CAJ | 학술논문

层析粒子图像测速（Tomo-PIV）是一种先进的光学测量技术，能够定量获取三维体视流场结构，可作为诸如湍流、多涡系干扰等三维复杂流场的有效测量手段。为了实现该技术在风洞模型测量中的应用，研究了工程应用和数据处理方法。在中航工业气动院 FL-5风洞，选取12mm 直径的圆柱体作为试验模型，应用 Tomo-PIV 技术测量了圆柱三维尾流场，通过解决体光源引入、示踪粒子投放和现场标定等关键技术以及对数据处理方法的研究，成功获得了圆柱体后方典型的三维卡门涡流场。测量区域约95mm×70mm×8．5mm，粒子图像分辨率达到20 pixels／mm，包含数万个速度矢量数据，实现了 Tomo-PIV 的风洞试验验证。
층석입자도상측속（Tomo-PIV）시일충선진적광학측량기술，능구정량획취삼유체시류장결구，가작위제여단류、다와계간우등삼유복잡류장적유효측량수단。위료실현해기술재풍동모형측량중적응용，연구료공정응용화수거처리방법。재중항공업기동원 FL-5풍동，선취12mm 직경적원주체작위시험모형，응용 Tomo-PIV 기술측량료원주삼유미류장，통과해결체광원인입、시종입자투방화현장표정등관건기술이급대수거처리방법적연구，성공획득료원주체후방전형적삼유잡문와류장。측량구역약95mm×70mm×8．5mm，입자도상분변솔체도20 pixels／mm，포함수만개속도시량수거，실현료 Tomo-PIV 적풍동시험험증。
Tomographic particle image velocimetry (Tomo-PIV)is an advanced optical meas-urement technology,which can acquire three-dimensional three-components (3D3C)flow field structure quantitatively in a complete volume,and can be used as an effective method on turbu-lence,vortex interference and other complex three-dimensional flow field measurement.In order to achieve the measurement application of Tomo-PIV in the FL-5 wind tunnel with 1.5m diame-ter test section of AVIC Aerodynamics Research Institute,the wake of a cylinder with 12mm di-ameter is investigated by means of Tomo-PIV.The flow speed is 15m/s,the measurement vol-ume is illuminated by a 2 ×200 mJ laser,and four 2048 ×2048 pixels CCD cameras with 85mm lens are used to record particles images from different directions.By solving a series of engineer-ing problems,such as diffusion of particles and optical path design,we successfully obtained the Karman rollers flow structure of the cylinder’s wake.Then,we studied the method of the data processing.The measurement volume extends approximately over a region of 95mm×70mm× 8.5mm with the shortest side in the direction of the depth of field,and the particle image spatial resolution is about 20 pixels/mm.There are tens of thousands of vectors recorded at every snap-shot.We can obtain a lot of information about the flow field by Tomo-PIV,much more than that obtained by 2D PIV or stereo-PIV measurement.