Aerodynamic Losses in Turbines with and without Film Cooling, as Influenced by Mainstream Turbulence, Surface Roughness, Airfoil Shape, and Mach Number

Table 4

Inclination and orientation angles for the RA, RC, RR, and SA film cooling hole configurations [55].

(a)

Inclination angles
Round axial		Round compound		Round radial		Shaped axial
First row	Second row	First row	Second row	First row	Second row	First row	Second row
65	60	18.06	17.22	20	20	55	50
Both row average inclination angle
62.5		17.64		20		52.5

(b)

Orientation angles
Round axial		Round compound		Round radial		Shaped axial
First row	Second row	First row	Second row	First row	Second row	First row	Second row
0	0	81.69	80.15	90	90	0	0
Both row average orientation angle
0		80.92		90		0