The present paper introduces a parametric optimization of several Active Flow Control (AFC) parameters applied to NACA-8412 airfoil at single post-stall Angle Attack (AoA) 15∘ and Reynolds number Re = 68.5×103. aim is enhance the efficiency maximize its lift. boundary layer separation point was modified using Synthetic Jet Actuators (SJA), carried on by systematically changing pulsating frequen...

The correlation between computational fluid dynamics (CFD) and experimental (EFD) is crucial for the behavior prediction of aerodynamic bodies. This paper’s objective twofold: (1) to develop a method that approaches commercial CFD codes their link with EFD in more efficient way, using downscaled model, (2) investigate effect rain on wing. More specifically, we one-phase two-phase flow over typi...

The problem of modeling the flow around an airfoil type transport vehicle near ground is considered. turbulent. Nowadays, most advanced mathematical models aerodynamics are based on physical properties a viscous compressible gas and Reynolds-averaged Navier – Stokes equations. Mathematical turbulent flows remains one challenging problems. Reliable prediction characteristics extremely important ...

Abstract. Modern wind-turbine airfoil design requires robust performance predictions for varying thicknesses, shapes, and appropriate Reynolds numbers. The airfoils of current large offshore wind turbines operate with chord-based numbers in the range 3–15 million. Turbulence transition boundary layer is known to play an important role aerodynamics these near operating point. While lack predicti...

A rapid predictive tool based on the linearised Reynolds-averaged Navier-Stokes equations is proposed in this work to investigate secondary currents generated by streamwise-independent surface topography modulations turbulent channel flow. The derived coupling momentum equation Spalart-Allmaras transport for eddy viscosity, using a nonlinear constitutive relation Reynolds stresses capture corre...

Abstract The paper explains further developments of a new concept called TNC (Thickness Noise Control) the application surface ventilation to reduction helicopter rotor low-frequency in-plane harmonic (LF-IPH) noise. method is based on introduction four cavities covered by perforated plates (connected low and high pressure reservoirs) positioned symmetrically at front rear extremities blade tip...

Crop residue management received little attention until about 1970. Records of crop residue production are limited, but crop yield databases have been available since 1865. Carbon sequestration and other conservation benefits require a detailed knowledge of crop residue production and management. Our objectives are to: (i) review grain and biomass yield, harvest index (HI), and root C/shoot C r...

Computational Fluid Dynamics (CFD) simulations were performed to predict the interference drag produced by two streamlined struts intersecting at various angles in transonic flow since no relevant experimental data are available for use in design studies. The one-equation Spalart-Allmaras turbulence model was employed in a RANS formulation assuming fully-turbulent flow. Selected cases were run ...

The present study focuses on the impact of eddy viscosity turbulence models benchmark INSEAN E779A marine propeller hydroacoustic performance under non-cavitating and open water conditions. In numerical calculations, Realisable k-epsilon (k-?), k-? Shear Stress Transport (k-? SST) Spalart-Allmaras models, which are widely used in hydrodynamic fields, selected. Hydroacoustic model is predicted w...