权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Luminescence-based Pressure and Strain Measurement for High-speed Fluid-structure Interactions

基于发光的高速流固耦合压力和应变测量

基本信息

批准号：
1802994
负责人：
James Hubner
金额：
$ 35.87万
依托单位：
University of Alabama Tuscaloosa
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2022-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1802994&HistoricalAwards=false
关键词：
Luminescence based Pressure Strain Measurement

项目摘要

The air flow over high-speed aircraft and rockets, particularly at supersonic speeds, can cause structural vibrations that may be detrimental to either the performance or the safety of the vehicle. These vibrations arise from large pressure fluctuations developing from the flow near the surface as well as from shock waves impinging the surface. The experimental determination of the location, magnitude and frequency of the pressure loads and their effect on the structural response are important to validate both theoretical and computational fluid-structure interaction models. This project will study and develop a novel approach to measure the combined surface pressure and strain using a fast-responding luminescent coating and high-speed digital cameras. The use of luminescence techniques in the science, engineering, and medical fields has seen substantial growth in recent years. The research will offer a robust learning environment to expose, energize, and recruit both undergraduate and graduate students. The goal of the proposed effort is to integrate two luminescent-based optical sensors?pressure sensitive paint and luminescent photoelastic coating?to measure the unsteady, distributed loads and strains on thin or deformable structures in high-speed flow. A successful effort will lead to a new tool for researchers and engineers to study fluid structure interactions in supersonic and eventually hypersonic flow where experimental data is often sparse. The approach is to exploit commonalities of the two measurement techniques. The average and the variance of luminescent emission intensity relative to camera polarization angle of the proposed binary pressure-strain coating are sensitive to surface pressure and strain, respectively. The advent of high-powered light-emitting diodes and digital cameras with micropolarizer lenses has enabled the possibility for this simultaneous full-field, time-dependent approach. The three year proposed effort would first characterize and demonstrate the approach in a controlled benchtop environment in year one, then expand to more challenging flow environments in on-campus supersonic flow facilities in year two and finally graduate to a demonstration at Sandia National Laboratories during the final year.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.

高速飞行器和火箭上的气流，特别是超音速飞行器和火箭上的气流，会引起结构振动，这可能对飞行器的性能或安全性有害。这些振动是由表面附近的流动以及冲击表面的冲击波产生的大的压力波动引起的。压力载荷的位置、大小和频率的实验确定及其对结构响应的影响对于验证理论和计算流体-结构相互作用模型都很重要。本项目将研究和开发一种新的方法，使用快速响应的发光涂层和高速数码相机来测量表面压力和应变的组合。近年来，发光技术在科学、工程和医学领域的应用已经有了实质性的增长。这项研究将提供一个强大的学习环境，以暴露，激励和招募本科生和研究生。拟议的努力的目标是整合两个基于发光的光学传感器？压敏涂料和发光光弹性涂料？测量高速水流中薄结构或可变形结构上的非定常分布载荷和应变。一项成功的努力将为研究人员和工程师提供一种新的工具，用于研究超音速和最终高超音速流中的流体结构相互作用，因为实验数据通常很少。该方法是利用这两种测量技术的共性。所提出的二元压力-应变涂层的发光强度相对于相机偏振角的平均值和方差分别对表面压力和应变敏感。高功率发光二极管和带有微偏振透镜的数码相机的出现使得这种同时全场、随时间变化的方法成为可能。这项为期三年的拟议工作将首先在第一年在受控的台式环境中描述和演示该方法，然后扩展到更具挑战性的流动环境，该奖项反映了NSF的法定使命，并通过使用基金会的知识产权进行评估，被认为值得支持。优点和更广泛的影响审查标准。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Full-Field Pressure and Strain Measurement Technique Using a Dual-Layer Luminescent Coating

DOI：
10.2514/1.j060058
发表时间：
2020-12
期刊：
AIAA Journal
影响因子：
2.5
作者：
J. Hubner;Amruthkiran Hegde;Kyle B. Chism;Semih M. Ölçmen;J. Crafton
通讯作者：
J. Hubner;Amruthkiran Hegde;Kyle B. Chism;Semih M. Ölçmen;J. Crafton

Pressure and Strain Measurement on an Inclined Flap in Supersonic Flow using a Dual-Layer Luminescent Coating

DOI：
10.2514/6.2020-2969
发表时间：
2020-06
期刊：
Experimental Mechanics
影响因子：
2.4
作者：
Amruthkiran Hegde;G. Sellers;Semih M. Ölçmen;J. Hubner
通讯作者：
Amruthkiran Hegde;G. Sellers;Semih M. Ölçmen;J. Hubner

Pressure and Strain Measurement on a 10° Control Surface of a Slender Cone in Hypersonic Flow

高超声速流中细锥体10°控制面的压力和应变测量

DOI：
10.2514/6.2022-4043
发表时间：
2022
期刊：
AIAA AVIATION Forum
影响因子：
0
作者：
Hegde, Amruthkiran;MacIntyre, Zach;Hubner, James P.;Chen, Mingtai;Pandey, Anshuman;Flood, John T.;Casper, Katya M.
通讯作者：
Casper, Katya M.

Pressure and Strain Measurement on a Thin Clamped Plate in Supersonic Flow using a Dual-Layer Luminescent Coating

使用双层发光涂层在超音速流中测量薄夹板的压力和应变

DOI：
10.2514/6.2021-2920
发表时间：
2021
期刊：
AIAA AVIATION 2021 Forum
影响因子：
0
作者：
Hegde, Amruthkiran;Chen, Mingtai;Olcmen, Semih;Hubner, James P.;Crafton, Jim;Ryan, Colleen
通讯作者：
Ryan, Colleen

Luminescent Measurement Technique for Analysis of Dynamic Pressure and Strain Fields