This study is performed to investigate directly the local flame properties of turbulent propagating flames at the same weak turbulence condition (u′/SL0 = 1.4), in order to clarify basically the influence of the addition of hydrogen to methane or propane mixtures on its local burning velocity. The mixtures having nearly the same laminar burning velocity with different rates of addition of hydrogen δH are prepared. A two-dimensional sequential laser tomography technique is used to obtain the relationship between the flame shape and the flame displacement. The local flame displacement velocity SF is quantitatively obtained as the key parameters of the turbulent combustion. Additionally, the Markstein number Ma was obtained from outwardly propagating spherical laminar flames, in order to examine the effects of positive stretch and curvature on burning velocity. It was found that the trends of the mean values of measured SF with respect to δH, the total equivalence ratio Φ and fuel types corresponded well its turbulent burning velocity. The trend of the obtained Ma could explain the local burning velocity of turbulent flames only qualitatively. Based on the Ma, the local burning velocity at the part of turbulent flames with positive stretch and curvature, SLt, is estimated quantitatively. As a result, a quantitative relationship between the estimated SLt and the SF at positive stretch and curvature of turbulent flames could be observed for mixtures with increasing the Lewis number.
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ASME/JSME 2011 8th Thermal Engineering Joint Conference
March 13–17, 2011
Honolulu, Hawaii, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-3892-1
PROCEEDINGS PAPER
An Experimental Study on Properties of Local Burning Velocity for Hydrogen Added Hydrocarbon Premixed Turbulent Flames Available to Purchase
Masaya Nakahara,
Masaya Nakahara
Ehime University, Matsuyama, Japan
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Koichi Murakami,
Koichi Murakami
Ehime University, Matsuyama, Japan
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Jun Hashimoto,
Jun Hashimoto
Tsuyama National College of Technology, Tsuyama, Japan
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Atsushi Ishihara
Atsushi Ishihara
Saitama Institute of Technology, Fukaya, Japan
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Masaya Nakahara
Ehime University, Matsuyama, Japan
Koichi Murakami
Ehime University, Matsuyama, Japan
Jun Hashimoto
Tsuyama National College of Technology, Tsuyama, Japan
Atsushi Ishihara
Saitama Institute of Technology, Fukaya, Japan
Paper No:
AJTEC2011-44039, T20105; 8 pages
Published Online:
March 1, 2011
Citation
Nakahara, M, Murakami, K, Hashimoto, J, & Ishihara, A. "An Experimental Study on Properties of Local Burning Velocity for Hydrogen Added Hydrocarbon Premixed Turbulent Flames." Proceedings of the ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASME/JSME 2011 8th Thermal Engineering Joint Conference. Honolulu, Hawaii, USA. March 13–17, 2011. T20105. ASME. https://doi.org/10.1115/AJTEC2011-44039
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