非均匀来流对乏燃料冷却泵性能的影响  

Effects of nonuniform inflow condition on performance of spent fuel pool cooling pump

作　　者：乔翼飞 顾希垚 张芳 王岳[3] 张亮 尹俊连[1] QIAO Yifei;GU Xiyao;ZHANG Fang;WANG Yue;ZHANG Liang;YIN Junlian(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China;West-East Gas Pipeline Branch,Petro China Pipeline Company,Shanghai 200122,China;Shanghai Nuclear Engineer Research and Design Institute,Shanghai 200233,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中石油管道有限责任公司西气东输分公司,上海200122 [3]上海核工程研究设计院,上海200233

出　　处：《排灌机械工程学报》2019年第8期656-661,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51576125)

摘　　要：非能动技术核电厂中的乏燃料冷却泵进口前有弯头存在,将导致进口来流不均匀,这种非均匀来流会对泵性能产生一定的影响.采用数值模拟方法,针对乏燃料冷却泵不同来流条件下的性能曲线以及来流流场结构的演化进行对比分析.分析结果表明:非均匀来流对乏燃料冷却泵外特性影响较小,虽然泵的进口处存在较为明显的来流畸变,流场速度分布紊乱,但是乏燃料冷却泵在渐缩段及肘形进水室的结构设计可减弱来流非均匀性的影响,叶轮进口处的影响几乎不存在.由此证明乏燃料冷却泵特殊的肘形进口结构能对来流重新整合,从而降低来流对泵的性能影响,在核电厂进口管道的设计上不需采用较长的进口管段.There are elbows in the suction pipe of spent fuel pool(SFP)cooling pump in passive pressurized nuclear power plants.These existing elbows can result in nonuniform flow conditions to the pump,and subsequently can generate a certain negative impact on pump performance.The performance curves of a horizontal double-suction centrifugal SFP cooling pump and the velocity distribution at different positions in the pump were compared among different inlet flow conditions to clarify the impact based on numerical simulation methods.The results show that these nonuniform inlet flow conditions affect a little on the pump head and efficiency.Even though a noticeable distorted and disordered flow condition does occur at the inlet of the pump,its impact can be weakened by using a special entry design such as convergent section and elbow chamber to eliminate the negative impact.It is proved that the special entry design can rectify inlet flow velocity profile and depress adverse impact on the pump performance.A long suction pipe is no need to the pump in pipeline design of passive pressurized nuclear power plants.

关 键 词：乏燃料冷却泵 非均匀来流 水力特性 速度分布 

分 类 号：S227.9[农业科学—农业机械化工程] TH311[农业科学—农业工程]