Flame quenching by the wall-fundamental characteristics

• Autorzy: Gutkowski A. , Tecce L. , Jarosiński J.
• Języki publikacji: EN

Abstrakty

EN

Knowledge of flame-wall interaction allowed us to understand the phenomena of near wall combustion and flame extinction. The study of near wall flame propagation is important because it is related to engineering applications, such as possible misfiring in internal combustion engines, optimization of combustion, and reduction of unburned hydrocarbons in the combustion products. In the present work different characteristics of the quenching distance were measured in square narrow quenching channels. The channel widths were changed from 2.5mm to 15mm, their length being 30cm. Propane/air mixture was employed in experiments. Direct visualization has been used to observe flame behaviour under quenching conditions. Numerical simulation revealed structure of limit flames during their propagation in quenching channels. It was found satisfactory agreement between numerical calculations and experiments. In conclusions it was confirmed that flame quenching depends on the relation between heat release rate to heat loss rate. Dead space appeared to be larger for rich mixtures in comparison with the lean ones. Flame curvature reached maximum value for stoichiometry and decreased for leaner or richer mixtures.

Słowa kluczowe

EN

flame-wall interaction; quenching distance; flame parameters; flame speed; numerical simulation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 3
• Strony: 203--210
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Gutkowski A.

autor

Tecce L.

autor

Jarosiński J.

• Technical University of Lodz Stefanowskiego 1/15, 90-924 Lodz, Poland tel.: [phone], fax: [phone],

Bibliografia

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