Laminar Convective Heat Transfer in Rotating Curved Pipes

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概要

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• When a coiled pipe rotates about the coil axis, the fluid flowing in it is subjected to both Coriolis and centrifugal forces. These combined effects complicate the flow characteristics beyond those seen in stationary curved pipes. Following a previous paper on the flow characteristics, a combined theoretical and numerical study on forced convective heat transfer is made for a fully developed laminar flow in rotating curved pipes. The similarity analysis reveals that convective heat transfer in loosely-coiled rotating pipes is characterized by four parameters : the Dean number K_<LC>, the body force ratio F, the Rossby number Ro and the Prandtl number Pr. The Prandtl number determines the sensitivity of heat transfer to the secondary flow ; limiting behaviours of the temperature field are discussed for various Pr based on the dimensionless energy equation. The variations of temperature structure with K_<LC>, F and Pr are shown, and the effect of Ro on heat transfer is described. Semi-empirical formulae for average heat transfer rate are given for a wide range of these parameters by using a new dimensionless variable.

• 一般社団法人日本機械学会の論文
• 1999-08-15

著者

• Ishigaki Hiroshi

  Kakuda Research Center National Aerospace Laboratory

関連論文

• The Effect of Buoyancy on Laminar Flow and Heat Transfer in Pipes
• Analogy of Forced Convective Heat Transfer between Laminar Flows in Curved Pipes and Orthogonally Rotating Pipes
• Analogy between Developing Laminar Flows in Curved Pipes and Orthogonally Rotating Pipes
• Laminar Convective Heat Transfer in Rotating Curved Pipes

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