双吸型离心泵叶轮建模及流场分析

发布时间：2018-05-29 13:46

本文选题：双吸式叶轮 + 参数化　；参考：《湘潭大学》2013年硕士论文

【摘要】：叶轮是离心泵的关键部件，其设计速度和水力学性能直接影响到产品的开发周期和竞争力。为节省离心泵叶轮水力学性能的验证以及优化的成本，，本文采用参数化建模手段大幅度降低模型建立的时间，利用FLUENT软件对离心泵叶轮内部流场进行仿真分析以节省试验成本。本论文以双吸型离心泵叶轮为基础，在详细了解国内外叶轮CAD技术的前提下，针对目前双吸型叶轮的不足之处，采用参数化建模技术，在SolidWorks这一软件平台上，开发出双吸型离心泵参数化设计软件，为后续叶轮内部流场分析作好了准备。近年来，计算流体力学（CFD）技术已经成功地运用于数值模拟分析离心泵内部流场，本文在前面参数化建模的基础上，以FLUENT软件计算分析了双吸式离心泵内部流场，同时对叶轮优化方案进行了探讨。本文的研究结果有： (1)以流场分析为目的，分析研究了叶轮流场区域的建模方案； (2)采用参数化技术建模，大幅度减少了叶轮设计人员的重复工作，提高了设计生产效率； (3)在参数化建模的基础上，采用商业软件FLUENT对双吸式离心泵内部流场进行了分析，为后续双吸式离心泵叶轮参数优化提供了计算依据。计算结果表明，本文采用FLUENT软件对离心泵叶轮内部流场进行分析是可行的； (4)在参数化建模的基础上，对叶轮优化方案进行了探讨。对于本文的研究的低比转速离心泵，在叶轮内添加偏置短叶片可以大幅度提高离心泵的扬程，同时大量的数值计算表明，短叶片的添加会在一定程度上减小尾流区域，但并不一定会使离心泵的水力学性能提高。本文研究对象的偏置短叶片最佳入口直径为370mm，此时扬程提升9.96%，水力学效率提高0.74%。
[Abstract]:Impeller is the key component of centrifugal pump. Its design speed and hydraulic performance directly affect the development cycle and competitiveness of the product. In order to reduce the hydraulic performance verification and optimization cost of centrifugal pump impeller, the parameterized modeling method is used to greatly reduce the time of modeling, and the flow field in centrifugal pump impeller is simulated by FLUENT software to save test cost. This paper is based on double suction centrifugal pump impeller, on the premise of knowing the impeller CAD technology at home and abroad in detail, aiming at the deficiency of double suction impeller at present, adopting parameterized modeling technology, on the SolidWorks software platform. The parameterized design software of double suction centrifugal pump is developed to prepare for the flow field analysis of impeller. In recent years, the computational fluid dynamics (CFD) technique has been successfully applied to the numerical simulation and analysis of the flow field in the centrifugal pump. Based on the previous parameterized modeling, the internal flow field of the double suction centrifugal pump has been calculated and analyzed by FLUENT software. At the same time, the optimization scheme of impeller is discussed. The results of this paper are as follows: 1) for the purpose of flow field analysis, the modeling scheme of impeller flow field region is analyzed and studied. 2) Parametric modeling is adopted, which greatly reduces the repeated work of impeller designers and improves the efficiency of design and production. On the basis of parameterized modeling, the internal flow field of double suction centrifugal pump is analyzed by commercial software FLUENT, which provides a basis for the optimization of impeller parameters of double suction centrifugal pump. The results show that it is feasible to analyze the internal flow field of centrifugal pump impeller by FLUENT software. On the basis of parametric modeling, the optimization scheme of impeller is discussed. For the centrifugal pump with low specific speed studied in this paper, the head of centrifugal pump can be greatly improved by adding bias short blade to the impeller, and a large number of numerical calculations show that the addition of short blade can reduce the wake area to a certain extent. But it does not necessarily improve the hydraulic performance of centrifugal pumps. The optimum inlet diameter of the bias short blade is 370 mm, the lift is 9.96 and the hydraulic efficiency is 0.74 mm.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH311

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