Investigation of the effect of co-axis free rotating propeller-type turbulators on the performance of heat exchanger

Heat transfer augmentation by swirl generators inserted into a tube with constant heat flux

“…Also, the pipe flow with various grooves (circular, trapezoidal and rectangular) at constant wall heat flux condition, and hollow rectangular fins surface is studied experimentally [8,9]. Co-axis free rotating propeller type turbulators are devised by Kurtbaş et al [10,11]. The effect of the turbulators on heat transfer and exergy loss is investigated experimentally.…”

The effect of different inlet conditions of air in a rectangular channel on convection heat transfer: Turbulence flow

“…Methods of the PHE have been extensively explored with the attempts to overcome the thermal problems subject to high heat flux [4]. A variety of surface ribs [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], perforated baffle [22][23][24][25][26][27], pin-fins [28][29][30][31][32], Snail, propeller, twisted and winglet-type vortex generators [33,34,30,[35][36][37][38][39][40][41][42][43][44][45][46] have been devised to enhance heat transfer rates in ducts. However, it is shown in the literature review that detail exploration of turned flow in the channel needs more extensive study.…”

On the role of inserts in forced convection heat transfer augmentation

“…The interesting features of the insert and its promising potential in many heat transfer applications such as heat exchangers, nuclear reactors, solar heaters, gas turbines and combustion chambers have promoted abundant studies [1][2][3][4][5][6][7][8]. The effect of the insert in the flow passage does not stem from the existence of a new phenomenon but, as pointed out in the previous studies, the heat transfer augmentation is attributed to either one or both of the following two mechanisms [9].…”