The ignition delay of n-decane and oxygen diluted in argon was investigated for a series of mixtures ranging from 0.49 to 1.5% decane and 4.16 to 23.25% O 2 diluted in argon. The temperature range was 1239-1616 K and the pressure range was 1.82-10.0 atm. All experiments were performed in a heated shock-tube. An overall ignition delay equation was deduced for 144 experiments: τ = 10 −12 exp(+34240/RT ) [

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Mixtures of cyclopentadiene and oxygen diluted in argon were used to obtain ignition delay data in a single pulse shock-tube. The temperatures ranged from 1278-2110 K and the experimental pressures were between 2.43 and 12.45 atm. The fuel concentrations ranged from 0.5 to 2.5% and the oxygen concentrations were between 3.3 and 16.6%. A Semenov ignition delay expression was determined: The concentrations are in mol/cc and the activation energy is in cal/mol. Gas-chromatographic analyses were run on samples quenched before the ignition. The kinetics of combustion of cyclopentadiene was modeled with a full scheme containing 439 elementary reactions and a reduced scheme containing 125 reactions. Both ignition delay times and product distribution served as modeling targets. The mechanism of combustion of cyclopentadiene is discussed in connection to the combustion of aromatic fuels.

A detailed shock tube investigation on the ignition delay times in mixtures containing n-hexane and oxygen diluted in argon is reported. The product distribution ofthe pre-ignited mixtures was also investigated and a computer modeling of the combustion kinetics was performed. The experiments covered the temperature range 1020-1725 K at pressures of 1-7 atm. A computer simulation was performed with a large number of elementary reactions (386), which was then reduced to a scheme containing only 76 reactions.

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