航空学报 > 2011, Vol. 32 Issue (12): 2220-2226   doi: CNKI:11-1929/V.20110627.1733.003

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

阮波, 孟华   

  1. 浙江大学 航空航天学院, 浙江 杭州 310027
  • 收稿日期:2011-03-31 修回日期:2011-04-27 出版日期:2011-12-25 发布日期:2011-12-08
  • 通讯作者: 孟华 E-mail:menghua@zju.edu.cn
  • 作者简介:阮波(1983-) 男,博士研究生。主要研究方向:超临界传热。 E-mail: ruanbo@zju.edu.cn
    孟华(1968-) 男,博士,教授,博士生导师。主要研究方向:推进与动力技术。 Tel: 0571-87952990 E-mail:menghua@zju.edu.cn
  • 基金资助:

    浙江省自然科学基金 (R1100300)

Numerical Model Development and Validation for Hydrocarbon Fuel Supercritical Heat Transfer with Endothermic Pyrolysis

RUAN Bo, MENG Hua   

  1. School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
  • Received:2011-03-31 Revised:2011-04-27 Online:2011-12-25 Published:2011-12-08

摘要: 基于正癸烷在超临界压力下的热裂解反应机理,建立了考虑正癸烷裂解吸热反应及超临界传热现象的数值计算模型。采用该模型对正癸烷在3.45~11.38 MPa压力条件下的湍流传热过程进行了数值模拟计算研究,得到了详细的温度、速度、裂解转化率、物性及壁面热流密度的变化和分布情况。通过与已有的实验和数值计算结果的对比,对数值模型和计算软件进行了充分的验证。结果表明,本文的数值模型是准确、可靠的。这就为研究碳氢燃料的裂解吸热反应及超临界传热现象提供了一个有效的模拟计算工具。

关键词: 超临界传热, 数值模拟, 碳氢燃料, 正癸烷, 热裂解, 主动再生冷却

Abstract: A numerical model incorporating an n-decane thermal cracking mechanism at supercritical pressures is developed for studying n-decane supercritical heat transfer with endothermic pyrolysis. The model is employed for numerical investigations of the turbulent convective heat transfer of n-decane at supercritical pressures ranging from 3.45 MPa to 11.38 MPa. Detailed variations are obtained of the fluid temperature, velocity, pyrolytic conversion rate, thermophysical properties, and wall heat flux. The calculated results are compared and validated against the available experimental and computational data, showing excellent agreement. A computational tool is thus established for studying the supercritical heat transfer of hydrocarbon fuels with consideration of endothermic pyrolytic reactions.

Key words: supercritical heat transfer, numerical simulation, hydrocarbon fuel, n-decane, pyrolysis, active regenerative cooling

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