The invention belongs to the technical field of aircraft vibration design, and particularly relates to a spoiler for improving transonic low-frequency vibration of a rear fuselage and an aircraft with the spoiler. The spoiler (1) is in a triangular cone shape, is arranged on the lower surface (2) of a rear fuselage of an aircraft and is provided with a first edge (11) facing the incoming flow direction, left and right triangles (12) connected with the first edge and used for shunting and upper and lower triangles (13) connected with the upper and lower ends of the first edge (11), and the upper and lower triangles (13) intersect at the tail end of the spoiler in the incoming flow direction to form a second edge (14). And the upper triangle is in contact connection with the lower surface (2) of the rear fuselage of the aircraft. Energy is injected into low-energy fluid of the boundary layer of the fuselage of the aircraft after the low-energy fluid passes through the spoilers, nearby local flow is changed, the strength of shock waves is greatly weakened, and the amplitude of low-frequency vibration of the fuselage is reduced by about 40%. The vibration generated by the rear fuselage at the transonic speed can be effectively reduced.
本申请属于飞机振动设计技术领域,特别涉及一种改善后机身跨音速低频振动的扰流片及具有其的飞机。扰流片(1)为三角锥形,布置在飞机后机身下表面(2),其具有朝向来流方向的第一棱边(11),与第一棱边连接的用于分流的左右侧三角形(12),以及与第一棱边(11)上下端部连接的上下侧三角形(13),上下侧三角形(13)在沿来流方向的扰流片末端交汇,形成第二棱边(14),上侧三角形与飞机后机身下表面(2)相接触连接。本申请提供的飞机机身附面层的低能流体经过系列扰流片后被注入能量,改变了附近的局部流动,大幅度削弱了激波的强度,机体低频振动的振幅降低40%左右。本申请能够有效减小后机身在跨音速下产生的振动。
Spoiler for improving transonic low-frequency vibration of rear fuselage and aircraft with spoiler
一种改善后机身跨音速低频振动的扰流片及具有其的飞机
2023-11-21
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |