摘要
为研究潜水排污泵叶轮与蜗壳结构几何参数的良好匹配,提高泵的水力性能和运行效率,以某一比转数n_(s)=261的潜水排污泵为研究对象,根据蜗壳隔舌安放角度的不同,设计3种比面积调控方案.应用计算流体动力学方法对3种方案的泵内部流场进行数值计算,对比分析3种比面积调控方案下泵内部流场的速度、静压、湍动能及其耗散率分布以及蜗壳内水力损失,并通过试验验证了数值计算结果的正确性.研究结果表明:当隔舌安放角在0°~5°内变化时,比面积的变化为影响蜗壳水力性能的主要因素;设计蜗壳时,应优先保证比面积取值约为1.0;当隔舌安放角为42°~44°,比面积在1.0~1.2内变化时,潜水排污泵的运行效率基本保持恒定.研究结果可为潜水排污泵的优化设计提供一定参考.
In order to improve the hydraulic performance and operating efficiency of the pump,the good matching of geometric parameters between impeller and volute of submersible sewage pump was studied.Taking a submersible sewage pump with specific-speed n_(s)=261 as the research object,three specific area control schemes were designed according to the different placement angles of volute tongue.The internal flow field of three schemes pump was numerically calculated by computational fluid dynamics method.The velocity distribution,static pressure distribution,turbulent kinetic energy distribution,dissipation rate distribution of turbulent kinetic energy and volute hydraulic loss under three specific area control schemes were compared and analyzed,and the correctness of numerical calculation results was verified by experiments.The results show that the change of specific area is the main factor affecting the hydraulic performance of the volute when the placement angle of the tongue changes within 0°-5°.The value of specific area should be given priority to be near 1.0 when volute is designed.When the tongue placement angle is 42°-44°and the specific area varies in the range of 1.0-1.2,the operation efficiency of the submersible sewage pump remains basically constant.The research results can provide some references for the optimal design of submersible sewage pump.
作者
陈建华
周岭
张帆
房鑫
黎义斌
CHEN Jianhua;ZHOU Ling;ZHANG Fan;FANG Xin;LI Yibin(National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China;School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China)
出处
《排灌机械工程学报》
CSCD
北大核心
2022年第6期549-555,共7页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(52079058,51866009)。
关键词
潜水排污泵
叶轮
蜗壳
比面积
数值模拟
submersible sewage pump
impeller
volute
area ratio
numerical simulation
