Optical Observation of Vortex-Flame Interaction Using Spark-Ignited Premixed Flames in a Quasi-Turbulent and Quiescent Wake.
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Structure and behavior of spark-ignited propane-air premixed flames established in the quasi-turbulent and quiescent wake, which is generated by quickly moving a fine rod-array vertically downward in the quiescents stoichiometric propane-air mixtue, are observed and analyzed using tomography and PTV. It is found that the quasi-turbulent and quiescent wake proposed here is composed of Karman vortex streets with the characteristic length scale ranging 0.2∼0.5 mm and the tangential velocity of 4.0 m/s, and therefore that it satisfies rather small and intense turbulence conditions of ld/δL〓1 and vθ/SL〓10. Since the interface between the unburnt and burnt gases exhibits complicated and rugged appearances and consists of a continuous series of wrinkled flame elements of the length scale ranging 0.2∼2 mm, the turbulent flame established in the quasi-turbulent and quiescent wake with the moderately intense turbulence conditions of ld/δL〓1 and vθ/SL〓10 is classified into the finely wrinkled laminar flame.
収録刊行物
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- JSME International Journal Series B Fluids and Thermal Engineering
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JSME International Journal Series B Fluids and Thermal Engineering 43 (4), 563-569, 2000
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282679653878016
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- NII論文ID
- 130004003871
- 110003474378
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- NII書誌ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 5586519
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可