| 摘要 |
<p>The gas turbine rotor blade with multiple coolant paths has leading edge (21), central (22) and trailing edge (23, 24, 25) radial ducts in its aerofoil portion. These feed coolant to the outside surface via rows of holes (e.g. 29). The leading edge and (interconnected) trailing edge ducts receive coolant through an inlet (34) in the wheel rim face and a radial duct (37) in the blade root. A hollow cylinder sleeve (38) at the entry to the central duct keeps coolant out, this duct having a separate, lower pressure, supply through the sleeve end(s) and a cutout (41) in its wall. The sleeve also serves to blank off casting core support holes (42).</p> |
