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Improvement of SIMPLE Algorithm in Centrifugal Pump for CFD |
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PP: 1845-1856 |
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Author(s) |
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Liu Houlin,
Ren Yun,
Wu Denghao,
Yang Hongbin,
Tan Minggao,
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Abstract |
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| In this paper, SIMPLED algorithm, an improvement algorithm of SIMPLE, was developed, which is suitable for simulation
of inner flow in centrifugal pumps. Based on the open source code OpenFOAM, a new solver was compiled by using new algorithm
based on the original solver. To compare the efficiency and accuracy of SIMPLE and SIMPLED, the two algorithms were used to
simulate the inner flow of centrifugal pumps with different specific speeds under the design condition. The results showed that under the
same convergence criterion, the iteration time of SIMPLED was almost the same as SIMPLE. However, the head prediction discrepancy
of the former was about 3% smaller than that of the latter, and the efficiency prediction discrepancy of the pumps, the decrease was
about 2%. In order to further study the applicability of SIMPLED algorithm, the flow in a medium specific speed centrifugal pump
under three flow rate conditions was simulated by these two algorithms. By comparison, it was found out that the SIMPLED algorithm
was also more accurate than the SIMPLE algorithm for inner flow simulation at off-design conditions. Therefore, SIMPLED algorithm
is a new efficient and exact modification of SIMPLE algorithm. |
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