基于CFD离心泵数值模拟及性能优化
发布时间：2018-07-29 11:38
【摘要】：离心泵作为一种通用机械在日常生活与工业生产中得到广泛应用。该类泵每年所消耗的电量占总发电量的10%以上,另一方面我国离心泵的总体运行效率低下,节能潜力非常巨大。使用数值模拟技术进行离心泵性能研究是一个重要课题。 本文以MJ125-100型煤浆离心泵内部流场为研究对象,应用多重参考系MRF模型对离心泵内部流场定常三维流动进行了数值计算。得到了内部流动速度、压力分布图和计算扬程。数值模拟结果均符合理论分析情况,验证了该数值模拟的正确性。通过使用三种k-ε湍流模型分别计算不同流量内部流场模拟并与实验数据对比,得到合适的模型为RNG k-s湍流模型。研究了得出了最优叶片数目以及通过切削叶轮非工作面后流场参数对比,得出叶轮非工作面的切削可以提高泵效率。对离心泵叶轮设计,结构优化及节能改造有重要指导意义。
[Abstract]:As a kind of universal machinery, centrifugal pump is widely used in daily life and industrial production. This kind of pump consumes more than 10% of the total electric capacity every year. On the other hand, the overall operation efficiency of centrifugal pump in China is low, and the energy saving potential is very great. It is an important subject to study the performance of centrifugal pump by numerical simulation technology. In this paper, the internal flow field of MJ125-100 type coal slurry centrifugal pump is taken as the research object, and the steady three-dimensional flow in the centrifugal pump is numerically calculated by using the multiple reference system MRF model. The internal flow velocity, pressure distribution and the calculated head are obtained. The numerical simulation results are in accordance with the theoretical analysis, and verify the correctness of the numerical simulation. By using three kinds of k- 蔚 turbulence models to calculate the internal flow field of different flows and compare with the experimental data, the suitable model is RNG k-s turbulence model. The optimum number of blades and the comparison of flow field parameters after cutting impeller are studied. It is concluded that the efficiency of pump can be improved by cutting impeller without working face. It has important guiding significance for centrifugal pump impeller design, structure optimization and energy saving reform.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH311
本文编号：2152560
[Abstract]:As a kind of universal machinery, centrifugal pump is widely used in daily life and industrial production. This kind of pump consumes more than 10% of the total electric capacity every year. On the other hand, the overall operation efficiency of centrifugal pump in China is low, and the energy saving potential is very great. It is an important subject to study the performance of centrifugal pump by numerical simulation technology. In this paper, the internal flow field of MJ125-100 type coal slurry centrifugal pump is taken as the research object, and the steady three-dimensional flow in the centrifugal pump is numerically calculated by using the multiple reference system MRF model. The internal flow velocity, pressure distribution and the calculated head are obtained. The numerical simulation results are in accordance with the theoretical analysis, and verify the correctness of the numerical simulation. By using three kinds of k- 蔚 turbulence models to calculate the internal flow field of different flows and compare with the experimental data, the suitable model is RNG k-s turbulence model. The optimum number of blades and the comparison of flow field parameters after cutting impeller are studied. It is concluded that the efficiency of pump can be improved by cutting impeller without working face. It has important guiding significance for centrifugal pump impeller design, structure optimization and energy saving reform.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH311
【参考文献】
相关期刊论文 前10条
1 敏政;王乐;邵翔宇;;泥沙颗粒直径及体积分数对高比转速离心泵的影响[J];兰州理工大学学报;2009年01期
2 张峥;;基于FLUENT的离心泵内部流动的数值模拟[J];甘肃科技;2009年14期
3 黄思;阮志勇;刘龙珍;;应用CFD技术预测管道离心泵性能[J];化工机械;2009年02期
4 张静;吴波;覃正超;;离心泵内固液两相流动的三维数值模拟[J];湖南农业大学学报(自然科学版);2009年02期
5 周立;;基于FLUENT锌液泵内部流场数值模拟[J];金属材料与冶金工程;2009年04期
6 柏占伟;裴江红;胡韶华;;离心泵内流场的数值模拟[J];机械设计与制造;2009年06期
7 张淑佳;李贤华;朱保林;胡清波;;k-ε涡粘湍流模型用于离心泵数值模拟的适用性[J];机械工程学报;2009年04期
8 张金凤;袁寿其;付跃登;袁建平;;分流叶片对离心泵流场和性能影响的数值预报[J];机械工程学报;2009年07期
9 丁思云;杨博峰;郑国运;徐振法;韩伟;苏吉鑫;;叶片数对螺旋离心泵内部流场影响研究[J];流体机械;2009年07期
10 董亮;谈明高;王勇;王凯;路明臻;;转速对离心泵内部流动的影响[J];农机化研究;2009年11期
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