Numerical Investigation of Multi Square Jet Impingement for a Semi- Confined Channel.

In this paper array of square jets from an orifice plate impinging to a target plate is taken into consideration. Jet density is represented with dimensionless jet-to-jet pitches (Xn/d for spanwise, Yn/d for streamwise). Xn/d and Yn/d are assumed to be equal and vary from 2 to 4. Distance between orifice plate and target plate is represented by dimensionless distance Zn/d, which is changed from 2 to 4. The Reynolds number is taken as 5000, 10000 and 15000. Numerical results are discussed for different Reynolds numbers, jet-to-jet pitches (Xn/d, Yn/d), and jet-to-target plate distances (Zn/d). Finally it is found that, decreasing the jet-to-jet pitches results in a single channel flow characterization. Similarly decreasing the jet-to-target plate distances causes same effect on impingement. [ABSTRACT FROM AUTHOR]