Numerical Prediction of Effects of Perforated Plates in Conical Diffusers : 1st Report, Numerical Simulation by κ-ε Model and Estimation of Effects of Perforated Plates
スポンサーリンク
概要
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Fully developed incompressible turbulent flow in a conical diffuser with a perforated plate has been simulated numerically. A k-ε mode, which consists of two transport equations for turbulence energy and energy dissipation rate besides the mean velocity equation was applied, and a unique mathematical model was proposed to describe the effect of a perforated plate. Time-averaged distributions of velocities and pressures, and RMS values of turbulence are calculated in the whole flow region. The calculation results show that the diffuser efficiency and the uniformity of velocity distribution depend on the resistance coefficient K and location x_p of the perforated plate. The optimum combination between K and x_p is obtained for the high diffuser efficiency or the uniform velocity distribution. The Reynolds number is set at 2×10^5 and 2000 grid points are distributed. Calculations were carried out on the FACOM/M 180 system in the Institute of Industrial Science, University of Tokyo.
- 一般社団法人日本機械学会の論文
著者
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Nakayama Tohru
Univ. Of Tokyo
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KOBAYASHI Toshio
Inst. of Indust. Sei., Univ. of Tokyo
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ISHIHARA Tomo-o
Inst. of Indust. Sei., Univ. of Tokyo
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Ishihara Tomo-o
Inst. Of Indust. Sci. Univ. Of Tokyo
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Ishihara Tomo-o
Inst. Of Indust. Sei. Univ. Of Tokyo
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Kobayashi Toshio
Inst. Of Indust. Sci. Univ. Of Tokyo
関連論文
- Numerical Prediction of Effects of Perforated Plates in Conical Diffusers : 1st Report, Numerical Simulation by κ-ε Model and Estimation of Effects of Perforated Plates
- Prediction of Turbulent Flow in Two-Dimensional Channel with Turbulence Promoters : 2nd Report, Numerical Prediction by k-εModel and Comparison with Experimental Results
- Prediction of Turbulent Flow in Two-Dimensional Channel with Turbulence Promoters : 3rd Report, Improvement of Large Eddy Simulation and Formation of Streaklines
- Prediction of Turbulent Flow in Two-Dimensional Channel with Turbulence Promoters : 1st Report, Numerical Prediction by Large Eddy Simulation