Experimental investigation of heat transfer in a channel with new winglet-type vortex generators

Numerical simulation on performances of plane and curved winglet – Pair vortex generators in a rectangular channel and field synergy analysis

“…The results indicated that curved trapezoidal winglet pair performed better in fully turbulent region with higher heat transfer enhancement and lower pressure loss. Caliskan [16] studied the heat transfer enhancement of punched LVGs using the infrared thermal image technique. He reported 23e55% increase in heat transfer performance and correlations for Nu were developed for corresponding LVGs.…”

Forced convection on grey cast iron plate-fins: Prediction of the heat transfer coefficient

“…Once the fin convective coefficient is determined by the inverse technique, the heat transfer rate per unit length, q fin , is calculated from integration over the finned surface. Despite the glasswool fiber insulation, heat losses in the region surrounding the fin base, q loss , take place and were estimated experimentally in the standard way, i.e., thermocouples are placed to evaluate the temperature gradient in the thermal insulator [22], from which the heat losses were computed using the corresponding thermal conductivity. Therefore, the differences in the heat transfer rate per unit length must account for the energy effectively transferred to the fin, q P,-fin = q E − q loss , so that Δq fin =q E,fin − q fin [W/m].…”

Numerical Investigation on Performance Improvement in Tube Inserted with Delta Winglets on Discrete Right-Angled Triangular Plates

“…The winglet (Caliskan, 2014;Gholami et al, 2014;He et al, 2012;Khoshvaght-Aliabadi et al, 2015;Wang et al, 2015) is a type of the vortex generator, which always uses to augment heat transfer rate and thermal performance. The researchers found that the winglet has high effectiveness to improve performance of thermal system when compared with the other types of the vortex generators.…”