Simulation on Forced Convective Heat Transfer in Liquid Lead-Bismuth Alloy under Different Gravitational Environments
A space power system with space nuclear power technology as the core has become one of the most promising future space power systems due to its strong radiation resistance,small size,long life,and light weight.It has good development prospects and important significance.This study focuses on the forced convective heat transfer in vertical pipelines containing liquid lead-bismuth.A lattice Boltzmann model is employed,and the similarity principle is used to convert dimensional units between lattice units and real physical units.The study investigates the forced convective heat transfer characteristics of liquid lead-bismuth in vertical pipelines under different gravitational conditions.The results indicate that gravity has a significant impact on heat transfer performance.With an increase in gravity,the heat transfer characteristics of the liquid lead-bismuth alloy gradually enhances,and the axial temperature reaches a fully developed state closer to the outlet.
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