Wind tunnel test gust generator

A generation device and wind tunnel experiment technology, which is applied in the field of aircraft gust wind tunnel experiment research, can solve the problems of single gust type, inability to install independently, poor flexibility, etc., and achieve the effect of rich flow field

Pending Publication Date: 2018-04-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The gust generator designed by this method is often attached to the wind tunnel installation, and has poor flexibility. It is impossible to adjust the distance and height between the gust generator and the experimental model according to the size and shape of the aircraft and the special requirements of the wind field, so as to adjust The range of flow field where the experimental model is located
At the same time, the gust generator designed b

Method used

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0024] This embodiment provides a gust generating device for wind tunnel experiments, including a driving mechanism, a cascade swing mechanism, a control system and a frame.

[0025] The drive mechanism includes a main shaft 1, a synchronous pulley 2, a horizontal bearing seat 3, a first connecting rod 4, a rack 5 and a slider 6. The first connecting rod 4 and the synchronous pulley 2, the first connecting rod 4 and the rack 5 are all connected by bolt self-aligning bearings 12. There are 7 groups of threaded holes with different distances from the shaft center on the synchronous pulley 2, such as figure 2 As shown, the length of the crank can be changed to achieve the purpose of changing the swing of the cascade. The first connecting rod 4 and the...

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Abstract

The invention discloses a gust generating device for wind tunnel experiments, which relates to the field of aircraft aerodynamic experiment research, can realize gust load slowing down and actively control the gust flow field environment required for wind tunnel experimental research, and is useful for the structural design of aircraft and improving the safety of aircraft Sex and comfort provide an important theoretical basis. The invention includes: the gust generator is a longitudinal gust generator, which can generate a stable simple harmonic flow field in the vertical direction, and is mainly composed of a driving mechanism, a blade cascade swing mechanism, a control system and a frame. The invention is applicable to the field of experimental gust generation.

Description

technical field [0001] The invention relates to the research field of aircraft gust wind tunnel experiments, in particular to a gust generating device for wind tunnel experiments. Background technique [0002] Aircraft gust wind tunnel experiments have specific requirements for the wind field, and generally require that the incoming flow in front of the aircraft is unsteady and time-varying non-uniform airflow. In order to achieve the required gust environment in wind tunnel experiments, it is usually necessary to install a specific gust generating device at the wind tunnel mouth. A more conventional approach is to design a set of cascades driven by a motor-driven four-bar mechanism at the exit of the wind tunnel, and change the direction of flow at the exit of the wind tunnel through the swing of the cascades, thereby realizing the change of wind speed in the vertical direction. The gust generator designed by this method is often attached to the wind tunnel installation, a...

Claims

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Application Information

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IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 芮俊俊孙旭炳于明礼李明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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