Heat transfer enhancement in cross-flow heat exchangers using oval tubes and multiple delta winglets

Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger

“…Prabhakar et al [12] worked on an oval tube-fin heat exchanger with nine different arrangements of delta winglet vortex generators. Some other related works [13,14] are also available in the literature.…”

Effect of concave rectangular winglet vortex generator on convection coefficient of heat transfer

“…Torii et al using two types of the winglet, the common flow up and the common flow down. Multiple delta winglet VG with various configurations of the heat exchanger with oval tube investigated by Tiwari et al [12]. Tiwari et al observed that average spanwise Nusselt number increase of 100% using four pairs of winglet VG with a staggered arrangement.…”

An investigation of the thermo-hydraulic performance of the smooth wavy fin-and-elliptical tube heat exchangers utilizing new type vortex generators

“…Lemouedda et al [55] and Zeng et al [56] optimized an FTHE with winglet VGs by a genetic algorithm (NSGA II) and the Taguchi method, respectively. In conjunction with the influence of location of the VG pairs on the heat transfer enhancement of fin-and-elliptical tube heat exchangers, Tiwari et al [57] and Prabhakar et al [58] showed that a two winglet VG pairs configuration at nearby up-and downstream side of an elliptical tube was more efficient than the single winglet VG pair at the same Reynolds number.…”