类三角形堆芯子通道超临界水传热试验研究  

Experimental Investigation on Heat Transfer of Supercritical Pressure Water Flowing in Sub-Channel with Triangle Distribution in Reactors

作　　者：徐维晖[1] 马自强[1] 王为术[1] 崔强[1] 朱晓静[2] 路统 毕勤成[3] 

机构地区：[1]华北水利水电大学热能工程研究中心,郑州450011 [2]大连理工大学能源与动力学院,辽宁大连116024 [3]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《核动力工程》2017年第2期24-27,共4页Nuclear Power Engineering

基　　金：国家自然科学基金(51406026);河南省高校科技创新团队支持计划(16IRTSTHN017);河南省科技创新人才计划(154100510011)

摘　　要：针对超临界水冷堆(SCWR)堆芯垂直上升类三角形子通道,开展超临界水的流动传热试验研究。反应堆堆芯类三角形子通道棒束直径为8 mm、栅距比为1.4。试验参数范围为:热流密度q=200~800 kW/m^2、压力P=23~28 MPa、质量流速G=700~1 300 kg/(m^2×s)。分析了q、P和G等热工参数对超临界水传热特性的影响。试验结果表明:超临界压力下,壁面温度T_w随q和P的增加而升高,传热系数峰值降低;提高G能够强化超临界水的传热,G增加,T_w降低,传热系数增大;当G增大到一定的程度,改变G对传热起到强化作用的效果不如在低G下显著;当q达到800 kW/m^2时,在大比热区,T_w随焓值变化剧烈,传热系数峰值不明显;当P提高到28 MPa时,大比热区的强化传热作用被削弱。Experimental investigation on the heat transfer and flow of supercritical pressure water flowing in the sub-channel of SCWR, which was simulated by a vertical triangular channel, was conducted at the pressures of 23-28 MPa, mass fluxes of 700-1300 kg/（m^2·s） and heat fluxes on the inner wall surface of 200-800 kW/m^2, The corresponding diameter of the fuel rod is 8mm and the ratio of pitch to diameter is 1.4. The effects of heat flux, pressure and mass velocity on the heat transfer characteristics were analyzed. Experimental results showed that the wall temperature increases and the peak of heat transfer coefficient decreases with the increasing of the heat flux and pressure when other parameters remain unchanged. Improvement of mass velocity can enhance the heat transfer, which is characterized by the lower wall temperature and higher heat transfer coefficient. However the intensify effect of mass velocity on the heat transfer performance is not obvious when it reaches a certain level. The wall temperature varies dramatically with the increasing of the enthalpy and the peak heat transfer coefficient is much lower than that of the lower heat flux when the heat flux reaches 800 kW/m2. And the enhanced heat transfer that usually appears in the large specific heat region is greatly weakened when the pressure rises up to 28 MPa.

关 键 词：超临界水 三角形子通道 传热特性 试验研究 

分 类 号：TK124[动力工程及工程热物理—工程热物理]