Abstract
Porous media burners (PMBs) enable enhanced combustion performance by internally recirculating heat released from the combustion products upstream to the reactants via an inert solid matrix. Compared to conventional free-flame systems, PMBs are characterized by higher burning velocities, extended flammability, and lower emissions of NOx. Current PMB implementations utilize a two-zone concept in which the flame stabilizes at the interface between two porous matrices of different topologies. In this work, a PMB design having a spatially graded porous matrix is proposed, supported by theoretical analysis of the governing equations and constitutive relations. Through computations and experiments, it is shown that the proposed physical design of the porous matrix results in a significant enhancement of the power-dynamic range and in excess of 50% higher blow-off limits compared to current designs. This is achieved through gradation in topology (i.e. porosity, pore diameter, cell diameter, etc.), which enables a continuous variation of radiative extinction properties as well as interphase heat exchange, allowing the flame to stabilize dynamically within the porous matrix and for a wider range of operating conditions.
Sign-in/Register to access full text options 
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.
