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- SHIMURA Masayasu
- Tokyo Institute of Technology
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- AOKI Kozo
- Tokyo Institute of Technology
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- TANAHASHI Mamoru
- Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- 直接数値計算に基づく矩形旋回型乱流燃焼器内の熱音響モードに関する研究
- チョクセツ スウチ ケイサン ニ モトズク クケイ センカイガタ ランリュウ ネンショウキ ナイ ノ ネツ オンキョウ モード ニ カンスル ケンキュウ
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Abstract
<p>This article introduces a research on thermoacoustic instability based on direct numerical simulation (DNS) of a hydrogen-air turbulent swirling premixed flame in a cuboid combustor. To investigate thermoacoustic instability and dynamic modes of a turbulent swirling premixed flame, dynamic mode decomposition (DMD) and spectral analysis are applied to results of the DNS. DMD of pressure field shows that the quarter-wave mode in longitudinal acoustics has the largest energy, while DMD of heat release rate field reveals that the quarter-wave mode in longitudinal acoustics is not a dominant mode in heat release rate field. It has found that oscillation modes caused by large scale vortical motions have large energy not only in pressure field but also in heat release rate field. Dynamic modes of the source term of classical acoustic energy equation are also discussed with the vortical motion and the resonance mode of the combustor.</p>
Journal
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- Journal of the Combustion Society of Japan
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Journal of the Combustion Society of Japan 59 (187), 16-23, 2017
Combustion Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680175356160
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- NII Article ID
- 130006351439
- 40021102604
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- NII Book ID
- AA11658490
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- ISSN
- 24241687
- 13471864
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- NDL BIB ID
- 027989839
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed