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

该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。它通过建立一个设施来满足对风灾研究和教育基础设施的投资需求，该设施代表了为更真实地模拟极端风而设计的新一代边界层风洞。极端风载是由极端天气事件(阵风锋面、雷暴、飓风)造成的，其中非平稳阵风、过渡性气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，通常的假设是用定常的平均和湍流特性来充分模拟大气风。对小尺度湍流进行适当的建模是很重要的，并且需要能够在相对较大的测试段中产生高速度。本项目中的风洞设计包括两个试验段(2.44米x 1.83米和2.44米x 2.21米)，能够产生阵风、活跃的湍流和50米/S的高速。它将是风模拟与测试实验室的一部分，该实验室还包括龙卷风模拟器、微爆发模拟器和开路风洞

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