Effect of Nature-Inspired Needle-Shaped Vortex Generators on the Aerodynamic Features of a Double-Delta Wing

2021 ◽  
pp. 106502
Author(s):  
Hamed Khodabakhshian Naeini ◽  
Mahdi Nili-Ahmadabadi ◽  
Yoon Seong Park ◽  
Kyung Chun Kim
Keyword(s):  
Delta Wing ◽  
Vortex Generators ◽  
Double Delta Wing

Diamond, cropped, delta, and double-delta wing vortex breakdown during dynamic pitching

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 567-569
Author(s):  
Roy Y. Myose ◽  
Boon-Kiat Lee ◽  
Shigeo Hayashibara ◽  
L. S. Miller
Keyword(s):  
Vortex Breakdown ◽  
Delta Wing ◽  
Double Delta Wing

Experimental Investigation of Vortex-Tail Interaction on a 76/40 Degree Double-Delta Wing

1999 ◽  
Author(s):  
Terence A. Ghee ◽  
Hugo A. Gonzalez ◽  
David B. Findlay
Keyword(s):  
Experimental Investigation ◽  
Delta Wing ◽  
Double Delta Wing

Effects of Various Shape Fillets on a 76/40 Double Delta Wing from Mach 0.18 to 0.7

1994 ◽  
Author(s):  
Hugo Gonzalez ◽  
Gary Erickson ◽  
Blair McLachlan ◽  
James Bell
Keyword(s):  
Delta Wing ◽  
Double Delta Wing

scholarly journals Numerical investigation of unsteady vortex breakdown past 80°/65° double-delta wing

2014 ◽  
Vol 27 (3) ◽  
pp. 521-530 ◽  
Author(s):  
Jian Liu ◽  
Haisheng Sun ◽  
Zhitao Liu ◽  
Zhixiang Xiao
Keyword(s):  
Numerical Investigation ◽  
Vortex Breakdown ◽  
Delta Wing ◽  
Double Delta Wing

Numerical Investigations for the Effect of Slender Body on Dynamic Rolling Characteristics of a 80°/60° Double Delta Wing

2013 ◽  
Vol 444-445 ◽  
pp. 286-292
Author(s):  
Bing Han ◽  
Min Xu ◽  
Xi Pei ◽  
Xiao Min An
Keyword(s):  
Stokes Equations ◽  
Delta Wing ◽  
Time Lag ◽  
Slender Body ◽  
Vortical Flow ◽  
Navier Stokes ◽  
Rolling Motion ◽  
Navier Stokes Equations ◽  
Lag Effect ◽  
Double Delta Wing

The effect of slender body on the rolling characteristics of a double delta wing is found by comparing the numerical simulation results of the double delta wing and wing-body configuration. The coupled computation system solving the Navier-Stokes equations and the rolling motion equation alternatively to obtain the unsteady vortical flow around the two configurations while rolling. The results conclusively showed the upwash effect of the slender body enhanced the energy of strake vortex and merged vortex.The aerodynamic lag of double delta wing is weak, contrarily, the time lag effect of the wing-body configuration is significant. The asymmetry vortices structure nearby the trailing edge are believed to be the main reason for the unsteady time lag effect.

Generation of Longitudinal Streamwise Vortices—A Device for Improving Heat Exchanger Design

1994 ◽  
Vol 116 (3) ◽  
pp. 588-597 ◽  
Author(s):  
G. Biswas ◽  
P. Deb ◽  
S. Biswas
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Delta Wing ◽  
Rectangular Channel ◽  
Point Of View ◽  
Vortex Generators ◽  
Pair Type ◽  
Longitudinal Vortices ◽  
Flat Surfaces ◽  
Heat Exchanger Design

Laminar flow and heat transfer characteristics in a rectangular channel, containing built-in vortex generators of both the slender delta-wing and winglet-pair type, have been analyzed by means of solution of the full Navier–Stokes and energy equations. Each wing or winglet pair induces the creation of streamwise longitudinal vortices behind it. The spiraling flow of these vortices serves to entrain fluid from their outside into their core. These vortices also disrupt the growth of the thermal boundary layer and serve ultimately to bring about the enhancement of heat transfer between the fluid and the channel walls. The geometric configurations considered in the study are representative of single elements of either a compact gas-liquid fin-tube crossflow heat exchanger or a plate-fin crossflow heat exchanger. Physically, these vortex generators can be mounted on the flat surfaces of the above-mentioned heat exchangers by punching or embossing the flat surfaces. They can also act as spacers for the plate fins. Because of the favorable pressure gradient in the channel, the longitudinal vortices are stable and their influence persists over an area many times the area of the slender vortex generators. From a heat transfer point of view, the delta-wing generator is found to be more effective than the winglet-pair. However, most convective heat transfer processes encounter two types of loss, namely, losses due to fluid friction and those due to heat transfer across finite temperature gradient. Because these two phenomena are manifestations of irreversibility, an evaluation of the augmentation techniques is also made from a thermodynamic viewpoint. Conclusions that are drawn thus include discussion about the influence of vortex generators (wings/winglets) on irreversibility.

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