Anumerical study was conducted to investigate the effects of airfoil thickness on the thrust generation of plunging airfoils and to assess the contributions of pressure and viscous forces in flapping propulsion. A series of NACA symmetric airfoils with thickness ratio ranging from 4.0% to 20.0% of the airfoil chord length were used in the present study to undertake a same sinusoid plunging moti...

In this numerical and statistical study, lift drag coefficient performances of NACA-0009 NACA-4415 airfoils were evaluated in accordance with various attack angle at constant velocity wind. Lift coefficients was numerically determined by computational fluid dynamics code ANSYS FLUENT. Analysis design calculations implemented using L16 orthogonal array based on Taguchi method. Angles airfoil typ...

The rotor is one of the vital components a wind turbine. In design rotor, expected result most optimal power. This purpose study to optimization Horizontal Axis Wind Turbine power various parameters such as airfoil, angle attack, and pitch angle. Airfoils (NACA 4412-2412 T.E. mod, NACA 2412-4412 L.E. mod), attack (0, 2, 4, 6), 1, 3) are parameter variations used. simulation method uses BEM (Bla...

In recent years, there has been an increased interest in the old NACA four-digit series when designing wind turbines or small aircraft. One of airfoils frequently used for this purpose is 0018 profile. However, since 1933, over 70 almost no new experimental studies profile have carried out to investigate its performance regime and medium Reynolds numbers as well various turbulence parameters. T...

the present research simulates time-periodic unsteady transonic flow around pitching airfoils via the solution of unsteady euler and navier-stokes equations, using time spectral method (tsm) and compares it with the traditional methods such as bdf and explicit structured adaptive grid method. the tsm uses a fourier representation in time and hence solves for the periodic state directly accordin...

The coupling mechanism for an existing viscous-inviscid-interaction (VII) code, developed for the analysis of two-dimensional, turbulent, attached ow around airfoils, is enhanced using the parallel direct search (PDS) optimization algorithm. It is demonstrated that this parallel processing implemented optimization scheme leads to faster convergence of the VII code, and therefore requires less c...

The coupling mechanism for an existing viscous-inviscid-interaction (VII) code, developed for the analysis of two-dimensional, turbulent, attached ow around airfoils, is enhanced using the parallel direct search (PDS) optimization algorithm. It is demonstrated that this parallel processing implemented optimization scheme leads to faster convergence of the VII code, and therefore requires less c...

The choice of geometrical shape of the blades has a considerable effect on aerodynamic performance and flow characteristics in axial compressors. In this paper, the effects of the blades shape on the aerodynamic design characteristics are investigated based on Streamline Curvature Method (SCM). Initially, the Streamline Curvature Method (SCM) is used for designing a two-stage axial compressor. ...

Iosif Taposu has formulated a mathematical model and generated family of airfoils whose geometry resembles the dolphin shape. These are characterized by sharp leading edge experiments have proven that they can achieve better aerodynamic characteristics at very high angles attack than certain classical airfoils, with nose inclined downwards. On other hand, not been applied to any commercial gene...