Impacts of Double V-Rings in the Heat Exchanger Duct on Heat Transfer and Flow Behaviors: A Numerical Study

Table 1

Case studies of the HED fitted with the DVR.

DVR type	Flow attack angle (α)	a/H	b/H	Flow direction	Reynolds number
Type I	30°	0.025, 0.05, 0.075, 0.1	0.05, 0.10, 0.15, 0.20	V-upstream	100–2000
				V-downstream
Type II	30°	0.025, 0.05, 0.075, 0.1	0.05, 0.10, 0.15, 0.20	V-upstream	100–2000
				V-downstream
Type III	30°	0.025, 0.05, 0.075, 0.1	0.05, 0.10, 0.15, 0.20	V-upstream	100–2000
				V-downstream