|
|
|
| Optimal design for secondary impeller of decompression tower bottom pump with high temperature by CFD |
| Hu Jingning, Liu Sanhua, Jiang Wei, Huang Mingke, Zhang Li |
| (Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
|
|
|
|
Abstract Nine groups of secondary internal flows of the decompression tower bottom pump on high temperature were simulated by Fluent, which consisted of the secondary impellers with different outlet widths and the volutes with different throat opening areas, and their performance characteristics were predicted by using finite volume method to disperse Reynolds-Averaged Navier-Stokes(RANS) equations, stan dard k-ε turbulence model and SIMPLEC algorithm. According to the predicted results, the perfor mance curves were plotted and the influence caused by the outlet widths of the impellers and the throat opening areas of the volutes were analyzed. The analyzing results indicate that with the throat opening area increasing, the inlet width of volute increases, the back flow easily emerges at small flow rate, the head reduces, and high efficiency area moves to large flow, increasing the impeller outlet width can enlarge high effective area range. It provides reference for the optimal design of the pump, and the combination C-b is considered to be the best option.
|
|
Received: 19 October 2009
Published: 30 March 2010
|
|
|
|
| [1]Hornsby C. CFD—driving pump design forward[J]. World Pumps, 2002(431)：18-22.[2]González J, Fernández J, Blanco E, et al. Numerical simulation of the dynamic effects due to impeller volute interaction in a centrifugal pump[J]. Journal of Fluids Engineering, Transactions of the ASME, 2002, 124(2)：348-355.[3]Byskov R K, Jacobsen C B, Pedersen N. Flow in a centrifugal pump impeller at design and off design conditions—Part Ⅱ：large eddy simulations[J]. Journal of Fluids Engineering, 2003, 125(1)：73-83.[4]张楚华，谷传纲，苗永淼．离心叶轮及无叶扩器内湍流的非结构化网格数值解法[J]．工程热物理学报，2000，21（4）：446-450．Zhang Chuhua, Gu Chuangang, Miao Yongmiao. Numerical simulation of turbulent flows in backswept impeller and vaneless diffuser[J]. Journal of Engineering Thermophysics, 2000，21（4）：446-450. (in Chinese)[5]龙新平，关运生，韩宁，等．可调式射流泵性能的数值模拟[J]．排灌机械，2008，26（6）：1-5．Long Xinping, Guan Yunsheng, Han Ning, et al. Numerical simulation on performance of self regulating jet pump[J]. Drainage and Irrigation Machinery, 2008， 26(6)：1-5.(in Chinese)[6]王文全，张立翔，闫妍，等．节能离心泵全流道内部湍流的动态大涡模拟[J]．流体机械，2008，36（1）：14-18．Wang Wenquan, Zhang Lixiang, Yan Yan, et al. Dynamic large eddy simulation of turbulent flow in an energy saved centrifugal pump[J]. Fluid Machinery, 2008，36（1）：14-18. (in Chinese)[7]杨敏官，李辉，刘栋，等．液下泵内三维湍流流动的数值模拟[J]．机械工程学报，2008，44(3)：160-165．Yang Minguan, Li Hui, Liu Dong, et al. Numerical simulation of 3D turbulent flow in underwater pump[J]. Journal of Mechanical Engineering, 2008，44(3)：160-165. (in Chinese)[8]Plutecki J, Skrzypacz J. CFD simulations of 3D flow in a pump stator with a spherical surface[J]. World Pumps, 2003(443)：28-31.[9]宫恩祥，周生贵，肖霞平，等．基于CFD的反渗透海水淡化高压泵的性能预测[J]．排灌机械，2009，27（2）：100-104．Gong Enxiang, Zhou Shenggui, Xiao Xiaping, et al. Performance predictions of high pressure pump for 10 000 tons reverse osmosis desalination system based on CFD[J].Drainage and Irrigation Machinery, 2009，27(2)：100-104. (in Chinese) |
|
|
|
