Abstract The trailing edge deformable wing is one of the main development directions future aircraft design. technology active camber can significantly improve aerodynamic performance aircraft. In this paper, motor drives parabolic crankshaft and distributed flexible skin wing, which realize deflection at a large angle 0~30 degrees. At same time, surface continuous smooth. Moreover, simulation ...

Numerical simulations of the unsteady flow over a low-aspect-ratio, low Reynolds number semi-circular planform wing are performed using Lattice Boltzmann method. The simulations exactly match the flow conditions and the detailed geometry from previous wind-tunnel experiments, including the flow actuators installed internally along the leading edge of the wing. To reproduce the pulsed-blowing ac...

Recent studies about the Lamb vector have led to development of vortex-force theory: a formulation able predict aerodynamic force in compressible flows and decompose it into lift, lift-induced drag, profile drag. Here, revised theory developed at ONERA collaboration with University Naples is presented applied steady transonic flows. In mathematical developments, special care given presence shoc...

The aim of the present study was to analyze the hydrodynamic characteristics of a true model of a swimmer hand with the thumb in different positions using numerical simulation techniques. A three-dimensional domain was created to simulate the fluid flow around three models of a swimmer hand, with the thumb in different positions: thumb fully abducted, partially abducted, and adducted. These thr...

The unsteady flow characteristics of a supercritical OAT15A airfoil with shock control bump were numerically studied by wall-modeled large eddy simulation. numerical method was first validated the buffet and nonbuffet cases baseline airfoil. Both pressure coefficient velocity fluctuation coincided well experimental data. Then, four different bumps tested. A height h/c = 0.008 location xB/c 0.55...

The principal aim of this paper is to investigate the numerical effects a deformable flap by means quasi-static cambering following an Airbus A320 designed prototype in Smart Morphing and Sensing European project. This able camber Electro-Mechanical Actuators (EMA) achieve high amplitude deformation up 10 cm. mechanism allows improve aerodynamic performances high-lift system during take-off fli...

Abstract This paper endeavors to discuss the long-range guided mortar projectile scheme and gliding extended range ballistics design. Starting from glide ballistic kinematics equation, analysis results show that lift-drag ratio maximum height are two most important factors affecting capability of projectiles. conclusion, verified by simulation analysis, is expected provide certain guidance for ...

Bluff body calculation was accelerated by using a special-purpose computer, MDGRAPE-2, that was exclusively designed for molecular dynamics simulations. The three main issues were solved regarding the implementation of the MDGRAPE-2 on vortex methods. These issues were the efficient calculation of the Biot-Savart and stretching equation, the optimization of the table domain, and the round-off e...

This paper describes the development of what might be considered the first successful ultralight sailplane. The SWIFT is a high performance foot-launched glider, designed to combine some of the convenience of hang gliders with the soaring performance of sailplanes. It takes off and lands like a hang glider, yet maintains exceptional performance at high speeds, achieving a lift-to-drag ratio of ...