Simplification of pyrolytic reaction mechanism and turbulent heat transfer of n-decane at supercritical pressures

Bo Ruan, Hua Meng, Vigor Yang

研究成果: Article同行評審

53 引文 斯高帕斯(Scopus)

摘要

Fluid flows and heat transfer of hydrocarbon fuels with endothermic pyrolysis play an important role in regenerative cooling of many flight vehicles and energy-conversion devices. In this paper, an approach to simplifying the global pyrolytic reaction mechanism of n-decane is proposed for problems with mild endothermic pyrolysis at supercritical pressures. The basic idea lies in the fact that the high-molecular-weight alkane or alkene components in a thermally decomposed n-decane mixture possess similar thermophysical properties and make only minor contributions to heat absorption; they can thus be grouped together and represented by a single light species. Numerical tests indicate that a reduced 12-species reaction mechanism for mild cracking of n-decane represents a reasonable choice in terms of model accuracy and efficiency. The reduced pyrolytic reaction mechanism is employed to study the effect of mild thermal decomposition of n-decane on turbulent convective heat transfer at supercritical pressures. The wall heat flux can be increased significantly at high fluid temperatures, due mainly to heat absorption resulting from endothermic pyrolytic reactions.

原文English
頁(從 - 到)455-463
頁數9
期刊International Journal of Heat and Mass Transfer
69
DOIs
出版狀態Published - 2014

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 機械工業
  • 流體流動和轉移過程

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