【作者】 王为术； 张斌； 陈刚； 朱晓静； 毕勤成；

【Author】 WANG Wei-shu;ZHANG Bin;CHEN Gang;ZHU Xiao-jing;BI Qin-cheng;Institute of Thermal Energy Engineering, North China University of Water Resources and Electric Power;School of Energy and Power Engineering, Dalian University of Technology;State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University;

【机构】 华北水利水电大学热能工程研究中心； 大连理工大学能源与动力学院； 动力工程多相流国家重点实验室(西安交通大学)；

【摘要】 在压力23~28 MPa、质量流速700~1 300 kg/(m2×s)、热流密度200~800 kW/m2的参数范围内,对超临界水冷堆堆芯棒径D=8 mm、栅距比P/D=1.4的类三角形子通道内超临界水流动阻力特性进行了试验研究,分析了不同参数下总压降、摩擦压降随流体焓值变化规律。研究表明:超临界压力下,低焓值区总压降随焓值升高而缓慢减小,进入高焓值区后显著增大。压力和热流密度对总压降及摩擦压降的影响在低焓值区不明显;在高焓值区,压力和热流密度越大,总压降和摩擦压降越小。质量流速对摩擦压降影响较大,质量流速越高,摩擦压降越大。质量流速对压降的影响在高焓值区比低焓值区更加显著。更多还原

【Abstract】 Within the range of pressure from 23 to 28 MPa, mass flux from 700 to1300 kg/(m2·s), and l heat flux from 200 to 800 kW /m2, the flow resistance characteristics of supercritical water flowing in a sub-channel of the supercritical water-cooled reactor(SCWR) were investigated experimentally. The sub-channel was formed according to the fuel rod which the diameter is 8 mm, and the pitch-to-diameter ratio is 1.4. The effect of pressure, mass flux and heat flux on the pressure drop characteristics of supercritical water was analyzed. In the low enthalpy region, the total pressure drop decreases slightly with the bulk enthalpy increase. And then it will increases obviously in the high enthalpy region. The influence of pressure and heat flux increase on the total and frictional pressure drop is not obvious when the enthalpy approaches the pseudo-critical enthalpy; but in the high enthalpy region, the higher the pressure or heat flux is, the smaller the pressure drop is. The increase of mass flux makes the pressure drop increase obviously. The effect of mass flux on the frictional pressure drop in the high enthalpy region has a more significant influence than in the low enthalpy region.更多还原