EAGER: Improving the Aeroacoustic Properties of Hybrid Anechoic Wind Tunnels

EAGER：改善混合消声风洞的气动声学特性

• 批准号: 2012443
• 负责人: William Devenport
• 金额: $ 19.55万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-01-15 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012443&HistoricalAwards=false
• 关键词: EAGER; Improving; Aeroacoustic; Properties; Hybrid

Wind tunnels are a fundamental part of the engineering and scientific process used to develop quieter and more efficient aircraft, wind turbines, and other systems. The hybrid anechoic wind tunnel, introduced some 13 years ago, provides a way to substantially increase the accuracy and scope of wind tunnel tests concerned with flow generated noise. This configuration, which has already been adopted by a number of research facilities across the world relies on “acoustic windows” – large panels of tensioned fabric that are transparent to sound but largely impervious to flow. Such windows have been made from commercially available Kevlar fabric which has many desirable characteristics for this purpose, but the fabric was designed for composites manufacture. A Kevlar fabric explicitly designed for wind tunnel applications promises additional benefits – an even quieter test environment and embedded instrumentation that can monitor the flow. Under this project, an interdisciplinary team of textiles, acoustics, and aerodynamics researchers will conduct a short-term research program to develop these materials. This innovative, potentially high payoff effort, promises to bring the advantages of hybrid anechoic testing to national scale facilities and greatly enhance the development quieter and more efficient vehicles and systems. This project will also be dedicated to research education at the postdoc, graduate and undergraduate levels. This research is based upon the observation that Kevlar fabric used as acoustic windows generates noise at high frequencies (10kHz) that potentially limits the application of this technology in the context of national scale wind tunnel facilities that perform applied model scale testing for vehicle development by industry and government. The hypothesis is that the noise is made by pores in the fabric that serve no useful aeroacoustic function. Adjusting the weave to eliminate the pores requires the multi-disciplinary collaboration needed to perform a systematic study of the optimum fabric design for aeroacoustic applications. The work is being performed by a team of researchers from Virginia Tech, Florida Atlantic University, and NC State. The NC State group will use a research loom fabricate the needed modified fabrics and also investigate the feasibility of embedding sensors. Wind tunnel experiments directed at documenting and understanding the aeroacoustic performance of the fabrics will be performed at Virginia Tech, which will also provide input on sensor choices and requirements. Theoretical modeling and understanding of the nature of the acoustic source will be performed at Florida Atlantic University. Together this effort is expected to generate robust recommendations for optimal acoustic window design and embedded sensors that can be adopted by current and planned hybrid anechoic wind tunnels.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

风隧道是英语E </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s> </s>在大约13年前引入的杂种式风隧道提供了一种实质性的方法，并范围示波器范围示波器示波器范围范围世界已经依赖于“声窗户” - 大量的张力织物透明，但对流动的范围很大可以监测流动的纺织品，声学和空气动力学研究人员将进行短期RCH计划，以开发这些创新的，潜在的薪水，将有望将混合式测试的优势带入国家杂种测试，并将其嵌入。设施和更大的发展，更多的ehicles和系统。在纳塔尔量表的技术中，威尔特级的技术技术在执行型号的型号测试是通过行业和政府进行的。为了获得最佳的织物设计，佛罗里达州大西洋大学和北卡罗来纳州立大学的最佳织物设计。在佛罗里达大西洋大学提供输入的选择和要求。 。

项目成果

Investigating the Aeroacoustic Properties of Porous Fabrics

研究多孔织物的气动声学特性

• DOI: 10.2514/1.j061385
• 发表时间: 2022
• 期刊: AIAA Journal
• 影响因子: 2.5
• 作者: Szőke, Máté;Devenport, William J.;Borgoltz, Aurélien;Alexander, W. Nathan;Hari, Nandita;Glegg, Stewart A.;Li, Ang;Vallabh, Rahul;Seyam, Abdel-Fattah M.
• 通讯作者: Seyam, Abdel-Fattah M.