Numerical and experimantal analysis of flapping motion

Download

index.pdf

Date

2007

Author

Sarıgöl, Ebru

Metadata

Show full item record

Item Usage Stats

248
views

288
downloads

The aerodynamics of two-dimensional and three-dimensional flapping motion in hover is analyzed in incompressible, laminar flow at low Reynolds number regime. The aim of this study is to understand the physics and the underlying mechanisms of the flapping motion using both numerical tools (Direct Numerical Simulation) and experimental tools (Particle Image Velocimetry PIV technique). Numerical analyses cover both two-dimensional and three-dimensional configurations for different parameters using two different flow solvers. The obtained results are then analyzed in terms of aerodynamic force coefficients and vortex dynamics. Both symmetric and cambered airfoil sections are investigated at different starting angle of attacks. Both numerical and experimental simulations are carried out at Reynolds number 1000. The experimental analysis is carried out using Particle Image Velocimetry (PIV) technique in parallel with the numerical tools. Experimental measurements are taken for both two-dimensional and three-dimensional wing configurations using stereoscopic PIV technique.

Subject Keywords

Aerodynamics.

URI

http://etd.lib.metu.edu.tr/upload/12608613/index.pdf
https://hdl.handle.net/11511/17266

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Aerodynamic parameter estimation of a supersonic missile with rapid speed variation by using kalman filtering Bayoğlu, Tuğba; Kutay, Ali Türker; Department of Aerospace Engineering (2016) This study aims to develop an approach for the aerodynamic parameter estimation problem for supersonic air to air missile with rapid speed variation, as well as large variation of aerodynamic parameters with respect to Mach number. In literature, most of the estimation techniques require that estimator is time independent. Therefore, most of the aerodynamic parameter estimation methods are applied for air vehicles which have control over their speed or which can operate at relatively constant Mach number so...
Aeroservoelastic Modelling and Analysis of a Missile Control Surface with a Nonlinear Electromechanical Actuator Mehmet Ozan, Nalcı; Kayran, Altan (null; 2014-06-16) In this study, aeroservoelastic modeling and analysis of a missile control surface which is operated and controlled by a power limited, nonlinear electromechanical actuator is performed. Linear models of the control fin structure and aerodynamics together with the nonlinear servo-actuation system are built and integrated. The resulting aeroservoelastic system is analyzed both in time and frequency domain. Structural model of the control fin is based on the finite element model of the fin. Aerodynamic model ...
Computational investigation of flow through a louvered inlet configuration Tuncer, İsmail Hakkı (2001-01-01) Viscous, subsonic flows through a flush louvered inlet configuration without inlet vanes are investigated using the overflow Navier-Stokes solver with overset grids. The variation of the mass flow rate through the engine intake as a function of intake pressure is assessed. The computed results show that the flow distortion and the pressure loss in the plenum chamber are significant, yet a sufficient amount of mass flow rate may be obtained at the expense of total pressure recovery.
Numerical Simulation of a Flexible X-Wing Flapping-Wing Micro Air Vehicle Deng, S.; Perçin, Mustafa; van Oudheusden, B. W.; Bijl, H.; Remes, B.; Xiao, T. (2017-07-01) Numerical simulations were performed to investigate the flowfield around a flexible flapping-wing micro air vehicle using an in-house-developed computational fluid dynamics solver. To include the dynamics of the flexible wings and its impact on the aerodynamic behavior of the micro air vehicle, the wing-deformation pattern during flapping was experimentally determined by a stereovision measurement. These data were subsequently interpolated to be employed as prescribed flapping kinematics in the numerical fl...
Aeroservoelastic analysis and robust controller synthesis for flutter suppression of air vehicle control actuation systems Akmeşe, Alper; Platin, Bülent Emre; Department of Mechanical Engineering (2006) Flutter is one of the most important phenomena in which aerodynamic surfaces become unstable in certain flight conditions. Since the 1930’s many studies were conducted in the areas of flutter prediction in design stage, research of design methods for flutter prevention, derivation and confirmation of flutter flight envelopes via tests, and in similar subjects for aircraft wings. With the use of controllers in 1960’s, studies on the active flutter suppression began. First the classical controllers were used....

Citation Formats

E. Sarıgöl, “Numerical and experimantal analysis of flapping motion,” Ph.D. - Doctoral Program, Middle East Technical University, 2007.