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Comparison of Computational and Experimental Results for a Transonic Variable-Speed Power-Turbine Blade Operating with Low Inlet Turbulence LevelsA computational assessment of the aerodynamic performance of the midspan section of a variable-speed power-turbine blade is described. The computation comprises a periodic single blade that represents the 2-D Midspan section VSPT blade that was tested in the NASA Glenn Research Center Transonic Turbine Blade Cascade Facility. A commercial, off-the-shelf (COTS) software package, Pointwise and CFD++, was used for the grid generation and RANS and URANS computations. The CFD code, which offers flexibility in terms of turbulence and transition modeling options, was assessed in terms of blade loading, loss, and turning against test data from the transonic tunnel. Simulations were assessed at positive and negative incidence angles that represent the turbine cruise and take-off design conditions. The results indicate that the secondary flow induced at the positive incidence cruise condition results in a highly loaded case and transitional flow on the blade is observed. The negative incidence take-off condition is unloaded and the flow is very two-dimensional. The computational results demonstrate the predictive capability of the gridding technique and COTS software for a linear transonic turbine blade cascade with large incidence angle variation.
Document ID
20150022111
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Booth, David
(Army Research Lab. Adelphi, MD, United States)
Flegel, Ashlie
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
December 1, 2015
Publication Date
July 25, 2015
Subject Category
Fluid Mechanics And Thermodynamics
Aircraft Design, Testing And Performance
Report/Patent Number
GRC-E-DAA-TN25120
Meeting Information
Meeting: AIAA/SAE/ASEE Joint Propulsion Conference
Location: Orlando, FL
Country: United States
Start Date: July 27, 2015
End Date: July 29, 2015
Sponsors: American Inst. of Aeronautics and Astronautics, Society of Automotive Engineers, Inc., American Society for Engineering Education
Funding Number(s)
WBS: WBS 664817.02.03.02.01.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
turbomachinery
rotary wing
variable speed power turbine
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