A survey of recent studies on flame extinction |
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| Affiliation: | 1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, PR China;2. Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;3. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an 710049, PR China;1. Institute of Reactive Flows and Diagnostics (RSM), Technische Universität Darmstadt, Jovanka-Bontschits-Straße 2, 64289 Darmstadt, Germany;2. Institute of Energy and Power Plant Technology (EKT), Technische Universität Darmstadt, Jovanka-Bontschits-Straße 2, 64289 Darmstadt, Germany;1. SKLTCS, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China;2. School of Power Engineering, Chongqing University, Chongqing 400044, China;1. Department of Mechanical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia;2. CERFACS, 42 Avenue Gaspard Coriolis, Toulouse cedex 1, 31057, France |
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| Abstract: | A survey of the existing achievements in the domain of problems of extinction and flammability limits is presented. It is shown that the fundamental geometrical proportions between flame thickness and preheat zone for any flame, limit flames being included, are constant and independent of the mixture composition. The behaviour of limit flames under various severe physical conditions of the experiment is described and the influence of various factors on the extinction process is discussed. The conditions of flame quenching by the wall are analysed. Two particular mechanisms of flame extinction are discussed: for a flame moving in a tube in the direction of acceleration and in the opposite direction. The principal aim of the present paper was to describe the physical mechanisms of flame extinction under various initial and boundary conditions. |
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