基于叶片载荷分布的离心泵水力性能研究

发布时间：2018-01-04 15:46

本文关键词：基于叶片载荷分布的离心泵水力性能研究　出处：《浙江理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：离心泵在国民经济中的各个部门有着重要的地位,叶轮作为离心泵中的核心部件,其性能的好坏直接影响离心泵甚至整个工业流程的性能,因此离心泵叶轮的内部流动和优化设计一直被研究者所关注。本文以一圆柱形叶片离心泵作为研究对象,对叶片载荷分布与离心泵水力性能之间的关系进行了深入研究。1.采用Solidworks三维软件对离心泵进行建模,采用ICEM和Workbench相结合对模型泵进行混合网格划分,然后通过网格无关性分析,确定合理的网格数进行后续的数值计算。2.对原模型泵进行非定常数值计算,将数值计算结果与实验数据进行对比,验证数值计算方法的可靠性和准确性。3.通过数值计算结果,绘制出0.2Q_d~1.0Q_d九种不同流量工况下的叶片载荷曲线。分析流量变化对叶片载荷分布的影响,对设计流量工况下的叶片载荷曲线进行三段式拟合,然后根据此载荷曲线对原型泵进行反设计,并对原型泵与反设计泵进行了对比分析。4.在保证叶片总加载载荷不变的前提下,调整叶片载荷主加载区斜率,设计9种不同叶片载荷分布的叶轮。采用SSTκ-ω湍流模型对离心泵进行整机非定常数值计算,分析不同叶片载荷分布下离心泵的扬程、效率、径向力、内部流动和压力脉动情况。总结分析叶片载荷主加载区斜率变化对离心泵水力性能的影响。5.在保证叶片总加载载荷不变的前提下,调整叶片载荷分布,设计4种模型,进一步分析叶片载荷前加载点位置以及后加载点的位置和大小对离心泵水力性能的影响。
[Abstract]:Centrifugal pump of various departments in the national economy plays an important role, as a core component of impeller of centrifugal pump, its performance directly affects the performance of the centrifugal pump and the industrial process, so the internal flow and optimization design of centrifugal pump impeller has been concerned by researchers. In this paper, a cylindrical blade centrifugal pump as the object of study, the relationship between the hydraulic performance of centrifugal pump blade load distribution and the in-depth research on the.1. modeling of centrifugal pump using Solidworks 3D software, the model of the pump are mixed mesh using ICEM and Workbench combination, and then through the grid independence analysis, determine the number of grid reasonable for subsequent numerical unsteady numerical calculation of.2. of the original model pump, the numerical results are compared with experimental data, numerical calculation method to verify the reliability and accuracy of.3. The results of numerical calculation, draw the blade load curve 0.2Q_d~1.0Q_d nine different flow conditions. The analysis of flow change on the influence of blade load distribution, the three section of the blade load curve fitting design flow conditions, then according to the load curve of the prototype pump reverse design, and the prototype of the pump and pump reverse design compared the.4. in the premise of ensuring the total blade load constant, adjust the blade load loading slope design, 9 different blade load distribution of impeller. Using SST k-omega turbulence model of centrifugal pump for the unsteady numerical analysis of different blade load distribution under centrifugal pump lift and efficiency radial force, internal flow and pressure pulsation. Analysis of blade load loading area slope change on the hydraulic performance of centrifugal pump.5. to ensure constant load leaves total summary On the premise of adjusting blade load distribution, 4 models are designed to further analyze the influence of loading point location and location and size of rear loading point on hydraulic performance of centrifugal pump.

【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH311

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