农业机械学报2011，Vol.42Issue(7)：41-49,9.
两级双吸离心泵压力脉动特性
Pressure Fluctuation of a Two-stage Double-suction Centrifugal Pump
摘要
Abstract
To investigate the energy characteristics and pressure fluctuations of a two-stage double-suction centrifugal pump, the standard k - ε and RNG k - ε turbulent flow models were chosen for the steady and unsteady flow simulations at 0. 62, 0.8, 1.0,1. 1 and 1.2 designed flow rate conditions. The results showed that the second multiple frequency of the impeller rotation dominated the pressure fluctuations in the suctions. The fluctuation amplitudes for all the monitored points in suctions were very similar and the difference was less than 1 % . The second multiple frequency of the impeller rotation also dominated the pressure fluctuations on the impeller blade surfaces where the amplitude became larger than that at suctions. The blade passing frequency dominated the pressure fluctuations in the volute and the largest amplitude was at the point some distance away from the volute tongue. The amplitude of pressure fluctuation increased when the pump operation condition was deviated from the design point. In the volute tongue region, the pressure fluctuation amplitude of blade passing frequency at 1. 2 designed flow rate is 1. 25 times of the one at designed flow rate, while the ratio at 0. 62 designed flow rate is 1. 42.关键词
两级双吸离心泵/双蜗壳/压力脉动/数值模拟Key words
Two-stage double-suction centrifugal pump/ Double volute/ Pressure fluctuation/ Numerical simulation分类
机械制造引用本文复制引用
李辰光,王福军,许建中,李瑞明,王建明..两级双吸离心泵压力脉动特性[J].农业机械学报,2011,42(7):41-49,9.基金项目
国家自然科学基金资助项目(51079151)和北京市教育委员会科学研究与科研基地建设项目(20100909) （51079151）
