Study on the configuration and structure of higher-capacity flux-concentration type electromagnetic pump

本研究项目的目的是对我们提出的磁通浓度型电磁泵的特性进行数值分析，并检验仿真模型在快增殖反应堆中作为钠泵的性能。1.双励磁结构的磁通浓度型电磁泵的设计为了提高磁通浓度型电磁泵的性能，提出了一种新型的具有双励磁结构的磁通浓度型电磁泵。在设计中，对热辐射、线圈连接、液态金属风道形状、流体动力阻力、结构骨架等方面进行了探讨。2.采用铀合金作为液态金属进行基本性能测试采用具有导电性的铀合金(S=2.31^&lt；**&gt；10^6)进行的实验结果表明，压力是常规结构的1.2倍。3.In-Na电磁脉冲的分析和研究我们可以得到合理的In-Na特性测试计算结果。基于计算结果的估算表明，钠内测试电磁脉冲的压力是常规电磁脉冲的1.8倍。4.钠内特性测试为了确认钠的性能，在动力堆和核燃料开发公司支持的液钠循环系统中进行了测量。在400V和27A条件下，泵的最大流量约为520 L/min，扬程约为2.6 kg/cm~2，泵的最大效率约为11%，是常规型小型电磁泵的2倍。

The purpose of the research project is to analyze numerically the characteristics of the flux concentration type electromagnetic pump (EMP) proposed by us and examined the performances of the simulation model as the sodium pump in a fast breeder reactor.1.Design of a flux concentration type electromagnetic pump with double-excitation structureFor EMP with higher capacity, we proposed a new flux-concentration type EMP that has the double excitation structure. In design, we discussed the the heat radiation, coil connection, duct shape for liquid metal, hydro-dynamic resistance, and framework in structure.2.Fundamental characteristics test by using U-alloy as liquid metalThe experimental results by using U-alloy with conductivity (s=2.31^<**>10^6) shows that the pressure is 1.2 times higher compared the conventional type. And we confirmed that the characteristic becomes effective for metal with higher conductivity as sodium.3.Analysis and investigation of in-sodium EMPWe can obtain the reasonable calculated results for in-sodium characteristics tests. The estimation based on the calculated results shows that the in-sodium testing EMP has 1.8 times pressure as high as the conventional one.4.In-Sodium characteristics testTo confirm the performace for sodium, the measurement was carried out in the circulating system for liquid sodium supported by the Power Reactor and Nuclear Fuel Development Corporation. The maximum flow rate and pump head were about 520 l/min, and about 2.6 kg/cm^2 respectively under the condition of 400V and 27A.The maximum efficiency of the pump was about 11 % and it was 2 times larger than that of conventional type small-size electromagnetic pumps.