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Direct comparison of PDF and scalar dissipation rates between LEM simulations and experiments for turbulent, premixed methane air flames Tsui, H. P.; Kamal, M. M.; Hochgreb, S. (Simone); Bushe, W. K.
Abstract
We present a direct comparison between the predicted and measured probability density functions (PDF) of the reaction progress variable and conditioned values of the scalar dissipation rates (SDR) in premixed turbulent flames. The predictions are based on simulations of premixed flames using the linear-eddy model (LEM), parameterised by a wide range of integral length scales and turbulent Reynolds numbers. The experimental results are highly spatially resolved temperature and species data from the Cambridge- Sandia swirl burner. The LEM simulations display remarkable accuracy in capturing the features observed experimentally. Further, the results reveal that the LEM calculated PDF and SDR for premixed flames remain relatively steady under a variety of turbulent conditions, including variations in the integral length and turbulent Reynolds number. In general, it appears to be practical to use representative pseudo-turbulent PDF and SDR models for a range of turbulence intensities and length scales.
Item Metadata
Title |
Direct comparison of PDF and scalar dissipation rates between LEM simulations and experiments for turbulent, premixed methane air flames
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Creator | |
Date Issued |
2016-03
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Description |
We present a direct comparison between the predicted and measured probability density functions (PDF)
of the reaction progress variable and conditioned values of the scalar dissipation rates (SDR) in premixed
turbulent flames. The predictions are based on simulations of premixed flames using the linear-eddy
model (LEM), parameterised by a wide range of integral length scales and turbulent Reynolds numbers.
The experimental results are highly spatially resolved temperature and species data from the Cambridge-
Sandia swirl burner. The LEM simulations display remarkable accuracy in capturing the features observed
experimentally. Further, the results reveal that the LEM calculated PDF and SDR for premixed
flames remain relatively steady under a variety of turbulent conditions, including variations in the integral
length and turbulent Reynolds number. In general, it appears to be practical to use representative
pseudo-turbulent PDF and SDR models for a range of turbulence intensities and length scales.
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Genre | |
Type | |
Language |
eng
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Date Available |
2017-02-01
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0319022
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URI | |
Affiliation | |
Citation |
Tsui HP, Kamal MM, Hochgreb S, Bushe WK. Direct comparison of PDF and scalar dissipation rates between LEM simulations and experiments for turbulent, premixed methane air flames. Combust Flame. 2016;165:208-222.
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Publisher DOI |
10.1016/j.combustflame.2015.12.006.
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Postdoctoral; Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International