低气压下波纹-翼型涡发生器翅片管换热器流动换热性能分析

韩潇; 刘然; 张磊; 王军伟; 李国华; 张志强; 赵佳仪; 王祥军; 代宝民

doi:10.13224/j.cnki.jasp.20230682

低气压下波纹-翼型涡发生器翅片管换热器流动换热性能分析

doi: 10.13224/j.cnki.jasp.20230682

韩潇^{1, 2,},
刘然²,
张磊²,
王军伟²,
李国华²,
张志强³,
赵佳仪³,
王祥军³,
代宝民³

1.
北京航空航天大学宇航学院，北京 100191
2.
中国空间技术研究院北京卫星环境工程研究所，北京 100094
3.
天津商业大学天津市制冷技术重点实验室，天津 300134

基金项目: 国家自然科学基金（51806151）

详细信息

作者简介:
韩潇（1981-），男，研究员，博士，研究方向为空间环境模拟技术与试验。E-mail：hxcast@163.com

中图分类号: V262.3；TK172
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出版历程
- 收稿日期: 2023-10-28
- 网络出版日期: 2024-07-01

Flow and heat transfer performance analysis of wavy fin-and-tube heat exchanger with winglet type vortex generator under low-pressure

1.
School of Astronautics，Beihang University，Beijing 100191，China
2.
Beijing Institute of Spacecraft Environment Engineering，China Academy of Space Technology，Beijing 100094，China
3.
Tianjin Key Laboratory of Refrigeration Technology，Tianjin University of Commerce，Tianjin 300134，China

摘要

摘要:
翅片管换热器被广泛应用于低气压条件下的高空飞行器舱内环境温度控制。为了研究低气压下翅片管换热器空气侧对流换热特性，以波纹-翼型涡发生器翅片管换热器为研究对象，在环境压力为5～101 kPa，入口空气流速为0.5～6 m/s的工况下，对低气压下翅片管换热器空气侧换热特性进行了数值模拟研究。研究结果表明：随着环境压力的降低，空气侧表面传热系数和压降损失均显著降低，在环境压力为25 kPa时，空气侧表面传热系数与常压下相比降低了69.9%～75.6%。提出了波纹-翼型涡发生器翅片管换热器空气侧传热因子j和摩擦因子f的预测模型，模型计算结果与模拟结果吻合度较高，平均绝对误差为4.75%和3.57%，研究可为低气压环境下翅片管式换热器的设计提供参考。
- 低气压 /
- 翅片管换热器 /
- 波纹-翼型涡发生器 /
- 压降 /
- 传热 /
- 预测模型
Abstract:
Fin-and-tube heat exchangers are widely used in cabin ambient temperature control of aircraft under low-pressure conditions. In order to study the air-side heat transfer characteristics of fin-and-tube heat exchangers under low-pressure conditions, the air-side flow heat transfer characteristics of the fin-tubed heat exchangers under low pressure were studied numerically in ambient pressure of 5—101 kPa and inlet air velocity of 0.5—6 m/s. The research results showed that with the decrease of ambient pressure, the heat transfer coefficient and pressure drop on the air-side decreased significantly. When the air pressure was 25 kPa, the convective heat transfer coefficient on the air side decreased by 69.9%—75.6% compared with that under normal pressure. Predictive models for the air-side heat transfer factor j and friction factor f of the wavy fin-and-tube heat exchanger with winglet type vortex generator were proposed. The calculation results were in good agreement with the simulation results, with mean absolute errors of 4.75% and 3.57%, respectively. This study can provide a reference for the design of fin-and-tube heat exchanger working in low pressure environment.
- low pressure /
- fin-and-tube heat exchanger /
- wavy and winglet type vortex generator /
- pressure drop /
- heat transfer /
- prediction model

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图 1 计算区域示意图（单位：mm）

Figure 1. Schematic diagram of calculation domain （unit：mm）

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图 2 计算域网格

Figure 2. Grid in calculation domain

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图 3 网格无关性验证

Figure 3. Validation of grid dependence

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图 4 数值计算结果与文献[21]报道结果对比

Figure 4. Comparison of numerical results with the revealed results in the literature [21]

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图 5 不同环境压力下的温度分布云图

Figure 5. Temperature contours under different pressure conditions

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图 6 不同环境压力的速度流线图

Figure 6. Velocity streamlines under different pressure conditions

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图 7 环境压力对表面传热系数的影响

Figure 7. Effect of ambient pressure on the heat transfer coefficients

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图 8 压降随环境压力的变化

Figure 8. Variation of pressure drop with ambient pressure

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图 9 传热因子随环境压力的变化

Figure 9. Variation of heat transfer factor with ambient pressure

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图 10 摩擦因子随环境压力的变化

Figure 10. Variation of friction factor with ambient pressure

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图 11 表面传热系数计算误差

Figure 11. Calculation error of heat transfer coefficient

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图 12 传热因子计算误差

Figure 12. Calculation error of heat transfer factor

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图 13 摩擦因子计算误差

Figure 13. Calculation error of friction factor

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表 1 波纹-翼型涡流发生器翅片管式换热器结构和运行参数

Table 1. Structure and operating parameters of wavy fin-and-tube heat exchanger with winglet type vortex generator

参数	数值
管外径D_c/mm	9.52
横向管间距P_t/mm	25.4
纵向管间距P_l/mm	22
翅片间距F_p/mm	1.23
翅片厚度δ_f/mm	0.1
空气流速v_in/（m/s）	0.5～6
管壁温度T_w/K	203.15
管束数量N_t	3
翅片导热系数λ/（W/（m·K））	237
入口空气温度T_in/K	213.15
环境压力p_a/kPa	5～101

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参考文献(21)

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