... of stiffness, which is released at θ  = 0 deg and 180 deg for every half rotation thereby affecting lift, drag, and vortex formulation. Fig. 19 Design of double-cambered flexible airfoil rotating in counterclockwise Design of double-cambered flexible airfoil rotating in counterclockwise Zeiner...

... oriented perpendicular to the flow. The substrate is modified to include a conical hill (3D) or wedge (2D), and the test particle is located at various positions on this hill. The governing incompressible Navier–Stokes equations are solved using the finite volume fluent code. The coefficients of lift...

... that of the pitching motion of the airfoil were considered. The resulting lift and drag diagrams were compared with each other, as well as with the uncontrolled case and the continuous jet. It was found that oscillations in drag and lift hysteresis curves with the associated local minima and maxima were connected...

... of multiple vortices near the cylinder, is subdued for smaller rotation rates at moderate shear. It is also observed that lift forces increase linearly with shear, while the frequency of shedding shows no dependency on shear parameter. 1 Corresponding author. Contributed by the Fluids Engineering...

...Eduard Amromin According to several known experiments, an increase of the incoming flow air content can increase the hydrofoil lift coefficient. The presented theoretical study shows that such increase is associated with the decrease of the fluid density at the cavity surface. This decrease...

... for publication in the J OURNAL OF F LUIDS E NGINEERING . Manuscript received February 17, 2017; final manuscript received February 23, 2018; published online March 27, 2018. Assoc. Editor: Jun Chen. 17 02 2017 23 02 2018 Drag Experimental techniques Lift Aerodynamic drag can...

...Sang Bong Lee Two-dimensional (2D) numerical simulations of multiphase flows past a circular cylinder close to free surface waves were performed to investigate an interaction of vortex formation around a cylinder with periodic waves by utilizing waves2Foam. The lock-on responses of lift coefficient...

... and compared with the baseline NACA 63 4 -021 airfoil. Spalart–Allmaras turbulence model was applied for the numerical simulation. Compared to the sharp decline of baseline lift coefficient, the stall angle of the modified foil decreased and the decline of the lift coefficient became mild. The poststall...

...; we have also considered several other locations nearby to perform sensitivity analysis. Our results showed that placing the jet slot within a very small range upstream of the CCW vortex had tremendous effects on both lift and drag, such that maximum drag was reduced by 80%. There was another unique...

...). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving-wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4 × 10 4 . The moving belt...

...Lance W. Traub A low-speed wind tunnel investigation is presented characterizing the impact of Gurney flaps on an elliptical airfoil. The chordwise attachment location and height of the flaps were varied, as was the Reynolds number. The results showed strong nonlinearities in the lift curve which...

... 2017 Computational fluid dynamics Drag Lift Newtonian flows Unsteady flows Wakes The computation of fluid dynamic forces acting on immersed bodies is required in many engineering applications. From offshore platform to marine turbines or cable-stayed bridges are examples of very...

...Leilei Yang; Jiang Li; Jinsheng Cai; Guangqiu Wang; Zhengke Zhang The effect of the lift augmentation of multi-element airfoils with increased flap deflection and dielectric barrier discharge (DBD) plasma flow control on the flap at several angles of attack (AOAs) is investigated numerically...

... at low flow rates. Therefore, the lift/drag (LD) characteristics of two-dimensional (2D) sections along the span of an air-cooled heat exchanger (ACHE) axial fan are numerically investigated, with the future prospect of improving ADMs at these flow conditions. It is found that the blade sectional LD...