کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
169845 | 458049 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Role of low-bandwidth open-loop control of combustion instability using a high-momentum air jet—mechanistic details
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Low-frequency modulation of a high-momentum air jet is shown to be effective in controlling combustion oscillations in a swirl-stabilized spray combustor. The oscillations in the combustor studied are dominated by a longitudinal acoustic mode (235 Hz) with a self-excited low-frequency (13 Hz) bulk mode (of the upstream cavity) superimposed. In this paper, the mechanisms leading to control using external low-frequency modulation of a high-momentum air jet are studied. It is shown that low-frequency modulation periodically alters the phase relation between pressure and heat release, and for unstable conditions, this periodic alteration of the phase leads to a reduction in pressure oscillations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 147, Issues 1–2, October 2006, Pages 22–31
Journal: Combustion and Flame - Volume 147, Issues 1–2, October 2006, Pages 22–31
نویسندگان
Jong Ho Uhm, Sumanta Acharya,