Comparison of OH time-series measurements and large-eddy simulations in hydrogen jet flames
Identifieur interne : 001698 ( Main/Exploration ); précédent : 001697; suivant : 001699Comparison of OH time-series measurements and large-eddy simulations in hydrogen jet flames
Auteurs : Michael W. Renfro [États-Unis] ; Amit Chaturvedy [États-Unis] ; Galen B. King [États-Unis] ; Normand M. Laurendeau [États-Unis] ; Andreas Kempf [Allemagne] ; Andreas Dreizler [Allemagne] ; Johannes Janicka [Allemagne]Source :
- Combustion and flame [ 0010-2180 ] ; 2004.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Simulation, Hydrogène.
English descriptors
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Abstract
Hydroxyl time-series measurements have been obtained using picosecond time-resolved laser-induced fluorescence in a turbulent H2N2 jet diffusion flame. The flame is well characterized, as it is part of the Turbulent Nonpremixed Flame Workshop. Large-eddy simulations (LES) of the same flame were used to predict OH, density, and mixture fraction temporal statistics. The two sets of results are for the first time compared to examine in detail the LES-predicted time scales for OH fluctuations. These time scales come from complete time series and cannot be recovered from more common single-time measurements or time-averaged simulations. The measured and predicted power spectral densities for OH are found to collapse to the same shape when normalized by the local integral time scale. Hence, LES predicts the correct scale distribution for scalar fluctuations. The measured time scales range from 0.4 to 1.1 ms along the jet centerline. The LES results are quantitatively low (predicted fluctuations are too fast) by a factor of two. Grid resolution, the chemical submodel, and procedures for time-series processing are found to have insignificant effects on the computed time scales. However, the turbulent fluctuations prescribed on the inflow plane strongly influence scalar time scales, indicating that separate validation of mixture fraction and velocity time scales are necessary for further model development.
Affiliations:
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Renfro</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Mechanical Engineering, University of Connecticut</s1><s2>Storrs, CT 06269-3139</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Connecticut</region></placeName></affiliation></author><author><name sortKey="Chaturvedy, Amit" sort="Chaturvedy, Amit" uniqKey="Chaturvedy A" first="Amit" last="Chaturvedy">Amit Chaturvedy</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>School of Mechanical Engineering, Purdue University</s1><s2>West Lafayette, IN 47907-1288</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Indiana</region></placeName></affiliation></author><author><name sortKey="King, Galen B" sort="King, Galen B" uniqKey="King G" first="Galen B." last="King">Galen B. 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Renfro</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Mechanical Engineering, University of Connecticut</s1><s2>Storrs, CT 06269-3139</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Connecticut</region></placeName></affiliation></author><author><name sortKey="Chaturvedy, Amit" sort="Chaturvedy, Amit" uniqKey="Chaturvedy A" first="Amit" last="Chaturvedy">Amit Chaturvedy</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>School of Mechanical Engineering, Purdue University</s1><s2>West Lafayette, IN 47907-1288</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Indiana</region></placeName></affiliation></author><author><name sortKey="King, Galen B" sort="King, Galen B" uniqKey="King G" first="Galen B." last="King">Galen B. King</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>School of Mechanical Engineering, Purdue University</s1><s2>West Lafayette, IN 47907-1288</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Indiana</region></placeName></affiliation></author><author><name sortKey="Laurendeau, Normand M" sort="Laurendeau, Normand M" uniqKey="Laurendeau N" first="Normand M." last="Laurendeau">Normand M. Laurendeau</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>School of Mechanical Engineering, Purdue University</s1><s2>West Lafayette, IN 47907-1288</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Indiana</region></placeName></affiliation></author><author><name sortKey="Kempf, Andreas" sort="Kempf, Andreas" uniqKey="Kempf A" first="Andreas" last="Kempf">Andreas Kempf</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Technische Universitat Darmstadt, Petersenstrasse 30</s1><s2>64287 Darmstadt</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Hesse (Land)</region><region type="district" nuts="2">District de Darmstadt</region><settlement type="city">Darmstadt</settlement></placeName></affiliation></author><author><name