Three dimensional Reynolds averaged NS equation and SA turbulent model were adopted to simulate the flow field and hydraulic performance of the impeller in a waterjet axialflow pump. Numerical research results show that the hydraulic performance of the impeller can be improved by increasing the inlet and outlet blade stagger angle. At the design condition, the best hydraulic performance of the impeller can be obtained when the inlet and outlet blade stagger angle respectively increases 2o and 6o. At offdesign condition, the blade suction separation zone increases at low flow rate condition when the inlet blade stagger angle increases. The high efficiency zone of the impeller can be extended by increasing the outlet blade stagger angle at large flow rate condition, and the working capacity of the impeller can also be enhanced. But the flow is relatively disordered at flow rate condition, which results in the larger zone of corner separation.
Key words
waterjet axialflow pump /
impeller /
blade stagger angle /
hydraulic performance /
numerical research
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
［1］ 常书平, 王永生, 靳栓宝. 轴流式喷水推进泵水力设计和性能检验 ［J］. 哈尔滨工程大学学报, 2011,32(10): 1278-1282.
CHANG Shu-ping, WANG Yong-sheng, JIN Shuan-bao. Hydraulic design and performance investigation of a waterjet axial flow pump ［J］. Journal of Harbin Engineering University, 2011,32(10): 1278-1282.(in Chinese)
［2］ BING Hao, CAO Shu-liang, TAN Lei. Effects of meridional flow passage shape on hydraulic performance of mixedflow pump impellers ［J］. Chinese Journal of Mechanical Engineering, 2013(3): 469-473.
［3］ BING Hao, CAO Shu-liang, HE Chenglian. Experimental study of the effect of blade tip clearance and blade angle error on the performance of mixedflow pump ［J］. Science China :Technological Sciences, 2013(1): 293-296.
［4］ 韩小林, 冯峰, 石岩峰. 叶轮参数对 020Q84 喷水推进轴流泵性能的影响 ［J］. 船舶工程, 2009(1): 13-14.
HAN Xiao-lin. FENG Feng, SHI Yan-feng. The effect of impeller parameters on the performance of waterjet axial flow pump ［J］. Ship Engineering, 2009(1): 13-14.(in Chinese)
［5］李铜桥, 宋少雷, 舒春英. 叶轮参数对喷水推进泵性能及内流场影响分析 ［J］. 水泵技术, 2013(3): 27-29.
LI Tong-qiao, SONG Shao-lei, SHU Chun-ying. Influence of impeller parameters on the performance and internal flow field of waterjet pump ［J］. Pump Technology, 2013 (3):27-29. (in Chinese)
［6］ 刘承江, 王永生, 王立祥. 采用CFD方法的喷水推进轴流泵导叶整流性能改进研究 ［J］. 船舶力学, 2010,14(5): 466-470.
LIU Cheng-jiang, WANG Yong-sheng, WANG Li-xiang. Research on commutating effect optimization of waterjet axial flow pump stator based on CFD method ［J］. Journal of Ship Mechanics, 2010,14(5): 466-470.(in Chinese)
［7］ TANG Fangping, WANG Guo-qiang. Influence of outlet guide vanes upon performances of waterjet axial flow pump ［J］. Journal of Ship Mechanics, 2008(4): 19-25.
［8］ 关醒凡. 轴流泵和斜流泵［M］. 北京: 中国宇航出版社, 2009: 3-25.
［9］ 郭然, 贾力平, 樊小莉, 等. NUMECA系列教程 ［M］. 北京: 机械工业出版社, 2013: 28-46.
PDF(697 KB)
