PremixedFlamesIILect17ME525SP2011

PremixedFlamesIILect17ME525SP2011 - ME 525: Combustion...

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ME 525: Combustion Lecture 17: Numerical Analysis of Premixed Flames rof Robert P Lucht Prof. Robert P. Lucht Room 87, Mechanical Engineering Building chool of Mechanical Engineering School of Mechanical Engineering Purdue University West Lafayette, Indiana Email: [email protected] Phone: 765-494-5623 arch 8 2011 School of Mechanical Engineering, Purdue University March 8, 2011 1/26
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Lecture Topics • PREMIX: A Fortran Program for Modeling Steady Laminar One-dimensional Premixed Flames • Description of code structure • Discussion of the results of a premixed flame calculation School of Mechanical Engineering, Purdue University 2/26
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PREMIX A FORTRAN Code capable of calculating temperature and species profiles for two different laminar premixed flame configurations: (a) Burner-Stabilized Flame (Heat losses; thus, mperature profile either known from measured data temperature profile either known from measured data or obtained from solving energy equation) (b) Freely-Propagating Adiabatic Flame (No heat losses; thus, temperature profile obtained from olving energy equation) solving energy equation) School of Mechanical Engineering, Purdue University 3/26
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PREMIX School of Mechanical Engineering, Purdue University 4/26
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Conservation Equations Steady, constant pressure, quasi-one-dimensional flame 1 nergy : dT d dT k A  propagation governed by the following eqns.: energy : P KK mk dx c dx dx A dT A   ,, 11 v 0 kk d i f fp k k k k pp Y c hMW cd x c Y      , v0 species: ass: k d i f f k k dY d mA Y A M W dx dx A   v mass: ideal gas EOS: mix m PMW School of Mechanical Engineering, Purdue University g u RT 5/26
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Problem Formulation he net chemical production rate for each species within the The net chemical production rate for each species within the chemical mechanism results from balance among all reactions involving the particular species. Law of mass action is assumed and the forward reaction rate coefficients are specified within the reaction mechanism in the modified rrheni s form as Arrhenius form as: E  exp b a f u kA T RT   Reverse reaction coefficients are calculated using the equilibrium School of Mechanical Engineering, Purdue University constant for the reaction.
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This note was uploaded on 12/27/2011 for the course ME 525 taught by Professor Lucth during the Fall '11 term at Purdue.

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PremixedFlamesIILect17ME525SP2011 - ME 525: Combustion...

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