Determination method of Markstein number based on wavenumber measurement of cellular flames at the onset of parametric instability of downward propagating flames

Delfin, Jerric R.; Guo, Feng; Hashimoto, Nozomu; Fujita, Osamu

Determination method of Markstein number based on wavenumber measurement of cellular flames at the onset of parametric instability of downward propagating flames

Delfin, Jerric R.; Guo, Feng; Hashimoto, Nozomu et al.

Proceedings of The Combustion Institute, 2024, 40(1-4), 105322

Permalink : https://hdl.handle.net/2115/97235

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/97235
タイトル	Determination method of Markstein number based on wavenumber measurement of cellular flames at the onset of parametric instability of downward propagating flames
著者	Delfin, Jerric R. ; Guo, Feng ; Hashimoto, Nozomu ; Fujita, Osamu
著者名 Delfin, Jerric R.
e-Rad_Researcher 40886206 著者名 Guo, Feng
e-Rad_Researcher 70392751 著者名 Hashimoto, Nozomu
e-Rad_Researcher 10183930 著者名 Fujita, Osamu
言語	英語
キーワード	Thermoacoustic parametric instability
	Combustion tube
	Cellular premixed flames
	Wavenumber
	Markstein number
発行日	2024
出版者	Elsevier
収録物名	Proceedings of The Combustion Institute
巻(号)	40(1-4)
ページ	105322
抄録	This work proposes a new method to estimate the Markstein number by investigating the thermoacoustic parametric instability of laminar premixed flames propagating downwards in an open-closed tube. Methane-air flames were propagated in a combustion tube to capture the flame evolution in transition to parametric instability. By synchronized high-speed imaging filming both lateral and longitudinal views of flame propagation, cellular flame wavenumbers are measured from the clear transition of flat flames to cellular flames visualized in the present approach. The Markstein number is indirectly determined from wavenumber measurements at the onset of parametric instability by employing a laminar flame model under acoustic excitation treating the Markstein number as a free parameter. Acoustic velocity fluctuation amplitudes obtained from pressure fluctuation measurements were determined to further evaluate the validity of wavenumber-derived Markstein numbers. Markstein numbers obtained in the present work are compared with Markstein numbers relative to fresh gases in the literature from indirect and computational methods.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© <2024>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1540-7489
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.proci.2024.105322