Abstract
In the present study, a flow field developed in an opposed jet burner and its turbulence characteristics were measured in detail using a hot-wire anemometer. The flame structure was clarified by schlieren photographs and instantaneous temperature measurements with a thermocouple. Extremely strong turbulence of small scale is generated by impingement of two mixture flows. For the case of a low mixture supply velocity, a flame within the transition regime from a wrinkled laminar flame to a distributed reaction zone is produced in the opposed jet burner. With increasing the mixture supply velocity, the structure of the flame zone changes to the distributed reaction zone. These two types of structure correspond to those of region 2 and region 3 of the 3-region model of the turbulent premixed flame structure.
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