The development of high-speed particle image velocimetry (20�kHz) for large eddy simulation code refinement in bluff body flows

Williams, T. C.; Hargrave, Graham K.; Halliwell, Neil A.

doi:10.1007/s00348-003-0638-5

Cited by 14 publications

(9 citation statements)

References 11 publications

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“…This method produced approximately 4500 velocity vectors in each field excluding the regions covered by the cylinder and its shadow yielding a spatial resolution of E0.1D. Further analysis was performed on 16 Â 16 pixel interrogation windows in order to improve the accuracy of the cross-correlation analysis in regions of very steep velocity gradients (Williams et al, 2003). The velocity fields obtained with 32 Â 32 and 16 Â 16 pixel interrogation windows agreed very well and so were the statistical properties of the flow derived from them.…”

Section: Particle Image Velocimetrymentioning

confidence: 99%

Symmetric vortex shedding in the near wake of a circular cylinder due to streamwise perturbations

Konstantinidis

Balabani

2007

Journal of Fluids and Structures

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Section: Particle Image Velocimetrymentioning

confidence: 99%

Symmetric vortex shedding in the near wake of a circular cylinder due to streamwise perturbations

Konstantinidis

Balabani

2007

Journal of Fluids and Structures

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“…This system was applied to turbulent jet flames at data acquisition rates of 8 kHz. Even higher sampling rates up to 20 kHz were achieved by Williams et al [54] using a drum film camera. The rapid improvements in CMOS camera technology in recent years has meant that analogue film cameras could be replaced by digital ones while still providing kilohertz frame rates and a sufficiently high resolution.…”

Section: Literature Review Of Planar High-speed Plif and Piv In Combumentioning

confidence: 94%

New Perspectives on Turbulent Combustion: Multi-Parameter High-Speed Planar Laser Diagnostics

Böhm

Heeger

Gordon

et al. 2010

Flow Turbulence Combust

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Over the past three decades laser combustion diagnostics have guided an improved understanding of turbulent combustion processes. Until recently, this was based on statistically independent sampling using sampling rates much slower than typical integral time-scales of turbulent flames. Recent developments in laser and camera technology enabled an increase in sampling rates by more than three orders of magnitudes. Using these new instruments for particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF) at high sampling rates (high-speed diagnostics) allowed the resolution of integral time-scales of turbulent flames. This statistically dependent sampling is increasingly used to temporally track transients in turbulent combustion, such as flame extinction, ignition, flashback and cycle-tocycle variations in IC engines. The simultaneous application of flow and scalar field measurements makes insights into these transients possible that were not when using statistically independent sampling with low data acquisition rates. Conditioning on distinct flame features with high-speed diagnostics enables the inclusion of time as an additional dimension. This paper reviews the emerging field of multi-parameter, high-speed, planar laser diagnostics in combustion applications. The benefit of high data acquisition rates in turbulent combustion applications is discussed in detail as well as requirements and constraints imposed by the time-scales of the investigated phenomenon are addressed. Recent developments in laser and detector hardware

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“…The light source in both cases was a copper-vapour laser giving between 1.5 and 6 mJ/pulse. Williams et al [53] have achieved the highest speed (20 kHz) and highest spatial resolution (0.9 mm 2 ) to date in time-resolved PIV. The system uses coppervapour laser illumination and a rotating high-speed drum camera.…”

Section: Cinematic Particle Image Velocimetrymentioning

confidence: 99%

The application of laser measurement techniques to aerospace flows

Lawson

2004

Proceedings of the Institution of Mechanical Engineers, Part G:

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Laser measurement techniques are becoming more commonly applied to many areas of thermo¯uids and heat transfer. An area of their application, which presents highly challenging requirements, is in the measurement of aerospace¯ows. In this case the experimentalist may encounter high mass¯owrates, high-speed¯ows and in some cases high temperatures, and the measurements may also have to be taken with restricted optical access. Such types of¯ow have already been measured using established laser techniques such as particle image velocimetry, laser Doppler anemometry, laser-induced¯uorescence and liquid crystal thermography. Other more recent techniques which have seen application include Doppler global velocimetry and molecular tagging velocimetry for velocity measurement and thermographic phosphor thermometry for surface temperature measurement. This paper reviews the most recent advances in laser techniques and their application to aerospace environments.

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The development of high-speed particle image velocimetry (20�kHz) for large eddy simulation code refinement in bluff body flows

Cited by 14 publications

References 11 publications

Symmetric vortex shedding in the near wake of a circular cylinder due to streamwise perturbations

Symmetric vortex shedding in the near wake of a circular cylinder due to streamwise perturbations

New Perspectives on Turbulent Combustion: Multi-Parameter High-Speed Planar Laser Diagnostics

The application of laser measurement techniques to aerospace flows

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