Comparison of heat transfer augmentation techniques

A comparison of heat transfer augmentation techniques was presented. A variety of techniques were used for enhancing convective heat transfer rates in gas turbine engine passages used for internal cooling of turbine airfoils. These included rib turbulators, pin fins, dimpled surfaces, swirl chambers, and surface roughness. The overall objective of each device examined and future heat augmentation devices under development is improvement in high-thermal-performance parameters.