Three-dimensional direct numerical simulations (DNSs) of turbulent premixed planar, jet and V flames of hydrogen-air mixture have been conducted to investigate the flame brush and the local flame structures at high Reynolds number turbulences. The detail kinetic mechanism including 12 reactive species and 27 elementary reactions was used to represent the hydrogen-air reaction. For planar flame, flame front is highly fluctuating, and multi-layer structure, multiply-folded flame front and unburned mixture island which lead to corresponding increase of the flame brush thickness can be observed. The flame brush thickness of the planar flame is relatively uniform along the flame front, and is about 2∼3 times the integral length scale (l), which is defined from an energy spectrum. For the jet and V flames, the flame brush thicknesses grow with the streamwise direction from about 0.5∼1 times the integral length scale (l) to about 2∼3 times the integral length scale (l) due to the highly fluctuating flame front at the downstream region.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Flame Brush Structure of H2-Air Turbulent Premixed Flames at High Reynolds Numbers Available to Purchase
Youngsam Shim,
Youngsam Shim
Tokyo Institute of Technology, Tokyo, Japan
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Shoichi Tanaka,
Shoichi Tanaka
Tokyo Institute of Technology, Tokyo, Japan
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Masayasu Shimura,
Masayasu Shimura
Tokyo Institute of Technology, Tokyo, Japan
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Naoya Fukushima,
Naoya Fukushima
Tokyo Institute of Technology, Tokyo, Japan
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Mamoru Tanahashi,
Mamoru Tanahashi
Tokyo Institute of Technology, Tokyo, Japan
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Toshio Miyauchi
Toshio Miyauchi
Tokyo Institute of Technology, Tokyo, Japan
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Youngsam Shim
Tokyo Institute of Technology, Tokyo, Japan
Shoichi Tanaka
Tokyo Institute of Technology, Tokyo, Japan
Masayasu Shimura
Tokyo Institute of Technology, Tokyo, Japan
Naoya Fukushima
Tokyo Institute of Technology, Tokyo, Japan
Mamoru Tanahashi
Tokyo Institute of Technology, Tokyo, Japan
Toshio Miyauchi
Tokyo Institute of Technology, Tokyo, Japan
Paper No:
AJK2011-02020, pp. 1227-1233; 7 pages
Published Online:
May 25, 2012
Citation
Shim, Y, Tanaka, S, Shimura, M, Fukushima, N, Tanahashi, M, & Miyauchi, T. "Flame Brush Structure of H2-Air Turbulent Premixed Flames at High Reynolds Numbers." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 1227-1233. ASME. https://doi.org/10.1115/AJK2011-02020
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