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：开发仪器以推进模拟地球表面附近复杂风流的基础研究边界层风洞是创建动态风流的重要研究工具，可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，以确定其预期性能并设计它们以承受极端风事件。在实验室中准确复制自然风并非易事。方法和设备根据风况（龙卷风、飓风、雷暴等）和所研究对象的地理位置（靠近海岸、郊区社区等）而有所不同。目前的风洞设施在这方面是有限的，每个设施都只能解决一小部分风现象。该奖项支持开发一种仪器，该仪器极大地扩展了单个设施的能力，以研究自然界中观察到的各种风况并评估它们如何影响建筑和自然环境。这种能力将加快发现速度并开辟解决弹性基础设施开发中问题的途径。其他应用包括污染物扩散研究、风能资源选址、生物力学、人类对危险的感知以及微型飞行器开发。该项目包括来自五大洲的参与者。因此，该仪器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，同时加强在影响整个人口世界的风灾害问题上的国际合作。目标是开发一种能够模拟非平稳、非稳态的仪器。中性或过渡表面流。例子包括流入陆地环境的近海飓风、雷暴中的非静止阵风、高空剪切运动引起的瞬态相干结构和风驱动的降雨。该仪器将命令静态和动态控制设备自动重新配置，以实现用户指定的相似性要求，例如非单调剖面、空间可变功率谱和积分长度尺度、瞬态阵风和流场中的降雨夹带。这些控制装置必须串联工作（一个阶段条件下一个阶段）才能实现仪器的预期功能。该仪器包括改编自现有概念验证研究和待开发新技术的组件。开发该仪器的框架是传统的边界层风洞设计，目标是创建适合在全球设施中实施的工具。