Experimental and Numerical Analysis of the Aerodynamic and Aeroacoustic Properties of a 2D High-Lift Wing Model

2018 ◽  
Author(s):  
Lourenço T. Lima Pereira ◽  
Laura Botero ◽  
Matheus T. de Araujo ◽  
Fernando Catalano ◽  
Danillo C. Reis ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
High Lift ◽  
Wing Model

Numerical Study of Winglet Cant Angle Effect on Wing Performance at Low Reynolds Number

2013 ◽  
Vol 393 ◽  
pp. 366-371
Author(s):  
C.F. Mat Taib ◽  
Abdul Aziz Jaafar ◽  
Salmiah Kasolang
Keyword(s):  
Reynolds Number ◽  
Numerical Analysis ◽  
Numerical Study ◽  
Low Reynolds Number ◽  
Lift Coefficient ◽  
Wing Model ◽  
Low Reynolds ◽  
Wing Performance ◽  
Drag Ratio ◽  
Lift To Drag Ratio

The study on the effect of winglet shape in wing design has been a focus of many researchers. Nevertheless, the effect of cant angle on the wing performances at low Reynolds number has not been fully explored. This paper describes the effect of a single semi-circular shaped winglet attached with a rectangular wing model to lower the drag without increasing the span of the wing. Aerodynamic characteristics for the rectangular wing (NACA 65-3-218) with and without semi-circular winglets have been studied using STAR CCM+ 4.0. This numerical analysis is based on Finite Volume Approach. Simulations were carried out on the rectangular wing model with and without winglet at aspect ratio of 2.73 and Reynolds number of 0.16 x 10 6 for various angles of attack. From the numerical analysis, wing performance characteristics in terms of lift coefficient CL, drag coefficient CD, and lift-to-drag ratio, CL/CD were obtained. It was found that the addition of a semi-circular winglet has resulted in a larger lift curve slope and higher Lift-to-Drag ratio in comparison with the case of a wing without winglet. Further investigation has revealed that a wing with semi-circular winglet with cant angle of 45 degree has produced the best Lift-to-Drag ratio, CL/CD.

Effect of Initial Value in Numerical Analysis Using Cartesian Mesh for High-Lift Airfoil

2019 ◽  
Vol 2019.56 (0) ◽  
pp. H023
Author(s):  
Yusuke SHIKADA ◽  
Tsubasa IWAFUNE ◽  
Masato OKAMOTO ◽  
Daisuke SASAKI ◽  
Takaya KOJIMA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Initial Value ◽  
High Lift ◽  
Cartesian Mesh

Noise Generation Characteristics of a High-lift Swept and Tapered Wing Model

2013 ◽  
Author(s):  
Yuzuru Yokokawa ◽  
Mitsuhiro Murayama ◽  
Yasushi Ito ◽  
Hiroki Ura ◽  
Dong-Youn Kwak ◽  
...  
Keyword(s):  
Noise Generation ◽  
High Lift ◽  
Wing Model

Unsteady aerodynamics of dragonfly using a simple wing–wing model from the perspective of a force decomposition

2010 ◽  
Vol 663 ◽  
pp. 233-252 ◽  
Author(s):  
CHENG-TA HSIEH ◽  
CHUN-FEI KUNG ◽  
CHIEN C. CHANG ◽  
CHIN-CHOU CHU
Keyword(s):  
Insect Flight ◽  
Unsteady Aerodynamics ◽  
Mass Effect ◽  
Reynolds Numbers ◽  
Life Cycles ◽  
Many Body ◽  
High Lift ◽  
Wing Motion ◽  
Wing Model ◽  
Force Decomposition

Insects perform their multitude of flight skills at frequencies of tens to hundreds of Hertz, and the aerodynamics of these skills are fundamentally unsteady. Intuitively, unsteadiness may come from unsteady wing motion, unsteady surface vorticity or vorticity being shed into the rear and front wakes. In this study, we propose to investigate the aerodynamics of dragonfly using a simplified wing–wing model from the perspective of many-body force decomposition and the associated force elements. Insect flight usually operates at Reynolds numbers of the order of several hundreds, at which the surface vorticity is shown to play a substantial role. There are important cases where the added mass effect is non-negligible. Nevertheless, the major contribution to the forces comes from the vorticity within the flow. This study focused on the effects of mutual interactions due to phase differences between the fore- and hindwings in the translational as well as rotational motions. It is well known that the dynamic stall vortex is an important mechanism for an unsteady wing to gain lift. In analysing the life cycles of lift and thrust elements, we also associate some high lift and thrust with the mechanisms identified as ‘riding on’ lift elements, ‘driven by’ thrust elements and ‘sucked by’ thrust elements, by which a wing makes use of a shed or fused vortex below, in front of, and behind it, respectively. In addition, a shear layer attaching to each wing may also provide significant thrust elements.

Investigation of Noise Generation from Bluff Flap Side-edge of a High-Lift Wing Model

2014 ◽  
Vol 12 (APISAT-2013) ◽  
pp. a9-a16
Author(s):  
Mitsuhiro MURAYAMA ◽  
Yuzuru YOKOKAWA ◽  
Kazuomi YAMAMOTO ◽  
Hiroki URA ◽  
Taro IMAMURA ◽  
...  
Keyword(s):  
Noise Generation ◽  
High Lift ◽  
Side Edge ◽  
Wing Model

Study on Noise Generation from Slat Tracks Using a High-Lift Wing Model

2015 ◽  
Author(s):  
Mitsuhiro Murayama ◽  
Yuzuru Yokokawa ◽  
Yasushi Ito ◽  
Kazuomi Yamamoto ◽  
Takehisa Takaishi ◽  
...  
Keyword(s):  
Noise Generation ◽  
High Lift ◽  
Wing Model
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