通道振动频率对超临界正癸烷裂解流动换热影响的数值研究

doi:10.11949/0438-1157.20240815

摘要/Abstract

摘要：

振动冷却通道内超临界正癸烷的裂解吸热流动过程因同时存在流场、温度场和物性场等多物理场间耦合作用，流动换热过程十分复杂。基于正癸烷裂解总包反应模型，对矩形振动通道内超临界正癸烷裂解流动换热过程进行数值研究，系统讨论通道振动频率对再生冷却通道流动换热性能的影响规律和作用机制。计算结果显示，通道振动会加强内部流体掺混，通道内二次流动随振动频率提高而增强，高频率振动引发的横向剪切对流体边界层产生扰动，使热侧近壁面边界层减薄，热壁的物理换热过程增强。然而，增强的物理换热降低了热壁表面正癸烷温度，使正癸烷裂解反应被推迟，化学热沉释放被延迟。不同振动频率下，裂解反应均在L/D>100处开始发生，在L/D=130处接近裂解反应速率峰值。与静止通道相比，振动通道热壁表面温度、传热系数及热壁表面正癸烷质量分数均呈不同特征的周期分布。研究结果可为运动通道内包含化学吸热反应的流动换热问题提供参考。

关键词: 超临界正癸烷, 通道振动, 对流, 化学反应, 计算流体力学

Abstract:

The pyrolysis endothermic flow process of supercritical n-decane in the vibration cooling channel is very complicated due to the coupling of multiple physical fields including flow field, temperature field and physical property field. Based on the total package reaction model of n-decane cracking, a numerical study was conducted on the flow heat transfer process of supercritical n-decane cracking in a rectangular vibration channel, and the influence of channel vibration frequency on the flow heat transfer performance of the regeneration cooling channel and its mechanism were systematically discussed. The calculation results show that the channel vibration will strengthen the internal fluid mixing, the secondary flow in the channel will increase with the increase of vibration frequency, and the lateral shear caused by high frequency vibration will disturb the fluid boundary layer, thinning the boundary layer near the wall of the hot side, and strengthening the physical heat transfer process of the hot wall. However, the enhanced physical heat transfer reduces the n-decane temperature on the hot wall surface, delaying the n-decane cracking reaction and the release of chemical heat sink. Under different vibration frequencies, the cracking reaction starts at L/D>100, and reaches the highest cracking reaction rate at L/D=130. Compared with the static channel, the surface temperature, heat transfer coefficient and mass fraction of n-decane on the hot wall surface of the vibrating channel have different characteristics of periodic distribution. The research results can provide reference for the flow heat transfer problem involving chemical endothermic reaction in the movement channel.

Key words: supercritical n-decane, channel vibration, convection, chemical reaction, computational fluid dynamics

中图分类号:

TQ 021.3

黄娜, 蒋云龙, 王东涵, 吴明婷, 蒋雪莉, 钟豫. 通道振动频率对超临界正癸烷裂解流动换热影响的数值研究[J]. 化工学报, 2025, 76(1): 173-183.

Na HUANG, Yunlong JIANG, Donghan WANG, Mingting WU, Xueli JIANG, Yu ZHONG. Numerical study of influence of channel vibration frequency on flow and heat transfer of supercritical n-decane with pyrolysis reaction[J]. CIESC Journal, 2025, 76(1): 173-183.

图/表 15

图1 再生冷却结构及单通道简化模型

Fig.1 Regenerative cooling structure and simplified model of single channel

图2 横截面及纵截面网格示意图

Fig.2 Schematic diagram of the cross-section and longitudinal section mesh

图3 网格无关性验证

Fig.3 Grid-independent validation

图4 超临界正癸烷物理性质

Fig.4 Physical property of supercritical n-decane

图5 裂解传热数值模型验证

Fig.5 Validation on numerical model of flow and heat transfer with cracking reaction

图6 通道振动数值方法验证

Fig.6 Method verification method of channel vibration

图7 通道振动示意图

Fig.7 The schematic diagram of the channel vibration

图8 不同振动频率对温度场分布的影响

Fig.8 Effect of different vibration frequencies on the temperature field distribution

图9 热壁表面正癸烷质量分数

Fig.9 n-decane mass fraction on the hot wall surface

图10 Gr/Re2值分布

Fig.10 Distribution of Gr/Re2

图11 不同通道振动频率下Se分布

Fig.11 Se under different vibration frequencies

图12 不同振动频率下流线分布

Fig.12 Streamline under different vibration frequencies

图13 L/D=130截面处不同振动频率边界层内参数分布

Fig.13 Border layer parameter distribution under different vibration frequencies at L/D=130

图14 L/D=130截面处不同振动频率下内部边界层区参数分布

Fig.14 Parameter distribution of internal boundary layer region under different vibration frequencies at L/D=130

表1 不同振动频率下综合流动换热性能比较

Table 1 Comparison of comprehensive flow heat transfer performance under different vibration frequencies

振动频率/Hz	Nu_v/Nu_s		f_v/f_s		η
50	0.894	—	1.264	—	0.827	—
100	1.070	+0.20	1.365	+0.08	0.965	+0.17
200	1.243	+0.16	1.647	+0.21	1.052	+0.09
400	1.405	+0.13	2.013	+0.37	1.094	+0.04

参考文献 30

1	Huang D, Li W. Heat transfer deterioration of aviation kerosene flowing in mini tubes at supercritical pressures[J]. International Journal of Heat and Mass Transfer, 2017, 111(1): 266-278.
2	Yi B D, Xiao K Y, Guang S C, et al. Review of control and guidance technology on hypersonic vehicle[J]. Chinese Journal of Aeronautics, 2022, 35(7): 1-18.
3	周红梅, 于胜春, 李昊, 等. 冲压发动机燃烧室内的压强振荡研究[J]. 飞航导弹, 2006(4): 44-47.
	Zhou H M, Yu S C, Li H, et al. Study on the pressure oscillation in the combustion chamber of the stamping engine[J]. Flying Missile, 2006(4): 44-47.
4	王兆文, 周冬, 梁刚, 等. 大型船用柴油机活塞多腔振荡冷却的强化机制[J]. 内燃机学报, 2021, 39(4): 367-376.
	Wang Z W, Zhou D, Liang G, et al. Enhanced cooling mechanism of piston multi-cavity oscillation cooling in a large marine diesel engine[J]. Journal of Internal Combustion Engine, 2021, 39(4): 367-376.
5	Setareh M, Saffar-Avval M, Abdullah A. Experimental and numerical study on heat transfer enhancement using ultrasonic vibration in a double-pipe heat exchanger[J]. Applied Thermal Engineering, 2019, 159: 113867.
6	Ji J D, Zhang J W, Li F Y, et al. Numerical research on vibration-enhanced heat transfer of improved elastic tube bundle heat exchanger[J]. Case Studies in Thermal Engineering, 2022, 33: 101936.
7	傅佳宏, 肖奔, 张宇, 等. 振动激励下的封闭通道流动传热特性实验研究[J]. 热科学与技术, 2020, 19(3): 220-225.
	Fu J H, Xiao B, Zhang Y, et al. Experimental research on flow and heat transfer characteristics in closed channel under vibration excitation[J]. Thermal Science and Technology, 2020, 19(3): 220-225.
8	Zheng Y, Chen J Y, Shang Y, et al. Numerical analysis of the influence of wall vibration on heat transfer with liquid hydrogen boiling ﬂow in a horizontal tube[J]. International Journal of Hydrogen Energy, 2017, 42: 30804-30812.
9	Zhang W Y, Yang W W, Jiao Y H, et al. Numerical study of periodical wall vibration effects on the heat transfer and fluid flow of internal turbulent flow[J]. International Journal of Thermal Sciences, 2022, 173: 107367.
10	Liu W J, Yang Z, Zhang B, et al. Experimental study on the effects of mechanical vibration on the heat transfer characteristics of tubular laminar flow[J]. International Journal of Heat and Mass Transfer, 2017, 115: 169-179.
11	Tian S, Barigou M. An improved vibration technique for enhancing temperature uniformity and heat transfer in viscous fluid flow[J]. Chemical Engineering Science, 2015, 123: 609-619.
12	Mohammed A M, Kapan S, Sen M, et al. Effect of vibration on heat transfer and pressure drop in a heat exchanger with turbulator[J]. Case Studies in Thermal Engineering, 2021, 28: 10168.
13	昝浩. 外部振动条件下再生冷却系统不稳定流动换热研究[D]. 哈尔滨: 哈尔滨工业大学, 2020.
	Zan H. Research on unsteady flow and heat transfer characteristics for regenerative cooling system under external vibration condition[D]. Harbin: Harbin Institute of Technology, 2020.
14	Zuo Y, Huang H R, Fu Y C, et al. Vibration effects on heat transfer characteristics of supercritical pressure hydrocarbon fuel in transition and turbulent states[J]. Applied Thermal Engineering, 2023, 219: 119617.
15	刘书博, 赵东升, 杨懿. 高超声速飞行器热防护与热管理综合分析方法[J]. 飞机设计, 2023, 43(4): 32-36.
