Journal ArticleDOI
Vortex Trapping by Different Cavities on an Airfoil
Aswin Vuddagiri,Abdus Samad +1 more
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In this paper, the authors presented the flow over an airfoil with different cavity shapes placed on the suction surface of a symmetric airframe, and the cavity with both sharp edges showed better results in terms of lift and drag as compared to other shapes of the cavity.Abstract:
The paper presents the flow over an airfoil with different cavity shapes placed on the suction surface of a symmetric airfoil. Unsteady simulations of flow over the airfoil with and without cavities were performed by Reynolds averaged Navier-Stokes (RANS) solver. Lift and drag were checked and the separation point identified at different Reynolds numbers and different angles of attack. The airfoil with cavity produced more drag and less lift as compared to the airfoil without cavity. The cavity with both sharp edges showed better results in terms of lift and drag as compared to other shapes of the cavity.read more
Citations
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Study of drag reduction using periodic spanwise grooves on incompressible viscous laminar flows
Pooyan Tirandazi,Carlos Hidrovo +1 more
TL;DR: In this article, the authors study periodic, infinitely long spanwise grooves on a laminar boundary layer over a plate for 1000 $R\phantom{\rule{0}{0ex}}{e}_{L}$ 25000 below a certain width-to-depth aspect ratio (AR), a primary vortex inside each groove causes the freestream to slip over, reducing skin friction.
Journal ArticleDOI
The effects of surface modification on aerodynamic characteristics of airfoil DU 06 W 200 at low Reynolds numbers
Omid Zargar,Tee Lin,Andrew Gare Zebua,Ting-Jun Lai,Yang-Cheng Shih,Shih-Cheng Hu,Graham J. Leggett +6 more
TL;DR: In this paper , the flow characteristics and velocity fields over the vertical axis wind turbines DU 06 W 200 airfoil developed by Delft University of Technology and some other innovative designs are examined by computational fluid dynamics (CFD) simulation and particle image velocimetry (PIV) measurements.
Journal ArticleDOI
New Airfoil-Design Concept with Improved Aerodynamic Characteristics
L. Lazauskas,B. K. Kirke +1 more
Journal ArticleDOI
Horizontal axis wind turbines passive flow control methods: a review
Sudhanshu S. Manerikar,Sourabh R. Damkale,Sanjay N. Havaldar,Shubhanga V. Kulkarni,Yash A. Keskar +4 more
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Simultaneous Effect of Suction and Cavity for Controlling Flow Separation on NACA 0012 Airfoil – CFD Approach
TL;DR: In this article, a Computational Fluid Dynamics (CFD) investigation is carried out for analyzing the simultaneous effect of suction and cavity for controlling flow separation on NACA 0012 airfoil.
References
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Journal ArticleDOI
Separation control mechanism of airfoil using synthetic jet
TL;DR: In this article, a numerical simulation of separation control using a synthetic jet was performed on NACA23012 airfoil, and the results showed that stall characteristics and control surface performance could be improved substantially by resizing the separation vortices.
Journal ArticleDOI
Vortex capturing vertical axis wind turbine
TL;DR: In this article, an analytical-numerical study is presented for an innovative lift vertical axis turbine whose blades are designed with vortex trapping cavities that act as passive flow control devices.
Discussion of DNS: Past, Present, and Future
TL;DR: This paper covers the review, status, and projected future of direct numerical simulation methodology relative to the state-of-the-art in computer technology, numerical methods, and the trends in fundamental research programs.
Lift enhancement on unconventional airfoils
TL;DR: In this paper, the ability of vortex trapping on airfoils with surface discontinuities, such as cavities, corrugations, or a rotating cylinder, was explored.
Journal ArticleDOI
A thick symmetrical aerofoil oscillating about zero incidence angle
S. Raghunathan,O.O. Ombaka +1 more
TL;DR: In this paper, an experimental investigation on a NACA 0018 aerofoil oscillating about mean incidence angle of 0° with amplitude of 16° was carried out and the results showed an increase in incidence angle at which stall occurs, in maximum lift coefficient, and in the extent of hysteresis loop, with increase in reduced frequency.