%0 Journal Article
%T Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor
%J -
%D 2019
%R https://doi.org/10.1038/s42005-019-0142-8
%X Unlike hydrocarbon fuel, hydrogen is ¡®green¡¯ and attracting more and more attentions in energy and propulsion sectors due to the zero emission of CO and CO2. By applying numerical simulations, we explore the physics of how a hydrogen-burnt flame can sustain pulsating combustion and its impact on the thermodynamic properties of a standing-wave combustor. We also explain how implementing a heat exchanger can mitigate such pulsating combustion. The dynamic interactions of the unsteady flow-flame-acoustics-heater are examined by varying the mass flow rate £¿H2 and the heating bands¡¯ surface temperature TH. The frequency and amplitude of the pulsating combustion are shown to depend strongly on £¿H2. In addition, varying TH is shown to lead to not only the molar fraction of the combustion species being changed but also the flame-sustained pulsating oscillations being mitigated somehow. Finally, nonlinearity is observed and identified in the unsteady flow velocity and the two heat sources
%U https://www.nature.com/articles/s42005-019-0142-8