离心泵内部流场的数值模拟与实验分析

发布时间：2018-05-01 06:24

本文选题：离心泵 + 三维建模　；参考：《河北工程大学》2012年硕士论文

【摘要】：离心泵是一种应用较广泛的能耗大效率低的设备。近年来,随着计算机技术的快速发展,利用FLUENT实现离心泵的内部流场数值模拟为了解和掌握离心泵复杂的内部流动开辟了新的途径,弥补了传统设计方法的不足,对离心泵的优化设计、水力性能的改善、提高其效率具有非常重要的意义。本文首先采用Pro/E软件建立离心泵的三维实体模型,然后采用计算流体动力学软件FLUENT对RY型离心泵进行内部流场的数值模拟,得到不同工况下离心泵内部流场不同时刻的速度分布和压力分布,分析了离心泵内部的流动规律,并进行性能预测。在此基础上对RY型离心泵进行优化改进,并对优化后的离心泵进行不同工况下内部流场的数值模拟,通过计算结果与实验结果的比较验证该方法计算离心泵内部流动的可行性和正确性。本文主要作了以下几方面的研究工作： (1)介绍了离心泵内部流场数值模拟的国内外发展研究现状及商用CFD软件的发展,从控制方程、湍流模型问题的提出及解决方法、湍流模型的后处理等多方面介绍了湍流流动数值模拟理论。 (2)介绍了计算流体动力学的基本理论知识,阐述了流体与流动的基本特性,给出了流体动力学的基本控制方程。 (3)利用Pro/E软件对RY型离心泵过流部件进行实体造型,建立离心泵的三维实体模型。 (4)介绍了FLUENT环境下离心泵的数值计算过程,应用滑移网格法对离心泵内部湍流流动进行非定常数植模拟,得到不同工况下各个时刻的速度分布和压力分布。通过计算结果比较分析,揭示了离心泵内部的流动规律。 (5)根据数值模拟结果对现有RY型离心泵进行优化设计,并以此为基础进行离心泵的性能预测,将预测结果与已有的实验测试结果进行分析比较,验证了所采用方法的可行性和正确性。
[Abstract]:Centrifugal pump is a kind of equipment with low energy consumption and low efficiency . In recent years , with the rapid development of computer technology , using FLUENT to realize the internal flow field numerical simulation of centrifugal pump opens up a new way to understand and master the complex internal flow of centrifugal pump . It makes up for the shortage of traditional design method . It is very important to optimize the design of centrifugal pump , improve hydraulic performance and improve its efficiency .

This paper first uses Pro / E software to build three - dimensional solid model of centrifugal pump , then uses FLUENT software FLUENT to simulate the internal flow field of centrifugal pump .

This paper mainly studies the following aspects :

( 1 ) The development of the numerical simulation of the flow field in the centrifugal pump and the development of the commercial CFD software are introduced . The numerical simulation theory of turbulent flow is introduced from the aspects of the control equation , the problems of the turbulence model , the solution method , the post - treatment of the turbulence model , etc .

( 2 ) The basic theory knowledge of fluid dynamics is introduced , the basic characteristics of fluid and flow are expounded , and the basic control equation of fluid dynamics is given .

( 3 ) using Pro / E software to make solid modeling of the flow components of RY type centrifugal pump , and establishing a three - dimensional solid model of the centrifugal pump .

( 4 ) The numerical calculation process of the centrifugal pump in the FLUENT environment is introduced . The turbulent flow in the centrifugal pump is simulated by the slip grid method , and the velocity distribution and the pressure distribution at each time are obtained . Through the comparison of the calculation results , the flow law inside the centrifugal pump is revealed .

( 5 ) According to the numerical simulation results , the existing RY type centrifugal pump is optimized and the performance prediction of the centrifugal pump is carried out on the basis of the numerical simulation results , and the prediction result is compared with the existing experimental test results , and the feasibility and the correctness of the adopted method are verified .

【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311

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