哈尔滨工程大学学报2023，Vol.44Issue(12)：2185-2191,7.DOI:10.11990/jheu.202309019
核动力航天器管壳式换热器换热特性分析
Heat transfer characteristics of shell and tube heat exchangers for nuclear-powered spacecraft
摘要
Abstract
To study the heat transfer characteristics of alkali metal shell and tube heat exchangers required for nu-clear-powered spacecraft,we designed a heat exchange structure and simulated and analyzed its heat transfer and flow characteristics using the fluid-structure coupled heat transfer method.The heat transfer characteristics under different cold and hot fluid pipeline layouts were also investigated.Coupled heat transfer by different fluid domains is realized using the mesh assembly method of structured and unstructured grids.The comparative analysis of K,Na,and NaK fluid channels showed that when the heat exchanger power was megawatt class,the selection of the Na working fluid as the coolant was suitable.The optimized design of the fluid pipeline showed that the heat trans-fer capacity of the optimized pipeline layout structure was higher without changing the volume of the cold and hot fluid heat exchange space.Furthermore,the cooling efficiency was higher when the low-temperature and high-tem-perature fluid velocities were lower and higher,respectively.This study provides a scientific reference for designing and developing heat exchangers for nuclear-powered spacecraft.关键词
空间核动力/管壳式换热器/碱金属工质/Cheng Tak模型/仿真分析/耦合换热/优化设计/湍动能分析Key words
space nuclear power/shell and tube heat exchanger/alkali metal coolant/Cheng Tak model/simula-tion analysis/coupled heat transfer/optimized design/turbulence energy analysis分类
能源科技引用本文复制引用
李增恩,张昊春,赵姝婷,张诚..核动力航天器管壳式换热器换热特性分析[J].哈尔滨工程大学学报,2023,44(12):2185-2191,7.基金项目
国家重点研发计划(2020YFB1901800). （2020YFB1901800）
