5310 Combustion Introduction Lecture 4

5310 Combustion Introduction Lecture 4 - MAE 5310...

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MAE 5310: COMBUSTION FUNDAMENTALS Lecture 4: Introduction to Chemical Equilibrium September 1, 2011 Mechanical and Aerospace Engineering Department Florida Institute of Technology D. R. Kirk
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CHEMICAL EQUILIBRIUM So far we have calculated adiabatic flame temperature assuming complete combustion All fuel is completely oxidized to form CO 2 , H 2 O and excess O 2 and N 2 are carried through unaffected Assumption reasonable for T < 1250 K, but most combustion systems operate at higher T Species that are normally stable at ambient conditions dissociate Concentration is determined by a balance between oxidation and formation Balance is a function of T, P and concentration Note: The chemical equilibrium relations we will use still only approximate the species concentrations in a combustion process. That is, they rest on the assumption that the conditions are constant for a sufficiently long time for all the reactions to reach equilibrium 2 2 2 2 2 2 1 2 1 O H O H O CO CO + +
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This note was uploaded on 02/11/2012 for the course MAE 5310 taught by Professor Danielkirk during the Fall '09 term at FIT.

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5310 Combustion Introduction Lecture 4 - MAE 5310...

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