Experimental Study on the Flame Radiation Fraction of Hydrogen and Propane Gas Mixture

Abstract

Hydrogen added to hydrocarbon fuels can improve combustion efficiency. However, there are some safety problems with the storage and transportation of the hydrogen and hydrocarbon fuel gas mixture. In order to investigate the combustion characteristics of gas mixture, the propane and hydrogen are used as the fuel gas in this study. A series of experiments have been carried out to investigate the radiation fraction of the turbulent diffusion jet flame under ambient conditions (300K, 1bar). The experimental results showed that the flame radiation fraction changes slightly with the increase of hydrogen volume fraction under the same volume flow rate of propane at first, and then decreases sharply with its further increase. For propane, the dilution of hydrogen is limited. Based on the theoretical analysis of laminar combustion velocity, activation energy, and the soot generation theory, a dimensionless model has been developed to describe the evolution of the radiation fraction.

Keywords: Flame radiation fraction, Laminar combustion velocity, Activation energy, Diffusion Flame, hydrogen