Large Eddy Simulations of Rotating Square Duct with Normal Rib Turbulators

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 p/p) is 0.13. The rib height-to-hydraulic diameter ratio (e/D) is 0.1 and the rib pitch-to-height ratio (P/e) 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.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013704

Entities

People

  • Arun K. Saha
  • Mayank Tyagi
  • Sumanta Acharya

Organizations

  • Louisiana State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Buoyancy
  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Flow
  • Flow Fields
  • Flow Rate
  • Fluid Flow
  • Heat Transfer
  • Large Eddy Simulation
  • Layers
  • Mass Transfer
  • Mechanical Engineering
  • Periodic Variations
  • Secondary Flow
  • Stratified Fluids

Fields of Study

  • Engineering
  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Materials Science
  • Thermal Physics or Thermal Science.