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Author : Jamey Darin Jacob
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (343 download)
Download or read book Experimental Investigation of the Trailing Vortex Wake of Rectangular Airfoils written by Jamey Darin Jacob and published by . This book was released on 1995 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Lindsey Bristol
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (433 download)
Download or read book An Experimental Investigation Into the Wake Vortex Roll-up of a Rectangular Airfoil written by Robert Lindsey Bristol and published by . This book was released on 1999 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. D. Jacob
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (1 download)
Download or read book Experimental Study of Complex Vortex Interactions in the Wake of High Aspect Ratio Wings written by J. D. Jacob and published by . This book was released on 1997 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeffrey S. Zsoldos
Publisher :
ISBN 13 :
Total Pages : 814 pages
Book Rating : 4.:/5 (264 download)
Download or read book An Experimental Investigation of Interacting Wing-tip Vortex Pairs written by Jeffrey S. Zsoldos and published by . This book was released on 1992 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mathew Bussière
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (89 download)
Download or read book The Experimental Investigation of Vortex Wakes from Oscillating Airfoils written by Mathew Bussière and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael S. Francis
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (457 download)
Download or read book An Experimental Investigation of Wing Trailing Vortex Formation written by Michael S. Francis and published by . This book was released on 1976 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Youxin Zheng
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (297 download)
Download or read book An Experimental Study of Wing Tip Vortex in the Near Wake of a Rectangular Wing written by Youxin Zheng and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zhengkai He
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (14 download)
Download or read book Study on the Vortex Wake of an Airfoil Equipped with Flexible Trailing Edge Fringes written by Zhengkai He and published by . This book was released on 2014 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the inspiration of owl's silent flight, a traditional airfoil S833 equipped with flexible fringes on the trailing edge is investigated through numerical simulation and experiments in a wind tunnel. The newly constructed airfoil is modeled and numerically investigated. An incompressible, 2D and viscous flow solver in the Computational Fluid Dynamics (CFD) software FLUENT is utilized to conduct the numerical simulation on the vortex flow feature in the wake of the airfoil. A User Defined Function code was applied to generate the defined motion of flexible fringes. The effects of the flapping frequency of the fringe and the deformation pattern of the fringe are investigated in the parametric study. On the other hand, the airfoil model with the flexible fringe is manufactured for the experimental study. A digital Particle Image Velocimetry (PIV) system is employed to investigate the flow structure in the wake and the deformation of the flexible fringes. The motion of the trailing edge fringes is extracted from the experimental measurements as the input for CFD simulation. It has been found that the addition of the flexible fringe has a significant effect on the flow characteristics in the vortex wake downstream of the airfoil as well as the aerodynamic performance of the airfoil.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722220938
Total Pages : 42 pages
Book Rating : 4.2/5 (29 download)
Download or read book Experimental Study of a Vortex Subjected to Imposed Strain written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental project was undertaken to investigate the character of vortex breakdown with particular regard to the waveguide theories of vortex breakdown. A rectangular wing based on the NACA 0012 airfoil was used to produce a trailing vortex which convected downstream without undergoing breakdown. Dye marked the vortex location. A disturbance was then introduced onto the vortex using a small moving wire to 'cut' the vortex. The development of upstream and downstream propagating disturbance waves was observed and the propagation velocities measured. The downstream traveling wave produced a structure similar in appearance to a vortex breakdown. The upstream wave produced a moving, swirling, turbulent region that was not a vortex breakdown. The waves moving in either direction have the same swirl velocity profiles but quite different axial velocity profiles. The upstream disturbance (turbulence) moved into a flow with an axial velocity profile that had a wake-like defect in the core region. The downstream moving vortex breakdown moved into a flow with a jet-like overshoot in the core region. The fact that no breakdown was observed for the wake-like defect and breakdown was observed for the jet-like overshoot is not consistent with computational fluid dynamics (CFD) calculations. Although there are not a lot of examples, CFD results show breakdown for both types of profiles. The longitudinal and swirl velocity profiles were documented by Laser Doppler Velocimeter (LDV) measurement. Wave velocities, swirl angles, and swirl parameters are reported. Panton, Ronald L. and Stifle, Kirk E. Unspecified Center NAG2-389...
