کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10264374 | 457804 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
DNS of Intrinsic ThermoAcoustic modes in laminar premixed flames
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: DNS of Intrinsic ThermoAcoustic modes in laminar premixed flames DNS of Intrinsic ThermoAcoustic modes in laminar premixed flames](/preview/png/10264374.png)
چکیده انگلیسی
Recent studies [Hoeijmakers et al. 2014, Emmert et al. 2015] suggest that thermoacoustic modes can appear in combustors with anechoic terminations, which have no acoustic eigenmodes. These modes, called here Intrinsic ThermoAcoustic (ITA), can be predicted with simple theoretical arguments, but have been ignored for a long time. They are reproduced in this paper using Direct Numerical Simulation (DNS) of a laminar premixed Bunsen type flame. DNS results and theory are compared showing very good agreement in terms of both frequency and mode structure. DNS confirms that the frequency of ITA modes does not depend on any acoustic characteristic of the burner. Based on a numerical evaluation of the Flame Transfer Function, stability limits of ITA modes predicted by theory are also recovered in the DNS with reasonable accuracy. Finally, DNS is used to analyze the mechanisms of ITA modes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 162, Issue 11, November 2015, Pages 4331-4341
Journal: Combustion and Flame - Volume 162, Issue 11, November 2015, Pages 4331-4341
نویسندگان
Emilien Courtine, Laurent Selle, Thierry Poinsot,