Topic 1 Cool flames Problems:

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Presentation transcript:

Topic 1 Cool flames Problems: Failure of cool flame mechanism (full strength mixtures) Cool flame chemistry coupling with pyrolysis chemistry, rate constants uncertainty? Cool flame extinction/speed (turbulent, high pressure) Low temperature ignition assisted flame propagation (high T/P) Fuel properties, blended fuel effects/stratification/scalar dissipation rate Blue flame/mild flame? What fuels? Propane? DME, Pentane, butanol?

Collaboration Team: Cool flame mechanism (full strength mixtures) YJ (flames), NC (Shock tube), KM, MK, JB at Aachen… Pentane, heptane, n-dodecane, butanol

What I summarized fro; the different talks, probably incomplete From the talks, different issues ffor cool flames: Chemistry: how detailed does it need to be? Which species would be the best marker in order to have a better view of (i) the occurrence, (ii) the speed at which it propagates Cool flame dynamics What is the speed of such a wave? What would be the % of the total heat release? What is the effect of the pressure? Fuel reformulation / Surrogate / Real fuels Prediction of cool flames based on the composition and engine conditions Effect of stratification / Dilution on the cool flame “dynamics”