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[1]魏 鑫,金 峰,刘天依,等.SABRE空气预冷器流动与换热数值研究[J].火箭推进,2019,45(05):8-16.
　WEI Xin,JIN Feng,LIU Tianyi,et al.Numerical study on flow and heat transfer of air precooler in SABRE[J].Journal of Rocket Propulsion,2019,45(05):8-16.
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SABRE空气预冷器流动与换热数值研究

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 45 期数: 2019年05期 页码: 8-16 栏目: 研究与设计 出版日期: 2019-10-30
Title:
Numerical study on flow and heat transfer of air precooler in SABRE
文章编号:
1672-9374(2019)05-0008-09
作者:
魏 鑫; 金 峰; 刘天依; 吉洪湖
(南京航空航天大学 能源与动力学院,江苏 南京 210016)
Author(s):
WEI Xin;  JIN Feng;  LIU Tianyi;  JI Honghu
(College of Energy and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
关键词:
预冷器;  超临界氦气;  平均换热系数;  总压损失
Keywords:
precooler;  supercritical helium;  average heat transfer coefficient;  total pressure loss coefficient
分类号:
V438.1
文献标志码:
A
摘要:
为了掌握吸气式火箭发动机(SABRE)空气预冷器的流动换热特性,为设计相应类型的预冷器提供技术基础,针对SABRE预冷器最小周期性单元,以数值方法研究了管间距、管排数、空气入射角度及氦气/空气热容量比对预冷器流动换热的影响。研究结果表明:增大管排数和减小管间距,能够增大预冷器换热功率,降低空气出口温度,但会降低空气侧、氦气侧平均换热系数,减弱对流换热能力,增大空气侧总压损失。空气入射角度对空气侧、氦气侧换热影响微小,但对空气侧总压恢复系数影响显著。增大氦气/空气热容量比能够降低空气侧总压损失,增大空气侧、氦气侧平均换热系数,降低空气出口温度。
Abstract:
In order to study the flow and heat transfer characteristics of air precooler in Synergistic Air-Breathing Rocket Engine(SABRE)and provide the technical basis for designing precooler, the effects of tube pitch, tube row, air incidence angle and helium/air heat capacity ratio on the flow and heat transfer of air precooler were numerically studied.The results show that increasing the number of tube rows and reducing the tube spacing can increase the heat transfer power of the precooler and reduce the air outlet temperature.However, they also reduce the average heat transfer coefficient on the air side and helium side, weaken the convective heat transfer coefficient and increase the total pressure loss coefficient of air side.The air incidence angle has little effect on the heat transfer of both sides, but has a significant effect on the total pressure recovery coefficient of air side.Increasing the helium/air heat capacity ratio can reduce the total pressure loss coefficient on the air side, increase the average heat transfer coefficient on both sides, reduce the air outlet temperature and enhance the pre-cooling effect.

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备注/Memo

收稿日期:2019-01-05; 修回日期:2019-03-28作者简介:魏 鑫(1992—),男,硕士,研究领域为高超音速热防护及热管理

更新日期/Last Update: 2019-10-25