斜流泵内部流动的数值模拟及技术改造

发布时间：2018-02-08 19:50

本文关键词： 斜流泵内部流动数值模拟技术改造　出处：《西华大学》2011年硕士论文　论文类型：学位论文

【摘要】：斜流泵在我国国民经济建设的多个领域中发挥着极其重要的作用,斜流泵的安全生产和平稳运行是整个生产流程顺利进行的重要保障。由于斜流泵结构复杂,元件数量多,以往的研究都是单独针对其部件进行内部流动现象研究,随着计算机和CFD软件的快速发展,越来越多的研究开始着重于各个元件之间匹配之后的整体性能和相关设计研究。本文针对某厂家的立式斜流泵性能低下(流量扬程性能不能满足当时的设计要求)这一情况,采用UG建模软件进行其斜流泵实体建模,之后利用CFD软件NUMECA对厂家提供的原型水泵进行了三维流场的数值模拟计算,并详细分析其内部流动特性,找到性能低下的原因,而后在不更改水泵导叶的情况下,采用模型法重新优化设计了新的水泵叶轮,进行了技术改造,同时对更改叶轮之后的新的斜流泵的性能进行数值模拟,数值结果表明,叶轮更改之后的斜流泵在压力和速度分布方面都较之前得到了优化,且使用效率较之前也提高了约10%,性能提高比较明显。本文的研究工作为斜流泵等内部流场的数值模拟及其性能分析具有一定的指导意义,所得出的结论为今后针对泵类产品的设计改进和效率提升提供了一定的参考依据。
[Abstract]:Oblique flow pump plays an extremely important role in many fields of national economic construction in our country. The safe production and smooth operation of oblique flow pump is an important guarantee for the smooth progress of the whole production process. Because of the complex structure of oblique flow pump and the large number of components, With the rapid development of computer and CFD software, more and more research began to focus on the overall performance and related design research after matching each component. Aiming at the low performance of the vertical oblique flow pump (the flow head performance can not meet the design requirements at that time), the solid modeling of its oblique flow pump is carried out by UG modeling software. Then the three-dimensional flow field of the prototype pump provided by the manufacturer is simulated by CFD software NUMECA, and the internal flow characteristics of the pump are analyzed in detail to find out the cause of the low performance, and then, without changing the guide vane of the pump, the flow field of the prototype pump is simulated and calculated. The new pump impeller was redesigned by using the model method, and the technical transformation was carried out. At the same time, the performance of the new oblique flow pump after changing the impeller was numerically simulated. The numerical results show that, After the impeller change, the slant flow pump is optimized in pressure and velocity distribution, and its efficiency is increased by about 10%, and the performance is improved obviously. The research work in this paper has certain guiding significance for numerical simulation and performance analysis of internal flow field such as oblique flow pump. The conclusion can provide a certain reference for improving the design and efficiency of pump products in the future.
【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH38

【引证文献】