Application of particle image velocimetry to combusting flows: design considerations and uncertainty assessment

Stella, Andrea; Guj, G.; Kompenhans, Jürgen; Raffel, Markus; Richard, Hugues

doi:10.1007/s003480000151

Cited by 62 publications

(28 citation statements)

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“…The topic of PIV (a) [32]. They showed that the inaccuracy from laser sheet deflection and image deformation resulting from refractive index variation are quite small for laboratory-size flames.…”

Section: Piv Processingmentioning

confidence: 99%

Flow Structure of Swirling Turbulent Propane Flames

Алексеенко

Дулин

Kozorezov

et al. 2011

Flow Turbulence Combust

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Flow structure of premixed propane-air swirling jet flames at various combustion regimes was studied experimentally by stereo PIV, CH* chemiluminescence imaging, and pressure probe. For the non-swirling conditions, a nonlinear feedback mechanism of the flame front interaction with ring-like vortices, developing in the jet shear layer, was found to play important role in the stabilisation of the premixed lifted flame. For the studied swirl rates (S = 0.41, 0.7, and 1.0) the determined domain of stable combustion can be divided into three main groups of flame types: attached flames, quasi-tubular flames, and lifted flames. These regimes were studied in details for the case of S = 1.0, and the difference in the flow structure of the vortex breakdown is described. For the quasi-tubular flames an increase of flow precessing above the recirculation zone was observed when increased the stoichiometric coefficient from 0.7 to 1.4. This precessing motion was supposed to be responsible for the observed increase of acoustic noise generation and could drive the transition from the quasi-tubular to the lifted flame regime.

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Section: Piv Processingmentioning

confidence: 99%

Flow Structure of Swirling Turbulent Propane Flames

Алексеенко

Дулин

Kozorezov

et al. 2011

Flow Turbulence Combust

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“…This approach is particularly suitable to highly transient turbulent¯ows such as found in internal combustion engines. Finally, in work by Stella et al [99], many of the causes of error when measuring combusting¯ows with PIV have been analysed. Signi®cant sources of uncertainty included turbulence, high density and temperature gradients and variations in refractive index.…”

Section: Other Processing Methodsmentioning

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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“…Furthermore, spatiotemporal variations of the refractive index field occur, which causes measurement errors for PIV and DGV. The effect is qualitatively described for PIV regarding flame flow measurements by Stella et al [192] and also quantitatively characterized regarding the shock wave in a shear layer and the different air density at an expansion fan by Elsinga et al [193].…”

Section: Application Examples Challenges and Perspectivesmentioning

confidence: 97%

Imaging Flow Velocimetry with Laser Mie Scattering

Fischer

2017

Applied Sciences

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Abstract:Imaging flow velocity measurements are essential for the investigation of unsteady complex flow phenomena, e.g., in turbomachines, injectors and combustors. The direct optical measurement on fluid molecules is possible with laser Rayleigh scattering and the Doppler effect. However, the small scattering cross-section results in a low signal to noise ratio, which hinders time-resolved measurements of the flow field. For this reason, the signal to noise ratio is increased by using laser Mie scattering on micrometer-sized particles that follow the flow with negligible slip. Finally, the ongoing development of powerful lasers and fast, sensitive cameras has boosted the performance of several imaging methods for flow velocimetry. The article describes the different flow measurement principles, as well as the fundamental physical measurement limits. Furthermore, the evolution to an imaging technique is outlined for each measurement principle by reviewing recent advances and applications. As a result, the progress, the challenges and the perspectives for high-speed imaging flow velocimetry are considered.

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Application of particle image velocimetry to combusting flows: design considerations and uncertainty assessment

Cited by 62 publications

References 0 publications

Flow Structure of Swirling Turbulent Propane Flames

Flow Structure of Swirling Turbulent Propane Flames

The application of laser measurement techniques to aerospace flows

Imaging Flow Velocimetry with Laser Mie Scattering

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