Prediction of flow field and heat transfer of high rotation numbers and density ratio flow in a square internal cooling channels of turbine blades with U-turn as tested by Wagner et al. (ASME J. Turbomach., 113, pp. 42–51, 1991) is the main focus of this study. Rotation, buoyancy, and strong curvature affect the flow within these channels. Due to the fact that RSM turbulence model can respond to the effects of rotation, streamline curvature and anisotropy without the need for explicit modeling, it is employed for this study as it showed improved prediction compared to isotropic two-equation models. The near wall region was modeled using enhanced wall treatment approach. The Reynolds Stress Model (RSM) was validated against available experimental data (which are primarily at low rotation and buoyancy numbers). The model was then used for cases with high rotation numbers (as much as 1.29) and high-density ratios (up to 0.4). Particular attention is given to how secondary flow, velocity and temperature profiles, turbulence intensity, and Nusselt number area affected by Coriolis and buoyancy/centrifugal forces caused by high levels of rotation and buoyancy in the immediate vicinity of the bend. The results showed that four-side-average Nu, similar to low Ro cases, increases linearly by increasing rotation number and, unlike low Ro cases, decreases slightly by increasing density ratio.
Skip Nav Destination
e-mail: asleiti@ucf.edu
Article navigation
October 2005
Technical Papers
Fluid Flow and Heat Transfer in Rotating Curved Duct at High Rotation and Density Ratios
A. K. Sleiti,
A. K. Sleiti
Mechanical, Materials and Aerospace Department,
e-mail: asleiti@ucf.edu
University of Central Florida
, Orlando, FL 32816
Search for other works by this author on:
J. S. Kapat
J. S. Kapat
Mechanical, Materials and Aerospace Department,
University of Central Florida
, Orlando, FL 32816
Search for other works by this author on:
A. K. Sleiti
Mechanical, Materials and Aerospace Department,
University of Central Florida
, Orlando, FL 32816e-mail: asleiti@ucf.edu
J. S. Kapat
Mechanical, Materials and Aerospace Department,
University of Central Florida
, Orlando, FL 32816J. Turbomach. Oct 2005, 127(4): 659-667 (9 pages)
Published Online: May 24, 2005
Article history
Received:
May 5, 2004
Revised:
May 24, 2005
Citation
Sleiti, A. K., and Kapat, J. S. (May 24, 2005). "Fluid Flow and Heat Transfer in Rotating Curved Duct at High Rotation and Density Ratios." ASME. J. Turbomach. October 2005; 127(4): 659–667. https://doi.org/10.1115/1.2019276
Download citation file:
Get Email Alerts
Evaluating Thin-Film Thermocouple Performance on Additively Manufactured Turbine Airfoils
J. Turbomach (July 2025)
Thermohydraulic Performance and Flow Structures of Diamond Pyramid Arrays
J. Turbomach (July 2025)
Related Articles
Investigation of Detached Eddy Simulations in Capturing the Effects of Coriolis Forces and Centrifugal Buoyancy in Ribbed Ducts
J. Heat Transfer (July,2007)
Large Eddy Simulation of Flow and Heat Transfer in a 90 deg Ribbed Duct With Rotation: Effect of Coriolis and Centrifugal Buoyancy Forces
J. Turbomach (October,2004)
Flow and Heat Transfer in a Rotating Square Channel With 45 deg Angled Ribs by Reynolds Stress Turbulence Model
J. Turbomach (January,2001)
Related Proceedings Papers
Related Chapters
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Introduction
Design and Analysis of Centrifugal Compressors
Inside the Building
Geothermal Heat Pump and Heat Engine Systems: Theory and Practice