Numerical predictions of three-dimensional flow and heat transfer are presented for a rotating square channel with 45 deg angled ribs as tested by Johnson et al. (1994). The rib height-to-hydraulic diameter ratio is 0.1 and the rib pitch-to-height ratio (P/e) is 10. The cross section of the ribs has rounded edges and corners. The computation results are compared with the experimental data of Johnson et al. (1994) at a Reynolds number (Re) of 25,000, inlet coolant-to-wall density ratio of 0.13, and three rotation numbers (Ro) of 0.0, 0.12, and 0.24. A multiblock numerical method has been employed with a near-wall second-moment turbulence closure model. In the present method, the convective transport equations for momentum, energy, and turbulence quantities are solved in curvilinear, body-fitted coordinates using the finite-analytic method. Pressure is computed using a hybrid SIMPLER/PISO approach, which satisfies the continuity of mass and momentum simultaneously at every time step. The second-moment solutions show that the secondary flows induced by the angled ribs, rotating buoyancy, and Coriolis forces produced strong nonisotropic turbulent stresses and heat fluxes that significantly affected flow fields and surface heat transfer coefficients. The present near-wall second-moment closure model provided an improved flow and heat transfer prediction.
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January 2001
Technical Papers
Flow and Heat Transfer in a Rotating Square Channel With 45 deg Angled Ribs by Reynolds Stress Turbulence Model
Yong-Jun Jang,
Yong-Jun Jang
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Ocean Engineering Program, Texas A&M University, College Station, TX 77843-3123
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Hamn-Ching Chen,
Hamn-Ching Chen
Ocean Engineering Program, Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136
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Je-Chin Han
Je-Chin Han
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
Search for other works by this author on:
Yong-Jun Jang
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Ocean Engineering Program, Texas A&M University, College Station, TX 77843-3123
Hamn-Ching Chen
Ocean Engineering Program, Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136
Je-Chin Han
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-229. Review Chair: D. Ballal.
J. Turbomach. Jan 2001, 123(1): 124-132 (9 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Jang, Y., Chen, H., and Han, J. (February 1, 2000). "Flow and Heat Transfer in a Rotating Square Channel With 45 deg Angled Ribs by Reynolds Stress Turbulence Model ." ASME. J. Turbomach. January 2001; 123(1): 124–132. https://doi.org/10.1115/1.1333092
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