The performance of suction-side gill region film cooling is investigated using the University of Utah transonic wind tunnel and a simulated turbine vane in a two-dimensional cascade. The effects of film cooling hole orientation, shape, and number of rows, and their resulting effects on the aerodynamic losses, are considered for four different hole configurations: round axial (RA), shaped axial (SA), round radial (RR), and round compound (RC). The mainstream Reynolds number based on axial chord is 500,000, exit Mach number is 0.35, and the tests are conducted using the first row of holes, or both rows of holes at blowing ratios of 0.6 and 1.2. Carbon dioxide is used as the injectant to achieve density ratios of 1.77–1.99 similar to values present in operating gas turbine engines. Presented are the local distributions of total pressure loss coefficient, local normalized exit Mach number, and local normalized exit kinetic energy. Integrated aerodynamic losses increase anywhere from 4% to 45% compared with a smooth blade with no film injection. The performance of each hole type depends on the airfoil configuration, film cooling configuration, mainstream flow Mach number, number of rows of holes, density ratio, and blowing ratio, but the general trend is an increase in as either the blowing ratio or the number of rows of holes increase. In general, the largest total pressure loss coefficient magnitudes and the largest are generally present at any particular wake location for the RR or SA configurations, regardless of the film cooling blowing ratio and number of holes. The SA holes also generally produce the highest local peak magnitudes. magnitudes are generally lowest with the RA hole configuration. A one-dimensional mixing loss correlation for normalized values is also presented, which matches most of the both rows data for RA, SA, RR, and RC hole configurations. The equation also provides good representation of the RA, RC, and RR first row data sets.
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e-mail: p_ligrani@msn.com
e-mail: sri.sreekanth@pwc.ca
e-mail: terrance.lucas@pwc.ca
e-mail: edward.vlasic@pwc.ca
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July 2010
Research Papers
Aerodynamic Performance of Suction-Side Gill Region Film Cooling
Justin Chappell,
Justin Chappell
Department of Mechanical Engineering,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
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Phil Ligrani,
e-mail: p_ligrani@msn.com
Phil Ligrani
Donald Schultz Professor of Turbomachinery
University of Oxford
, 17 Foundry House, Walton Well Road, Oxford OX2 6AQ, England
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Sri Sreekanth,
e-mail: sri.sreekanth@pwc.ca
Sri Sreekanth
Principal Analyst
Pratt and Whitney Canada
, 1801 Courtney Park Drive East, Mississauga, ON L5A 3S8, Canada
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Terry Lucas,
e-mail: terrance.lucas@pwc.ca
Terry Lucas
Chief, Turbine Cooling and Static Structures
Pratt and Whitney Canada
, 1000 Marie-victorin, Longueuil, QC, J4G 1A1, Canada
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Edward Vlasic
e-mail: edward.vlasic@pwc.ca
Edward Vlasic
Principal Aerodynamicist
Pratt and Whitney Canada
, 1000 Marie-victorin, Longueuil, QC, J4G 1A1, Canada
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Justin Chappell
Department of Mechanical Engineering,
University of Utah
, 50 S. Central Campus Drive, MEB 2110, Salt Lake City, UT 84112-9208
Phil Ligrani
Donald Schultz Professor of Turbomachinery
University of Oxford
, 17 Foundry House, Walton Well Road, Oxford OX2 6AQ, Englande-mail: p_ligrani@msn.com
Sri Sreekanth
Principal Analyst
Pratt and Whitney Canada
, 1801 Courtney Park Drive East, Mississauga, ON L5A 3S8, Canadae-mail: sri.sreekanth@pwc.ca
Terry Lucas
Chief, Turbine Cooling and Static Structures
Pratt and Whitney Canada
, 1000 Marie-victorin, Longueuil, QC, J4G 1A1, Canadae-mail: terrance.lucas@pwc.ca
Edward Vlasic
Principal Aerodynamicist
Pratt and Whitney Canada
, 1000 Marie-victorin, Longueuil, QC, J4G 1A1, Canadae-mail: edward.vlasic@pwc.ca
J. Turbomach. Jul 2010, 132(3): 031020 (11 pages)
Published Online: April 7, 2010
Article history
Received:
February 12, 2009
Revised:
February 26, 2009
Online:
April 7, 2010
Published:
April 7, 2010
Citation
Chappell, J., Ligrani, P., Sreekanth, S., Lucas, T., and Vlasic, E. (April 7, 2010). "Aerodynamic Performance of Suction-Side Gill Region Film Cooling." ASME. J. Turbomach. July 2010; 132(3): 031020. https://doi.org/10.1115/1.3151603
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