| 摘要 |
The combustion chamber, e.g. for an air craft jet or turboprop engine, made with primary or dilution air inlet ports (52, 54) formed by stamping so their edges (66) project inside the chamber, has slits (90) in the edges of the ports to reduce stresses. The slits are less than 1 mm, e.g. 0.5 mm, wide, and extend from the edges of the ports as far as holes (92) between 1 and 2 mm in diameter designed to prevent crack propagation. Made e.g. by laser cutting, the slits are spaced evenly round the edges of the ports and are either straight or curved in shape. The ports themselves are located in combustion chamber zones most susceptible to cracking. |
