Effects of wing shape, aspect ratio and deviation angle on aerodynamic performance of flapping wings in hover

2016 ◽  
Vol 28 (11) ◽  
pp. 111901 ◽  
Author(s):  
Aamer Shahzad ◽  
Fang-Bao Tian ◽  
John Young ◽  
Joseph C. S. Lai
Keyword(s):  
Aspect Ratio ◽  
Aerodynamic Performance ◽  
Wing Shape ◽  
Flapping Wings ◽  
Deviation Angle

Effects of flexibility and aspect ratio on the aerodynamic performance of flapping wings

2018 ◽  
Vol 13 (3) ◽  
pp. 036001 ◽  
Author(s):  
Junjiang Fu ◽  
Xiaohui Liu ◽  
Wei Shyy ◽  
Huihe Qiu
Keyword(s):  
Aspect Ratio ◽  
Aerodynamic Performance ◽  
Flapping Wings

scholarly journals Wing shape evolution in bombycoid moths reveals two distinct strategies for maneuverable flight

2020 ◽  
Author(s):  
Brett R. Aiello ◽  
Usama Bin Sikandar ◽  
Hajime Minoguchi ◽  
Katalina C. Kimball ◽  
Chris A. Hamilton ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Life Histories ◽  
Aerodynamic Performance ◽  
Wing Shape ◽  
Flapping Wings ◽  
Shape Evolution ◽  
Wingbeat Frequency ◽  
Multiple Strategies ◽  
Agile Flight

A wide diversity of wing shapes has evolved, but how is aerodynamic strategy coupled to morphological variation? Here we examine how wing shape has evolved across a phylogenetic split between hawkmoths (Sphingidae) and wild silkmoths (Saturniidae), which have divergent life histories, but agile flight behaviors. Combined with kinematics of exemplar species, we find that these two diverse sister families have evolved two distinct strategies for agile flight. Each group has evolved distinct wing shapes in phylogenetic PCA-space. The notoriously agile hawkmoths have not evolved wing shapes typical of maneuverability, but rather ones that reduce power. Instead their kinematics favor maneuverability, primarily through higher wingbeat frequency. In contrast, silkmoths evolved maneuverable wing shapes and use kinematics that reduce power. Therefore, multiple strategies have evolved to achieve similar aerodynamic performance. We suggest flapping wings provide flexible aerodynamics through kinematics and might release morphological constraints, enabling the diversity of wing shapes across extant flyers.

Induced Strain Actuation for Solid-State Ornithopters: An Aeroelastic Study

2018 ◽  
Author(s):  
Francis Hauris ◽  
Onur Bilgen
Keyword(s):  
Reynolds Number ◽  
Solid State ◽  
Aspect Ratio ◽  
Interaction Model ◽  
Flapping Wing ◽  
Flapping Wings ◽  
Structural Behavior ◽  
Structure Interaction ◽  
Dynamic Motion ◽  
Lift And Drag

This paper investigates the dynamic aeroelastic behavior of strain actuated flapping wings with various geometries and boundary conditions. A fluid-structure interaction model of a plate-like flapping wing is developed. Assuming a chord Reynolds number of 100,000, the wing is harmonically actuated while varying parameters such as aspect ratio and wing root clamped percentage. Characteristic metrics for the dynamic motion, natural frequency, lift and drag are developed. These results are compared with purely structural behavior to understand the aeroelastic effects.

Sign in / Sign up

Export Citation Format

Share Document