离心式井用潜水泵的设计及计算机模拟

发布时间：2018-07-07 10:09

本文选题：计算流体力学 + 数值模拟　；参考：《太原理工大学》2012年硕士论文

【摘要】：泵是一种将原动机的机械能转化为被输送流体的压力能和动能的动力设备,它是能源的输运动力,为了满足工业发展的需要而发展起来的。提高泵的运行安全性能和降低其能耗是泵研究设计者的两个主要目标。井用潜水泵是一项重要的农田灌溉和人畜饮水设备,对抗御干旱,促进农业增产,解决人畜饮水起到了举足轻重的作用。本文通过理论研究和数值模拟,对一款已有实验数据[49]的井用潜水泵,依据相关的设计理论和方法,进行数学和物理建模,然后进行数值模拟和研究分析。首先对离心泵设计理论作出较为详细的介绍,以及对离心泵内流场的数值模拟所需要的流场基本理论,也就是计算流体力学做出了简要介绍。在对泵的流场研究的时候,基于三维模拟螺旋型蜗壳模拟的实现困难性,依据传统设计理论基础,做了二维的数值模拟,蜗壳采用了标准螺旋型结构,对流场情况进行了详细分析。由于二维叶轮叶片的工作面无法实现空间曲面结构,为了实现叶轮部分的更合理化设计,故而做出了三维数值模拟。利用UG进行三维建模,建立出了三维流体流道模型,然后利用了Workbench进行网格划分,然后把划分好的网格导入fluent中进行计算,采用流量监测扬程的办法进行模拟,模拟方案分别选取了从小流量到大流量的18个工况点进行,再对模拟结果的压力场,湍动能场以及速度矢量场进行了较为细致的分析,并对不同流量工况下的各种物理场进行了比较分析,得出它们随流量改变的变化规律。根据模拟所得结果,计算出各工况下的性能参数,从而绘制出该离心式井用潜水泵的性能曲线,并对各性能曲线和实验数据所性能曲线进行对比分析,然后得出了该设计的合理性和可行性。本文通过理论分析和CFD数值模拟,最终得到了离心泵丰富的内部流场信息,为该类离心泵的设计和进一步的实验以及投入生产提供了一定的参考价值。
[Abstract]:Pump is a kind of power equipment which transforms the mechanical energy of the original motive into the pressure energy and kinetic energy of the conveyed fluid. It is the power of the energy and is developed to meet the needs of the industrial development. It is the two main goal of the pump research designer to improve the safety performance of the pump and reduce the energy consumption of the pump. The well submersible pump is an important one. The irrigation of farmland and the drinking water of man and livestock play an important role in fighting drought, promoting agricultural production and solving the problem of drinking water for human and livestock.
In this paper, through theoretical research and numerical simulation, the mathematical and physical modeling of a well submersible pump with an existing experimental data [49] is carried out according to the related design theory and method. Then the numerical simulation and analysis are carried out. First, the theory of centrifugal pump design is introduced in detail, and the numerical simulation of the flow field in the centrifugal pump is made. The basic theory of flow field, which is the computational fluid mechanics, is briefly introduced. In the study of the flow field of the pump, based on the traditional design theory basis, a two-dimensional numerical simulation is made based on the traditional design theory basis. The spiral case adopts the standard spiral structure, and the convective field is divided into detail. In order to realize the more rational design of the part of the impeller, three-dimensional numerical simulation is made in order to realize the more rational design of the impeller part. Three-dimensional modeling is made with UG, and a three-dimensional fluid flow channel model is established. Then Workbench is used to mesh the mesh, and then the meshed mesh is introduced into the fluent In the calculation, the method of flow monitoring head is used to simulate. The simulation scheme selects 18 working conditions from small flow to large flow, and then analyses the pressure field, turbulent kinetic field and velocity vector field of the simulated results, and compares and analyses the physical fields under different flow conditions. According to the simulation results, the performance parameters of each working condition are calculated, and the performance curves of the submersible pump for the centrifugal well are drawn, and the performance curves of each performance curve and the experimental data are compared and analyzed, and then the rationality and feasibility of the design are obtained.
In this paper, through theoretical analysis and CFD numerical simulation, the rich internal flow field information of the centrifugal pump is obtained, which provides a certain reference value for the design of this kind of centrifugal pump, the further experiment and the production of the centrifugal pump.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311

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