Simultaneous 10 kHz TPIV, OH PLIF, and CH2O PLIF measurements of turbulent flame structure and dynamics

Osborne, Jeffrey R.; Ramji, Sarah Ann; Carter, Campbell D.; Peltier, Scott; Hammack, Stephen D.; Lee, Tonghun; Steinberg, Adam M.

doi:10.1007/s00348-016-2151-7

Cited by 56 publications

(10 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies in the past have explored the characteristics of local flame-flame interactions and how they impact the behavior of the flame [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Two broad categories of local flame-flame interactions have been found to occur in turbulent premixed flames: normal interactions and counter-normal interactions [22,23].…”

Section: Dnsmentioning

confidence: 99%

Statistics and topology of local flame–flame interactions in turbulent flames

Tyagi

Boxx

Peluso

et al. 2019

Combustion and Flame

View full text Add to dashboard Cite

Flame-flame interaction events occur frequently in turbulent premixed flames and change the local structure and dynamics of flames. It is essential to understand these flame-flame interaction events to develop high-fidelity combustion models for use in modern combustion devices. In this study, we experimentally investigate the topology of flame-flame interaction events in single-and multi-flame configurations. A dual-burner experiment is probed with highspeed OH-planar laser-induced fluorescence and stereoscopic-particle image velocimetry to obtain simultaneous flame front locations and velocity fields. A non-rigid image registration technique is implemented to track the topological changes occurring in these flames. In both single-and dualflame configurations, small-scale interactions occur more frequently compared to large-scale interactions, and statistics show that most of the reactant-side interactions contribute to large flame surface destructions than the product-side interactions. It is also found that turbulence length-and velocity-scales can play an important role in facilitating the interaction events and pocket formations from these events. Filamentarity is used to quantify the two-dimensional shape of these interactions and comparisons are made between the orientation and shape of interaction events and the local turbulence in the flowfield. Alignment between the orientation of the interaction shapes and the principal strain rates show that compressive fluid forces drive both types of interaction events. Δ Angle difference between and ℱ Filamentarity ℛ Reactant-side interaction rates ℛ Pocket formations from reactant-side interactions ℛ Product-side interaction rates ℛ Pocket formations from product-side interactions

show abstract

Section: Dnsmentioning

confidence: 99%

Statistics and topology of local flame–flame interactions in turbulent flames

Tyagi

Boxx

Peluso

et al. 2019

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…2011; Coriton, Steinberg & Frank 2014; Osborne et al. 2016, 2017; Wabel, Skiba & Driscoll 2017 a ; Wabel et al. 2017 b ).…”

Section: Data Processing and Uncertaintymentioning

confidence: 99%

Enstrophy transport in swirl combustion

2019

Self Cite

View full text Add to dashboard Cite

The contributions of vortex stretching, dilatation, baroclinic torque and viscous diffusion to Reynolds-averaged enstrophy transport in turbulent swirl flames were experimentally measured using tomographic particle image velocimetry and $\text{CH}_{2}\text{O}$ planar laser induced fluorescence at jet Reynolds numbers of 26 000–51 000. The mean baroclinic torque was determined by subtracting the other terms in the enstrophy transport equation from the mean Lagrangian derivative. Enstrophy production from baroclinic torque was found to be significant relative to the other transport terms across all conditions studies. This result contrasts with direct numerical simulations of flames in homogeneous isotropic turbulence, which show a decreasing relative significance of baroclinic torque with increasing turbulence intensity (e.g. Bobbitt, Lapointe & Blanquart, Phys. Fluids, vol. 28 (1), 2016, 015101). Hence, the significance of baroclinic enstrophy production in flames is not determined entirely by the local turbulence and flame properties, but also depends on the configuration-specific pressure field.

show abstract

“…Petersson et al 27,221 simultaneously measured flow velocity and OH distribution of a turbulent low-swirl flame using combined PIV and PLIF techniques, indicating both the reaction zone structure of the low-swirl flame and the flow velocity around the flame. Osborne et al 222 carried out simultaneous tomographic PIV, OH PLIF, and CH 2 O PLIF measurements at 10 kHz in a turbulent flame. With the use of the complex system, the flame structure and dynamics from the corrugated flamelet regime to broadened/broken flamelet were observed, along with velocity vectors in a volumetric space.…”

Section: Particle Imaging Velocimetrymentioning

confidence: 99%

“…Osborne et al. 222 carried out simultaneous tomographic PIV, OH PLIF, and CH 2 O PLIF measurements at 10 kHz in a turbulent flame. With the use of the complex system, the flame structure and dynamics from the corrugated flamelet regime to broadened/broken flamelet were observed, along with velocity vectors in a volumetric space.…”

Section: Flow-field Diagnosticsmentioning

confidence: 99%

Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

Ehn

Zhu

et al. 2017

Appl Spectrosc

View full text Add to dashboard Cite

Gaining information of species, temperature, and velocity distributions in turbulent combustion and high-speed reactive flows is challenging, particularly for conducting measurements without influencing the experimental object itself. The use of optical and spectroscopic techniques, and in particular laser-based diagnostics, has shown outstanding abilities for performing non-intrusive in situ diagnostics. The development of instrumentation, such as robust lasers with high pulse energy, ultra-short pulse duration, and high repetition rate along with digitized cameras exhibiting high sensitivity, large dynamic range, and frame rates on the order of MHz, has opened up for temporally and spatially resolved volumetric measurements of extreme dynamics and complexities. The aim of this article is to present selected important laser-based techniques for gas-phase diagnostics focusing on their applications in combustion and aerospace engineering. Applicable laser-based techniques for investigations of turbulent flows and combustion such as planar laser-induced fluorescence, Raman and Rayleigh scattering, coherent anti-Stokes Raman scattering, laser-induced grating scattering, particle image velocimetry, laser Doppler anemometry, and tomographic imaging are reviewed and described with some background physics. In addition, demands on instrumentation are further discussed to give insight in the possibilities that are offered by laser flow diagnostics.

show abstract

Simultaneous 10 kHz TPIV, OH PLIF, and CH2O PLIF measurements of turbulent flame structure and dynamics

Cited by 56 publications

References 51 publications

Statistics and topology of local flame–flame interactions in turbulent flames

Statistics and topology of local flame–flame interactions in turbulent flames

Enstrophy transport in swirl combustion

Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

Contact Info

Product

Resources

About