Laminar burning velocities of C2H4/N2O flames: Experimental study and its chemical kinetics mechanism
作者： Weilong Wang , Huiqiang Zhang
DOI: 10.1016/J.COMBUSTFLAME.2019.01.011
关键词:
摘要: Abstract Nitrous oxide fuel blend propellants have great potential to be used in rocket engine, and investigations on the fundamental combustion characteristics of such are therefore necessary control flashback develop their chemical kinetics mechanism. Laminar burning velocities (LBVs) C2H4/N2O flames measured by using spherical expansion this paper at 0.5–2.0 atm 280 K. The present method for upper lower limits effective flame radius is reasonable experimental stretched speeds can fitted very well with stretch rates. LBVs smaller than those C2H4/N2/O2 (same N/O ratio as N2O) conditions near stoichiometric ratio, while they larger other especially fuel-rich side. not sensitive pressure range. Two kinds sub-mechanisms applied detailed mechanisms reactions, which USC Mech II-2 hydrocarbon reactions GRI 3.0 mechanism San Diego nitrogen respectively. Eight key elementary chosen based sensitivity analysis, effects available rate constants from literatures tested. Modified proposed replacing these predicts hydrocarbon/N2O flames. Sensitivity analyses performed different equivalence ratios, it found that N2O decomposition a dominant reaction codominant nondominant fuel-lean Furthermore, pathways oxidizers consumption analyzed, observations two experiment explained through relative changes under fuel-lean, conditions.
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