F141 Experimental Study on Burning Velocity Characteristics of CO_2 diluted Propane Premixed Meso-scale Spherical Laminar Flames

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  • F141 CO_2添加プロパン予混合微小層流火炎の燃焼速度特性に関する実験的研究(OS-03:革新的技術のための燃焼研究(2))

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This study is performed to examine experimentally the effects of CO_2 as one of EGR gas on the burning velocity of the propane-oxygen-dilution gas premixed meso-scale spherical laminar flames with the flame radius r_f < about 5mm. The mixtures have nearly the same laminar burning velocity (S_<L0>=25cm/s) with different equivalence ratios (φ=0.5-1.4). N_2 is also examined for comparison. The radius and the burning velocity of meso-scale flames are obtained by using sequential schlieren images recorded under appropriate ignition conditions. It was clear that the burning velocity for the mixture diluted with CO_2 at the same r_f and Karlovitz number has tendency to be larger than that with N_2, except for φ=1.4.

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