This paper presents the swirl purge flow on a platform and a modeled land-based turbine rotor blade suction surface. Pressure-sensitive paint (PSP) mass transfer technique provides detailed film-cooling effectiveness distribution on the platform and phantom cooling effectiveness on the blade suction surface. Experiments were conducted in a low-speed wind tunnel facility with a five-blade linear cascade. The inlet Reynolds number based on the chord length is 250,000. Swirl purge flow is simulated by coolant injection through 50 inclined cylindrical holes ahead of the blade leading edge row. Coolant injections from cylindrical holes pass through nozzle endwall and a dolphin nose axisymmetric contour before reaching the platform and blade suction surface. Different “coolant injection angles” and “coolant injection velocity to cascade inlet velocity” result in various swirl ratios to simulate real engine conditions. Simulated swirl purge flow uses coolant injection angles of 30 deg, 45 deg, and 60 deg to produce swirl ratios of 0.4, 0.6, and 0.8, respectively. Traditional purge flow has a coolant injection angle of 90 deg to generate swirl ratio of 1. Coolant to mainstream mass flow rate (MFR) ratio is 0.5%, 1.0%, and 1.5% for all the swirl ratios. Coolant to mainstream density ratio maintains at 1.5 to match engine conditions. Most of the swirl purge and purge coolant approach the platform; however, a small amount of the coolant migrates to the blade suction surface. Swirl ratio of 0.4 has the highest relative motion between rotor and coolant and severely decreases film cooling and phantom cooling effectiveness. Higher MFR of 1% and 1.5% cases suffers from apparent decrement of the effectiveness while increasing relative motion.
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August 2016
Research-Article
Turbine Platform Cooling and Blade Suction Surface Phantom Cooling From Simulated Swirl Purge Flow
Shiou-Jiuan Li,
Shiou-Jiuan Li
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: asjlme2008f@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: asjlme2008f@gmail.com
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Jiyeon Lee,
Jiyeon Lee
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
Search for other works by this author on:
Je-Chin Han,
Je-Chin Han
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
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Luzeng Zhang,
Luzeng Zhang
Solar Turbines Incorporated,
San Diego, CA 92101
San Diego, CA 92101
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Hee-Koo Moon
Hee-Koo Moon
Solar Turbines Incorporated,
San Diego, CA 92101
San Diego, CA 92101
Search for other works by this author on:
Shiou-Jiuan Li
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: asjlme2008f@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: asjlme2008f@gmail.com
Jiyeon Lee
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
Je-Chin Han
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Luzeng Zhang
Solar Turbines Incorporated,
San Diego, CA 92101
San Diego, CA 92101
Hee-Koo Moon
Solar Turbines Incorporated,
San Diego, CA 92101
San Diego, CA 92101
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received December 14, 2015; final manuscript received January 12, 2016; published online March 15, 2016. Editor: Kenneth C. Hall.
J. Turbomach. Aug 2016, 138(8): 081004 (11 pages)
Published Online: March 15, 2016
Article history
Received:
December 14, 2015
Revised:
January 12, 2016
Citation
Li, S., Lee, J., Han, J., Zhang, L., and Moon, H. (March 15, 2016). "Turbine Platform Cooling and Blade Suction Surface Phantom Cooling From Simulated Swirl Purge Flow." ASME. J. Turbomach. August 2016; 138(8): 081004. https://doi.org/10.1115/1.4032676
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