基于CFD離心泵數(shù)值模擬及性能優(yōu)化
[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.
【學(xué)位授予單位】:華東理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2011
【分類號】:TH311
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