A double-channel s-curved nozzle
A dual-channel, nozzle technology, applied in the direction of jet propulsion devices, machines/engines, etc., can solve the problems of limited space layout, difficulty in ensuring full shading and high aerodynamic performance at the same time, and achieve high aerodynamic performance
Active Publication Date: 2021-04-02
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
Since the stealth aircraft has high requirements for the design of the aircraft profile, there must be enough space to install the nozzle in order to meet the full shielding in the prior art, and because the spatial layout of the tail nozzle position of the stealth aircraft engine is limited, this leads to the design It is difficult to ensure the design requirements of full shielding of high-temperature components at the nozzle inlet and high aerodynamic performance at the same time
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[0024] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0025] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.
[0026] Embodiment of the present invention i...
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The invention discloses a double-flow-path S-bending spraying pipe. The double-flow-path S-bending spraying pipe comprises an S-shaped contraction section, a value-equation section and an S-shaped diversion plate; the first end of the S-shaped contraction section is provided with an air inlet which is connected to an engine high-temperature turbine outlet; the value-equation section is connected to the tail part of the S-shaped contraction section through a connection part and is provided with an air exhausting opening; the left and right sides of the S-shaped diversion plate are connected tothe left and right side wall surfaces of the S-shaped contraction section through welding; and the shape of the S-shaped diversion plate is matched with the shapes of the upper and lower surfaces of the S-shaped contraction section. By adopting the double-flow-path S-bending spraying pipe, complete baffling of the engine high-temperature turbine outlet can be realized by the S-bending spraying pipe on the condition of small setover; meanwhile, high pneumatic performance of the spraying pipe can be ensured; and the problem in the prior art that when spraying pipe space arrangement is limited, complete baffling of the engine high-temperature turbine outlet is difficult to ensure on the premise of high pneumatic performance.
Description
technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to a double-channel S-curved nozzle. Background technique [0002] For an aero-engine, the radiation signal of its exhaust nozzle has an important influence on the stealth performance of the aircraft. The infrared radiation of the nozzle comes from the detectable hot wall of the nozzle and the hot jet discharged through the nozzle. The reflection of the nozzle to the radar wave depends on the cavity reflection of the nozzle cavity and the frontal echo of the turbine blade. In view of the radiation characteristics of the nozzle, the S-bend nozzle has obvious low detectable advantages: (1) The "S"-shaped curved surface of the S-bend nozzle can effectively shield the high-temperature components inside the engine, and significantly reduce the heat of the nozzle. Infrared radiation intensity of the wall surface; (2) The non-axisymmetric binary outlet form can strengthen the mixi...
Claims
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IPC IPC(8): F02K1/78
CPCF02K1/78
Inventor 孟钰博王占学史经纬周莉
Owner NORTHWESTERN POLYTECHNICAL UNIV