PIV/PLIF investigation of two-phase vortex–flame interactions: effects of vortex size and strength

Lemaire, A.; Meyer, Terrence R.; Zähringer, Katharina; Gord, James R.; Rolon, Juan-Carlos

doi:10.1007/s00348-003-0608-y

Cited by 14 publications

(6 citation statements)

References 22 publications

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“…A few ms prior to extinction, multiple vortices acting coherently generate strain over extended regions near the flame. According to Lemaire et al [10] peak strain was identified to be a significant controlling parameter. However, in Katta et al [13], based on numerical simulations, unsteady flames were observed to resist strain twice the extinction level of laminar flames.…”

Section: Resultsmentioning

confidence: 99%

“…One way to circumvent these experimental issues in turbulent flame measurements is to generate ''controlled unsteadiness" to allow for phase-locked measurements. The opposed jet configuration, where individual vortices have been generated traveling through the reaction zone, is a prominent example of such investigations [10][11][12]. Given the simplicity of the flow field even direct numerical simulations (DNS) of these flames are possible [13].…”

Section: Introductionmentioning

confidence: 99%

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Time-resolved conditional flow field statistics in extinguishing turbulent opposed jet flames using simultaneous highspeed PIV/OH-PLIF

Böhm

Heeger

Boxx

et al. 2009

Proceedings of the Combustion Institute

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Time-resolved particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF), both at 5 kHz, were applied simultaneously on extinguishing turbulent opposed jet flames. This repetition rate allowed tracking of transient extinction events in turbulent combustion. The additional information acquired about time history enabled a study of the evolution of vortex-flame interactions leading to extinction from individual events. A newly introduced multidimensional conditioning technique to avoid spatialand temporal-smearing of important flow field information was developed in order to compare individual extinction events in a meaningful, statistical manner. The conditional statistics show that vortices tend to align around the flame and generate regions of high strain in the region where the flame is about to extinguish.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Time-resolved conditional flow field statistics in extinguishing turbulent opposed jet flames using simultaneous highspeed PIV/OH-PLIF

Böhm

Heeger

Boxx

et al. 2009

Proceedings of the Combustion Institute

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show abstract

“…Rather, high vorticity is related to the shear across the reaction zone. As the results of Lemaire et al [11], they had studied the effect of vortex size in the context of flame surface area evolution and flame extinction. The flame experiences rapid extinction for vortices of high velocity and strength due to the increased normal strain rate.…”

Section: Article In Pressmentioning

confidence: 98%

Performance and analysis by particle image velocimetry (PIV) of cooker-top burners in Thailand

Makmool¹,

Jugjai²,

Tia³

et al. 2007

Energy

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“…Therefore, previous studies on extinction were performed on simplified generic flames. Lemaire et al [67], for example, studied extinction in laminar opposed jet flames perturbed by artificially generated vortices. Data were sampled with fixed time intervals based on the vortex generation, resulting in phase-resolved statistics.…”

Section: Flame Extinction In Turbulent Opposed Jet Flamesmentioning

confidence: 99%

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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PIV/PLIF investigation of two-phase vortex–flame interactions: effects of vortex size and strength

Cited by 14 publications

References 22 publications

Time-resolved conditional flow field statistics in extinguishing turbulent opposed jet flames using simultaneous highspeed PIV/OH-PLIF

Time-resolved conditional flow field statistics in extinguishing turbulent opposed jet flames using simultaneous highspeed PIV/OH-PLIF

Performance and analysis by particle image velocimetry (PIV) of cooker-top burners in Thailand

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

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