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- W2383058009 abstract "Low-Reynolds-number flows over airfoils are characterized by the presence of separation bubbles.The separation bubbles are unsteady and have a significant impact on the overall flow field.The separated boundary layer is unstable and rapidly undergoes transition,and then the turbulent flow reattaches.This paper numerically simulates the unsteady two dimensional low-Reynolds-number flow over Eppler387 airfoil with an unsteady Navier-Stokes(N-S) solver closed by two-equation SST k-ω turbulence model.The N-S equations and two turbulence equations are advanced in time with an implicit approximate-factorization(AF) method and solved uncoupled from each other;the pseudo time sub-iteration(τ-ts) is used for unsteady computations for second-order temporal accuracy.Upwind spatial differencing is used for the inviscid terms,and viscous terms are centrally differenced,the flux difference splitting method of Roe is employed to obtain fluxes at the faces.The unsteady laminar and turbulent calculations with a twolayer algebraic eddy viscosity(B-L) model are also done for comparison;the transition location is fixed for both SST k-ω and B-L turbulence model.An analysis of the numerical solutions show the influence of transition to the overall flow,the unstable of separation bubbles and periodic vortex shedding,the time-averaged lift,drag and pressure coefficients are compared with experimental values and are in good agreement with experimental results." @default.
- W2383058009 created "2016-06-24" @default.
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- W2383058009 date "2006-01-01" @default.
- W2383058009 modified "2023-09-23" @default.
- W2383058009 title "Numerical analysis of low-Reynolds-number flow over airfoil" @default.
- W2383058009 hasPublicationYear "2006" @default.
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