Flame radiation and linear heat transfer in a tubular can combustor

Total and spectral flame radiation measurements were made in a tubular-can combustor at a series of parametric operating conditions to examine the heat transfer within the combustor. Radiation measurements were taken for a range of inlet air pressures of 0.34-2.0 MPa, inlet air temperatures of 533-700 K, with two different fuels, Jet A (13.9% hydrogen) and ERBS (12.9% hydrogen). Measurements of liner temperatures combined with the parametric radiation results allowed a calculation of the combustor liner heat loads. Flame emissivity was determined from the spectral measurements and compared against an empirical correlation.