サーマル・ストライピング現象の解析手法の開発
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概要
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A thermal striping phenomenon characterized by a random temperature fluctuation occurs in the region immediately above the fast breeder reactor core due to the temperature difference of the core outlet coolant between subassemblies. Then the random temperature fluctuation applies a thermal stress to in-vessel structures. In this paper, we have investigated the intensity of the temperature fluctuation in water by implementing the algebraic stress turbulence model (ASM) including the second-order momentum of turbulence and the fuzzy controller to determine an optimum time step size in a general-purpose thermohydraulic analysis code. From the analysis, it is concluded that the characteristics of the temperature fluctuation intensity can be estimated efficiently by the ASM.
- 一般社団法人日本機械学会の論文
- 1991-08-25