超临界态碳氢燃料流固耦合传热及热裂解的计算方法研究

推进技术 ›› 2014, Vol. 35 ›› Issue (12): 1639-1644.

超临界态碳氢燃料流固耦合传热及热裂解的计算方法研究

赵国柱^1,2,宋文艳¹,张若凌²

西北工业大学动力与能源学院，陕西西安 710072; 中国空气动力研究与发展中心高超声速冲压发动机技术重点实验室，四川绵阳 621000,西北工业大学动力与能源学院，陕西西安 710072,中国空气动力研究与发展中心高超声速冲压发动机技术重点实验室，四川绵阳 621000

发布日期:2021-08-15
作者简介:赵国柱(1982—)，男，博士生，研究领域为超燃冲压发动机热防护。

Numerical Method Development for Conjugated Heat Transfer of Hydrocarbon Fuel with Thermal Cracking at Supercritical Conditions

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China; Science and Technology Laboratory on Scramjet，CARDC，Mianyang 621000，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China and Science and Technology Laboratory on Scramjet，CARDC，Mianyang 621000，China

Published:2021-08-15

摘要/Abstract

摘要： 为深入研究主动再生冷却机理，采用固体热传导方程和流体控制方程，建立了超临界态碳氢燃料耦合传热及热裂解的数值方法。对两种实验状态下电加热管内RP-3航空煤油的耦合传热及热裂解过程进行了计算研究，其中RP-3的热裂解反应由包含1个总体反应和23个二次反应的Modified Kumar-Kunzru反应机理模拟。两种状态下计算得到的外壁温、燃料温度、RP-3裂解率以及裂解产物分布与测量值的最大误差分别小于10%和15%。计算与实验结果吻合较好，表明建立的数值方法是准确的，可以作为研究超临界态碳氢燃料耦合传热及热裂解特性的有效计算分析工具。

关键词: 数值方法；耦合传热；超临界态；热裂解；碳氢燃料

Abstract: In order to study the actively regenerative cooling mechanism，a numerical method of conjugated heat transfer of hydrocarbon fuel with thermal cracking at supercritical conditions was established based on the solid thermal conduct equation and the fluid governing equations. The conjugated heat transfer behaviors of RP-3 aviation kerosene with thermal cracking inside electrically heated tube have been conducted under two different experimental conditions. The Modified Kumar-Kunzru chemical kinetics model consisting of one primary reaction and twenty-three secondary reactions was used to simulate the thermal cracking process. It is found that the maximum calculation error concerning the outer wall temperature，fuel temperature，RP-3 pyrolysis rate and cracked products yields is less than 10% and 15% under the two states，respectively. The good agreement between calculation and measurement indicates that the numerical method can be used as an effective tool to investigate the conjugated heat transfer and thermal cracking mechanisms of hydrocarbon fuel at supercritical conditions.

Key words: Numerical method; Conjugated heat transfer; Supercritical conditions; Thermal cracking; Hydrocarbon fuel

赵国柱,宋文艳,张若凌. 超临界态碳氢燃料流固耦合传热及热裂解的计算方法研究[J]. 推进技术, 2014, 35(12): 1639-1644.

ZHAO Guo-zhu^1,2,SONG Wen-yan¹,ZHANG Ruo-ling². Numerical Method Development for Conjugated Heat Transfer of Hydrocarbon Fuel with Thermal Cracking at Supercritical Conditions[J]. Journal of Propulsion Technology, 2014, 35(12): 1639-1644.

参考文献

[1] Edwards T. Liquid Fuels and Propellants for Aerospace Propulsion:1903-2003[J]. Journal of Propulsion and Power, 2003, 19(6): 1089-1107.
[2] Jackson T A, Eklund D R, Fink A J. High Speed Propulsion Performance Advantage of Materials[J]. Journal of Materials Science, 2004, 39: 5905-5913.
[3] Fan X J, Yu G, Li J G, et al. Combustion and Ignition of Thermal Cracked Kerosene in Supersonic Model Combustors[J]. Journal of Propulsion and Power, 2007, 23: 317-324.
[4] Edwards T. Cracking and Deposition Behavior of Supercritical Hydrocarbon Aviation Fuels[J]. Combustion Science and Technology, 2006, 178: 307-334.
[5] Andresen J M, Strohm J J, Sun L, et al. Relationship Between the Formation of Aromatic Compounds and Solid Deposition During Thermal Degradation of Jet Fuels in the Pyrolytic Regime[J]. Energy & Fuels, 2001, 15: 714-723.
[6] Li X F, Huai X L, Cai J, et al. Convective Heat Transfer Characteristics of China RP-3 Aviation Kerosene at Supercritical Pressure[J]. Applied Thermal Engineering, 2011, 31: 2360-2366.
[7] 蒋劲. 再生冷却超燃冲压发动机燃烧室热结构分析与设计研究[D]. 西安: 西北工业大学, 2011.
[8] Ward T A, Ervin J S, Striebich R C, et al. Simulations of Flowing Mildly-Cracked Normal Alkanes Incorporating Proportional Product Distribution[J]. Journal of Propulsion and Power, 2004, 20(3): 394-402.
[9] Zhong F Q, Fan X J, Yu G, et al. Heat Transfer of Aviation Kerosene at Supercritical Conditions[J]. Journal of Thermophysics and Heat Transfer, 2009, 23(3): 543-550.
[10] 阮波, 孟华. 碳氢燃料裂解吸热反应及超临界传热现象数值模型的构建与验证[J]. 航空学报, 2011, 32(12): 2220-2226.
[11] 侯凌云, 孙大鹏, 董宁, 等. 矩形槽道内煤油热裂解过程数值研究[C]. 杭州:中国工程热物理学会(燃烧学),2011.
[12] Jiang R P, Liu G Z, Wang X Q, et al. Thermal Cracking of Hydrocarbon Aviation Fuels in Regenerative Cooling Microchannels[J]. Energy & Fuels, 2013, 27:2563-2577.
[13] Menter F R. Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications[J]. AIAA Journal, 1994, 32(8): 1598-1605.
[14] 张强, 刘巨保, 赵晓荣. 换热管流固耦合传热的分区求解数值算法[J]. 科学技术与工程, 2010, 28(10): 6907-6911.
[15] Yu J, Eser S. Kinetics of Supercritical-Phase Thermal Decomposition of C10-C14 Normal Alkanes and Their Mixtures[J]. Industrial & Engineering Chemistry Research, 1997, 36(3): 579-591.
[16] 张磊, 乐嘉陵, 张若凌, 等. 超临界压力下湍流区碳氢燃料传热研究[J]. 推进技术, 2013, 34(2): 225-229.(ZHANG Lei, LE Jia-ling, ZHANG Ruo-ling, et al. Heat Transfer of Hydrocarbon Fuel in Turbulent Flow Region under Supercritical Pressure[J]. Journal of Propulsion Technology, 2013, 34(2): 225-229.)(编辑:史亚红)　　　　　　　　　　　　　*　收稿日期:2013-10-22；修订日期:2013-12-13。作者简介:赵国柱(1982—),男,博士生,研究领域为超燃冲压发动机热防护。E-mail:dfer-long@163.com