Abstract
The hydrogen is expected to become the energy vector of the future. If for environmental protection this concept it is obvious, the data for the design of hydrogen combustion facilities are still insufficient. This paper discusses the fundamental actions related to the design of a hydrogen burner. Numerical modelling researches using the Ansys-Fluent software has shown the link between the flow velocity in combustible gas jets together with the required air and the combustion rates. Combustion models (both analytical and numerical) allowed finding the optimal ratios between the two specified velocities (combustion and flow) compared to those for methane combustion, correlated also with the classical directions and recommendations for the burner design.
Highlights
Hydrogen is a valuable solution for the future of energy but its combustion applications still need a lot of theoretical and experimental data
Considering the hypothesis that the turbulent flame represent a zone of disperse reactions, in order to apply the comparison between the flow velocity and the combustion rate, the propagation of the turbulent flame can be assimilated that of the laminar flame
It is noted that in the case of the hydrogen flame, the higher combustion rate and turbulence of the jet compared to methane led to a 10% shorter flame shorter
Summary
Hydrogen is a valuable solution for the future of energy but its combustion applications still need a lot of theoretical and experimental data. Gaseous hydrogen is characterized by low calorific value, very low density, extremely high combustion rate. These three characteristics must be incorporated in combustion technologies. Very high burning speed requires first of all a very high speed at the exit of the fuel from the burner embrasure (or its channels) in order to comply with the general stability condition: the equality between the flow velocity and the combustion rate. These characteristics make hydrogen totally different from fuels in the category of hydrocarbons. High flow rates will impose a high degree of turbulence that decisively influences the entire combustion process [1,2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
