壁面におかれた2円管まわりの熱伝達特性

抄録

The heat transfer of two circular cylinders fixed on a plane wall aligned in-line has been investigated in a cross flow of air. The turbulent boundary layer thickness along the wall with no cylinder present was about 21 mm. The test cylinder diameter (d) was 15-15.3 mm, and the pitch (p) between the two cylinders was 16.5-66 mm (p/d=1.1-4.4). The Reynolds number (Re) based on the undisturbed uniform flow velocity above the wall ranged from 9000-40000. Variations in the characteristic features of the local and mean Nusselt numbers are discussed in relation to the values p/d and Re, with the pressure distributions around each cylinder and the features of the flow field investigated.