Experimental study of the heat recovery rate in a porous medium combustor under different hydrogen combustion modes

摘要: Abstract This study investigated the heat recovery rates of hydrogen flame modes in porous medium combustion. The was oxide-bonded silicon carbide (OB-SiC), aluminum oxide (Al 2 O 3 ) or zirconia (ZrO with 60 30 PPI. results indicated that reaction temperature a mode controlled by equivalence ratio (flame velocity), thermal load and solid properties ( k C P ). operation region dimensionless velocity V ∗ Under ultra-lean conditions Φ  = 0.2–0.25), blown out when above 4.5 for OB-SiC Al settings. In contrast no blow occurred ZrO setting under high  > 0.4), conical unity. mechanism surface interior combustion based on conduction radiation medium. θ is defined as over adiabatic temperature. When unity, approached combustion, maximum 0.994  = 0.3) setting. Furthermore, 0.942 0.969 at  = 0.3. rate thus higher than mode.