排灌机械工程学报2016，Vol.34Issue(8)：679-685,7.DOI:10.3969/j.issn.1674-8530.15.0256
大型排水泵装置空化区间的数值计算
Numerical calculation on cavitation range of large-scale drainage pumps system
摘要
Abstract
To study the cavitation range of large-scale drainage pumps system,based on SST k -ωtur-bulence model,the pumps internal cavitation was described by using the Rayleigh -Plesset model, combined with the model pump experiment to verify the numerical results.Also,the emphasis was put on the distribution of cavitation,cavitation volume fraction under the same inlet water level and diffe-rent flow coefficients,and blades surface pressure distribution under the large flow conditions.The re-sults show that under the optimal conditions,when the flow coefficients(δ)are 0.8 and 1.0,blades angles of the non-cavitation ranges are -8°-0°and -8°-+6°;the cavitation range rapidly expands for lowering the inlet water level;on the contrary,the range will decrease.However,under the larger flow conditions,the more the blades angle deviation from 0°is ,the more serious the cavitation phe-nomenon is,the greater the volume fractions are.Moreover,when the water level is up to the highest flood control water level,the biggest operation flow is 28.75 m3 /s in non-cavitation conditions;and the blades surface pressure distribution will increase as the blades running angle enlarges under the large flow conditions.The results provide a reference for the stable operation of the large-scale drainage pumps system.关键词
大型排水泵装置/轴流泵/数值模拟/空化/运行水位Key words
large-scale drainage device pumps system/axial flow pumps/numerical simulation/cavita-tion/operating water levels分类
机械制造引用本文复制引用
燕浩,柴立平,李跃,李强,石海峡..大型排水泵装置空化区间的数值计算[J].排灌机械工程学报,2016,34(8):679-685,7.基金项目
国家自然科学基金资助项目（51409197）；合肥工业大学博士学位人员专项基金资助项目 （）
