Numerical study on heat transfer performance and field synergy of methane precooler
-
摘要:
基于空天飞行器发动机模态衔接面临的高温空气冷却问题，提出以超临界压力甲烷作为冷却剂的预冷器方案，开展了甲烷进口参数和空气进口参数对换热性能影响的数值研究。阐述了通道内壁温度和传热系数的沿程变化情况。通过温度场、速度场及场协同角云图揭示了预冷器的综合换热机制。讨论了湍动能分布状况及其对换热的作用机制。定量评价了预冷器的换热性能和（火积）耗散量。通过密度比值修正Gnielinski公式实现了预冷通道的换热预测。数值结果表明：高温空气主要由预冷器外侧的通道进行冷却，空气侧观察到不均匀的速度场，出现密集的强涡流和强湍流斑团，起到改善场协同性和增强换热的作用。甲烷宜采用较低的压力，空气进口温度和甲烷流量越高，预冷器换热性能越好。新关联式对预冷通道换热的预测误差基本处于±18%范围。
Abstract:Based on the high-temperature air cooling problem faced by the modal connection of aerospace aircraft engines, a precooler scheme using supercritical-pressure methane as the coolant was proposed, and numerical studies on the effects of methane inlet parameters and air inlet parameters on heat transfer performance were conducted. The characteristics of inner-wall temperature and heat transfer coefficient along the precooled channel were analyzed. The comprehensive heat transfer mechanism of precooler was explained through the temperature field, velocity field, and field synergy angle distributions. The turbulent kinetic energy distribution and its impact mechanism on heat transfer were investigated. The heat transfer performance and entransy dissipation of precooler were quantitatively evaluated. The heat transfer prediction of precooled channel was achieved by correcting the Gnielinski formula through density ratio. Numerical results indicated that the high-temperature air was mainly cooled by the channels outside the precooler, and an uneven velocity field on the air side was observed. The appearance of local large vortexes and strong turbulent clusters played a role in improving field synergy and enhancing heat transfer. Methane should be subjected to lower pressure, and the higher air inlet temperature and methane mass flux indicated the better heat transfer performance of precooler. The new correlation formula for heat transfer prediction in the precooled channel was basically within the range of ±18%.
-
Key words:
- aerospace aircraft /
- precooled engine /
- methane precooler /
- heat transfer performance /
- field synergy
-
图 3 空气侧传热系数随空气流量的变化情况
Figure 3. Heat transfer coefficient variation with mass flux of air side
图 4 冷却剂压力对换热参数随沿程角度变化的影响
Figure 4. Effect of coolant pressure on heat transfer parameters variations along the angle
图 5 冷却剂压力对温度、速度、湍动能、协同角分布影响
Figure 5. Effect of coolant pressure on temperature, velocity, turbulent kinetic energy and synergistic angle distributions
图 7 冷却剂流量对换热参数随沿程角度变化的影响
Figure 7. Effect of coolant mass flux on heat transfer parameters variations along the angle
图 8 冷却剂流量对温度、速度、湍动能、协同角分布影响
Figure 8. Effect of coolant mass flux on temperature, velocity, turbulent kinetic energy and synergistic angle distributions
图 10 空气进口温度对换热参数随沿程角度变化的影响
Figure 10. Effect of air inlet temperature on heat transfer parameters variations along the angle
图 11 空气进口温度对温度、速度、湍动能、协同角分布影响
Figure 11. Effect of air inlet temperature on temperature, velocity, turbulent kinetic energy and synergistic angle distributions
图 12 不同空气进口温度下的换热指标
Figure 12. Heat transfer indexes at different air inlet temperatures
-
[1] MENG Bao,WAN Min,ZHAO Rui,et al. Micromanufacturing technologies of compact heat exchangers for hypersonic precooled airbreathing propulsion: a review[J]. Chinese Journal of Aeronautics,2021,34(2): 79-103. doi: 10.1016/j.cja.2020.03.028 [2] 邹正平,刘火星,唐海龙,等. 高超声速航空发动机强预冷技术研究[J]. 航空学报,2015,36(8): 2544-2562. ZOU Zhengping,LIU Huoxing,TANG Hailong,et al. Precooling technology study of hypersonic aeroengine[J]. Acta Aeronautica et Astronautica Sinica,2015,36(8): 2544-2562. (in ChineseZOU Zhengping, LIU Huoxing, TANG Hailong, et al. Precooling technology study of hypersonic aeroengine[J]. Acta Aeronautica et Astronautica Sinica, 2015, 36(8): 2544-2562. (in Chinese) [3] 徐东君,廉洁,南向谊,等. 