在主动控制的多风扇风洞中产生非常规气流

IF 1.3 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Wind and Structures Pub Date : 2021-08-01 DOI:10.12989/WAS.2021.33.2.115

W. Cui, Lin Zhao, S. Cao, Y. Ge

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引用次数: 1

摘要

在本研究中，描述了一种基于迭代的方法来模拟多风扇风洞中非常规气流的两个典型例子：偏斜的非高斯湍流和正弦型瞬态阵风。气流由120个主动控制的风扇产生，这些风扇排列成10宽乘12高的矩阵。可以将随时间变化的电压信号输入到风机的伺服电机中，然后在该风洞中产生相应的气流。首先，将目标风速时间序列转换为电压信号，然后将电压信号输入到风扇的电机中，然后可以测量产生的初始风量。然后根据目标风速和测量流速之间的差异来调整要输入的风速时间序列。反复重复上述过程，直到测量的气流逐渐接近目标。最后，经过多次迭代，非高斯湍流和瞬态阵风都能得到满意的模拟精度。

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Generating unconventional wind flow in an activelycontrolled multi-fan wind tunnel

In this study, an iteration-based method to simulate two typical examples of unconventional wind flow in a multi-fan wind tunnel is described: skewed non-Gaussian turbulence and sinusoidal type transient gust. The air flows are generated by 120 actively controlled fans arranged in a 10 wide by 12 high matrix. Time-varying voltages signals can be imported into the fans' servomotors, then corresponding wind flow can be produced in this wind tunnel. At first, the target wind speeds time series are converted to voltages signals, which are input into the fans' motor next, and then the initial wind flow generated can be measured. Then the wind speeds time series to be input are adjusted according to the differences between the target winds speeds and measured flow speeds. The above procedure is iteratively repeated until the measured wind flow is gradually close to the targets. At last, both non-Gaussian turbulence and transient gust can be simulated with satisfied precision after several iterations.

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来源期刊

Wind and Structures 工程技术-工程：土木

CiteScore

2.70

自引率

18.80%

发文量

审稿时长

>12 weeks

期刊介绍： The WIND AND STRUCTURES, An International Journal, aims at: - Major publication channel for research in the general area of wind and structural engineering, - Wider distribution at more affordable subscription rates; - Faster reviewing and publication for manuscripts submitted. The main theme of the Journal is the wind effects on structures. Areas covered by the journal include: Wind loads and structural response, Bluff-body aerodynamics, Computational method, Wind tunnel modeling, Local wind environment, Codes and regulations, Wind effects on large scale structures.