In order to study the internal flow characteristics of centrifugal pumps with a split impeller under gas-liquid mixed transportation conditions, this paper conducted a steady calculation of the flow field in the centrifugal pump under the conditions of different inlet gas volume fractions based on the Eulerian-Eulerian heterogeneous flow model, using air and water as the working media and the Schiller Nauman model for the interphase resistance. This paper takes a low specific speed centrifugal pump as the research object, through the controlling variables, using the same pump body structure and pump body geometric parameters and setting three different arrangements of long and short blades (each plan uses the same long and short blades) to explore the influence of the short blade arrangement on the low specific speed centrifugal pump performance under a gas-liquid two-phase flow. The research results show that, under pure water conditions, the reasonable arrangement of the short blade circumferential position can eliminate the hump of the centrifugal pump under low-flow conditions, can make the flow velocity in the impeller more uniform, and can optimize the performance of the pump. Under the design conditions and the gas-liquid two-phase inflow conditions, when the circumferential position of the short blades is close to the suction surface of the long blades, some of the bubbles on the suction surface of the long blade can be broken under the work of the pressure surface of the short blade and flow out of the impeller with the liquid, which improves the flow state of the flow field in the impeller.

中文翻译：

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短叶片周向位置布置对离心泵气液两相流性能的影响

为了研究分体式叶轮离心泵在气液混合运输条件下的内部流动特性，基于欧拉方程，对进气量不同的情况下离心泵的流场进行了稳定计算。 -欧拉非均质流动模型，使用空气和水作为工作介质，而席勒·瑙曼模型则用于相间阻力。本文以低比转速离心泵为研究对象，通过控制变量，使用相同的泵体结构和泵体几何参数，并设置长叶片和短叶片的三种不同布置（每个计划使用相同的长叶片和短叶片），以探讨短叶片布置对低速下离心泵性能的影响气液两相流。研究结果表明，在纯水条件下，短叶片周向位置的合理布置可以消除低流量条件下离心泵的驼峰，使叶轮内的流速更加均匀，并可以优化性能。的泵。在设计条件和气液两相流入条件下，当短叶片的圆周位置靠近长叶片的吸入面时，