Characterization of radiative heat transfer in a spark-ignition engine through high-speed experiments and simulations

Characterization of radiative heat transfer in a spark-ignition engine through high-speed experiments and simulations

A combined experimental and Large-Eddy Simulation (LES) study of molecular radiation is presented for combustion in a homogeneous pre-mixed spark-ignition engine. Molecular radiation can account for ~10% of the engine heat loss and could have a noticeable impact on the local conditions within the co...

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Bibliographic Details
Published in:Oil & gas science and technology Vol. 74; p. 61
Main Authors: Henrion, Lucca, Gross, Michael C., Fernandez, Sebastian Ferreryo, Paul, Chandan, Kazmouz, Samuel, Sick, Volker, Haworth, Daniel C.
Format: Journal Article
Language:English
Published: Paris EDP Sciences 2019
Institut Français du Pétrole (IFP)
IFPEN
Subjects:
02 PETROLEUM
03 NATURAL GAS
Analytical methods
Combustion
Combustion chambers
Cylinders
Emission analysis
Emission spectroscopy
energy & fuels
engineering
Gas mixtures
Gases
Heat loss
Heat transfer
High speed
Large eddy simulation
Molecular gases
Oceanic eddies
Physics
Post-production processing
Radiation
Radiative heat transfer
Simulation
Spark ignition
Spectrum analysis
Thermochemical properties
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Summary:A combined experimental and Large-Eddy Simulation (LES) study of molecular radiation is presented for combustion in a homogeneous pre-mixed spark-ignition engine. Molecular radiation can account for ~10% of the engine heat loss and could have a noticeable impact on the local conditions within the combustion chamber. The Transparent Combustion Chamber (TCC) engine, a single-cylinder two-valve research engine with a transparent liner and piston for optical access, was used for this study. High-speed infrared emission spectroscopy and radiative post-processing of LES calculations have been performed to gain insight into the timescales and magnitude of radiative emissions of molecular gases during the combustion process. Both the measurements and simulations show significant Cycle-to-Cycle Variations (CCV) of radiative emission. There is agreement in the instantaneous radiative spectrum of experiment and simulation, but the crank-angle development of the radiative spectrum shows disagreement. The strengths and limitations of the optical experiments and radiative simulations are seen in the results and suggest pathways for future efforts in characterizing the influence of molecular radiation. In particular, focusing on the relative changes of the spectral features will be important as they contain information about the thermochemical properties of the gas mixture.
Bibliography:USDOE Office of Energy Efficiency and Renewable Energy (EERE)
EE0007307
ISSN:1294-4475
1953-8189
2804-7699
DOI:10.2516/ogst/2019030