The Influence of the Punched Delta Wings on Flow Pattern and Heat Transfer Characteristic in a Fin-and-Oval-Tube Heat Exchanger

Figure 13

Temperature contours on the fin surface for (a) = 20°, (b) = 30°, and (c) = 45° at PR = 2, Re = 2000, and = 30° with wing tip pointing upstream.

(a)

(b)

(c)