Volume 47

Investigation of the Combustion Characteristics of Hydrogen-blended Natural Gas Yingying Kong, Yuxing Li, Sailei Wang, Hui Han

Abstract

During the initial phases of the energy transition, blending hydrogen into operational natural gas pipelines proves to be an efficient method for hydrogen delivery. Nevertheless, the blending of hydrogen raises the reactivity of the gas and escalates the fire hazard. A jet fire occurs when a leakage and accidental ignition of a hydrogen/natural gas mixture within a pipeline. Flame length, as one of the key parameters to measure fire safety, is of great significance for evaluating the impact range of fire. A numerical model of horizontal jet fire of hydrogen-blended natural gas, including hydrogen content of 0%, 10%, 20%, 50% and 100%, is established to analyze the effect of hydrogen on flame length from the perspective of combustion intermediate. The research results may provide reference for the risk assessment of hydrogen-blended natural gas pipelines.

Keywords natural gas, hydrogen, jet fire, flame length, safety