TURBINE COMPONENT WITH MULTI - SCALE TURBULATION FEATURES

摘要

Turbine component with an interior coating surface comprising multi- scale turbulation features, including first turbulators (46, 48) formed on a cooling surface (44), and smaller turbulators (52, 54, 58, 62) formed on the first turbulators. The first turbulators may be formed between larger turbulators (50). The first turbulators may be alternating ridges (46) and valleys (48). The smaller turbulators may be concave surface features such as dimples (62) and grooves (54), and/or convex surface features such as bumps (58) and smaller ridges (52). An arrangement with convex turbulators (52, 58) in the valleys (48) and concave turbulators (54, 62) on the ridges (46) increases the cooling surface area, reduces boundary layer separation, avoids coolant shadowing and stagnation, and reduces component mass.