Effect of Hydrogen Mixing on Combustion and Emission Performance of Natural Gas Combustion Chamber
The combustion of natural gas mixed with hydrogen can effectively reduce the emission of carbon.However,the fuel properties will be changed by mixing hydrogen,which will affect the combustion process,so it is necessary to conduct in-depth research on hydrogen-mixing combustion.The combustion characteristics and emission characteristics of gas turbines fueled by mixed hydrogen natural gas were mainly studied.The numerical simulation was adopted to study the effects of different hydrogen-mixed ratios(6 working conditions of volume content for 0～100％H2)on the combustion process of GE-10 experimental gas turbine combustion chamber.The results show that with the increase of the hydrogen mixing ratio,the flame temperature is raised and the combustion reaction zone is moved forward.At a low mixing ratio,the temperature distribution at the outlet of the flame cylinder tends to be uniform with the increase in the hydrogen mixing ratio.When the hydrogen blending ratio exceeds 0.6,the uniformity of temperature distribution at the outlet is greatly decreased.Moreover,increasing hydrogen in the mixed fuel will result in local heat release increases and leads to NOx emission increases.When the hydrogen blending ratio exceeds 0.8,the increased range of NOx emission becomes larger.At the same time,with the increase in the hydrogen mixing ratio,the emission of CO and CO2 decreases significantly,and the production of H2O increases significantly.This research will provide theoretical guidance for the subsequent application of hydrogen-mixed combustion technology in industrial gas turbines.
natural gas mixed with hydrogengas turbinecombustion performanceemission performance
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