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

Figure 19

(a) Nu versus Re, (b) Nu/Nu₀ versus Re, (c) versus Re, (d) versus Re, and (e) TEF versus Re at various for PR = 2 with wing tip pointing upstream.

(a)

(b)

(c)

(d)

(e)