Modeling Study of the Possibility of HCCI Combustion Improvement via Photochemical Activation of Oxygen Molecules

Analysis of kinetic mechanisms responsible for the combustion enhancement in HCCI engine using the natural gas as a fuel through the addition of small amounts of chemically active species such as atomic oxygen and singlet delta oxygen that can be produced due to photodissociation or laser-induced ex...

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Bibliographic Details
Published in:Energy & fuels 2014-03, Vol.28 (3), p.2170-2178
Main Authors: Starik, A. M, Kozlov, V. E, Titova, N. S
Format: Article
Language:English
Subjects:
Atomic oxygen
Combustion
Cylinders
Deltas
Excitation
Natural gas
Photochemical
Photodissociation
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Summary:Analysis of kinetic mechanisms responsible for the combustion enhancement in HCCI engine using the natural gas as a fuel through the addition of small amounts of chemically active species such as atomic oxygen and singlet delta oxygen that can be produced due to photodissociation or laser-induced excitation of O2 molecules is conducted. The simulation, based on zero-dimensional single-zone thermochemical model, shows that the excitation of O2 molecules to the a 1Δg state is more effective in the advance of ignition timing and combustion performance than the production of atomic oxygen. However, in order to obtain an advance in HCCI combustion via photodissociation or laser-induced excitation of O2 molecules, one needs to diminish the initial temperature of the mixture in the cylinder or to decrease the compression ratio.
ISSN:0887-0624
1520-5029
DOI:10.1021/ef402116g