The low-temperature HyChem-II: Application to real fuels
- We present the application of the extended HyChem modeling approach to low-temperature (LT) oxidation of three real fuels. A conventional jet fuel (Jet-A), and two gasoline fuels (Shell-R, and Shell-N) were chosen as the target fuels. Time histories of CO and CH2O measured during the LT (700-880 K) oxidation of fuel/oxygen mixtures in shock tubes were used to constrain the model parameters. The reaction models were tested against ignition delay time (IDT) measurements conducted with fuel/air mixtures under a range of pressure and, temperature conditions. The LT-HyChem models show excellent agreement with the measurements for all fuels. A detailed uncertainty analysis was conducted to assess the impact of measured species time histories in reducing the uncertainty associated with model predictions. Impact of uncertainty in the rate constants of reactions encompassing the foundational fuel kinetic model on the overall model predictions was also considered. Finally, a brute force sensitivity analysis is presented to identify the most important model parameters controlling the oxidation of these fuels in the low-temperature combustion and the negative temperature coefficient regimes.
|Type of resource
|March 24, 2023
|March 24, 2023; March 24, 2023
|Davidson, David F.
|Hanson, Ronald K.
|Chemical Kinetics; Low-temperature oxidation; NTC; HyChem; Shock Tubes
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