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Experimental investigation on non-stationary wind loading effects generated with a multi-blade flow device

机译：用多刀片流量装置产生非平稳风装效果的实验研究

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Overcoming the spatial constraints of the small-scale wind tunnel at Northeastern University, a multi-blade flow device (MBFD) has been installed within the facility's test chamber to generate ramps in measured wind velocities by redirecting horizontally driven flows. As a continuation feasibility study, this paper analyzes the aerodynamic loads imparted on a building model from these simulated non-stationary outflows. Base forces are recorded with a high-frequency force balance sensor (HFFB) and compared to digital simulations using a modified quasi-steady aerodynamic load approach. Under certain conditions, the forces obtained from both physical and numerical procedures coincide well with each other, although differences arise due to assumptions and deficiencies in the modeling. Nonetheless, results indicate that altering horizontal flows with this device is suitable for replicating non-stationary aerodynamic loads, within the confines of a small-scale wind, "straight" tunnel. (C) 2020 Elsevier Ltd. All rights reserved.
机译：克服了东北大学小型风洞的空间限制，在设施的测试室内安装了一种多刀片流量装置（MBFD），以通过重定向水平驱动的流动来产生测量的风速中的斜坡。作为延续可行性研究，本文分析了从这些模拟的非平稳流出的建筑模型上施加的空气动力学载荷。基部力用高频力平衡传感器（HFFB）记录，并使用改进的准稳态空气动力载荷方法与数字模拟进行比较。在某些条件下，从物理和数值程序获得的力彼此相互作合，尽管由于建模中的假设和缺陷而产生的差异。尽管如此，结果表明，利用该装置改变水平流量适用于复制非静止空气动力载荷，在小规模风“直”隧道的范围内。 （c）2020 elestvier有限公司保留所有权利。

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