FIELD: engines and pumps.
SUBSTANCE: nacelle includes device for reduction, annulment or reversing of thrust, which contains at least one shutter provided with possibility of occupying the working position, in which it diverts at least some portion of flow in direction of radial opening, which is capable of participating in thrust creation, and non-working position, in which the shutter creates no obstacle to the flow capable of participating in thrust creation. Nacelle includes at least one fixed part and at least one moving part having the possibility of occupying the first position, in which fixed and moving parts are adjacent to each other, and the second position, in which a radial opening is formed between fixed and moving parts. Moving part includes a cavity between the wall corresponding to external nacelle surface and the wall corresponding to internal nacelle surface. Cavity is arranged at the level of zone of moving part having the possibility of coming into contact with fixed part and has corresponding sizes and shapes to provide the arrangement of shutter so that when in the first position, moving part is located between the flow that shall be diverted and shutter, and when in the second position, moving part releases the shutter, thus allowing the above shutter to change the position and move from non-working position to working position. Each shutter includes means of hinged connection to the first rotary axis located at the level of the first end called upper end of shutter, and in upper part of nacelle, and to the second rotary axis located at the level of the second end called lower end of shutter, and in lower part of nacelle. Rotary axes are mainly parallel to central vertical axis of nacelle. Fixed part includes backward elongation in upper part and backward elongation in lower part; at that, those elongations carry rotary axes.
EFFECT: optimisation of sound insulation; no negative impact on aerodynamic characteristics is provided and flying weight is increased at simple design.
8 cl, 18 dwg
