The charge density in a flame contains important information about the combustion processes that is difficult to obtain due fast, complex, and highly exothermic reactions. This paper presents study of using electrostatic probes measure methane fired diffusion premixed flames. sensing principle, practical design, performance assessment probe are presented. Comparative experimental studies with r...

The infrared emission spectra of a hydrogen flame and' of a natural gas flame have been compared in the region from 1. 7p. to 24p.. Emission bands have been observed at 1.87p., 2.78p. , 4.37p., 6.20p., and 15p. that a re produced by molecules of H 20 and CO2• Another band at 3.316p. is attributed to methane. From 3.0p. to 3.8p. there are a number of rotational lines, some of which may be produc...

A Large Eddy Simulation of a bluff body flame has been carried out using an unstructured grid. The flame, burning a methane-hydrogen fuel with detailed combustion chemistry (based on a mechanism of 18 species) is simulated using STAR-CD. The mixture fraction is used as a conserved scalar, and a subsequently temperature, density and species mass fraction are calculated using a probability densit...

Cavity ringdown spectroscopy (CRDS) of the hydroxyl radical (OH) has been explored in a laminar methane-air flame at atmospheric pressure over a range of equivalence ratio. Laser induced fluorescence of OH calibrated by CRDS in a lean flame compares well to PREMIX calculations using GRI-Mech 3.0. CRDS is a highly sensitive path-integrated diagnostic technique that can yield absolute absorber nu...

Based on the self-built experimental setup, propagation law of explosion flame hydrogen/methane premixed gas with different hydrogen volume fractions in equivalent ratios was investigated under action a corrugated fire-retardant core. The study shows that isolation and suppression effect core at equivalence is either promoted or suppressed, quenched without mixing when ?=0.8and1.0, also ?=1.2in...

Recently, the combustion chemistry of tetrahydrofurfuryl alcohol (THFA), a potential biofuel, was investigated in stoichiometric 20 mol % THFA/methane co-fueled premixed flame at 5.3 kPa by our group (Tran, L.-S.; Carstensen, H.-H.; Foo, K. K.; Lamoureux, N.; Gosselin, S.; Gasnot, L.; El-Bakali, A.; Desgroux, P. Experimental and modeling study high-temperature alcohol. Proc. Combust. Inst. 2021...