The effect of freestream turbulence with different vortical structures on the stagnation region heat transfer was experimentally studied. Reynolds numbers, based on leading edge diameter of the heat transfer model with a cylindrical leading edge, ranged from 67,750 to 142,250. Turbulence generating grids of parallel rods were placed at several positions upstream of the heat transfer model in orientations where the rods were perpendicular and parallel to the stagnation line. The turbulence intensity and ratio of integral length scale to leading edge diameter were in the range 3.93 to 11.78 percent and 0.07 to 0.70, respectively. The grids with rods perpendicular to the stagnation line, where the primary vortical structures are expected to be perpendicular to the stagnation line, result in higher heat transfer than those with rods parallel to the stagnation line. The measured heat transfer data and turbulence characteristics are compared with existing correlation models.
Skip Nav Destination
Article navigation
Technical Papers
Effect of Turbulence With Different Vortical Structures on Stagnation Region Heat Transfer
Aung N. Oo, Graduate Student,
Aung N. Oo, Graduate Student
Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John’s, Newfoundland, A1B 3X5, Canada
Search for other works by this author on:
Chan Y. Ching, Associate Professor
Chan Y. Ching, Associate Professor
Dept. of Mechanical Engineering, McMaster University, Hamilton, Ontario, L8S 4L7, Canada
Search for other works by this author on:
Aung N. Oo, Graduate Student
Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John’s, Newfoundland, A1B 3X5, Canada
Chan Y. Ching, Associate Professor
Dept. of Mechanical Engineering, McMaster University, Hamilton, Ontario, L8S 4L7, Canada
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division June 30, 2000; revision received January 20, 2001. Associate Editor: M. Faghri.
J. Heat Transfer. Aug 2001, 123(4): 665-674 (10 pages)
Published Online: January 20, 2001
Article history
Received:
June 30, 2000
Revised:
January 20, 2001
Citation
Oo, A. N., and Ching, C. Y. (January 20, 2001). "Effect of Turbulence With Different Vortical Structures on Stagnation Region Heat Transfer ." ASME. J. Heat Transfer. August 2001; 123(4): 665–674. https://doi.org/10.1115/1.1375165
Download citation file:
Get Email Alerts
Cited By
Related Articles
Effects Of Dimple Depth on Channel Nusselt Numbers and Friction Factors
J. Heat Transfer (August,2005)
Stagnation Line Heat Transfer Augmentation Due to Freestream
Vortical Structures and Vorticity
J. Heat Transfer (June,2002)
Nusselt Numbers and Flow Structure on and Above a Shallow Dimpled
Surface Within a Channel Including Effects of Inlet Turbulence Intensity
Level
J. Turbomach (April,2005)
Direct Numerical Simulation of Turbulent Separated Flow and Heat Transfer Over a Blunt Flat Plate
J. Heat Transfer (October,2003)
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Applications
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
Turbulent Fluid Flow and Heat Transfer
Applications of Mathematical Heat Transfer and Fluid Flow Models in Engineering and Medicine