Accession Number:

ADP013704

Title:

Large Eddy Simulations of Rotating Square Duct with Normal Rib Turbulators

Descriptive Note:

Conference paper

Corporate Author:

LOUISIANA STATE UNIV BATON ROUGE DEPT OF MECHANICAL ENGINEERING

Report Date:

2001-08-01

Pagination or Media Count:

8.0

Abstract:

Large Eddy Simulations LES were performed to study the flow physics and heat transfer in a rotating ribbed duct. This numerical study is simulating the experiments conducted to investigate the effects of buoyancy and Coriolis forces on heat transfer in a turbine blade internal coolant passages Wagner et al., 1992. The computations were performed at a Reynolds number Re of 12,500 based on average velocity in the duct and the hydraulic diameter of the square duct. The rotation number Ro is 0.12 and the inlet coolant-to-wall density ratio delta pp is 0.13. The rib height-to-hydraulic diameter ratio eD is 0.1 and the rib pitch-to-height ratio Pe is 10. The ribs are square in cross-section and are placed transverse to the flow in the duct. A direct method of computing a source term due to unsteady calculation of uniform wall temperature case in periodic geometries is presented. The details of flow field and the temperature field are presented and analyzed.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE