Experimental study on the flame radiation fraction of hydrogen and propane gas mixture. (1st December 2022)

• Record Type: Journal Article
• Authors: Gao, Yuke; Lu, Zhengkang; Hua, Yang; Liu, Yongqiang; Tao, Changfa; Gao, Wei
• Is Part Of: Fuel. Volume 329(2022)
• Publication Date: 2022-12-01
• Subjects: Flame radiation fraction -- Laminar combustion velocity -- Activation energy -- Diffusion flame -- Hydrogen; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.125443
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: The flame radiation of C3 H8 -H2 jet flame has been investigated. Flame radiation fraction decreases sharply when f v, H 2 is larger than 0.6. The activation energy influences the laminar combustion velocity and flame radiation. A new correlation of radiation fraction for the C3 H8 -H2 jet flame has been developed. Abstract: Hydrogen added to hydrocarbon fuels can improve the combustion efficiency and reduce soot emissions. 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 (300 K, 1 bar). The experimental results showed that the dilution effect of hydrogen is limited for propane when the hydrogen flow rate is small. The radiation fraction changes slightly with the increase in the flow rate of hydrogen under the same heat release rate of propane. And then, it decreases sharply when the ratio of hydrogen volume flow rate to total flow rate is larger than 0.6. 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 radiation fraction.