| Whole Machine and System Design |
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| Design of high-speed moving belt device for ground effect simulation in aviation wind tunnel |
Pengchun LI( ),Junmin LIU,Dekai ZHOU(),Longqiu LI |
| School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China |
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Abstract It is of great significance to study the ground effect of aircraft during its operation. Due to the existence of viscous boundary layer, the wind tunnel simulation test by fixed floor simulation technology widely used in China is seriously inconsistent with the real situation. Therefore, a high-speed moving belt simulation device with large scale of 4 m × 3.4 m was developed. Driven by a single motor, the master and slave rolls drived the moving belt to make its upper surface linear velocity consistent with the wind tunnel flow velocity, which eliminated the boundary layer to accurately simulate the ground effect. The segmented machining method of the master and slave rolls with large length-diameter ratio was proposed, and the connection between the outer cylinder and the mandrel was realized by the interference assembly connection, which avoided the thermal deformation caused by conventional welding method, and significantly reduced the unbalance of the moving belt under high-speed operation. The fast servo correction system was designed to keep the offset of the moving belt within 5 mm. Combined with the distributed control system, the stable operation of each system of the moving belt device was realized. In the ground test, the linear speed of the moving belt could be stabilized at about 54 m/s with a speed error of about 0.25%, and the overall vibration of the moving belt was inhibited at about 0.1 mm. The moving belt device developed becomes one of the largest ground effect simulation equipment in China and has broad application prospects in wind tunnel ground effect simulation and testing.
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Received: 25 March 2024
Published: 26 August 2024
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Corresponding Authors:
Dekai ZHOU
E-mail: lpc2zx@163.com;dekaizhou @hit.edu.cn
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面向航空风洞地面效应模拟的高速移动带地板装置的设计
研究飞行器在运行过程中的地面效应对其研制具有重要意义。目前国内广泛采用固定地板模拟技术，而黏性附面层的存在导致风洞模拟试验与真实情况严重不符。为此，研制了一种4.0 m×3.4 m的大幅面高速移动带地板模拟装置。采用单电机驱动的主从动辊带动移动带，使其上表面的线速度与风洞来流速度一致，从而消除附面层，准确模拟地面效应。提出了大长径比主从动辊分段加工方法，并采用过盈装配连接方式实现外筒与芯轴的连接，避免了常规焊接手段引起的热变形，显著减小了移动带在高速运行下的不平衡量；设计了快速伺服纠偏系统，使移动带偏移量保持在5 mm以内，并结合分布式控制系统，实现了移动带地板装置各系统的稳定运行；在地面测试中，移动带线速度可稳定在54 m/s左右，速度误差为0.25%左右，且移动带整体振动量抑制在0.1 mm左右。所研制的移动带地板装置成为国内最大的地面效应模拟装备之一，在风洞地面效应模拟与测试中具有广阔的应用前景。
关键词：
航空,
飞行器,
风洞,
地面效应,
移动带地板装置
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