Hydroxyl time-scale measurements in turbulent counter-flow flames

K. Venkatesan; G. B. King; N. M. Laurendeau; M. W. Renfro; S. K. Omar; A. Ludwig; D. Geyer; A. Dreizler; J. Janicka

Hydroxyl time-scale measurements in turbulent counter-flow flames

K. Venkatesan, G. B. King, N. M. Laurendeau, M. W. Renfro, S. K. Omar, A. Ludwig, D. Geyer, A. Dreizler, J. Janicka

Research output: Contribution to conference › Paper › peer-review

Abstract

Time-series measurements of OH concentrations were obtained for a set of turbulent counter-flow nonpremixed H₂/CH₄/air flames. The normalized PSD collapsed at lower frequencies, which dominated the integral time scale, but displayed residual variations at higher frequencies. The near complete collapse of the two-time statistics indicated that the integral time scale is a good representation of hydroxyl fluctuations in these counter-flow nonpremixed flames. The integral time scale depended on the combined Re and strain rate (SR) approximately as Re-L35 in counter-flow nonpremixed flames. Time-series measurements of OH concentrations were also obtained for a set of turbulent counter-flow partially premixed CH₄/air flames. The effect of variations in Reynolds number and equivalence ratio on the fluctuation statistics was studied. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).

Original language	English
Pages	449
Number of pages	1
State	Published - 2004
Event	30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations - Chicago, IL, United States Duration: Jul 25 2004 → Jul 30 2004

Conference

Conference	30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations
Country/Territory	United States
City	Chicago, IL
Period	7/25/04 → 7/30/04

ASJC Scopus subject areas

General Engineering

Cite this

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title = "Hydroxyl time-scale measurements in turbulent counter-flow flames",

abstract = "Time-series measurements of OH concentrations were obtained for a set of turbulent counter-flow nonpremixed H2/CH4/air flames. The normalized PSD collapsed at lower frequencies, which dominated the integral time scale, but displayed residual variations at higher frequencies. The near complete collapse of the two-time statistics indicated that the integral time scale is a good representation of hydroxyl fluctuations in these counter-flow nonpremixed flames. The integral time scale depended on the combined Re and strain rate (SR) approximately as Re-L35 in counter-flow nonpremixed flames. Time-series measurements of OH concentrations were also obtained for a set of turbulent counter-flow partially premixed CH4/air flames. The effect of variations in Reynolds number and equivalence ratio on the fluctuation statistics was studied. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).",

author = "K. Venkatesan and King, {G. B.} and Laurendeau, {N. M.} and Renfro, {M. W.} and Omar, {S. K.} and A. Ludwig and D. Geyer and A. Dreizler and J. Janicka",

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language = "English",

pages = "449",

note = "30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations ; Conference date: 25-07-2004 Through 30-07-2004",

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TY - CONF

T1 - Hydroxyl time-scale measurements in turbulent counter-flow flames

AU - Venkatesan, K.

AU - King, G. B.

AU - Laurendeau, N. M.

AU - Renfro, M. W.

AU - Omar, S. K.

AU - Ludwig, A.

AU - Geyer, D.

AU - Dreizler, A.

AU - Janicka, J.

PY - 2004

Y1 - 2004

N2 - Time-series measurements of OH concentrations were obtained for a set of turbulent counter-flow nonpremixed H2/CH4/air flames. The normalized PSD collapsed at lower frequencies, which dominated the integral time scale, but displayed residual variations at higher frequencies. The near complete collapse of the two-time statistics indicated that the integral time scale is a good representation of hydroxyl fluctuations in these counter-flow nonpremixed flames. The integral time scale depended on the combined Re and strain rate (SR) approximately as Re-L35 in counter-flow nonpremixed flames. Time-series measurements of OH concentrations were also obtained for a set of turbulent counter-flow partially premixed CH4/air flames. The effect of variations in Reynolds number and equivalence ratio on the fluctuation statistics was studied. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).

AB - Time-series measurements of OH concentrations were obtained for a set of turbulent counter-flow nonpremixed H2/CH4/air flames. The normalized PSD collapsed at lower frequencies, which dominated the integral time scale, but displayed residual variations at higher frequencies. The near complete collapse of the two-time statistics indicated that the integral time scale is a good representation of hydroxyl fluctuations in these counter-flow nonpremixed flames. The integral time scale depended on the combined Re and strain rate (SR) approximately as Re-L35 in counter-flow nonpremixed flames. Time-series measurements of OH concentrations were also obtained for a set of turbulent counter-flow partially premixed CH4/air flames. The effect of variations in Reynolds number and equivalence ratio on the fluctuation statistics was studied. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).

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M3 - Paper

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T2 - 30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations

Y2 - 25 July 2004 through 30 July 2004

ER -

Hydroxyl time-scale measurements in turbulent counter-flow flames

Abstract

Conference

ASJC Scopus subject areas

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