Variable flame burner configuration

A burner comprising a plurality of nozzles, at least one of said nozzles being a processing jet nozzle having a first fuel/air mixing characteristic to provide a first flame and at least one additional nozzle having a second fuel/air mixing characteristic different from said first mixing characteristic for providing a second flame different from said first flame, said nozzles being disposed adjacent each other to provide a combined flame different from said first and second flames,

• wherein said at least one processing jet nozzle is comprised of a fluid mixing nozzle in which operation of a primary flow of a first fluid separates from an internal wall structure and reattaches itself asymmetrically to the wall structure upstream of a nozzle outlet whereby a flow of a second fluid is induced through the outlet swirling in a chamber between a point where said first fluid separates from said wall structure and a second point where said fluid reattaches itself to said wall structure for inducing precession of the separated and reattached flow which exits said nozzle asymmetrically.