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[1]张敬旋,李光熙,南向谊,等.组合发动机微细通道氦加热器设计与流动换热[J].火箭推进,2021,47(02):9-18.
　ZHANG Jingxuan,LI Guangxi,NAN Xiangyi,et al.Design and flow heat transfer of mini-channel Helium heatexchanger in combined engine[J].Journal of Rocket Propulsion,2021,47(02):9-18.

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组合发动机微细通道氦加热器设计与流动换热

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 47 期数: 2021年02期页码: 9-18 栏目: 研究与设计出版日期: 2021-04-21

Title:: Design and flow heat transfer of mini-channel Helium heatexchanger in combined engine

文章编号:: 1672-9374(2021)02-0000-00

作者:: 张敬旋¹; 李光熙²; 南向谊²; 马元²; 唐桂华¹; 1西安交通大学热流科学与工程教育部重点实验室,陕西西安 710049 2西安航天动力研究所,陕西西安 710100

Author(s):: ZHANG Jingxuan¹; LI Guangxi ²; NAN Xiangyi ²; MA Yuan ²; TANG Guihua ¹; 1MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2Xi'an Aerospace Propulsion Institute, Xi'an 710100, China

关键词:: 氦加热器; 对流换热; 流动阻力; 数值模拟; 结构设计

Keywords:: helium heat exchanger; convection heat transfer; flow resistance; numerical simulation; structure design

分类号:: TK124

文献标志码:: A

摘要:: 氦加热器是预冷组合发动机中重要的换热器之一,其原理是利用燃气燃烧的热量提高氦气做功能力,进而提升整个循环系统运行效率。研究中首先设计了蛇形管式、瓦片式、辐射式三种微细通道氦加热器。其次,基于FLUENT15.0软件对微细通道氦加热器管内外的对流换热系数和流动阻力进行了研究。对比模拟结果和经典关联式的计算结果,确定了适用于微细通道氦加热器管内外换热和流阻的关联式。结果表明:对于管内流动换热,经典关联式预测准确,平均误差小于8%。对于管外流动换热,经典关联式对流阻的预测依然准确,但是对换热系数的预测有较大偏差,最大偏差接近50%。基于数值模拟结果拟合了新的微细通道氦加热器管外对流换热关联式,平均误差小于5%。此外,对比分析发现提出的蛇形管式微细通道氦加热器对流换热系数最大,综合性能最优。

Abstract:: Helium heat exchanger is one of the most important heat exchangers in Pre-Cooled Combined Engine. Helium heater exchanger can improve the working capacity of helium by utilizing the heat of gas to maintain system circulation. Firstly, three novel types of mini-channel heat exchangers with serpentine structures, tiled structures and radial structures were designed in this paper. Then, the flow and heat transfer performance of the novel micro-channel heat exchanger was analyzed based on the commercial software FLUENT15.0. The calculation formulas suitable for flow and heat transfer inside and outside tube of the mini-channel helium heater exchanger were examined by comparing simulation results with existing correlations. The results show that for the tube-inside, the existing classical correlations can calculate both convection heat transfer coefficient and flow resistance accurately with the average deviation below 8%. For the tube-outside, classical correlations can predict flow resistance accurately but the maximum deviation is close to 50% for the prediction of convection heat transfer coefficient in comparison with the simulation results. New correlations with average deviation less than 5% are fitted for tube-outside convective heat transfer of mini-channel helium heat exchanger. In addition, the proposed serpentine mini-channel helium heater exchanger achieves the highest convection heat transfer coefficient and comprehensive performance in the three heat exchangers.

参考文献/References:

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备注/Memo

收稿日期:2020-05-19
基金项目:国家自然科学基金(51825604); 国家自然科学基金(51721004)
作者简介:张敬旋(1993—),男,硕士,研究领域为微尺度流动传热,组合发动机换热系统。
通信作者:唐桂华(1993—),男,博士，教授，研究领域为热技术管理与强化。

更新日期/Last Update: 1900-01-01