多重曲がり管内の流れと熱伝達の解析(熱工学,内燃機関,動力など)

概要

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The heat transfer is enhanced in curved pipes by the secondary flow. Its stirring effect is expected to be more augmented in multiple pipe bends which form a coiled pipe with periodically canging the plane of curvature. Numerical investigations of flow and temperature field including the developing region in such a pipe are carried out in laminar flow regime using parabolized governing equations. The calculation method has been validated for coiled pipes. In multiple pipe bends, Coriolis force due to the change of curvature plane causes complicated secondary flow pattern, realizing more homogeneous mixing. In the case of high Prandtl number fluids, the heat transfer is more enhanced in multiple pipe bends compared with in ordinary coiled pipes. Meanwhile, this is not the case for low Prandtl number fluids. The mechanism which causes this opposite effect is also discussed.
一般社団法人日本機械学会の論文
2003-12-25