赤外線レーザー吸収法による燃焼室壁面付近の燃料濃度の計測 : 単一壁面上の燃料濃度(熱工学,内燃機関,動力など)

概要

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The concentration of the unburned fuel in the quenching layer on the single surface of the combustion chamber is measured by the infra-red laser absorption method. The combustion chamber is divided into two rooms with a partition that has two holes covered with fine meshed gauze. After the propane-air mixture is ignited by a spark plug, the flame develops and quenches at the partition in the upper room. Though the mixture in the lower room is remained unburned, both rooms are the same pressure. Two laser beams are introduced into the chamber. One is used to measure the fuel concentration near the quenching plate in the upper room and the other to measure the mixture concentration in the lower room. The fuel concentration near the quenching plate is obtained by analyzing two laser intensities. The quenching layer is observed just after the flame arrival near the surface of the quenching plate. Then a little fuel diffuses into the burned gas but almost fuel stays near the surface of the quenching plate.
2009-11-25