scholarly journals Experimental Study about the Deformation and Aerodynamic Characteristics of the Passive Morphing Airfoil

2020 ◽  
Vol 63 (1) ◽  
pp. 18-23
Author(s):  
Kotaro TAGUCHI ◽  
Koh FUKUNISHI ◽  
Shogo TAKAZAWA ◽  
Yasuto SUNADA ◽  
Taro IMAMURA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Aerodynamic Characteristics ◽  
Passive Morphing

Aerodynamic Characteristics of a Deformable Membrane Aerofoil

2014 ◽  
Vol 553 ◽  
pp. 255-260
Author(s):  
Viktor Šajn ◽  
Igor Petrović ◽  
Franc Kosel
Keyword(s):  
Experimental Study ◽  
Reynolds Number ◽  
Wind Tunnel ◽  
Lift Coefficient ◽  
Fluid Structure Interaction ◽  
Angle Of Attack ◽  
Aerodynamic Characteristics ◽  
Relative Difference ◽  
Structure Interaction ◽  
Deformable Membrane

In the paper, numerical and experimental study of low Reynolds number airflow around the deformable membrane airfoil (DMA) is presented. Simulations of a fluid-structure interaction between the fluid and the DMA were performed. In the experiment, the DMA model was made from a thin PVC sheet, which was wrapped around the steel rod at the leading and trailing edge. Measurements were performed in a wind tunnel at a chord Reynolds number of 85.7·103, over the angle of attack range from 0° to 15° and DMA shortening ratio from 0.025 to 0.150. Simulations were in an agreement with the experiment, since the average relative difference of coefficient of lift was smaller than 7.3%. For the same value of Reynolds number, DMA shows improved lift coefficient Cy= 2.18, compared to standard rigid airfoils.

Passive Morphing Airfoil With Honeycombs

2011 ◽  
Author(s):  
Hyeonu Heo ◽  
Jaehyung Ju ◽  
Doo-Man Kim ◽  
Chang-Soo Jeon
Keyword(s):  
Shape Change ◽  
Fuel Efficiency ◽  
Aerodynamic Characteristics ◽  
Structural Performance ◽  
Element Analysis ◽  
Structural Shape ◽  
Aerodynamic Loads ◽  
Structure Interaction ◽  
Morphing Structure ◽  
Passive Morphing

A passive morphing may improve the aerodynamic characteristics through structural shape change by aerodynamic loads during the flight, resulting in improving fuel efficiency. The passive morphing structure should have a capability to be highly deformed while maintaining a sufficient stiffness in bending. Honeycombs may be good for controlling both stiffness and flexibility. This paper investigates a honeycomb airfoil’s static deformations through the fluid-structure interaction using computational fluid dynamics and structural finite element analysis. The structural performance will be investigated with varying honeycomb geometries including regular, auxetic and chiral meso-structures.

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