Measurements in a gas-fired cylindrical furnace

• Published in: Combustion and flame 1983-01, Vol.51, p.249-261
• Main Authors: Hassan, M.M., Lockwood, F.C., Moneib, H.A.
• Format: Article
• Language: English
• ISSN: 0010-2180; 1556-2921
• DOI: 10.1016/0010-2180(83)90104-9

Measurements in a vertically orientated, gas-fired cylindrical furnace are reported. They are intended to assist the validation of combustor prediction methods. The furnace chamber is 0.6 m in diameter and thermal radiation effects are significant. The burner is an industrial-type double concentric device with variable swirl and a quarl. Results have been obtained for two excess air levels and for zero swirl and a swirl number 0.56. Particular care has been taken to ensure the axial symmetry of the flow. Very fine thermocouples have been deployed to map the gas temperature. For species concentration comparative measurements have been made using a quartz microprobe, a water-cooled probe, and a direct quench water probe. Incident radiation fluxes have been obtained with an ellipsoidal radiometer. Small discrepancies among the results of the three concentration probes are revealed. The quartz probe appears the most accurate, but it is unsuited to the hot near burner region. The water-cooled probe suffers from insufficiently fast quenching, while the direct quench probe results are modified somewhat by gas absorption.