复合印刷电路板式预冷器的热力设计与优化[J]. 火箭推进,2022,48(6): 59-68. XU Dongjun,LIAN Jie,NAN Xiangyi,et al. Thermal design and optimization of hybrid printed circuit precooler[J]. Journal of Rocket Propulsion,2022,48(6): 59-68. (in Chinese doi: 10.3969/j.issn.1672-9374.2022.06.008XU Dongjun, LIAN Jie, NAN Xiangyi, et al. Thermal design and optimization of hybrid printed circuit precooler[J]. Journal of Rocket Propulsion, 2022, 48(6): 59-68. (in Chinese) doi: 10.3969/j.issn.1672-9374.2022.06.008 [4] 李敬,赵巍,赵伟,等. 换热器预冷的空气涡轮火箭性能分析研究[J]. 工程热物理学报,2015,36(2): 302-307. LI Jing,ZHAO Wei,ZHAO Wei,et al. Performance study of air turbo rocket engine with precooler[J]. Journal of Engineering Thermophysics,2015,36(2): 302-307. (in ChineseLI Jing, ZHAO Wei, ZHAO Wei, et al. Performance study of air turbo rocket engine with precooler[J]. Journal of Engineering Thermophysics, 2015, 36(2): 302-307. (in Chinese) [5] 朱岩,马元,张蒙正. 预冷空气涡轮火箭发动机氦循环系统的参数特性[J]. 航空动力学报,2018,33(8): 2016-2024. ZHU Yan,MA Yuan,ZHANG Mengzheng. Characteristic of helium cycle system parameters for pre-cooling air turbo rocket engine[J]. Journal of Aerospace Power,2018,33(8): 2016-2024. (in ChineseZHU Yan, MA Yuan, ZHANG Mengzheng. Characteristic of helium cycle system parameters for pre-cooling air turbo rocket engine[J]. Journal of Aerospace Power, 2018, 33(8): 2016-2024. (in Chinese) [6] 高远,陈玉春,史新兴. SABRE预冷器计算模型及其在整机模型中的应用[J]. 推进技术,2021,42(11): 2485-2493. GAO Yuan,CHEN Yuchun,SHI Xinxing. SABRE precooler calculation model and its application in engine model[J]. Journal of Propulsion Technology,2021,42(11): 2485-2493. (in ChineseGAO Yuan, CHEN Yuchun, SHI Xinxing. SABRE precooler calculation model and its application in engine model[J]. Journal of Propulsion Technology, 2021, 42(11): 2485-2493. (in Chinese) [7] WANG Changsheng,ERIQitai,WANG Yong,et al. Novel three-dimensional simplified numerical simulation method of a compact precooler for hypersonic precooled air-breathing engine[J]. Applied Thermal Engineering,2023,230: 120827. doi: 10.1016/j.applthermaleng.2023.120827 [8] LI Hui,ZOU Zhengping,LIU Yumin. A refined design method for precoolers with consideration of multi-parameter variations based on low-dimensional analysis[J]. Chinese Journal of Aeronautics,2022,35(3): 329-344. [9] WANG Changsheng,ERIQitai,WANG Yong,et al. Flow and heat transfer characteristics of intake-precooler system for hypersonic precooled aero-engine[J]. Applied Thermal Engineering,2023,229: 120596. doi: 10.1016/j.applthermaleng.2023.120596 [10] 李帅,马同玲,刘洪涛,等. SABRE预冷器结构参数对其性能影响的数值分析[J]. 推进技术,2022,43(4): 200818. LI Shuai,MA Tongling,LIU Hongtao,et al. Numerical analysis of effects of pre-cooler structure parameter on its performance in SABRE[J]. Journal of Propulsion Technology,2022,43(4): 200818. (in ChineseLI Shuai, MA Tongling, LIU Hongtao, et al. Numerical analysis of effects of pre-cooler structure parameter on its performance in SABRE[J]. Journal of Propulsion Technology, 2022, 43(4): 200818. (in Chinese) [11] 罗佳茂,杨顺华,张建强,等. 换热预冷发动机预冷特性和发动机性能数值研究[J]. 航空学报,2019,40(5): 106-118. LUO Jiamao,YANG Shunhua,ZHANG Jianqiang,et al. Numerical investigation of pre-cooling characteristics of heat exchange pre-cooling engine and engine performance[J]. Acta Aeronautica et AstronauticaSinica,2019,40(5): 106-118. (in ChineseLUO Jiamao, YANG Shunhua, ZHANG Jianqiang, et al. Numerical investigation of pre-cooling characteristics of heat exchange pre-cooling engine and engine performance[J]. Acta Aeronautica et AstronauticaSinica, 2019, 40(5): 106-118. (in Chinese) [12] 罗佳茂,游进,焦思,等. 