Next Generation Wind Tunnel for Aerodynamic and Atmospheric Boundary Layer Simulation and Testing

本项目是在爱荷华州立大学设计和建造一个用于空气动力学和大气边界层模拟和测试的风洞。它通过建立一个代表新一代边界层风洞的设施来解决风危害研究和教育基础设施的投资需求，该风洞设计用于更逼真地模拟极端风。极端风荷载来自极端天气事件（阵风锋、雷暴、飓风），其中非静止阵风、过渡流结构和风向的快速变化可能起重要作用。目前最先进的边界层风洞无法模拟这样的事件。在目前的实践中，通常的假设是大气风被充分地模拟为平稳的平均和湍流流动特性。对小尺度湍流进行充分的建模是很重要的，并且需要能够在相对较大的测试区域内产生较高的速度。本项目的风洞设计包括两个试验段（2.44米× 1.83米和2.44米× 2.21米），能够产生阵风、主动湍流和50米/秒的高速。它将成为风模拟和测试实验室的一部分，该实验室还包括一个龙卷风模拟器、一个微爆模拟器和一个开路风洞

This project is to design and build a wind tunnel for aerodynamic and atmospheric boundary layer simulation and testing at Iowa State University. It address the need for investment in wind hazard research and education infrastructure by building a facility that represents a new generation of boundary layer wind tunnels designed for more realistic simulation of extreme winds. Extreme wind loads result from extreme weather events (gust fronts, thunderstorms, hurricanes) where non-stationary gusts, transitional flow structures and rapid wind directionality changes might play a significant role. The current state-of-the-art boundary layer wind tunnels cannot simulate such events. The usual assumption in current practice is that atmospheric wind is adequately simulated with stationary mean and turbulence flow properties. Adequate modeling of small-scale turbulence is important and requires a capability to generate high velocities in a relatively large test section. The wind tunnel design in this project incorporates two test sections (2.44m x 1.83 m and 2.44 m x 2.21 m) with capabilities to generate gusts, active turbulence, and a high velocity of 50m/s. It will be part of the Wind Simulation and Testing Laboratory that also includes a tornado simulator, a microburst simulator, and an open circuit wind tunnel