What is it about?
Highly-resolved numerical simulations have been performed to study the interactions of premixed hyrogen/air flames with forced unsteady flows. The results reveal different flame stabilization behaviors at varied flow unsteadiness conditions, which lead to a strong correlation of the overall burning rate of hydrogen with the unsteady flow conditions.
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Why is it important?
Hyrogen will play a major role in the worldwide energy transition, as it can be produced directly from renewable energy sources via power-to-gas process or electrolysis, respectively. However, the combustion of hyrogen to reproduce power or heat represents a difficult task, as hyrogen burns much faster in air compared with other common hyrocarbon fuels, and therefore, it cannot be applied to available combustors.
Perspectives
This work reveals the combustion dynamics of premixed hygrogen/air flames as well as their interactions with unsteady flows, which provide mechanism-based knowedge considering flame stabilization, which is of essential importance for designing future hyrogen-powered energy conversion system.
Feichi Zhang
Karlsruhe Institute of Technology
Read the Original
This page is a summary of: Dynamics of premixed hydrogen/air flames in unsteady flow, Physics of Fluids, August 2022, American Institute of Physics,
DOI: 10.1063/5.0098883.
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