Pratt & Whitney, General Electric, Rolls- Royce, Office of Naval Research (ONR), Siemens Power Generation, General Electric Global Research

Virginia Tech -  Publications

• Effects of Mid-Passage Gap, Endwall Misalignment, and Roughness on Endwall Film-Cooling - Journal of Turbomachinery , vol. 128, pp. 62-70, ASME Turbo Expo, Reno, (GT2005-68900) – Awarded the Heat Transfer Committee Best Paper Award for 2005
• The Effects of Varying the Combustor- Turbine Gap - Accepted to the Journal of Turbomachinery, ASME Turbo Expo, Barcelona , (GT2006-90089)
• Effects of Surface Deposition, Hole Blockage, and TBC Spallation on Vane Endwall Film Cooling - Accepted to the Journal of Turbomachinery, ASME Turbo Expo, Barcelona, (GT2006-90379)
• Effects of Deposits on Film Cooling of a Vane Endwall Along the Pressure Side - Recommended to the Journal of Turbomachinery - ASME Turbo, Montreal, (GT2007-27131)
• Bump and Trench Modifications to Film Cooling Holes at the Vane Endwall Junction - Recommended to the Journal of Turbomachinery, ASME Turbo Expo, Montreal, (GT2007-27132)
• Flowfield Measurements of the Endwall Leading Edge With Film-Cooling - ASME Turbo Expo 2008:  Power for Land, Sea and Air, June 2008, Berlin, Germany

Virginia Tech -  Theses

• Effects of Realistic First-Stage Turbine Endwall Features - M.S. Thesis, Cardwell, N. D., 2005, Virginia Tech
• Effects of Surface Conditions on Endwall Film-Cooling - Ph.D. Dissertation, Sundaram, N., 2007, Virginia Tech (to be published)

University of Texas at Austin  -  Publications

• Degradation of Film Cooling Performance on a Turbine Vane Suction Side Due to Surface Roughness - ASME Gas Turbine Expo, Reno, Nevada, ASME Paper GT2005-69045
• The Effects of Obstructions on Film Cooling Effectiveness on the Suction side of a Gas Turbine Vane - ASME Turbo Expo, Barcelona, Spain, ASME Paper GT-2006-90577
• High Resolution Film Cooling Effectiveness Measurements of Axial Holes Embedded in a Transverse Trench with Various Trench Configurations - ASME Turbo Expo, Barcelona, Spain , ASME Paper GT-2006-90226
• High Resolution Film Cooling Effectiveness Comparison of Axial and Compound Angle Holes on the Suction Side of a Turbine Vane - ASME Turbo Expo, Barcelona, ASME Paper GT-2006-90225
• Degradation of Film Cooling Performance on a Turbine Vane Suction Side Due to Surface Roughness - ASME J. of Turbomachinery, vol. 128, 2006, pp. 547-554
• Effects of Regular and Random Roughness on the Heat Transfer and Skin friction Coefficient on the Suction Side of a Gas Turbine Vane - ASME Turbo Expo, Montreal, Canada , ASME Paper GT-2007-27285
• Effects of Obstructions and Surface Roughness on Film Cooling Effectiveness With and Without a Transverse Trench - ASME Gas Turbine Expo, Montreal, Canada, ASME Paper GT2007-28003
• Effects of Surface Roughness and Near Hole Obstructions on Film Cooling Effectiveness - ASME Gas Turbine Expo, Montreal , Canada , ASME Paper GT2007-28004
• High Resolution Film Cooling Effectiveness Comparison of Axial and Compound Angle Holes on the Suction Side of a Turbine Vane - ASME J. of Turbomachinery, 2007 (accepted)
• High Resolution Film Cooling Effectiveness Measurements of Axial Holes Embedded in a Transverse Trench With Various Trench Configurations - ASME J. of Turbomachinery, 2007. (accepted)

University of Texas at Austin - Theses

• Roughness Impact on Turbine Vane Suction Side Film Cooling Effectiveness - M.S. Thesis, Robertson, D.R., 2004, University of Texas at Austin
• Suction Side Roughness Effects on Film Cooling Heat Transfer on a First Stage Nozzle Guide Vane - M.S. Thesis, Rutledge, J.L., 2004, University of Texas at Austin
• The Effects of Obstructions on Film Cooling Effectiveness on the Suction Side of a Gas Turbine Vane - M.S. Thesis, Demling, T., 2005, University of Texas at Austin
• Effects of Roughness on Film Effectiveness on the Pressure Side of a Turbine Vane - M.S. Thesis, Warren, D. J., 2005, University of Texas at Austin
• Film Cooling Effectiveness of Suction Side Axial Holes, Compound Angle Holes, and Axial Holes Embedded within an Overlying Transverse Trench - M.S. Thesis, Waye, S.K., 2005, University of Texas at Austin
• Effects or Regular and Random Roughness on the Heat Transfer and Skin Friction Coefficient on the Suction Side of a Gas Turbine Vane - M.S. Thesis, Dees, J.E., 2006, University of Texas at Austin
• Rough Wall and Near-Hole Obstruction Effects on Film Cooling with and without a Transverse Trench - M.S. Thesis, Somawardhana, R.P., 2006, University of Texas at Austin

Performing Member Contact:

Danesh Tafti, Associate Professor

Virginia Polytechnic Institute and State University
114 Randolph Hall, Mechanical Engineering Department
Blacksburg, VA 24061
540-231-9975 /FAX 540-231-9100
dtafti@vt.edu

• Virginia Tech's Center for Turbomachinery and Propulsion Research includes faculty from the Mechanical Engineering, Aerospace and Ocean Engineering, and Electrical and Computer Engineering Departments. The Center is actively working on projects concerned with combustion instabilities, turbine aero and heat transfer issues, unsteady stator/rotor interactions, distortion effects in compressor performance, turbine engine noise, analyses methods for controlling performance variability, rotor dynamics, magnetic bearings, and active flow control for reducing high-cycle fatigue.

  The research projects use experimental facilities such as a heated transonic turbine blade cascade with cryogenic cooling to achieve high density ratios between the coolant and hot gas flows, a transonic compressor cascade, a moving wall compressor cascade, and a number of low speed wind tunnels with linear airfoil cascades. Rotor dynamics is studied using various facilities, which include a variable speed motor drive capable of 14,000 rpm for identification of fluid film bearing characteristics. Test rigs for combustion studies include a full scale combustor capable of high pressure combustion. In addition to the facilities mentioned, there is an airport laboratory that houses an operational JT15D-1 turbofan engine that can generate up to 2500 lbf of thrust. Instrumentation used for these studies include laser Doppler velocimeters, hot-wire anemometers, Schlieren systems, pressures probes, fast-responding heat flux sensors, thermal liquid crystals, and infrared thermography. In addition to a number of workstations and PCs, computational facilities include a cluster of 1,100 Apple G5s capable of 10.3 trillion operations per second, which makes the Virginia Tech Terascale Computing Facility the third-fastest machine in the world.