	Liu S B, Zhao D S, Yang Y. Comprehensive analysis method of thermal protection and management design of hypersonic vehicles[J]. Aircraft Design, 2023, 43(4): 32-36.
16	刘小勇, 王明福, 刘建文, 等. 超燃冲压发动机研究回顾与展望[J]. 航空学报, 2024, 45(5): 226-252.
	Liu X Y, Wang M F, Liu J W, et al. Review and prospect of research on scramjet[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(5): 529878.
17	章思龙, 秦江, 周伟星, 等. 高超声速推进再生冷却研究综述[J]. 推进技术, 2018, 39(10): 2177-2190.
	Zhang S L, Qin J, Zhou W X, et al. Review on regenerative cooling technology of hypersonic propulsion[J]. Journal of Propulsion Technology, 2018, 39(10): 2177-2190.
18	Ward T A, Ervin J S, Shafer L, et al. Pressure effects on flowing mildly-cracked n-decane[J]. Journal of Propulsion and Power, 2005, 21(2): 344-355.
19	Ward T A, Ervin J S, Striebich R C, et al. Simulations of flowing mildly-cracked normal alkanes incorporating proportional product distributions[J]. Journal of Propulsion & Power, 2004, 20(3): 394-402.
20	黄晓峰, 刘朝晖, 杨帆. 高密度碳氢燃料JP-10流动换热及热裂解结焦试验研究[J]. 化工学报, 2024, 75(8): 2917-2928.
	Huang X F, Liu Z H, Yang F. Experimental investigation of high-density hydrocarbon fuel JP-10 on heat transfer and pyrolysis characteristics[J]. CIESC Journal, 2024, 75(8): 2917-2928.
21	姚通, 钟北京. 正癸烷热解的小规模化学动力学机理模型[J]. 物理化学学报, 2013, 29(7):1385-1395.
	Yao T, Zhong B J. Small-scale chemical kinetic mechanism models for pyrolysis of n-decane[J]. Acta Physico-Chimica Sinica, 2013, 29(7): 1385-1395.
22	裴晓晨. 能效评价用混合物热物性参数的简化计算方法[D]. 北京: 华北电力大学, 2023.
	Pei X C. Simplified calculation method for thermal property parameters of mixtures for energy efficiency evaluation[D]. Beijing: North China Electric Power University, 2023.
23	张兆顺, 崔桂香. 流体力学[M]. 3版. 北京: 清华大学出版社, 2015.
	Zhang Z S, Cui G X. Fluid Mechanics[M]. 3rd ed. Beijing: Tsinghua University Press, 2015.
24	杨世铭, 陶文铨. 传热学[M]. 4版. 北京: 高等教育出版社, 2006.
	Yang S M, Tao W Q. Heat Transfer[M]. 4th ed. Beijing: Higher Education Press, 2006.
25	毛宇飞, 曹飞, 上官燕琴. 超临界压力流体管内湍流对流传热的计算方法[J]. 化工学报, 2024, 75(8): 2821-2830.
	Mao Y F, Cao F, Shangguan Y Q. Computing method for convection heat transfer of supercritical pressure fluid in turbulent pipe flow[J]. CIESC Journal, 2024, 75(8): 2821-2830.
26	高金海, 马艳红, 洪杰, 等. 高超声速飞行器冲压燃烧室随机振动响应分析[J]. 北京航空航天大学学报, 2008, 34(8): 981-985.
	Gao J H, Ma Y H, Hong J, et al. Random vibration response analysis of hypersonic flight vehicle ramjet combustor chamber structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(8): 981-985.
27	张云峰. 高速气流作用下冲压发动机进气道壁板结构振动特性研究[D]. 哈尔滨: 哈尔滨工业大学, 2007.
	Zhang Y F. Study on vibration characteristic of ramjet inlet affected by high speed fluid flows[D]. Harbin: Harbin Institute of Technology, 2007.
28	王凯越, 王海鸥, 罗坤, 等. 壁面边界层附近高温圆柱绕流的直接数值模拟[J]. 工程热物理学报, 2024, 45(6): 1757-1762.
	Wang K Y, Wang H O, Luo K, et al. Direct numerical simulation of flow around a high-temperature cylinder near a wall boundary layer[J]. Journal of Engineering Thermophysics, 2024, 45(6): 1757-1762.
29	尹应德, 农雅善, 李远羽, 等. 扭曲管同轴套管换热器强化传热和流阻特性[J]. 化工学报, 2024, 75(10):3528-3535.
	Yin Y D, Nong Y S, Li Y Y, et al. Twisted tube coaxial casing heat exchanger strengthens the heat transfer and flow resistance characteristics[J]. CIESC Journal, 2024, 75(10):3528-3535.
30	王俊博, 谢攀, 刘志春, 等. 最小㶲损优化方法在椭圆换热管内的应用[J]. 化工学报, 2016, 67(S1): 307-311.
	Wang J B, Xie P, Liu Z C, et al. Application of energy destruction minimization in convective heat transfer optimization for elliptical tube[J]. CIESC Journal, 2016, 67(S1): 307-311.

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