Combustion - 國立中央大學機械工程學系

Chapter 1 Introduction to CombustionSection 3Scientific Disciplines of CombustionME776Combustion ⎯ Chemically-reacting flows w/ rapid, highly-exothermic reactionsChemically Reacting FlowsThermodynamics Fluid MechanicsChemical KineticsHeat and Mass TransferMaterial Structure andBehaviourTurbulence1.3.1 ThermodynamicsInitial states Final statesReactants Products (Equilibrium)Heat for utilizationAllows us to do the bookkeeping on how much chemicalenergy can be converted to thermal energy in a combustionprocess.Determines the properties of the products ( T ; composition )when equilibrium is reached.• Mature science & its laws have been firmly established.1.3.2 Chemical Kinetics• What path and how long of such a process.• Conclusions based on equilibrium calculations could be quite erroneous.e.g. A particular reaction needs 10 6 years for completion 當 分 析 cycleperformance of an auto engine.e.g. Calculation amount of NO x11