航天推进技术研究院主办
[1]于溪尧,李楠,姜淼,等.预冷器入口流量周向不均匀性对流动换热的影响[J].火箭推进,2024,50(02):39-48.[doi:10.3969/j.issn.1672-9374.2024.02.004]
YU Xiyao,LI Nan,JIANG Miao,et al.Effect of circumferential non-uniformity of inlet flow on flow and heat transfer in a precooler[J].Journal of Rocket Propulsion,2024,50(02):39-48.[doi:10.3969/j.issn.1672-9374.2024.02.004]
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YU Xiyao,LI Nan,JIANG Miao,et al.Effect of circumferential non-uniformity of inlet flow on flow and heat transfer in a precooler[J].Journal of Rocket Propulsion,2024,50(02):39-48.[doi:10.3969/j.issn.1672-9374.2024.02.004]
预冷器入口流量周向不均匀性对流动换热的影响
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
50
期数:
2024年02期
页码:
39-48
栏目:
目次
出版日期:
2024-05-30
- Title:
- Effect of circumferential non-uniformity of inlet flow on flow and heat transfer in a precooler
- 文章编号:
- 1672-9374202402-0039-10
- Keywords:
- precooler; non-uniformity; heat transfer; multidimensional coupling; deflector
- 分类号:
- TK124
- 文献标志码:
- A
- 摘要:
- 空气预冷器可在短时间内降低进入压气机的空气温度,提高增压比,增加发动机推力。预冷器入口流量周向不均匀性会导致预冷降温不均匀,对预冷发动机循环效率产生重要影响。以某预冷发动机运行参数为参考,合理简化预冷器物理模型,建立了二维流场和三维管束单元耦合换热模型,实现了预冷器的全尺寸模拟。分析了预冷器导流外壳几何参数对流动的影响,明确了空气流经管束的流动机理,优化了导流结构参数,进出口压差降低13.1%,减阻效果显著。分析了入口流量不均匀对流场不均匀的影响,入口流量较多地分配到区域4管束处。来流空气在区域1形成的流动死区对空气产生阻碍,增大了区域1处单元管束的入射角度。分析了预冷器流量均匀性和空气流入角度等对流动换热性能的影响,明确了大温差微细管束换热器耦合动态换热机理,发现预冷器总换热量最大偏差为2.45%,因此可以忽略预冷器入口截面上流量周向不均匀对预冷器传热的影响。
- Abstract:
- The air pre-cooler is capable of reducing the air temperature entering the compressor at a short time, increasing the pressure ratio and the thrust. The circumferential non-uniformity of the pre-cooler inlet flow leads to non-uniformity cooling, which has an important effect on the efficiency of the pre-cooled engine cycle. Referring to the operating parameters of a pre-cooled engine, the physical model of the precooler is properly simplified, and the coupled computational method of two-dimensional flow field and three-dimensional tube bundle unit is proposed, and then a full-scale simulation of the precooler is carried out. The effects of geometric parameters of the precooler flow deflector are discussed, and the optimized parameters of flow deflector are obtained, which reduces the pressure drop by 13.1%. The effects of inlet flow circumferential non-uniformity on the flow field are discussed, and the inlet flow is more distributed to the tube bundle in the 4th region. The flow dead zone formed by the incoming air in the 1st region impedes the flow and increases the inlet angle of the unit tube bundle in the 1st region. The effects of flow uniformity and air inflow angle on heat transfer performance are discussed, and the coupling heat transfer mechanism of the microtube bundle heat exchanger with large temperature difference is revealed. The maximum deviation of the total heat transfer for the precooler is 2.45%, so the impact of air circumferential non-uniformity at the precooler inlet on the heat transfer of precooler can be neglected.
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相似文献/References:
[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.
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(02):8.
备注/Memo
收稿日期:2023- 09- 21 修回日期:2023- 10- 27
基金项目:国家自然科学基金(51825604, 51721004)
作者简介:于溪尧(1999—),男,硕士,研究领域为传热传质。
更新日期/Last Update:
1900-01-01