首页>
外文会议>Heat Transfer
>INTERACTION OF FILM COOLING ROWS: EFFECTS OF HOLE GEOMETRY AND ROW SPACING ON THE COOLING PERFORMANCE DOWNSTREAM OF THE SECOND ROW OF HOLES
【24h】
INTERACTION OF FILM COOLING ROWS: EFFECTS OF HOLE GEOMETRY AND ROW SPACING ON THE COOLING PERFORMANCE DOWNSTREAM OF THE SECOND ROW OF HOLES
A comprehensive set of generic experiments is conducted to investigate the interaction of film cooling rows. Five different film cooling configurations are considered on a large scale basis each consisting of two rows of film cooling holes in staggered arrangement. The hole pitch to diameter ratio within each row is kept constant at P/D=4. The spacing between the rows is either x/D=10, 20, or 30. Fanshaped holes or simple cylindrical holes with an inclination angle of 30 deg. and a hole length of 6 hole diameters are used. With a hot gas Mach number of Ma_m=0.3, an engine like density ratio of ρ_c/ρ_m=1.75, and a freestream turbulence intensity of Tu=5.1% are established. Operating conditions are varied in terms of blowing ratio for the upstream and, independently, the downstream row in the range 0.5展开▼
机译:进行了一套全面的通用实验,以研究薄膜冷却排之间的相互作用。大规模考虑了五种不同的薄膜冷却配置,每个配置由两排交错排列的薄膜冷却孔组成。每行内的孔节距与直径之比保持恒定在P / D = 4。行之间的间距是x / D = 10、20或30。扇形孔或倾斜角度为30度的简单圆柱孔。使用的孔长为6个孔径。在马赫数为Ma_m = 0.3的热气马赫数的情况下,建立了密度比为ρ_c/ρ_m= 1.75的发动机,并且自由流湍流强度为Tu = 5.1%。根据上游和独立地下游排的鼓风比,操作条件在0.5 展开▼