Simulation of Outdoor Near-Surface Airflows Based on a Wind Tunnel with Multiple Actively-Controlled Fans

Abstract:

In this paper, multiple actively-controlled fans generate outdoor near-surface airflow in a wind tunnel with once-through openings. The wind tunnel system consists of 6 groups of fans installed on rotatable plates in a rectangular inlet. We use a stochastic strategy to control the fans and the rotatable plates to regulate wind speed and direction that fluctuate according to the pattern of outdoor near-surface airflow. We utilize the statistics and multi-scale methods to analyze the effectiveness of the strategy for simulating the outdoor near-surface airflow. We provide comparison studies on the multi-scale entropy of wind speed, wind stability, and the standard deviation of directions between out-door wind and the tunnel generated wind. Results show that a flow field akin to the near-surface airflow in outdoor environments can be produced by the wind tunnel using the stochastic control strategy, which can be considered as a reliable experiment environment for gas pollution source localization research in outdoor near-surface breeze conditions.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 102-105
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.102
• Online since: September 2013
• Authors: Qian Wang, Qing Hao Meng, Yan Peng Man, Jia Ying Wang, Ming Zeng, Wei Li
• Keywords: Multiple Actively-Controlled Fans, Multi-Scale Entropy, Simulation of Airflows, Standard Deviation of Wind Direction, Wind Direction Stability, Wind Tunnel

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