Navier-Stokes analysis of airfoils with leading edge ice accretions
作者： Mark G. Potapczuk
DOI:
关键词:
摘要: A numerical analysis of the flowfield characteristics and performance degradation an airfoil with leading edge ice accretions was performed. The important fluid dynamic processes were identified calculated. Among these separation bubble at low angles attack, complete on pressure surface resulting in premature shell, drag rise due to shape, effects angle attack separated flow field. Comparisons experimental results conducted confirm calculations. computer code which solves Navier-Stokes equations two dimensions, ARC2D, used perform Modified Mixing Length turbulence model developed produce grids for several shape combinations. Results indicate that ability predict overall characteristics, such as lift drag, is excellent. Transition location accurately determining shape. Details downstream regions requires some modifications. Calculations stalled periodic shedding vorticity generated aft accretion. Time averaged values compare favorably information. accounts history may be justified.
jaxa.jp参考文章(11)
B. E. Launder, D. B. Spalding, Mathematical Models of turbulence Academic Press. ,(1972)
Francis H. Harlow, J. Eddie Welch, Numerical Calculation of Time‐Dependent Viscous Incompressible Flow of Fluid with Free Surface Physics of Fluids. ,vol. 8, pp. 2182- 2189 ,(1965) , 10.1063/1.1761178
J.C. Wu, J.F. Thompson, Numerical solutions of time-dependent incompressible Navier-Stokes equations using an integro-differential formulation Computers & Fluids. ,vol. 1, pp. 197- 215 ,(1973) , 10.1016/0045-7930(73)90018-2
A. Sugavanam, J. C. Wu, Numerical Study of Separated Turbulent Flow over Airfoils AIAA Journal. ,vol. 20, pp. 464- 470 ,(1982) , 10.2514/3.51096
B. BALDWIN, H. LOMAX, Thin-layer approximation and algebraic model for separated turbulent flows 16th Aerospace Sciences Meeting. ,(1978) , 10.2514/6.1978-257
Peter R Eiseman, A coordinate system for a viscous transonic cascade analysis Journal of Computational Physics. ,vol. 26, pp. 307- 338 ,(1978) , 10.1016/0021-9991(78)90073-6
Richard M Beam, R.F Warming, An implicit finite-difference algorithm for hyperbolic systems in conservation-law form Journal of Computational Physics. ,vol. 22, pp. 87- 110 ,(1976) , 10.1016/0021-9991(76)90110-8
Wen-Hwa Chu, Development of a general finite difference approximation for a general domain part I: Machine transformation Journal of Computational Physics. ,vol. 8, pp. 392- 408 ,(1971) , 10.1016/0021-9991(71)90019-2
J.L. Steger, R.L. Sorenson, Automatic mesh-point clustering near a boundary in grid generation with elliptic partial differential equations Journal of Computational Physics. ,vol. 33, pp. 405- 410 ,(1979) , 10.1016/0021-9991(79)90165-7