A Modification of the K-ε Turbulence Model for In-Cylinder Gas Flow
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概要
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A modification of the values of three constants C_1, C_2 and C_3 in the standard K-ε turbulence model is proposed, based on the empirical law of decay obtained for nearly homogeneous in-cylinder turbulence. Since the decay exponent of Reynolds numbers for in-cylinder turbulence is found to be different from that for steady ducted flow just behind a turbulence-generating grid, the C_2 value is modified first, followed by the C_1 and C_3 values, which depend on the C_2 value. The derived C_2 value of 1.40 is smaller than that in the standard K-ε turbulence model, but the C_1 value, 1.40, is close to that of the standard one. The C_3 value, -1.05, is very close to the recommended value by Morel et al. for the case of a unidirectional axial compression.
- 一般社団法人日本機械学会の論文
- 1989-02-15
著者
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KIDO Hiroyuki
Faculty of Engineering, Kyushu University
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NAKASHIMA Kenshiro
Faculty of Engineering, Kyushu University
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Kido Hiroyuki
Faculty Of Engineering Kyushu University
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Nakashima K
Faculty Of Engineering Kyushu University
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KITAGAWA Toshiaki
Faculty of Engineering, Kyushu University
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TAJIMA Hiroshi
Faculty of Engineering, Kyushu University
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Nakashima Kenshiro
Faculty Of Engineering Kyushu University
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Kitagawa Toshiaki
Dept.of Energy And Mechanical Engineering Faculty Of Engineering Kyushu University
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Kitagawa Toshiaki
Graduate School of Engineering, Kyushu University
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Kitagawa Toshiaki
Graduate School Of Engineering Kyushu University
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Kitagawa Toshiaki
Faculty Of Engineering Kyushu University
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Tajima Hiroshi
Faculty Of Engineering Kyushu University
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