IntroChemKineticsLect3ME525SP2011

IntroChemKineticsLect3ME525SP2011 - ME 525: Combustion...

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ME 525: Combustion Lecture 3: Basic Chemical Kinetics, he Arrhenius Rate Law The Arrhenius Rate Law rof. Robert P. Lucht Prof. Robert P. Lucht Room 87, Mechanical Engineering Building School of Mechanical Engineering gg Purdue University West Lafayette, Indiana Email: Lucht@purdue.edu hone: 765 94 623 Phone: 765-494-5623 January 18, 2011 School of Mechanical Engineering, Purdue University
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Lecture Topics remixed versus nonpremixed flames Premixed versus nonpremixed flames. Global and elementary chemical reactions. Bimolecular reactions – the Arrhenius rate xpression expression. Termolecular reactions. Forward and reverse reactions and e equilibrium constant the equilibrium constant School of Mechanical Engineering, Purdue University
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Premixed Flames Uniform flow T Ox x Sintered metal disk P F R Flow straightening beads x F School of Mechanical Engineering, Purdue University Ox
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Nonpremixed Flames – Jet Diffusion Flame toichiometric C T P Stoichiometric Contour SC x Ox F R r Ox Jet Flow Apparatus r F School of Mechanical Engineering, Purdue University
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Nonpremixed Flames: The et Diffusion Flame Jet Diffusion Flame School of Mechanical Engineering, Purdue University
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Global Reactions Global reaction expression for combustion of fuel and oxidizer frequently (must be) used in turbulent combustion modeling: Pr F aOx b   nm dF T PF O         , ,, G kT x dt mn f TP a l so  Global reaction expressions for H /O , C H /O combustion: 22 2 H O H O  2 2 3 8 2 School of Mechanical Engineering, Purdue University 38 2 2 2 53 4 CH O CO HO
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Bimolecular Elementary Reactions These reactions obviously cannot proceed in a single collision. Oxidation of the fuel to final products occurs through an intricate series of elementary (single- ollision) reactions onsider first the imolecular AB CD
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IntroChemKineticsLect3ME525SP2011 - ME 525: Combustion...

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