A201 OPTICAL OBSERVATION OF VORTEX-FLAME INTERACTION USING SPARK-IGNITED PREMIXED FLAMES IN A QUASI-TURBULENT AND QUIESCENT WAKE(Laminar flame-1)
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概要
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Structure and behavior of spark-ignited propane-air premixed flames established in the quasiturbulent and quiescent wake, which is generated by quickly moving a fine rod-array vertically downward in the quiescent stoichiometric propane-air mixture, 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 0.2〜0.5mm and the tangential velocity of 4.0m/s, and therefore that it satisfies rather small and intense turbulence conditions of l_d/δ_L≈1 and ν_θ/S_L≈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 0.2〜2mm, the turbulent flame established in the quasi-turbulent and quiescent wake with the moderately intense turbulence conditions of l_d/δ_L≈1 and v_θ/S_L≈10 is classified into the finely wrinkled laminar flame.
- 社団法人日本機械学会の論文
- 2000-10-01
著者
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Ohiwa N
Nagoya Inst. Technol. Nagoya Jpn
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Ohiwa Norio
Graduate School Of Engineering Nagoya Inst. Of Technol.
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Ohiwa Norio
Department Of Mechanical Engineering Nagoya Institute Of Technology
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ISHINO Yojiro
Department of Mechanical Engineering, Nagoya Institute of Technology
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HATTORI Yasunori
Tamano Works, Mitsui Engineering & Shipbuilding Co., Ltd.
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Ishino Yojiro
Department Of Mechanical Engineering Nagoya Institute Of Technology
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Hattori Yasunori
Tamano Works Mitsui Engineering & Shipbuilding Co. Ltd.
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