Camber morphing winglet influence on aircraft drag breakdown and tip vortex structure

2021 ◽  
Vol 119 ◽  
pp. 107148
Author(s):  
João Paulo Eguea ◽  
Pedro David Bravo-Mosquera ◽  
Fernando Martini Catalano
Keyword(s):  
Vortex Structure ◽  
Tip Vortex

307 Tip Vortex Structure of Open Axial Rotor

2000 ◽  
Vol 005.2 (0) ◽  
pp. 81-82
Author(s):  
Kouhei Fujimoto ◽  
Wen-Xin Cai ◽  
Norimasa Shiomi ◽  
Kenji Kaneko ◽  
Toshiaki Setoguchi
Keyword(s):  
Vortex Structure ◽  
Tip Vortex

Numerical Study of the Tip Clearance Flow Development in a Propulsion Pump Stage

1996 ◽  
Author(s):  
Yu-Tai Lee ◽  
Chunill Hah ◽  
James Loellbach
Keyword(s):  
Vortex Structure ◽  
Stokes Equations ◽  
Numerical Study ◽  
Three Dimensional ◽  
Tip Clearance ◽  
Tip Vortex ◽  
Navier Stokes ◽  
Tip Clearance Flow ◽  
Clearance Flow ◽  
High Reynolds

This paper summarizes a numerical investigation of the fundamental structure of the rotor tip-clearance vortex and its interaction with a passage trailing-edge vortex in a single-stage stator-rotor pump. The flow field of a highly-loaded rotor measured in a high Reynolds number pump facility (HIREP) is used for comparison. The numerical solution was obtained by solving the three-dimensional Reynolds averaged Navier-Stokes equations. The calculated results are visualized in order to understand the details of the tip-vortex structure. The study shows that the tip geometry should be accurately represented to predict the tip-vortex structure correctly.

Alteration of the tip vortex structure of a hovering rotor by blowing

1999 ◽  
Author(s):  
Zhijian Liu ◽  
Lakshmi Sankar ◽  
Ahmed Hassan
Keyword(s):  
Vortex Structure ◽  
Tip Vortex

scholarly journals Numerical Investigation of a Dynamic Stall on a Single Rotating Blade

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 90
Author(s):  
Yin Ruan ◽  
Manfred Hajek
Keyword(s):  
Numerical Investigation ◽  
Vortex Structure ◽  
Leading Edge ◽  
Rotor Blades ◽  
Tip Vortex ◽  
Dynamic Stall ◽  
Leading Edge Vortex ◽  
Pitching Airfoil ◽  
Edge Vortex ◽  
High Reynolds

Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a numerical investigation of a single rotating and pitching blade is carried out. The flow phenomena thereupon including the Ω-shaped dynamic stall vortex, the interaction of the leading edge vortex with the tip vortex, and a newly noticed vortex structure originating inboard are examined; they show similarities to pitching wings, while also possessing their unique features of a rotating system. The leading edge/tip vortex interaction dominates the post-stall stage. A newly noticed swell structure is observed to have a great impact on the load in the post-stall stage. With such a high Reynolds number, the Coriolis force exerted on the leading edge vortex is negligible compared to the pressure force. The force history/vortex structure of the slice r/R = 0.898 is compared with a 2D pitching airfoil with the same harmonic pitch motion, and the current simulation shows the important role played by the swell structure in the recovery stage.

Effect of winglets induced tip vortex structure on the performance of subsonic wings

2016 ◽  
Vol 58 ◽  
pp. 328-340 ◽  
Author(s):  
Gautham Narayan ◽  
Bibin John
Keyword(s):  
Vortex Structure ◽  
Tip Vortex

Computational Analysis of a Tip Vortex Structure Shed from a Bio-inspired Blade

2014 ◽  
Author(s):  
Sebastian Gomez ◽  
Lindsay Gilkey ◽  
Bryan Kaiser ◽  
Svetlana Poroseva
Keyword(s):  
Vortex Structure ◽  
Computational Analysis ◽  
Tip Vortex

scholarly journals Effect of tip vortex structure on helicopter noise due to blade-vortex interaction

1980 ◽  
Vol 17 (10) ◽  
pp. 705-711 ◽  
Author(s):  
Sheila E. Widnall ◽  
Thomas L. Wolf
Keyword(s):  
Vortex Structure ◽  
Tip Vortex ◽  
Vortex Interaction ◽  
Helicopter Noise ◽  
Blade Vortex Interaction
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