The occurrence of aircraft icing can significantly affect flight performance. One the most important aspects in study anti-icing technology for is distribution overflow water. Owing to external airflow pressure, shear stress, and surface tension, water film breaks up form steady rivulets. Experiments on NACA0012 airfoil surfaces were conducted based an open straight-flow low-speed wind tunnel. ...

In this work, the aerodynamic performance and optimization of a vertical-axis wind turbine with high tip-speed ratio are theoretically studied on basis two-dimensional airfoil theory. By dividing rotating plane into upwind downwind areas, relationship among angle attack, azimuth, pitch angle, is derived using quasi-steady model, loads then obtained. applying polynomial approximation to function...

Abstract Composite materials have become the approach to solve high stiffness and light weight of unmanned aerial vehicle structures. The wing had an extremely important influence on flight vehicle. optimal composite design aroused widespread attention since it enhanced aerodynamic performance vehicles. This article was intended optimize with advantages in performance. According parameters mili...

Abstract Computational fluid dynamics (CFD) simulations are nowadays been intensively used in aeronautical industries to analyse the aerodynamic performance of different aircraft configurations within a design process. These allow reduce time and cost compared wind tunnel experiments or flight tests. However, for complex configurations, CFD may still take several hours using high-performance co...

Abstract A newly developed frosting simulation method, p-VOF is applied to simulate the dynamic frost formation on NACA0012 airfoil under strong convection. The method a pseudo VOF of multiphase flow with phase change. By solving simplified mass conservation equation explicitly instead original volume fraction equations in CFD software, efficiency and robustness calculation are greatly improved...

Flapping wing dynamics are of great interest in many research areas, such as bioinspired systems and aircraft aeroelasticity. The findings the present study provide significant insight into importance leading-edge dynamic incidence on propulsive performance flapping airfoils. main objective is to improve characteristics by adding a pitching conventional NACA0012 airfoil at lower spectrum Reynol...

Wind tunnel tests were performed on an aerofoil section comparable to that of a full scale helicopter blade section with an upstream active Gurney flap in the framework of the European project CleanSky ITD Green RotorCraft. A modified NACA0012 profile was used, with 23 Kulite pressure transducers embedded in the profile’s surface and with an integrated actuator system for the Gurney flap. The G...

An experimental investigation on the flow topology over a rotor operating at low Reynolds numbers is presented. The feasibility of laminar to turbulent transition experiments small rotors demonstrated. Phase-locked infrared thermography coupled with simultaneous force and torque measurements were used study three bladed NACA0012 aerofoil section set uniform angle incidence 10°. Boundary layer w...

Taking the rigid NACA0012 airfoil as object, key structural parameters of spring–mass system that govern dynamics double-elastic-constrained flapping hydrofoil are numerically studied in this paper. A two-dimensional numerical model, based on CFD software FINE/Marine, is established to investigate influence spring stiffness coefficient, frequency ratio, and damping coefficient motion performanc...