Accepted manuscript
A physics-based approach to modeling real-fuel combustion chemistry - I. Evidence from experiments, and thermodynamic, chemical kinetic and statistical considerations
Combustion and flame, Vol.193, pp.502-519
07/2018
Handle:
https://hdl.handle.net/2376/119914
Appears in Aviation Sustainability Center (ASCENT)
Abstract
Real distillate fuels usually contain thousands of hydrocarbon components. Over a wide range of combustion conditions, large hydrocarbon molecules undergo thermal decomposition to form a small set of low molecular weight fragments. In the case of conventional petroleum-derived fuels, the composition variation of the decomposition products is washed out due to the principle of large component number in real, multicomponent fuels. From a joint consideration of elemental conservation, thermodynamics and chemical kinetics, it is shown that the composition of the thermal decomposition products is a weak function of the thermodynamic condition, the fuel-oxidizer ratio and the fuel composition within the range of temperatures of relevance to flames and high temperature ignition. Based on these findings, we explore a hybrid chemistry (HyChem) approach to modeling the high-temperature oxidation of real, distillate fuels. In this approach, the kinetics of thermal and oxidative pyrolysis of the fuel is modeled using lumped kinetic parameters derived from experiments, while the oxidation of the pyrolysis fragments is described by a detailed reaction model. Sample model results are provided to support the HyChem approach.
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Details
- Title
- A physics-based approach to modeling real-fuel combustion chemistry - I. Evidence from experiments, and thermodynamic, chemical kinetic and statistical considerations
- Creators
- Hai Wang - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USARui Xu - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USAKun Wang - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USACraig T Bowman - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USARonald K Hanson - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USADavid F Davidson - Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-3032, USAKenneth Brezinsky - University of Illinois ChicagoFokion N Egolfopoulos - University of Southern California
- Publication Details
- Combustion and flame, Vol.193, pp.502-519
- Academic Unit
- Aviation Sustainability Center (ASCENT); Alternative Jet Fuel
- Publisher
- Elsevier Inc
- Grants
- 13-CAJFE-SU-006, Federal Aviation Administration (United States, Washington) - FAA13-C-AJFE- SU-015, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99900620471101842
- Language
- English
- Resource Type
- Accepted manuscript