Multi-window PIV for high-lift measurements

Arnott, A.; Schneider, G.; Neitzke, Klaus-Peter; Agocs, Janos; Sammler, B.; Schröder, Andreas; Kompenhans, Jürgen

doi:10.1109/iciasf.2003.1274851

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Flow measurement is applied in many applications, such as blood flow analysis [1], wind tunnel experiments in automobile or aircraft design [2], multi-phase flow in engine firebox, and analysis of underwater flow, and so on. Particle image velocimetry (PIV) is a promising flow measurement technique, which combines computer vision, image processing and laser technology [3][4][5]. PIV can be used to obtain instantaneous information over the entire field of view while leaving the fluid flow undisturbed.…”

Section: Introductionmentioning

confidence: 99%

Front Design and Exploitation of PIV System

Meng

2012

2012 International Conference on Communication Systems and Network Technologies

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In this paper, the data acquisition system of PIV (Particle image velocimetry) system is investigated. Taken FPGA (Field programmable gate array) as the main controller, the acquisition, processing and transmission of particle images is completed, and communications between the designed system and computers are obtained. The interfaces between the system and CCD cameras follow the protocol of Camera Link, which controls CCD cameras, makes a signal transformation from LVDS to TTL, and accomplishes the serial communication between cameras and the system. The interfaces between the system and computer are based on networks, which solves the problem of distance control of the system. These functions were validated by experiments, in which the acquisition of images in PIV system is completed.

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Section: Introductionmentioning

confidence: 99%

Front Design and Exploitation of PIV System

Meng

2012

2012 International Conference on Communication Systems and Network Technologies

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“…The particle image velocimetry (PIV) [1] technology is a very powerful flow measurement technique which was developed in the 1980s [2]. Compared with conventional methods as LDV, PIV has the advantage of capturing the full-field information instantaneously and noninvasively with high resolution and accuracy, and meanwhile it's convenient to easily extract other physical quantities (such as vorticity field, strain field etc.)…”

Section: Introductionmentioning

confidence: 99%

An Improved Particle Image Velocimetry Algorithm for Velocity Measurement of Oil-Water Two-Phase Flow

Kong

et al. 2014

AMM

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In this paper, an improved PIV algorithm is proposed for the velocity field of oil-water two-phase dispersed flow in horizontal pipe. In the proposed PIV algorithm, interrogation windows are overlapped by 50% in all iterations other than just overlapped in the final iteration. And what’s still different is that the interrogation window can also be a rectangular window just as [64 64; 64 64; 32 32; 32 32; 32 16;]. What’s more, if any element of the final interrogation window is different from the penultimate iteration, there is going to be another interrogation with the last interrogation window size, which can reduce the false vectors. Experimental results show that velocity measurements of oil-water two-phase flow can be realized by this advanced PIV algorithm with high accuracy. At the same time, it provides the basis for further studying the application of PIV in velocity measurements of oil-water two-phase flow.

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“…Various approaches have been taken to reduce the effects of flare. Matt black surface preparations can be beneficial for a short period [9]. However, with pulsed illumination the surface layer can rapidly become ablated.…”

Section: Introductionmentioning

confidence: 99%

Optimization and evaluation of fluorescent tracers for flare removal in gas-phase particle image velocimetry

Chennaoui

Angarita-Jaimes

Ormsby

et al. 2008

Meas. Sci. Technol.

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We report the development of optimized fluorescent dye-doped tracer particles for gas-phase particle image velocimetry (PIV) and their use to eliminate ‘flare’ from the images obtained. In such applications, micron-sized tracer particles are normally required to accurately follow the flow. However, as the tracer size is reduced the amount of light incident on the particle diminishes and consequently the intensity of emitted light (fluorescence). Hence, there is a requirement to identify dyes with high quantum yield that can be dissolved in conventional tracer media at high concentrations. We describe the selection and characterization of a highly fluorescent blue-emitting dye, Bis-MSB, using a novel method, employing stabilized micro-emulsions, to emulate the fluorescence properties of tracer particles. We present the results of PIV experiments, using 1 µm tracer particles of o-xylene doped with Bis-MSB, in which elastically scattered ‘flare’ has been successfully removed from the images using an appropriate optical filter.

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Multi-window PIV for high-lift measurements

Cited by 6 publications

References 7 publications

Front Design and Exploitation of PIV System

Front Design and Exploitation of PIV System

An Improved Particle Image Velocimetry Algorithm for Velocity Measurement of Oil-Water Two-Phase Flow

Optimization and evaluation of fluorescent tracers for flare removal in gas-phase particle image velocimetry

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