sortKey="Dreizler, Andreas" sort="Dreizler, Andreas" uniqKey="Dreizler A" first="Andreas" last="Dreizler">Andreas Dreizler</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Technische Universitat Darmstadt, Petersenstrasse 30</s1><s2>64287 Darmstadt</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Hesse (Land)</region><region type="district" nuts="2">District de Darmstadt</region><settlement type="city">Darmstadt</settlement></placeName></affiliation></author><author><name sortKey="Janicka, Johannes" sort="Janicka, Johannes" uniqKey="Janicka J" first="Johannes" last="Janicka">Johannes Janicka</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Technische Universitat Darmstadt, Petersenstrasse 30</s1><s2>64287 Darmstadt</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Hesse (Land)</region><region type="district" nuts="2">District de Darmstadt</region><settlement type="city">Darmstadt</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Combustion and flame</title><title level="j" type="abbreviated">Combust. flame</title><idno type="ISSN">0010-2180</idno><imprint><date when="2004">2004</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Combustion and flame</title><title level="j" type="abbreviated">Combust. flame</title><idno type="ISSN">0010-2180</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Combustion</term><term>Comparative study</term><term>Diffusion flame</term><term>Hydrogen</term><term>Hydroxyl</term><term>Laser induced fluorescence</term><term>Measurement</term><term>Simulation</term><term>Turbulent flame</term><term>Turbulent fluctuation</term><term>Turbulent jet</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etude comparative</term><term>Mesure</term><term>Simulation</term><term>Hydrogène</term><term>Hydroxyle</term><term>Fluorescence induite par laser</term><term>Flamme turbulente</term><term>Jet turbulent</term><term>Flamme diffusion</term><term>Fluctuation turbulente</term><term>Combustion</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Simulation</term><term>Hydrogène</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Hydroxyl time-series measurements have been obtained using picosecond time-resolved laser-induced fluorescence in a turbulent H<sub>2</sub>N<sub>2</sub> jet diffusion flame. The flame is well characterized, as it is part of the Turbulent Nonpremixed Flame Workshop. Large-eddy simulations (LES) of the same flame were used to predict OH, density, and mixture fraction temporal statistics. The two sets of results are for the first time compared to examine in detail the LES-predicted time scales for OH fluctuations. These time scales come from complete time series and cannot be recovered from more common single-time measurements or time-averaged simulations. The measured and predicted power spectral densities for OH are found to collapse to the same shape when normalized by the local integral time scale. Hence, LES predicts the correct scale distribution for scalar fluctuations. The measured time scales range from 0.4 to 1.1 ms along the jet centerline. The LES results are quantitatively low (predicted fluctuations are too fast) by a factor of two. Grid resolution, the chemical submodel, and procedures for time-series processing are found to have insignificant effects on the computed time scales. However, the turbulent fluctuations prescribed on the inflow plane strongly influence scalar time scales, indicating that separate validation of mixture fraction and velocity time scales are necessary for further model development.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>États-Unis</li></country><region><li>Connecticut</li><li>District de Darmstadt</li><li>Hesse (Land)</li><li>Indiana</li></region><settlement><li>Darmstadt</li></settlement></list><tree><country name="États-Unis"><region name="Connecticut"><name sortKey="Renfro, Michael W" sort="Renfro, Michael W" uniqKey="Renfro M" first="Michael W." last="Renfro">Michael W. Renfro</name></region><name sortKey="Chaturvedy, Amit" sort="Chaturvedy, Amit" uniqKey="Chaturvedy A" first="Amit" last="Chaturvedy">Amit Chaturvedy</name><name sortKey="King, Galen B" sort="King, Galen B" uniqKey="King G" first="Galen B." last="King">Galen B. King</name><name sortKey="Laurendeau, Normand M" sort="Laurendeau, Normand M" uniqKey="Laurendeau N" first="Normand M." last="Laurendeau">Normand M. Laurendeau</name></country><country name="Allemagne"><region name="Hesse (Land)"><name sortKey="Kempf, Andreas" sort="Kempf, Andreas" uniqKey="Kempf A" first="Andreas" last="Kempf">Andreas Kempf</name></region><name sortKey="Dreizler, Andreas" sort="Dreizler, Andreas" uniqKey="Dreizler A" first="Andreas" last="Dreizler">Andreas Dreizler</name><name sortKey="Janicka, Johannes" sort="Janicka, Johannes" uniqKey="Janicka J" first="Johannes" last="Janicka">Johannes Janicka</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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