| 摘要 |
The invention proposes a long life nozzle flap for aircraft turbojets. This flap is remarkable in that it is composed of a hollow tapered body ( 10 ) flattened in the transverse direction along straight geometric generating lines ( 11 ), the body ( 10 ) forming a thin wall ( 12 ) with an approximately constant thickness E, this wall ( 12 ) comprising a continuous inner surface with a radius of curvature equal to at least 2xE, the wall ( 12 ) being made of a refractory composite material composed of reinforcing fibers ( 18 ) embedded in a matrix also made from a refractory material, the reinforcing fibers ( 18 ) being arranged in a plurality of continuous layers of fibers ( 18 ) stacked on each other, the fibers ( 18 a) of a layer crossing the fibers ( 18 b) of any adjacent layer.
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