...Chien-Shing Lee; Tom I-P. Shih; Douglas Straub; Justin Weber The adiabatic effectiveness of film cooling (η) has been characterized by the density (DR h ) and blowing (BR h ) ratios. In this study, dimensional analysis and computations based on Reynolds-averaged Navier–Stokes (RANS) were performed...

... be taken into account. The aim of the present work is to detail the film-cooling performance in terms of adiabatic effectiveness and external heat transfer coefficient on a 2D nozzle guide vane. A single row of cylindrical holes was tested on both pressure and suction sides of a literature vane, the VKI...

..., increases in the coolant flowrate from M = 0.5 to 1 resulted in increases in the adiabatic effectiveness. At flowrates above M = 1, Fig. 5 shows that coolant patterns on the surface began to narrow and continued to do so as the blowing ratio increased. Figure 6 gives the laterally-averaged...

... may lead not only to a reduction in coolant flow but more importantly to decay of the film-cooling adiabatic effectiveness. For this reason, a test campaign has been conducted in collaboration with the University of Florence (Italy) with the objective of characterizing the performance (minimum passage...

... the laterally averaged data streamwise from x ∕ d = 0 to 25, the same range shown in all laterally averaged plots. Adiabatic effectiveness measurements were obtained from surface temperature measurements using infrared thermography via a FLIR ThermaCAM P20 camera. The camera was calibrated using...

... adiabatic effectiveness data. Flow parameters of blowing ratio, density ratio, and turbulence intensity were independently varied. In addition to a baseline geometry, nine trench configurations were tested, all with a depth of 1 ∕ 2 hole diameter, with varying widths, and with perpendicular and inclined...