Author :
Publisher :
ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Advisory Committee for Aeronautics
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.F/5 ( download)
Download or read book Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1957 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jason Marc Ortega
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.:/5 (35 download)
Download or read book Three-dimensional Trainling Vortex Structure in the Near Wake of a Rectangular Airflow written by Jason Marc Ortega and published by . This book was released on 1998 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher E. Mertes
Publisher :
ISBN 13 : 9781267424235
Total Pages : 87 pages
Book Rating : 4.4/5 (242 download)
Download or read book Dynamic Wake Studies of a Flatback Airfoil written by Christopher E. Mertes and published by . This book was released on 2012 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted to characterize the effects of pitching motion on vortex shedding behavior in the wake of a flatback airfoil. Experiments were conducted on a static, rigidly mounted airfoil as well as an oscillating airfoil in a wind tunnel facility at the University of Wyoming. Particle image velocimetry was used in conjunction with proper orthogonal decomposition to show that the vortex shedding does behave differently depending on the dynamic configuration of the airfoil. The results show that fundamental vortex shedding from the blunt trailing edge is present in both the static and dynamic case whenever the flow is attached. In a case where the flow separates under dynamic stall conditions, the flow physics are dominated by the dynamic pitching motion, and trailing edge vortex shedding is only present during the attached portion of the pitching cycle. In another case, it was shown that the organization of the vortex shedding changes depending on the point in the oscillation cycle. This dynamic behavior has an impact on the aerodynamic characteristics of the blade.An experimental study was conducted to characterize the effects of pitching motion on vortex shedding behavior in the wake of a flatback airfoil. Experiments were conducted on a static, rigidly mounted airfoil as well as an oscillating airfoil in a wind tunnel facility at the University of Wyoming. Particle image velocimetry was used in conjunction with proper orthogonal decomposition to show that the vortex shedding does behave differently depending on the dynamic configuration of the airfoil. The results show that fundamental vortex shedding from the blunt trailing edge is present in both the static and dynamic case whenever the flow is attached. In a case where the flow separates under dynamic stall conditions, the flow physics are dominated by the dynamic pitching motion, and trailing edge vortex shedding is only present during the attached portion of the pitching cycle. In another case, it was shown that the organization of the vortex shedding changes depending on the point in the oscillation cycle. This dynamic behavior has an impact on the aerodynamic characteristics of the blade.
Author : A.S. Ginevsky
Publisher : Springer Science & Business Media
ISBN 13 : 3642017606
Total Pages : 166 pages
Book Rating : 4.6/5 (42 download)
Download or read book Vortex wakes of Aircrafts written by A.S. Ginevsky and published by Springer Science & Business Media. This book was released on 2009-07-07 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation of vortex wakes behind various aircraft, especially behind wide bodied and heavy cargo ones, is of both scientific and practical in terest. The vortex wakes shed from the wing’s trailing edge are long lived and attenuate only atdistances of10–12kmbehindthe wake generating aircraft. The encounter of other aircraft with the vortex wake of a heavy aircraft is open to catastrophic hazards. For example, air refueling is adangerous operationpartly due to thepossibility of the receiver aircraft’s encountering the trailing wake of the tanker aircraft. It is very important to know the behavior of vortex wakes of aircraft during theirtakeoff andlanding operations whenthe wakes canpropagate over the airport’s ground surface and be a serious hazard to other depart ing or arriving aircraft. This knowledge can help in enhancing safety of aircraft’s movements in the terminal areas of congested airports where the threat of vortex encounters limits passenger throughput. Theoreticalinvestigations of aircraft vortex wakes arebeingintensively performedinthe major aviationnations.Usedforthispurpose are various methods for mathematical modeling of turbulent flows: direct numerical simulation based on the Navier–Stokes equations, large eddy simulation using the Navier–Stokes equations in combination with subrigid scale modeling, simulation based on the Reynolds equations closed with a differential turbulence model. These approaches are widely used in works of Russian and other countries’ scientists. It should be emphasized that the experiments in wind tunnels and studies of natural vortex wakes behind heavy and light aircraft in flight experiments are equally important.
Author : Iraj Masbooghi Kalkhoran
Publisher :
ISBN 13 :
Total Pages : 157 pages
Book Rating : 4.:/5 (664 download)
Download or read book Experimental Investigation of the Perpendicular Vortex-airfoil Interaction at Transonic Speeds written by Iraj Masbooghi Kalkhoran and published by . This book was released on 1987 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Allen F. Donovan
Publisher : Princeton University Press
ISBN 13 : 1400879906
Total Pages : 863 pages
Book Rating : 4.4/5 (8 download)
Download or read book Aerodynamic Components of Aircraft at High Speeds written by Allen F. Donovan and published by Princeton University Press. This book was released on 2015-12-08 with total page 863 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume VII of the High Speed Aerodynamics and Jet Propulsion series. It deals with applications to specific components of the complete aircraft. Sections of the volume include: aerodynamics of wings at high speed, aerodynamics of bodies at high speed, interaction problems, propellers at high speed, diffusers and nozzles, and nonsteady wing characteristics. Originally published in 1957. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Author :
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.F/5 ( download)
Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1987 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
