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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.

核磁共振成像：发展仪器，推进近地表复杂风流模拟基础研究边界层风洞是创造动态风流的重要研究工具，可以复制近地风的自然行为？S。这种风流被应用于建筑物和其他结构的模型，以确定它们的预期性能，并设计它们以抵御极端风事件。在实验室中准确复制自然风并不是一件轻而易举的事情。方法和设备取决于风力条件(龙卷风、飓风、雷暴等)和被研究对象的地理位置(靠近海岸、在郊区社区等)。目前的风洞设施在这方面是有限的，每个设施都能够解决风现象的一小部分。该奖项支持开发一种仪器，极大地扩展单一设施的能力，以研究在自然界中观察到的各种风条件，并评估它们如何影响建筑和自然环境。这一能力将加快发现的速度，并为解决弹性基础设施开发中的问题开辟道路。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，以及微型飞行器的开发。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问题上的国际合作。目标是开发一种能够模拟非平稳、非中性或过渡地表流动的仪器。例子包括流入陆地环境的离岸飓风风、雷暴中的非静止阵风锋面、高空切变运动引起的瞬时相干结构和风致降雨。该仪器将控制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，如非单调轮廓、空间可变的功率谱和积分长度尺度、瞬时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，下一个阶段条件)，以实现仪器的预期功能。该文书包括改编自现有概念验证研究的组成部分和有待开发的新技术。该仪器的开发框架是传统的边界层风洞设计，因为目标是创造一种适合在世界各地的设施中实施的工具。