甲烷预冷器三维换热特性数值研究[J]. 航空动力学报,2024,39(8): 20220603. LUO Jiamao,YOU Jin,JIAO Si,et al. Numerical study on heat exchange performance for three-dimensional methane pre-cooler[J]. Journal of Aerospace Power,2024,39(8): 20220603. (in ChineseLUO Jiamao, YOU Jin, JIAO Si, et al. Numerical study on heat exchange performance for three-dimensional methane pre-cooler[J]. Journal of Aerospace Power, 2024, 39(8): 20220603. (in Chinese) [13] 罗佳茂,杨顺华,张建强,等. 甲烷预冷器性能及与压气机参数匹配研究[J]. 推进技术,2022,43(5): 200765. LUO Jiamao,YANG Shunhua,ZHANG Jianqiang,et al. Performance of methane pre-cooler and matching characteristics with compressor[J]. Journal of Propulsion Technology,2022,43(5): 200765. (in ChineseLUO Jiamao, YANG Shunhua, ZHANG Jianqiang, et al. Performance of methane pre-cooler and matching characteristics with compressor[J]. Journal of Propulsion Technology, 2022, 43(5): 200765. (in Chinese) [14] 玉选斐,王聪,秦江,等. 预冷吸气式发动机热力循环分析[J]. 工程热物理学报,2018,39(1): 31-37. YU Xuanfei,WANG Cong,QIN Jiang,et al. Thermodynamic analysis of precooled air breathing engine[J]. Journal of Engineering Thermophysics,2018,39(1): 31-37. (in ChineseYU Xuanfei, WANG Cong, QIN Jiang, et al. Thermodynamic analysis of precooled air breathing engine[J]. Journal of Engineering Thermophysics, 2018, 39(1): 31-37. (in Chinese) [15] 廉洁,徐东君,王秋旺,等. 复合型微细通道换热器的流动传热特性研究[J]. 工程热物理学报,2023,44(9): 2567-2571. LIAN Jie,XU Dongjun,WANG Qiuwang,et al. Study on flow and heat transfer performance of mini-channel heat exchanger[J]. Journal of Engineering Thermophysics,2023,44(9): 2567-2571. (in ChineseLIAN Jie, XU Dongjun, WANG Qiuwang, et al. Study on flow and heat transfer performance of mini-channel heat exchanger[J]. Journal of Engineering Thermophysics, 2023, 44(9): 2567-2571. (in Chinese) [16] 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(5): 8-16. WEI Xin,JIN feng,LIU Tianyi,et al. Numerical study on flow and heattransfer of air precooler in SABRE[J]. Journal of Rocket Propulsion,2019,45(5): 8-16. (in ChineseWEI Xin, JIN feng, LIU Tianyi, et al. Numerical study on flow and heattransfer of air precooler in SABRE[J]. Journal of Rocket Propulsion, 2019, 45(5): 8-16. (in Chinese) [17] 王彦红,李素芬. 方形通道内超临界碳氢燃料传热恶化数值研究[J]. 推进技术,2016,37(12): 2377-2384. WANG Yanhong,LI Sufen. Numerical study on heat transfer deterioration of supercritical hydrocarbon fuel in square channels[J]. Journal of Propulsion Technology,2016,37(12): 2377-2384. (in ChineseWANG Yanhong, LI Sufen. Numerical study on heat transfer deterioration of supercritical hydrocarbon fuel in square channels[J]. Journal of Propulsion Technology, 2016, 37(12): 2377-2384. (in Chinese) [18] LI Nan,ZHAO Yun,WANG Hao,et al. Thermal and hydraulic performance of a compact precooler with mini-tube bundles for aero-engine[J]. Applied Thermal Engineering,2022,200: 117656. doi: 10.1016/j.applthermaleng.2021.117656 [19] ZUO Qingsong,LI Qiming,YANG Xiaomei,et al. Investigation of electrically heating catalytic converter flow and temperature field performance improvement based on field synergy[J]. Energy,2023,274: 127360. doi: 10.1016/j.energy.2023.127360 [20] 郭江峰,程林,许明田. (火积)耗散数及其应用[J]. 科学通报,2009,54(19): 2998-3002. GUO Jiangfeng,CHENG Lin,XU Mingtian. Entransy dissipation number and its application to heat exchanger performance evaluation[J]. Chinese Science Bulletin,2009,54(19): 2998-3002. (in Chinese doi: 10.1360/csb2009-54-19-2998GUO Jiangfeng, CHENG Lin, XU Mingtian. Entransy dissipation number and its application to heat exchanger performance evaluation[J]. Chinese Science Bulletin, 2009, 54(19): 2998-3002. (in Chinese) doi: 10.1360/csb2009-54-19-2998 -
下载:
点击查看大图
计量
- 文章访问数: 339
- HTML浏览量: 173
- PDF量: 32
- 被引次数: 0