This paper experimentally investigates the effect of rotation on heat transfer in typical turbine blade serpentine coolant passage with ribbed walls at low Mach numbers. To achieve the low Mach number (around 0.01) condition, pressurized Freon R-134a vapor is utilized as the working fluid. The flow in the first passage is radial outward, after the 180° tip turn the flow is radial inward to the second passage, and after the 180° hub turn the flow is radial outward to the third passage. The effects of rotation on the heat transfer coefficients were investigated at rotation numbers up to 0.6 and Reynolds numbers from 30,000 to 70,000. Heat transfer coefficients were measured using the thermocouples-copper-plate-heater regional average method. Heat transfer results are obtained over a wide range of Reynolds numbers and rotation numbers. An increase in heat transfer rates due to rotation is observed in radially outward passes; a reduction in heat transfer rate is observed in the radially inward pass. Regional heat transfer coefficients are correlated with Reynolds numbers for non-rotation and with rotation numbers for rotating condition, respectively. The results can be useful for understanding real rotor blade coolant passage heat transfer under low Mach number, medium-high Reynolds number and high rotation number conditions.
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ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
June 3–7, 2013
San Antonio, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5514-0
PROCEEDINGS PAPER
Heat Transfer in Rotating Serpentine Coolant Passage With Ribbed Walls at Low Mach Numbers
Shang-Feng Yang,
Shang-Feng Yang
Texas A&M University, College Station, TX
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Je-Chin Han,
Je-Chin Han
Texas A&M University, College Station, TX
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Ching-Pang Lee
Ching-Pang Lee
Siemens Energy, Inc., Orlando, FL
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Shang-Feng Yang
Texas A&M University, College Station, TX
Je-Chin Han
Texas A&M University, College Station, TX
Salam Azad
Siemens Energy, Inc., Orlando, FL
Ching-Pang Lee
Siemens Energy, Inc., Orlando, FL
Paper No:
GT2013-94288, V03AT12A009; 12 pages
Published Online:
November 14, 2013
Citation
Yang, S, Han, J, Azad, S, & Lee, C. "Heat Transfer in Rotating Serpentine Coolant Passage With Ribbed Walls at Low Mach Numbers." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 3A: Heat Transfer. San Antonio, Texas, USA. June 3–7, 2013. V03AT12A009. ASME. https://doi.org/10.1115/GT2013-94288
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