螺距对星形螺旋燃料棒束通道内流动与传热特性的影响  

Influence of Pitch of Flow and Heat Transfer Characteristics in Helical Cruciform Fuel Bundles

作　　者：李惠悦 卢涛[1] 王婧婕 LI Huiyue;LU Tao;WANG Jingjie(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《青岛科技大学学报（自然科学版）》2022年第5期94-100,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51776014)。

摘　　要：采用SST k-ω湍流模型对不同螺距的星形螺旋燃料棒束通道内流动换热特性进行数值模拟研究。分析了燃料棒螺距对棒束通道内冷却剂的速度、压力、温度分布、搅混特性及换热特性的影响。结果表明,冷却剂在星形螺旋结构的诱导下产生横向流动,增强了搅浑作用。随着螺距的减小,冷却剂横向流动速度增大,压力降增大,流体换热Nu数增大,流体换热性能提高。The flow and heat transfer characteristics of the helical cruciform fuel bundle with different pitchs were numerically simulated by using the SST k-ω turbulence model. The effects of the pitch on the velocity, pressure drop, temperature distribution, mixing characteristics and heat transfer characteristics of the coolant in the bundle were analyzed. Results show that the lateral velocity of the coolant is mainly caused by the helical cruciform structure. The lateral flow velocity, the pressure drop and Nu number increase with the decreasing of the fuel rod pitch.

关 键 词：星形螺旋燃料棒 螺距 SST k-ω模型 换热特性 

分 类 号：TL33[核科学技术—核技术及应用]