标题： FLiBe流经百叶窗鳍片紧凑式换热器的热力学性能数值分析 显示英文标题

标题： Numerical Analysis of Thermo-Hydraulic Performance of FLiBe Flowing Through a Louvered-Fin Compact Heat Exchanger

摘要： 该研究关注熔盐LiF-BeF2（FLiBe）在熔盐反应堆（MSR）冷却回路中具有多层百叶窗翅片的紧凑换热器中的稳态热流体行为。 这项数值基准研究旨在获取反应堆中基线情况以及冷却剂循环缓慢情况下的数据。 基于百叶窗间距，进行了低雷诺数为100至500的一系列数值测试，涉及不同的翅片间距和翅片百叶窗角度。 详细研究了稳态速度分布、温度和压力场。 以Colburn j因子和Fanning摩擦因子f以及体积优良因子来报告传热系数和压降数据，以对FLiBe作为熔盐反应堆冷却剂的性能进行比较。 关于分析结果，当百叶窗角度增大时，熔盐流动变得更加百叶窗定向，这提高了翅片与熔盐之间的相互作用和传热。 相反，当翅片间距增加时，流动变得更加管道定向，减少了翅片与FLiBe的接触，导致热性能下降。 显示英文摘要

摘要： The study focuses on the steady-state thermohydraulic behavior of the LiF-BeF2 (FLiBe) molten salt flowing through a compact heat exchanger with multi louvered fins in the cooling loop of a Molten Salt Reactor (MSR). This numerical benchmark study was conducted to obtain data both for baseline and cases with slow coolant circulation problems in the reactor. A series of numerical tests are conducted for low Reynolds numbers of 100 to 500 based on the louver pitch with different fin pitches and fin louver angles. The steady-state velocity profiles, temperature, and pressure fields are studied in detail. The heat transfer coefficient and pressure drop data are reported in terms of Colburn j-factor and Fanning friction factor f, and the volume goodness factor to get a performance comparison for FLiBe as the coolant in a Molten Salt Reactor. As regards findings of the analyses, when the louver angle steeps, the molten salt flow becomes more louvered direct which improves the interaction and heat transfer between the fin and molten salt. On the contrary, when the fin pitches increase, the flow becomes duct-directed that reducing the contact between fin and FLiBe which leads to a decline in thermal performance.