不同运行方式对一体化预制泵站流动特性和筒体强度的影响

The Influence of Different Operation Modes on Flow Characteristics and Cylinder Strength for Integrated Prefabricated Pumping Stations

为了更加准确和实际地研究泵运行位置、工作水位和潜水泵高度等因素对一体化预制泵站内流状态和筒体强度的影响,基于VOF气液两相流模型对一体化泵站进行流动数值计算,并采用Workbench平台对筒体进行单向流固耦合计算。结果表明:潜水泵对称运行时,入口偏流角较小,有利于提高泵的使用寿命。液位越低时流场越杂乱,流速越高,防沉积效果也最好,但同时也需要兼顾泵站的有效容积。一体化预制泵站的应力从筒底至筒顶逐渐减小,应变则逐渐增大。随着工作水位和安装高度的上升筒体最大应力均下降,随着安装高度的上升筒体最大应变减小。

In order to research the influence of pump operating position, water level and submersible pump height on flow state and cylinder strength of integrated prefabricated pumping station, the flow of the integrated pumping station is numerically calculated based on the VOF gas-liquid two- phase flow model. The unidirectional fluid-solid coupling calculation of the cylinder is carried out by using the Workbench platform. Results show that when the submersible pump is running symmetrically, the inlet deflection angle is small, which is beneficial to the service life of the pump. The lower the liquid level is, the more turbulent the flow field is. The higher the flow rate is, the best anti-sedimentation effect is. But it also needs to take into account the effective volume of the pumping station. The stress of the integrated pumping station decreases gradually from the bottom of the cylinder to the top of the cylinder, and the deformation increases gradually. With the rising of working water level and installation height, the maximum stress decreases. The maximum deformation of the cylinder decreases with the increase of submersible pump installation height.