Abstract
Formerly1), the author pointed out that the burner jet is an important constituent of the open-hearth furnace and the combustion is controlled by changing the quantity of the atomizing agent.
The present paper deals essentially with changing flow patterns in furnaces by auxiliary jets. Flow patterns are changed, reinforced and corrected by a jet from the roof or the side walls.
An eddy spot appears behind the jet, the jet makes a temporary wall which is invisible aerodynamic), flexible (controllable) and free from wear.
It is not the jet quantity but the jet momentum that makes the jet effective. The auxiliary jet with smaller quantity and higher velocity is preferable, and either the kind of jet gas (air, oxygen of stream) or the temperature of it is of no significance.
