pressure distribution,gas volume fraction distribution and streamline distribution in the mid-section under different IGVF(inlet gas volume fraction)conditions were obtained.The results show that with the increasing of IGVF,the flow inhomogeneity between the gas phase and the liquid phase is exacerbated,and the impeller's working ability to the fluid decreases.The gas phase in the electro-hydraulic circulation pump is mainly accumulated on the blade working surface near the inlet.With the increasing of IGVF,part of the flow channel will be seriously blocked by gas,leading to violent fluctuation in the flow and head of the electro-hydraulic circulation pump.The influence range of the vortex and backflow gradually expands with the increasing of IGVF.Under the interaction of vortex,backflow and gas-liquid two-phase slip,the streamline distribution in the flow channel of the pump is very disordered.The head and efficiency decrease,resulting in a large energy loss.

关 键 词：铝氧化银电池 电液循环泵 气液两相 流动特性 

分 类 号：TM911[电气工程—电力电子与电力传动]