Effect of model orientation on local heat transfer in a rotating two-pass smooth triangular duct Academic Article uri icon

abstract

  • This paper presents experimental heat transfer results in a two-pass triangular duct with smooth walls. The orientation of the duct is varied by turning it about its axis with respect to the rotational plane. The Coriolis and the rotational buoyancy forces play important roles in flow and heat transfer distributions in rotating ducts. A change in the duct orientation with respect to the rotating frame causes a change in the secondary vortex; and, as a consequence, the heat transfer from the individual surfaces changes. It is observed that the variations in the Nusselt number ratio profiles of the six surfaces of the two-pass triangular duct with tilt angle also depend on the rotation number. Numerical predictions with a high-Reynolds number k-ε model for a one-pass rotating triangular duct with radially outward flow accompany the experimental results to give insight to the secondary vortex structures, and velocity and temperature distributions.

author list (cited authors)

  • Dutta, S., Han, J. C., & Lee, C. P.

publication date

  • December 1994