TY - GEN
T1 - Effect of prompt dissociation of formyl radicals on 1,3,5-trioxane laminar flame speeds at high pressure
AU - Zhao, Hao
AU - Fu, Jiapeng
AU - Ju, Yiguang
N1 - Funding Information:
This work was supported by DOE NETL research grant and the Princeton Environmental Institute (PEI)-Andlinger Center for Innovative Research Awards in Energy and the Environment.
Publisher Copyright:
© 2017 by Hao Zhao, Jiapeng Fu, and Yiguang Ju.
PY - 2017
Y1 - 2017
N2 - Flame speeds of all hydrocarbon fuels are very sensitive to the reactions of formaldehyde (CH2O) and formyl radical (HCO). In this paper, we studied the prompt dissociation effect of HCO on the flame speeds of trioxane and formaldehyde up to 9 atm. The effects of prompt HCO dissociation were examined at high pressure. Different kinetic models were compared against the experimental results. The results showed there was a significant effect of the HCO prompt reaction on the flame speed in a broad range of pressure and equivalence ratio. At higher pressure, it was observed that the prompt effect was reduced due to the third-body collision effect. However, with the increase of O2 mole fraction, the prompt effect was enhanced. Comparison showed that HP Mech with the inclusion of the prompt reactions had a better prediction at lean and ultra-lean conditions than other mechanisms. The improved prediction of the flame speed indicated that the prompt effect needed to be considered in the model development of hydrocarbon and oxygenated fuel combustion.
AB - Flame speeds of all hydrocarbon fuels are very sensitive to the reactions of formaldehyde (CH2O) and formyl radical (HCO). In this paper, we studied the prompt dissociation effect of HCO on the flame speeds of trioxane and formaldehyde up to 9 atm. The effects of prompt HCO dissociation were examined at high pressure. Different kinetic models were compared against the experimental results. The results showed there was a significant effect of the HCO prompt reaction on the flame speed in a broad range of pressure and equivalence ratio. At higher pressure, it was observed that the prompt effect was reduced due to the third-body collision effect. However, with the increase of O2 mole fraction, the prompt effect was enhanced. Comparison showed that HP Mech with the inclusion of the prompt reactions had a better prediction at lean and ultra-lean conditions than other mechanisms. The improved prediction of the flame speed indicated that the prompt effect needed to be considered in the model development of hydrocarbon and oxygenated fuel combustion.
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U2 - 10.2514/6.2017-1964
DO - 10.2514/6.2017-1964
M3 - Conference contribution
AN - SCOPUS:85017214864
T3 - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
BT - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 55th AIAA Aerospace Sciences Meeting
Y2 - 9 January 2017 through 13 January 2017
ER -