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A Comparative Study Using CFD to Predict Iced Airfoil AerodynamicsWIND, Fluent, and PowerFLOW were used to predict the lift, drag, and moment coefficients of a business-jet airfoil with a rime ice (rough and jagged, but no protruding horns) and with a glaze ice (rough and jagged end has two or more protruding horns) for angles of attack from zero to and after stall. The performance of the following turbulence models were examined by comparing predictions with available experimental data. Spalart-Allmaras (S-A), RNG k-epsilon, shear-stress transport, v(sup 2)-f, and a differential Reynolds stress model with and without non-equilibrium wall functions. For steady RANS simulations, WIND and FLUENT were found to give nearly identical results if the grid about the iced airfoil, the turbulence model, and the order of accuracy of the numerical schemes used are the same. The use of wall functions was found to be acceptable for the rime ice configuration and the flow conditions examined. For rime ice, the S-A model was found to predict accurately until near the stall angle. For glaze ice, the CFD predictions were much less satisfactory for all turbulence models and codes investigated because of the large separated region produced by the horns. For unsteady RANS, WIND and FLUENT did not provide better results. PowerFLOW, based on the Lattice Boltzmann method, gave excellent results for the lift coefficient at and near stall for the rime ice, where the flow is inherently unsteady.
Document ID
20050185210
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Chi, x.
(Michigan State Univ. East Lansing, MI, United States)
Li, Y.
(Exa Corp. Burlington, MA, United States)
Chen, H.
(Exa Corp. Burlington, MA, United States)
Addy, H. E.
(NASA Glenn Research Center Cleveland, OH, United States)
Choo, Y. K.
(NASA Glenn Research Center Cleveland, OH, United States)
Shih, T. I-P.
(Iowa State Univ. of Science and Technology Ames, IA, United States)
Date Acquired
September 7, 2013
Publication Date
March 8, 2005
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 2005-1371
Meeting Information
Meeting: 43rd AIAA Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 1, 2005
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAG3-2576
WBS: WBS 22-077-41-10
CONTRACT_GRANT: NNC04GB25G
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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