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液态LBE介质轴流泵压力脉动特性数值研究 认领

Numerical Study on Pressure Pulsation Characteristics of Liquid LBE Medium Axial-Flow Pump
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摘要 基于雷诺时均N-S方程和重整化群(RNG)k-ε湍流模型,研究分析了轴流泵在常温清水和液态铅-铋合金(LBE)介质下的水力性能和压力脉动特性及其分布规律。结果表明:按照常温清水介质水力设计方法及相关经验系数完成的轴流泵的水力设计方案,在LBE介质条件下,泵扬程和效率相对有所提高,随着流量增大,扬程明显增加;泵内边界层脱流现象明显减弱;泵叶轮进口监测点的压力系数脉动主频为81 Hz,与叶片转频相等,在2倍以及3倍叶频处出现次频谐波;介质粘性的差异不影响叶轮进口处的压力脉动系数幅值,介质密度即惯性力与泵叶轮进口压力脉动幅值呈线性正相关。 Base on the Reynolds time averaged N-S equation and Renormalization group(RNG) k-ε two equation turbulence model, this paper studies and analyzes the hydraulic performance and the pressure fluctuation distribution characteristics of the axial-flow LBE pump in room temperature, clear water and liquid LBE. The results show that: for the hydraulic design of the axial-flow pump completed according to hydraulic design method of clear water medium and relevant empirical coefficient, under the condition of LBE medium, the head and the efficiency of the pump are improved, the head increases obviously with the increasing of the flow, and the phenomenon of flow separation in the inner boundary layer of the pump is obviously weakened under the LBE medium. The main frequency of the pressure coefficient fluctuation at the inlet monitoring point of the pump impeller is 81 hz, which is equal to the blade rotation frequency, and the second frequency harmonic occurs at two and three times of the blade frequency;the medium viscosity does not affect the pressure fluctuation coefficient amplitude at the inlet of the impeller, and the medium density, that is, the inertial force, is linearly positively related to the pressure fluctuation amplitude at the inlet of the pump impeller.
作者 王岩 余红星 郭艳磊 严明宇 隋海明 张玉龙 任云 Wang Yan;Yu Hongxing;Guo Yanlei;Yan Mingyu;Sui Haiming;Zhang Yulong;Ren Yun(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Lanzhou University of Technology,Lanzhou,730050,China)
出处 《核动力工程》 EI CAS CSCD 北大核心 2020年第3期202-207,共6页 Nuclear Power Engineering
关键词 铅-铋合金介质(LBE) 物性参数 轴流泵 水力性能 压力脉动 Lead-bismuth eutectic medium(LBE) Physical parameters Axial-flow pump Hydraulic performance Pressure fluctuation
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