VELOCITY-MEASUREMENTS IN A STRONGLY SWIRLING NATURAL-GAS FLAME

The present study was focused on the turbulent velocity held of a cent ral annular natural gas jet which penetrated a strongly swirling air f low. Due to the high swirl number S = 0.95 and the high momentum ratio , the fuel jet was almost immediately integrated into the air stream. High rates of shear resulted in an intensive turbulent mixing process between natural gas and air. The central hub of the fuel exit annulus stabilized the reverse how zone at a fixed location. The present nozzl e configuration resulted in a very stable and symmetric flame.