Numerical solutions for retouchment length and velocity-distributions -were obtained in the recirculating zone of the combustion chambers.

In this paper, a notion that there is steady recirculating zone in the flow field of asymmetry bluff-body is presented, based on the foregone mechanism of flame stab.

The recirculating and exhaust fans for each zone of the oven are of the plug fan type design to allow quick and easy replacement of the fan wheel, shaft and bearings if the need should ever arise.