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

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

doi:10.1007/s00348-016-2151-7

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

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

Research output: Contribution to journal › Article › peer-review

Abstract

Simultaneous 10 kHz repetition-rate tomographic particle image velocimetry, hydroxyl planar laser-induced fluorescence (OH PLIF), and formaldehyde (CH (Formula presented.) O) PLIF were used to study the structure and dynamics of turbulent premixed flames. The flames investigated span from the classically defined corrugated flamelet regime to conditions at which broadened and/or broken flamelets are expected. Methods are presented for determining 3D flame topologies from the Mie scattering tomography and for tracking features through space and time using theoretical Lagrangian particles. Substantial broadening of the CH (Formula presented.) O region is observed with increasing turbulence intensity. However, OH production remains rapid, and the region of OH and CH (Formula presented.) O overlap remains thin. Local flame speeds exceeding three times the laminar flame speed are observed in regions of flame–flame interaction. Furthermore, a method of tracking fluid residence time within the CH (Formula presented.) O layer is presented and shows that residence time decreases at higher turbulence intensity despite the broader distribution of the CH (Formula presented.) O, indicating an increase in local reaction rate.

Original language	English (US)
Article number	65
Journal	Experiments in Fluids
Volume	57
Issue number	5
DOIs	https://doi.org/10.1007/s00348-016-2151-7
State	Published - May 1 2016

ASJC Scopus subject areas

Computational Mechanics
Mechanics of Materials
Physics and Astronomy(all)
Fluid Flow and Transfer Processes

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@article{392694ef9f634fdcaa73cf35ccd8aeb9,

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

abstract = "Simultaneous 10 kHz repetition-rate tomographic particle image velocimetry, hydroxyl planar laser-induced fluorescence (OH PLIF), and formaldehyde (CH (Formula presented.) O) PLIF were used to study the structure and dynamics of turbulent premixed flames. The flames investigated span from the classically defined corrugated flamelet regime to conditions at which broadened and/or broken flamelets are expected. Methods are presented for determining 3D flame topologies from the Mie scattering tomography and for tracking features through space and time using theoretical Lagrangian particles. Substantial broadening of the CH (Formula presented.) O region is observed with increasing turbulence intensity. However, OH production remains rapid, and the region of OH and CH (Formula presented.) O overlap remains thin. Local flame speeds exceeding three times the laminar flame speed are observed in regions of flame–flame interaction. Furthermore, a method of tracking fluid residence time within the CH (Formula presented.) O layer is presented and shows that residence time decreases at higher turbulence intensity despite the broader distribution of the CH (Formula presented.) O, indicating an increase in local reaction rate.",

author = "Osborne, {Jeffrey R.} and Ramji, {Sarah A.} and Carter, {Campbell D.} and Scott Peltier and Stephen Hammack and Tonghun Lee and Steinberg, {Adam M.}",

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doi = "10.1007/s00348-016-2151-7",

language = "English (US)",

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T1 - Simultaneous 10 kHz TPIV, OH PLIF, and CH2O PLIF measurements of turbulent flame structure and dynamics

AU - Osborne, Jeffrey R.

AU - Ramji, Sarah A.

AU - Carter, Campbell D.

AU - Peltier, Scott

AU - Hammack, Stephen

AU - Lee, Tonghun

AU - Steinberg, Adam M.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Simultaneous 10 kHz repetition-rate tomographic particle image velocimetry, hydroxyl planar laser-induced fluorescence (OH PLIF), and formaldehyde (CH (Formula presented.) O) PLIF were used to study the structure and dynamics of turbulent premixed flames. The flames investigated span from the classically defined corrugated flamelet regime to conditions at which broadened and/or broken flamelets are expected. Methods are presented for determining 3D flame topologies from the Mie scattering tomography and for tracking features through space and time using theoretical Lagrangian particles. Substantial broadening of the CH (Formula presented.) O region is observed with increasing turbulence intensity. However, OH production remains rapid, and the region of OH and CH (Formula presented.) O overlap remains thin. Local flame speeds exceeding three times the laminar flame speed are observed in regions of flame–flame interaction. Furthermore, a method of tracking fluid residence time within the CH (Formula presented.) O layer is presented and shows that residence time decreases at higher turbulence intensity despite the broader distribution of the CH (Formula presented.) O, indicating an increase in local reaction rate.

AB - Simultaneous 10 kHz repetition-rate tomographic particle image velocimetry, hydroxyl planar laser-induced fluorescence (OH PLIF), and formaldehyde (CH (Formula presented.) O) PLIF were used to study the structure and dynamics of turbulent premixed flames. The flames investigated span from the classically defined corrugated flamelet regime to conditions at which broadened and/or broken flamelets are expected. Methods are presented for determining 3D flame topologies from the Mie scattering tomography and for tracking features through space and time using theoretical Lagrangian particles. Substantial broadening of the CH (Formula presented.) O region is observed with increasing turbulence intensity. However, OH production remains rapid, and the region of OH and CH (Formula presented.) O overlap remains thin. Local flame speeds exceeding three times the laminar flame speed are observed in regions of flame–flame interaction. Furthermore, a method of tracking fluid residence time within the CH (Formula presented.) O layer is presented and shows that residence time decreases at higher turbulence intensity despite the broader distribution of the CH (Formula presented.) O, indicating an increase in local reaction rate.

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