International Journal of Rotating Machinery / 2013 / Article / Fig 30

Review Article

Heat Transfer Augmentation Technologies for Internal Cooling of Turbine Components of Gas Turbine Engines

Figure 30

Comparisons of relative performance of rib turbulators, pin fins, swirl chambers, dimple-smooth arrangements, dimple-protrusion arrangements, dimple-dimple arrangements, surface roughness, and smooth-walled channels [1], with results from rotation experiments [128, 173]. Globally averaged Nusselt number ratios are presented as dependent upon friction factor ratios .