...Evren Geydirici; Kuzey C. Derman; Sertac Cadirci The design and optimization of propellers for unmanned aerial vehicles (UAVs) are essential for optimal performance and high efficiency. This study presents a numerical investigation of the aerodynamic performance of coaxial octocopters using...

...  =   2 and a 0 / c  =   0.5), the peak value of C L increased from 1.85 (rigid blade) to 3 (flexible blade) and the instantaneous moments increased from 0.25 to 0.4. Vortex stability and shedding at LE and TE is the reason behind such aerodynamic improvements. The flexible blade boosts the strength...

...Y. E. William; S. Kanagalingam; M. H. Mohamed The underlying physics ever behind the aerodynamics of an airfoil in ground effect (GE) are still not fully resolved. In this work, the aerodynamics for an airfoil in GE is investigated computationally for both transitional and turbulent flow regimes...

..., NY . [13] Chapman , D. , 1979 , “ Computational Aerodynamics Development and Outlook ,” AIAA J. , 17 ( 12 ), pp. 1293 – 1313 . 10.2514/3.61311 [14] Choi , H. , and Moin , P. , 2012 , “ Grid-Point Requirements for Large Eddy Simulation: Chapman's Estimates...

... aerodynamics computational fluid dynamics flow control flow simulation iterative methods ventilation vents (mechanical components) wind wind tunnels The ultimate goal of this research is to add unsteady multidimensional wind display to a VE and improve the sense of immersion for a VE user...

... of the Aerodynamic Derivatives of a Vehicle in Cross Wind Gusts ,” SAE International Congress and Exposition, Detroit, MI, SAE Paper No. 730232. 6 Garry , K. P. , and Cooper , K. R. , 1996 , “ Comparison of Quasi Static and Dynamic Wind-Tunnel Measurements on Simplified Tractor-Trailer Models ,” J...

...Mehmet N. Tomac; Kevin Yugulis; James W. Gregory; James Loftus; Tony Ferrito This work develops an understanding of the flow mechanisms that induce vibrations on automotive side view mirrors. The unsteady nature of the flow over side view mirrors causes unsteady aerodynamic load distributions...

..., and flow compressibility on the onset of stall. This approach also presents an analysis method that can be used to predict the stall of airfoils with alternative nose geometry. 16 01 2011 09 09 2011 09 09 2011 08 11 2011 08 11 2011 aerodynamics boundary layer turbulence...

... drop pore density dimensional analysis aerodynamics alumina ceramics flow simulation flow through porous media foams porosity silicon compounds viscosity 28 02 2011 20 09 2011 20 09 2011 08 11 2011 08 11 2011 2011 American Society of Mechanical...

...Martin O. L. Hansen; Helge Aagaard Madsen The paper describes the development and description of the aerodynamic models used to estimate the aerodynamic loads on wind turbine constructions. This includes a status of the capabilities of computation fluid dynamics and the need for reliable airfoil...

... of the wheel housing has an influence on flows on both the inside and the outside of the wheelhouse. 01 03 2011 30 08 2011 13 10 2011 13 10 2011 aerodynamics flow simulation Navier-Stokes equations numerical analysis rotational flow turbulence vortices wheels...

... optimization process is conducted with three design variables defining stagger angles at the hub, mid-span, and tip, and the second is conducted with five design variables defining hub-to-tip ratio, hub cap installation distance, hub cap ratio, and the stagger angles at the mid-span and tip. Two aerodynamic...

... section wall configurations were investigated, namely, geometrically straight walls (GSW), aerodynamically straight walls (ASW), and streamlined walls (SLW). The results show that solid blockage effects are evident in cylinder surface pressure distributions for the GSW and ASW configurations, manifested...

...Shun C. Yen; Yu F. Fei This study investigates the effects of Reynolds number, angle of attack, and winglet dihedral (δ) on the smoke-streak flow patterns, surface oil-flow configurations, and aerodynamic performance of the wingleted wings. The airfoil is NACA 0012 and the winglet dihedral varies...

... aerodynamics compressible flow flow simulation microchannel flow Poiseuille flow slip flow subsonic flow Table 1 Comparison of experimental data from Harley et al. [( 1 22 )] Case JH6 JH6 Width (μm) 96.6 96.6 Depth ( μ m) 0.51 0.51 D h ( μ m) 1.01 1.01 Length (mm...

...Graham Doig; Tracie J. Barber; Andrew J. Neely For inverted wings in close ground proximity, such as race car configurations, the aerodynamic ground effect can produce local velocities significantly greater than the freestream and the effects of compressibility may occur sooner than would...

... to the supply ports that could not be reproduced experimentally at an equivalent cost, the geometry most likely to alleviate the back-flow anomaly has been identified. 05 07 2010 03 02 2011 03 02 2011 16 05 2011 16 05 2011 aerodynamics computational fluid dynamics flow...

... and modeling approaches used for these applications and to develop physical understanding of the aerodynamics of gear windage loss. Several spur gear geometries are considered, for which experimental data are available. Various canonical shrouding configurations and free spinning (no shroud) cases are studied...

..., or serrations that have previously been used to reduce airfoil drag will also be considered. 06 06 2010 19 12 2010 04 02 2011 04 02 2011 aerodynamics aerospace components automotive components blades drag reduction fans Industrial fans are widely used for cooling...

... distortion as compared with counter-rotating inflow distortion. aerodynamics blades compressors fans flow measurement rotational flow turbomachinery wavelet transforms flow instability rotating stall static inflow distortion dynamic inflow distortion stall inception Stable...