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Keywords: Lift
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Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2022, 144(6): 061113.
Paper No: FE-21-1455
Published Online: April 5, 2022
... 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...
Includes: Supplementary data
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2018, 140(11): 111203.
Paper No: FE-17-1835
Published Online: August 6, 2018
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121202.
Paper No: FE-17-1634
Published Online: June 26, 2018
... 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. The effect of axis ratio (AR) of the cylinders on the wake...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. August 2018, 140(8): 084501.
Paper No: FE-17-1445
Published Online: March 29, 2018
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2018, 140(6): 061205.
Paper No: FE-17-1104
Published Online: March 27, 2018
.... Among other key observations, they define stall as a region in which the lift force is reduced and is paired by a corresponding increase in drag force. Both the drop in lift force (here defined as “side force”) and increase in drag force are exhibited at inflection points in C d A curves...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2018, 140(6): 061202.
Paper No: FE-17-1448
Published Online: February 6, 2018
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021108.
Paper No: FE-16-1494
Published Online: October 31, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2018, 140(1): 011107.
Paper No: FE-17-1258
Published Online: October 4, 2017
...; 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2018, 140(1): 011104.
Paper No: FE-17-1171
Published Online: September 20, 2017
...). 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2017, 139(10): 101102.
Paper No: FE-16-1437
Published Online: July 19, 2017
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2017, 139(8): 081202.
Paper No: FE-16-1628
Published Online: May 18, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. March 2016, 138(3): 031401.
Paper No: FE-15-1313
Published Online: October 27, 2015
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2015, 137(8): 081101.
Paper No: FE-14-1348
Published Online: August 1, 2015
... in blade sectional lift coefficients is generally observed for Φ > 0 . 105 , with the exclusion of sections at the hub and tip, due to the influence of 3D flow patterns. These lift coefficients reach a plateau at lower flow rates. Actuator-disk models (ADMs) use blade element theory...