GEOMETRY AND FLOW INFLUENCES ON JET MIXING IN A CYLINDRICAL DUCT

To examine the mixing characteristics of jets in an axisymmetric can g eometry, temperature measurements were obtained downstream of a row of cold jets injected into a heated cross stream. Parametric, nonreactin g experiments were conducted to determine the influence of geometry an d flow variations on mixing patterns in a cylindrical configuration, R esults show that jet-to-mainstream momentum-nux ratio and orifice geom etry significantly impact the mixing characteristics of jets in a can geometry. For a fixed number of orifices, the coupling between momentu m-flux ratio and injector geometry determines 1) the degree of jet pen etration at the injection plane and 2) the extent of circumferential m ixing downstream of the injection plane. The results also show that, a t a fixed momentum-flux ratio, jet penetration decreases with 1) an in crease in slanted slot aspect ratio and 2) an increase in the angle of the slots with respect to the mainstream direction.