A NUMBER of military and civilian applications require efficient operation of airfoils in low chord Reynolds numbers. The applications include propellers, sailplanes, ultralight mancarrying/man-powered aircraft, high-altitude vehicles, wind turbines, unmanned aerial vehicles, and micro air vehicles. Careful management of boundary layers on low-Reynolds-number airfoils is required to alleviate t...

la a rather aeaeral sense, ia"erse airfoU desila caa be takea to meaa the problem of speclfyinl a desired set of airfoU characteristics, sudl as tbe airfoU maxima .. tblekaess ratio, pltchlal moment, part of tbe "e1oclty distributioa, or bouadary-layer develop_t. From tills laformatloa, the correspoadinl airfoU shape is determiaed. This paper presents a metbod tbat approacha tbe desiga problem ...

<p>Airfoil telah mengalami banyak perkembangan dan optimalisasi melalui berbagai cara. Terdapat teknik yang dapat digunakan untuk memodifikasi bentuk arifoil standar ada saat ini. Metode PARSEC merupakan salah satu parameterisasi paling airfoil. Paper ini menyediakan penjelasan komprehensif.mengenai implementasi metode pada bahasa pemrograman <em>python</em>. Studi menggunakan...

The paper represents the second part of a study related to the development of an actuators control system for a morphing wing application, and describes the experimental validation of the control designed in the first part. After a short presentation of the finally adopted control architecture, the physical implementation of the control is done. To implement the controller on the physical model...

This paper deals with developing an efficient Robust Design Optimization (RDO) framework. The goal is to obtain an aerodynamic shape that is less sensitive to small random geometry perturbations and to uncertain operational conditions. The initial shape is the RAE2822 airfoil which is parameterized with 10 design variables. The robust design formulation used is based on an expectation measure. ...

The usage of Direct Metal Deposition (DMD) technology for repairing defective voids in high-value metallic components is time consuming, since traditional geometric reconstruction methods are not seamlessly connected to the DMD process. Here, we consider the development of a semi-automated geometric algorithm for “virtually” repairing defective voids that appear on gas turbine airfoils after ex...

Unmanned aerial vehicles (UAVs) performing their operations for a long time have been attracting much attention in military and civil aviation industries for the past decade. The applicable field of UAV is changing from the military purpose only to the civil one. Because of their low operation cost, high reliability and the necessity of various application areas, numerous development programs h...

Keywords: BiGlobal Stability Airfoil Ellipse Separation Conformal mapping A methodology based on spectral collocation numerical methods for global flow stability analysis of incompressible external flows is presented. A potential shortcoming of spectral methods, namely the handling of the complex geometries encountered in global stability analysis, has been dealt with successfully in past works...

A wing submerged in the wake of an upstream airfoil experiences periodic forces. The frequency and amplitude oscillations produce vortex streets varying wavelength circulation. lift coefficient depends on a single parameter, which is Strouhal number based airfoil.

An adjoint-based Navier-Stokes design and optimization method for two-dimensional multi-element high-lift configurations is derived and presented. The compressible Reynolds-Averaged Navier-Stokes (RANS) equations are used as a flow model together with the Spalart-Allmaras turbulence model to account for high Reynolds number effects. Using a viscous continuous adjoint formulation, the necessary ...