CFD Analysis of the Aerodynamics of a Business-Jet Airfoil with Leading-Edge Ice Accretion

For rime ice - where the ice buildup has only rough and jagged surfaces but no protruding horns - this study shows two dimensional CFD analysis based on the one-equation Spalart-Almaras (S-A) turbulence model to predict accurately the lift, drag, and pressure coefficients up to near the stall angle. For glaze ice - where the ice buildup has two or more protruding horns near the airfoil's leading edge - CFD predictions were much less satisfactory because of the large separated region produced by the horns even at zero angle of attack. This CFD study, based on the WIND and the Fluent codes, assesses the following turbulence models by comparing predictions with available experimental data: S-A, standard k-epsilon, shear-stress transport, v(exp 2)-f, and differential Reynolds stress.

[1]  Tom Shih,et al.  Computing Aerodynamic Performance of 2D Iced Airfoils: Blocking Strategy and Convergence Rate , 2002 .

[2]  F. Menter.  Improved two-equation k-omega turbulence models for aerodynamic flows , 1992 .

[3]  Harold E. Addy,et al.  A Numerical Evaluation of Icing Effects on a Natural Laminar Flow Airfoil , 2000 .

[4]  Andy P. Broeren,et al.  Flowfield Measurements About an Airfoil with Leading-Edge Ice Shapes , 2006 .

[5]  B. Launder,et al.  Ground effects on pressure fluctuations in the atmospheric boundary layer , 1978, Journal of Fluid Mechanics.

[6]  F. Menter.  Performance of popular turbulence model for attached and separated adverse pressure gradient flows , 1992 .

[7]  John W. Slater,et al.  User Manual for Beta Version of TURBO-GRD: A Software System for Interactive Two-Dimensional Boundary/ Field Grid Generation, Modification, and Refinement , 1998 .

[8]  B. Launder,et al.  The numerical computation of turbulent flows , 1990 .

[9]  A. Cary,et al.  A Structured and Hybrid-unstructured Grid Euler and Navier-Stokes Solver for General Geometry , 2004 .

[10]  R. J. Roelke,et al.  Enhancing control of grid distribution in algebraic grid generation , 1992 .

[11]  J. Shim,et al.  A Computational Investigation of Ice Geometry Effects on Airfoil Performances , 2001 .

[12]  V. C. Patel,et al.  Near-wall turbulence models for complex flows including separation , 1988 .

[13]  P. Durbin.  A Reynolds stress model for near-wall turbulence , 1993, Journal of Fluid Mechanics.

[14]  Addy,et al.  Ice Accretions and Icing Effects for Modern Airfoils , 2000 .

[15]  Chris Nelson,et al.  Recent Improvements to the Wind(-US) Code at AEDC , 2004 .

[16]  Yung Choo,et al.  Computing Aerodynamic Performance of 2-D Iced Airfoils with Structured Grids , 2003 .

[17]  Song Fu,et al.  Modelling strongly swirling recirculating jet flow with Reynolds-stress transport closures , 1987 .

[18]  P. Spalart.  A One-Equation Turbulence Model for Aerodynamic Flows , 1992 .

[19]  Donald C. Braun,et al.  Smagglce: Surface Modeling and Grid Generation for Iced Airfoils: Phase 1 Results , 2000 .

[20]  R. J. Roelke,et al.  Algebraic grid generation for complex geometries , 1991 .

[21]  James J. Chung,et al.  Navier-Stokes Analysis of Flowfield Characteristics of an Ice-Contaminated Aircraft Wing , 2000 .