A spoiler arranged on the front edge of a deep-open buried goods compartment
A technology for spoilers and articles, applied in the field of aviation testing, can solve the problems of high workload and cost, and no one has summed up the function relationship of the suction spoiler, so as to improve reliability, reduce costs, and be easy to implement. Effect
Active Publication Date: 2021-01-19
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology
But so far, no one has proposed the principle of drag-and-suction flow control, and no one has summarized the functional relationship of the drag-and-suction spoiler design. Instead, a large number of samples are designed according to the law of multi-parameter changes for CFD simulation or wind tunnel test optimization. method, the workload and cost are huge
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[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.
[0020] Such as figure 1 Shown is the relative position parameter description of spoiler 3 among the present invention and item compartment, the length of spoiler 3 is defined as L, and the deflection angle relative to the hatch plane 2 of item compartment is defined as θ, spoiler 3 The endpoint close to the front wall 1 of the cargo compartment and the hatch of the cargo compartment is defined as A, the lateral distance between the endpoint A and the front wall 1 of the cargo compartment is defined as X, and the vertical distance between the endpoint A and the hatch of the cargo compartment is defined as H. The thickness of the turbulent boundary layer at the leading edge 1 of the cargo...
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The invention relates to a spoiler arranged at the front edge of a depth-open type interior-embedded cargo compartment and belongs to the technical field of aviation tests. The invention designs the spoiler which is formed by merging two surfaces which are symmetrically arranged with an axis; the spoiler is provided with relatively sharp endpoints at two ends; one of the endpoints is mounted at the front edge of the cargo compartment with a certain deflection angle; and after impacting the windward side of the spoiler, oncoming air flows in front are lifted to move away from a compartment bodyto reduce the air flows in the compartment body, so as to reduce the impact force between the air flows and the rear wall of the cargo compartment and to achieve the noise reduction effect. The leeward side of the spoiler brings a good low-pressure area to attract the high-pressure air flows in the compartment body to flow toward the leeward side of the spoiler and then to flow out of the compartment body, and a large-scale vortex is formed in the compartment body to ensure the stability of the air flows at the rear wall surface of the cargo compartment and the reduction of aerodynamic noise.The spoiler arranged at the front edge of the depth-open type interior-embedded cargo compartment is clear in design principles and easy to implement, improves the reliability of the design and greatly reduces the design cost of the spoiler.
Description
technical field [0001] The invention belongs to the field of aviation test technology, and in particular relates to a spoiler arranged on the front edge of a deeply open embedded object compartment. Background technique [0002] With the development of aviation technology, some aircraft items and equipment need to be embedded. After the door was opened, severe aerodynamic noise was generated on the rear wall of the cargo compartment, which caused the structure of the rear wall of the cargo compartment to be easily fatigued and damaged, seriously reducing the economic service life of the aircraft. Therefore, it is necessary to design a flow control device that can effectively reduce the aerodynamic noise of the rear wall of the cargo compartment. [0003] Depth-open embedded item compartments with a length-to-depth ratio of 8 or less. [0004] At home and abroad, a lot of research work has been carried out from the perspective of raising the shear layer (that is, holding up...
Claims
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IPC IPC(8): B64C7/00
CPCB64C7/00
Inventor 管德会张来张沛良陈振龙衣然
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA