| 摘要 |
A turbine nozzle (20) comprising: a row of vanes (26) extending radially between inner and outer bands (28, 30) and having opposite pressure and suction sides (32, 34) defining corresponding flow passages converging between opposite leading and trailing edges (36, 38); said inner band includes an inboard side (28) bounding said flow passages, an opposite outboard side (30) facing radially inwardly, a mounting flange (48) disposed between opposite forward and and aft lips (44, 46) and a row of aft pockets (58) recessed in said outboard side between said flange and aft lip and corresponding impingement bores (60) extending through said flange into each of said aft pockets; said aft pockets include a forward wall (62) along said flange, an aft wall (64) along said aft lip, a windward half (66) extending outwardly from said vane suction side, and an opposite leeward half (68); and said impingement bores extend into said windward halves, and are directed aft toward said aft walls and leeward halves of said pockets for co-rotation with purge flow during operation.
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