New optical method for heat flux measurements in stagnation point laminar methane-air flames and hydrogen-methane-air lames using thermographic phosphors [Elektronische Ressource] / von Mohamed Salem Elmnefi

Ingwi & Thermodznamik

Description

New Optical Method for Heat Flux Measurements in Stagnation Point Laminar Methane/Air Flames and Hydrogen/Methane/Air Flames using Thermographic Phosphors Von der Fakultät für Ingenieurwissenschaften, Abteilung Maschinenbau der Universität Duisburg-Essen zur Erlangung des akademischen Grades DOKTOR-INGENIEUR genehmigte Dissertation von Mohamed Salem Elmnefi aus Benghazi / Libyen Referent: Univ.-Prof. Dr. rer. nat. Burak Atakan Korreferent: Univ.-Prof. Dr. rer. nat. Volker Buck Tag der mündlichen Prüfung: 24.11.2010 Abstract Abstract In the present study, a new optical method was implemented to study the heat transfer from flat stagnation point flames which can be regarded as one-dimensional in the central part. Premixed methane-air flames and hydrogen-methane-air flames were investigated. The effects of burner-to-plate distance and the fresh gas mixture velocity on heat transfer were examined. Experiments were performed using light induced phosphorescence from thermographic phosphors to study the wall temperatures and heat fluxes of nearly one-dimensional flat premixed flames impinging upward normally on a horizontal water cooled circular flat plate. The investigated flames were stoichiometric, lean and rich laminar methane/air flames with different equivalence ratios of φ =1, φ = 0.75 and φ = 1.25 and stoichiometric laminar hydrogen/methane/air flames.

Informations

• Publié par: universitat_duisburg-essen
• Publié le: 01 janvier 2010
• Nombre de lectures: 41
• Langue: English
• Poids de l'ouvrage: 3 Mo

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