GE Global Research, Solar Turbines

• Investigation of Detached Eddy Simulations in Capturing the Effects of Coriolis Forces and Centrifugal Buoyancy in Ribbed Ducts - Submitted ASME J. Heat Transfer , September 2006, accepted
• Capturing the Effects of Rotation in Sudden Expansion Ducts Using Detached Eddy Simulations - Submitted AIAA J., September 2006
• Simulation of Flow and Heat Transfer in the Developing Flow Region of a Rotating Gas Turbine Blade Internal Cooling Duct with Coriolis and Buoyancy Forces - ASME J. Turbomachinery 129, pp. 1-7, 2007
• A Comparative Study of DES and URANS for Flow Prediction in a Two-Pass Internal Cooling Duct - ASME J. Fluids Engineering , 128(6), pp. 1336-1345, November 2006
• Detached Eddy Simulation of Flow and Heat Transfer in Fully-Developed Rotating Internal Cooling Channel With Normal Ribs - Int. J. Heat and Fluid Flow 27(3), pp. 351-370, 2006
• Large Eddy Simulation of Flow and Heat Transfer in the 180º Bend Region of a Stationary Ribbed Gas Turbine Blade Internal Cooling Duct - ASME J. Turbomachinery (128), pp.763-771, 2006
• Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Two-Pass Internal Cooling Duct - Int. J. Heat and Fluid Flow 27(1), pp. 1-20, 2006
• Experimental Validation of Large Eddy Simulations of Flow and Heat Transfer in a Stationary Ribbed Duct - Int. J. Heat and Fluid Flow 27 (2), pp. 243-258, 2006
• Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Ribbed Duct - ASME J. Fluids Engineering 127(5), pp. 888-896, 2005
• Evaluating the Role of Subgrid Stress Modeling in a Ribbed Duct for the Internal Cooling of Turbine Blades - Int. J Heat and Fluid Flow 26(1), pp. 92-104, 2005
• Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct With Rotation - Effect of Coriolis and Centrifugal Buoyancy Forces - J. Turbomachinery 126(4), pp. 627-636, 2004
• Large Eddy Simulation of the Fully Developed Flow and Heat Transfer in a Rotating Duct With 45° Ribs - GT 2006-90229, ASME Turbo Expo 2006, 8- 11 May 2006, Barcelona, Spain
• A Comparative Study of DES and URANS in a Two-pass Internal Cooling Duct With Normal Ribs - IMECE2005-79288, 2005 ASME International Mechanical Engineering Congress and Exposition, November 5-11, 2005 , Orlando , Florida
• Large Eddy Simulation of Flow and Heat Transfer in an Internal Cooling Duct with High Blockage Ratio 45 o staggered Ribs - GT 2005-68086, Proceedings of ASME Turbo Expo 2005, June 6-9, Reno-Tahoe , USA
• Large Eddy Simulation of Flow and Heat Transfer in a Ribbed Duct With Skewed Ribs of Rounded Cross-section - GT 2005-68117, Proceedings of ASME Turbo Expo 2005, June 6-9, Reno-Tahoe, USA
• Detached Eddy Simulation of Flow and Heat Transfer in a Stationary Internal Cooling Duct with Skewed Ribs - GT 2005-68118, Proceedings of ASME Turbo Expo 2005, June 6-9, Reno-Tahoe , USA
• Large Eddy Simulation of Flow and Heat Transfer in the 180º Bend Region of a Stationary Ribed Gas Turbine Blade Internal Cooling Duct - Proceedings of the ASME Turbo Expo 2005, Reno-Tahoe, Nevada, ASME Paper No. GT2005-68518
• Large Eddy Simulation of Flow and Heat Transfer in the Developing Flow Region of a Rotating Gas Turbine Blade Internal Cooling Duct With Coriolis and Buoyancy Forces - Proceedings of the ASME Turbo Expo 2005, Reno-Tahoe, Nevada, ASME Paper No. GT2005-68519
• Flowfield Measurements in a Ribbed Channel Relevant to Internal Turbine Blade Cooling - GT2004-53361, ASME Turbo Expo 2004, Vienna, Austria
• Detached Eddy Simulation of Turbulent Flow and Heat Transfer in a Duct -
  HT- FED 2004-56152, 2004 ASME Heat Transfer/Fluids Engineering Summer Conference, July 11-15, Charlotte
• Large Eddy Simulation of Flow and Heat Transfer in a Staggered 45º Ribbed Duct - GT2004-53800, ASME Turbo Expo: 2004, Vienna , Austria
• Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct with Rotation – Effect of Coriolis Forces - GT2004-53796, ASME Turbo Expo 2004, Vienna , Austria
• Large Eddy Simulations of Flow and Heat Transfer in a 90º Ribbed Duct with Rotation - Effect of Coriolis and Centrifugal Buoyancy Forces - GT2004-53799, ASME Turbo Expo 2004, Vienna , Austria
• Large Eddy Simulation of the Developing Region of a Stationary Ribbed Internal Turbine Blade Cooling Channel - GT2004-53832, ASME Turbo Expo 2004, Vienna, Austria
• Large Eddy Simulation of the Developing Region of a Rotating Ribbed Internal Turbine Blade Cooling Channel - GT2004-53833, ASME Turbo Expo 2004, Vienna, Austria
• Large Eddy Simulations of Heat Transfer in A Ribbed Channel for Internal Cooling of Turbine Blades - Paper No. GT2003-38122, Proceedings of ASME/IGTI Turbo Expo, Atlanta, Georgia , June 16-19, 2003
• Large Eddy Simulation of Flow and Heat Transfer in an Internal Cooling Duct with High Blockage Ration 45º Staggered Ribs GT 2005-68086 - Proceedings of ASME Turbo Expo 2005, June 6-9, 2005, Reno, Nevada

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.