MRI: Development of a Versatile, Self-Configuring Turbulent Flow Condition System for a Shared-Use Hybrid Low-Speed Wind Tunnel

MRI：为共享混合低速风洞开发多功能、自配置湍流条件系统

基本信息

批准号：
1428954
负责人：
Forrest Masters
金额：
$ 92.14万
依托单位：
University of Florida
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-09-01 至 2019-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1428954&HistoricalAwards=false
关键词：
MRI Development Versatile Self Configuring

项目摘要

MRI: Develop Inastrumentation to Advance Fundamental Research on Simulating Complex Wind Flow Near the Earth's SurfaceThe boundary layer wind tunnel is an essential research tool for creating dynamic wind flow that replicates the natural behavior of wind near the Earth?s surface. This wind flow is applied to models of buildings and other structures to determine their expected performance and to design them to survive extreme wind events. The accurate replication of natural wind in a laboratory is not trivial. The methods and equipment vary depending upon the wind condition (tornadoes, hurricanes, thunderstorms, etc.), and the geographic location of the object being studied (near the coast, in a suburban community, etc.). Current wind tunnel facilities are limited in this regard, each capable of addressing a small subset of wind phenomena. This award supports the development of an instrument that vastly expands the capability of a single facility to study a wide range of wind conditions observed in nature and assess how they affect the built and natural environments. This capability will accelerate the rate of discovery and open pathways to solving problems in the development of resilient infrastructure. Other applications include the study of pollutant dispersion, siting of wind energy resources, biomechanics, human perception of hazards, and micro aerial vehicle development. The project includes participants from five continents. Thus the development of this instrument will strengthen US competitiveness by enabling a breakthrough in boundary layer wind tunnel technology, while enhancing international collaboration on wind hazard issues that impact the entire populated world.The objective is to develop an instrument capable of simulating nonstationary, non-neutral or transitioning surface flows. Examples include offshore hurricane winds flowing into a terrestrial environment, non-stationary gust fronts in thunderstorms, transient coherent structures induced by the shearing motion aloft and wind-driven rain. The instrument will command static and dynamic control devices that automatically reconfigure to achieve user-specified similarity requirements such as non-monotonic profiles, spatially variable power spectra and integral length scales, transient gusts, and rain entrainment in the flow field. These control devices must work in series (one stage conditions the next) to achieve the intended function of the instrument. The instrument includes components adapted from existing proof-of-concept studies and new technology to be developed. The framework on which the instrument is to be developed is a conventional boundary layer wind tunnel design, as a goal is to create a tool suitable for implementation in facilities worldwide.

MRI：开发侵犯，以推进基础研究，以模拟地球边界边界层风隧道附近的复杂风流是创建动态风流的必不可少的研究工具，该工具可以复制地球表面附近风的自然行为。这种风流应用于建筑物和其他结构的模型，以确定其预期的性能并设计以在极端风事件中生存。实验室中天然风的准确复制并不是微不足道的。方法和设备根据风条件（龙卷风，飓风，雷暴等）以及所研究的物体的地理位置（在海岸，郊区社区等）而有所不同。目前的风洞设施在这方面受到限制，每个设施都能解决一小部分风现象。该奖项支持了一种仪器的开发，该工具大大扩展了单个设施在研究自然界观察到的广泛风条件的能力，并评估它们如何影响建筑和自然环境。这种能力将加速发现弹性基础设施发展问题的发现率和开放途径。其他应用包括研究污染物分散，风能资源的选址，生物力学，人类对危险的看法以及微型航空车辆的发展。该项目包括来自五大洲的参与者。因此，该工具的开发将通过实现边界层风洞技术的突破来增强美国的竞争力，同时增强有关影响整个人口稠密世界的风险危害问题的国际协作。目标是开发能够模拟非平稳，非中性或过渡表面流量的工具。例子包括流入陆地环境的海上飓风，雷暴中的非平稳阵风，由高空剪切运动和风驱动的雨水引起的瞬态相干结构。该仪器将命令静态和动态控制设备，该设备自动重新配置以实现用户指定的相似性要求，例如非单调配置文件，空间可变功率谱和积分长度尺度，瞬态阵风和流场中的雨水夹带。这些控制设备必须以串联（一个阶段条件的一个阶段）来实现仪器的预期功能。该仪器包括根据现有的概念验证研究和要开发的新技术的组件。开发仪器的框架是一种常规的边界层风洞设计，目的是创建适合全球设施实施的工具。