| 摘要 |
PURPOSE: To suppress incidental leakage of an engine operation medium in a minimum level by twisting and discharging air from an orifice in a top end part adjacent to the pressure surface of air foil of an inner air cooling turbine blade to the rotary shaft of the blade so as to lead it from the inside of the blade into a space and by providing a butter zone in the space. CONSTITUTION: Cooling air is supplied into a blade on the root of a blade lowest part by operation of an engine, and advanced toward a top end through an air foil part. An orifices 50, 52 are faced so as to lead flow of air discharged from a feed chamber 26 and a feed chamber 32 toward the pressure surface 14 of the blade at a prescribed angle. A buffer zone is formed in a space formed between the top end of the blade and a shroud for enclosing the blade, flow speed of air discharged through the orifices 50, 52 is raised by pump action of the blade, and thereby, it is possible to suppress incidental leakage of an engine operation medium in the minimum level.
|
