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首页> 外文期刊>International Journal of Applied Engineering Research >Small-Scale Open-Circuit Wind Tunnel: Design Criteria, Construction and Calibration
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Small-Scale Open-Circuit Wind Tunnel: Design Criteria, Construction and Calibration

机译：小型开路风隧道：设计标准，施工和校准

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摘要

The present paper deals with a study of very small-scale open-loop wind tunnel design and test. To verify the proposed design criteria, an open-circuit small-scale wind tunnel was built and tested. The designed wind tunnel is composed by a settling chamber, a contraction section, a test section, a diffuser as well as a fan. The test chamber has a squared cross section of 5 × 5 cm and an on-design flow velocity of about 6 m/s. Particle Image Velocimetry was used to measure flow-field and flow main characteristics. Turbulence Intensity at different test chamber cross-sections was determined. The measured turbulence level was about 0.4% at the test section entrance. A small increase in the turbulence intensity was registered along the test section. The obtained results were acceptable for a wind tunnel of that scale. Therefore, this wind tunnel may be used, for example, to test the flow-field around aerofoils. A preliminary test on a NACA 0012 aerofoil was carried out. The result proved to be compatible with the aerodynamics theory as well as the scientific literature. Thus, the wind tunnel results may be used to calibrate and verify Computational Fluid Dynamics mathematical models.
机译：本文涉及对非常小的开环风洞设计和测试的研究。为了验证所提出的设计标准，建立和测试了开放式小型风洞。设计的风洞由沉降室，收缩部分，测试部分，扩散器以及风扇组成。测试室的平方横截面为5×5cm，设计的开启式流速为约6米/秒。粒子图像VELOCIMETRY用于测量流场和流量的主要特性。确定了不同测试室横截面的湍流强度。在试验部分入口处测量的湍流水平约为0.4％。沿着试验部分登记湍流强度的小幅增加。获得的结果是可接受的那种规模的风洞。因此，可以使用该风隧道，例如，以测试空气膜周围的流场。进行了对NaCA 0012机翼的初步试验。结果证明与空气动力学理论以及科学文献兼容。因此，风隧道结果可用于校准和验证计算流体动力学数学模型。

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