哈尔滨工程大学学报Issue(3)：297-301,5.DOI:10.3969/j.issn.1006-7043.201311083
余热排出泵小破口失水事故空化特性数值分析
Numerical analysis of cavitating flow characteristics in residual heat removal pumps during the SBLOCA
摘要
Abstract
In order to investigate the internal cavitating flow characteristics of residual heat removal pumps during the small break loss of coolant accident ( SBLOCA) , the three⁃dimensional cavitating flow under high temperature and high pressure within the whole flow passages of a residual heat removal pump was simulated using the homoge⁃neous mixture cavitation model based on the Rayleigh⁃Plesset equations and the shear stress transport ( SST) turbu⁃lence model. The attenuation curves of head and efficiency and critical cavitation environmental pressure during the SBLOCA were obtained from the simulation results. The cavitation inception and development were captured as well. The simulation results showed that the vapor appears first on the suction surface of blades near the front shroud when the environmental pressure decreases to 1.15 MPa or so. The cavitation area and water vapor volume fraction increase gradually with the decrease of environmental pressure. The maximum water vapor volume fraction increases to 50.17% as the environmental pressure drops to 1.143 MPa. Moreover, the vapors appear on the pressure surface of blades and the serious blockage due to cavity in the flow passages results in a sharp drop in the pump head and reliability under severe cavitation condition. The given results about the cavitation characteristics and the derived critical cavitation environmental pressure are useful for the design of residual heat removal pumps.关键词
余热排出泵/小破口失水事故/空化/叶轮/数值分析/压力/空泡Key words
residual heat removal pump/SBLOCA/cavitation/impeller/numerical analysis/pressure/bubble分类
农业科技引用本文复制引用
洪锋,袁建平,张金凤,卢加兴,张云蕾..余热排出泵小破口失水事故空化特性数值分析[J].哈尔滨工程大学学报,2015,(3):297-301,5.基金项目
国家科技支撑计划资助项目（2011BAF14B04Z）；国家自然科学基金重点资助项目（51239005）；国家自然科学基金资助项目（51349004）． （）
