Aero-elastic Analysis of High Aspect Ratio UAV Wing—Based on Two-Way Fluid Structure Interaction

2021 ◽  
pp. 37-58
Author(s):  
Vidit Sharma ◽  
S. Keshava Kumar
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Fluid Structure Interaction ◽  
Elastic Analysis ◽  
Fluid Structure ◽  
Structure Interaction

FLUID-STRUCTURE INTERACTION ANALYSIS OF A HIGH-ASPECT-RATIO WING CONSIDERING STRUCTURAL NONLINEARITY

2009 ◽  
Vol 23 (03) ◽  
pp. 445-448
Author(s):  
KYUNG-SEOK KIM ◽  
IN-GYU LIM ◽  
IN LEE ◽  
JAE-HAN YOO
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Large Deflection ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Inverse Transformation ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Structural Nonlinearity ◽  
Interaction Problem

In this research, fluid-structure interaction problem including geometric structural nonlinearity is studied for a high-aspect-ratio wing. When a high-aspect-ratio wing structure is interacted with external airload, geometric structural nonlinearity can be caused by large deflection of a wing. For the investigation of such a fluid-structure interaction problem, the transonic small disturbance theory for the aerodynamic analysis and the large deflection beam theory for the structural analysis are used, respectively. For the coupling between fluid and structure, the transformation of a displacement from the structural mesh to the aerodynamic grid is performed by a shape function which is used for the finite element and the inverse transformation of force by work equivalent load method. Static deformations in the vertical and twist deflections caused by gravity loading are compared with experimental results. Also, static aeroelastic analysis results are compared with experimental data. From the analysis results, effects of structural nonlinearity on static aeroelastic characteristics are investigated.

Experimental analysis of fluid-structure interaction in flexible wings at low Reynolds number flows

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mustafa Serdar Genç ◽  
Hacımurat Demir ◽  
Mustafa Özden ◽  
Tuna Murat Bodur
Keyword(s):  
Reynolds Number ◽  
Aspect Ratio ◽  
Fluid Structure Interaction ◽  
Leading Edge ◽  
Flexible Wings ◽  
Flexible Membrane ◽  
Fluid Structure ◽  
Content Type ◽  
Structure Interaction ◽  
Membrane Deformations

Purpose The purpose of this exhaustive experimental study is to investigate the fluid-structure interaction in the flexible membrane wings over a range of angles of attack for various Reynolds numbers. Design/methodology/approach In this paper, an experimental study on fluid-structure interaction of flexible membrane wings was presented at Reynolds numbers of 2.5 × 104, 5 × 104 and 7.5 × 104. In the experimental studies, flow visualization, velocity and deformation measurements for flexible membrane wings were performed by the smoke-wire technique, multichannel constant temperature anemometer and digital image correlation system, respectively. All experimental results were combined and fluid-structure interaction was discussed. Findings In the flexible wings with the higher aspect ratio, higher vibration modes were noticed because the leading-edge separation was dominant at lower angles of attack. As both Reynolds number and the aspect ratio increased, the maximum membrane deformations increased and the vibrations became visible, secondary vibration modes were observed with growing the leading-edge vortices at moderate angles of attack. Moreover, in the graphs of the spectral analysis of the membrane displacement and the velocity; the dominant frequencies coincided because of the interaction of the flow over the wings and the membrane deformations. Originality/value Unlike available literature, obtained results were presented comparatively using the sketches of the smoke-wire photographs with deformation measurement or turbulence statistics from the velocity measurements. In this study, fluid-structure interaction and leading-edge vortices of membrane wings were investigated in detail with increasing both Reynolds number and the aspect ratio.

scholarly journals Effects of Aspect Ratio in Moulded Packaging Considering Fluid/Structure Interaction: A CFD Modelling Approach

2017 ◽  
Vol 10 (6) ◽  
pp. 1799-1811 ◽  
Author(s):  
M. H. H. Ishak ◽  
M. Z. Abdullah ◽  
M. S. Abdul Aziz ◽  
A. Abas ◽  
W. K. Loh ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Fluid Structure Interaction ◽  
Cfd Modelling ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Modelling Approach

FLUID STRUCTURE INTERACTION OF ROWING BLADE FOR HYDRODYNAMIC PROPULSION TO ENHANCE ROWING PERFORMANCE

2014 ◽  
Author(s):  
Abdul Aziz Mohd. Yusof ◽  
◽  
Ardiyansyah Syahrom ◽  
M. N. Harun ◽  
A. H. Omar
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Rowing Performance
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