Flow around turbulence promoters in parallel channel, (I). Flow patterns around cylinder-type turbulence promoters.:Flow Patterns around Cylinder-Type Turbulence Promoters

概要

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Flow characteristics in relation to heat transfer characteristics in parallel channel with turbulence promoters were studied experimentally. Flow visualization experiments were made in paralle channel with one or two turbulence promoters for Reynolds number region of 100 ?? Re<SUB>ω</SUB> ?? 3, 600. The vortex patterns behind one promoter were that a steady vortex was formed for low Reynolds number and vortex was shed for high Reynolds number. For higher Reynolds number, it was observed that shedding vortex caused other vortices or disappeared itself randomly. The results indicate that the shedding vortices will aug-ment heat transfer, whereas the steady vortex will give rise to deterioration in heat trans-fer. This inference agrees with the experimental results of Hishida et al. The results of two promoters experiment showed that the maximum performance of promoter would be attained at p/d7. This agrees with the results formerly studied by other investigators.
一般社団法人日本原子力学会の論文