Shock-tube spectroscopic CO and H2O measurements during 2-methyl-1-butene combustion and chemical kinetics modeling

Laminar Flame Speed, Ignition Delay Time, and CO Laser Absorption Measurements of a Gasoline-like Blend of Pentene Isomers

“…Figure aims at assessing the current state of the art with regards to pentene isomers’ laminar flame speed measurements. The Cheng et al along with Zhong and Peng results at 350 K ± 3 K, 1 atm for 1-C 5 H 10 are compared in Figure a and match almost perfectly, while the Grégoire et al model reproduces the experimental measurements with great accuracy. A second example in Figure b shows that, at the same initial temperature (350 K ± 3 K) and at three different pressures (2, 3, and 4 atm, respectively), the flame speeds present a consistent increase as the pressure decreases when carried out in two separate experimental facilities.…”

“…A blend of pentene isomers found in a real gasoline was extensively studied experimentally, combining laminar flame speed, ignition delay time, and CO laser absorption measurements. The detailed chemical kinetics mechanism from Greǵoire et al 24 provided accurate predictions for all these new results. Two additional unbalanced mixtures removing either 2M2B (Mix B) or 2-C 5 H 10 (Mix C), to avoid the cancellation of kinetically opposite behaviors, were then carried out in the AST shock tube to obtain additional induction-time CO profiles.…”

“…Finally, to obtain the unstretched and unburned flame speed S L 0 , continuity is applied S normalL 0 = σ S normalb 0 where σ is the ratio of the densities of the burned and unburned gases ρ b /ρ u . The mixture densities were calculated using the Grégoire et al model and the equilibrium chemistry routine in Chemkin-Pro. More detail on this analysis process is given by Sikes et al…”

“…where σ is the ratio of the densities of the burned and unburned gases ρ b /ρ u . The mixture densities were calculated using the Greǵoire et al 24 model and the equilibrium chemistry routine in Chemkin-Pro. More detail on this analysis process is given by Sikes et al 34 Shock-Tube Facilities.…”

“…Finally, a good range of pressures and temperatures can be found for speciation studies, and timehistory profiles for both CO and H 2 O were recorded for all five pentene isomers at the exact same initial condition for the first time in a series of pentene isomers articles by the present authors. 19,24,26,27 Greǵoire et al developed a validated chemical kinetics mechanism encompassing all pentene isomers: some reactions have been previously modified, in particular the branched allylic C 5 H 9 species with OH and HO 2 among others, following ab initio theoretical analysis by Goldsmith et al 28 to determine the reaction rates on the reaction of C 3 H 5 with HO 2 .…”