Goertler Vortices In Growing Boundary Layers The Leading Edge Receptivity Problem Linear Growth And The Nonlinear Breakdown Stage
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Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 66 |
Release | : 2018-07-08 |
Genre | : |
ISBN | : 9781722420703 |
Download Goertler Vortices in Growing Boundary Layers Book in PDF, Epub and Kindle
Goertler vortices are thought to be the cause of transition in many fluid flows of practical importance. A review of the different stages of vortex growth is given. In the linear regime, nonparallel effects completely govern this growth, and parallel flow theories do not capture the essential features of the development of the vortices. A detailed comparison between the parallel and nonparallel theories is given and it is shown that at small vortex wavelengths, the parallel flow theories have some validity; otherwise nonparallel effects are dominant. New results for the receptivity problem for Goertler vortices are given; in particular vortices induced by free stream perturbations impinging on the leading edge of the walls are considered. It is found that the most dangerous mode of this type can be isolated and it's neutral curve is determined. This curve agrees very closely with the available experimental data. A discussion of the different regimes of growth of nonlinear vortices is also given. Again it is shown that, unless the vortex wavelength is small, nonparallel effects are dominant. Some new results for nonlinear vortices of 0(1) wavelengths are given and compared to experimental observations. Hall, Philip Unspecified Center...
Author | : Institute for Computer Applications in Science and Engineering |
Publisher | : |
Total Pages | : 80 |
Release | : 1989 |
Genre | : Aerodynamics |
ISBN | : |
Download Goertler Vortices in Growing Boundary Layers: The Leading Edge Receptivity Problem, Linear Growth and the Nonlinear Breakdown Stage Book in PDF, Epub and Kindle
Author | : Philip Hall |
Publisher | : |
Total Pages | : 0 |
Release | : 1989 |
Genre | : |
ISBN | : |
Download Görtler Vortices in Growing Boundary Layers: the Leading Edge Receptivity Problem, Linear Growth and the Nonlinear Breakdown Stage Book in PDF, Epub and Kindle
Author | : Institute for Computer Applications in Science and Engineering |
Publisher | : |
Total Pages | : 68 |
Release | : 1990 |
Genre | : |
ISBN | : |
Download On the Receptivity Problem for Goertler Vortices: Vortex Motions Induced by Wall Roughness Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 482 |
Release | : 1990 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 36 |
Release | : 1992 |
Genre | : |
ISBN | : |
Download On the Spatial Evolution of Long-wavelength Goertler Vortices Governed by a Viscous-inviscid Interaction Book in PDF, Epub and Kindle
Author | : Jie Ren |
Publisher | : Springer |
Total Pages | : 110 |
Release | : 2017-10-27 |
Genre | : Technology & Engineering |
ISBN | : 9811068321 |
Download Secondary Instabilities of Görtler Vortices in High-Speed Boundary Layers Book in PDF, Epub and Kindle
This thesis first reveals the mechanism of Görtler instabilities and then demonstrates how transitions at hypersonic flows can be effectively controlled (either promoted or suppressed) with Görtler or Klebanoff modes. It focuses on understanding and controlling flow transitions from mild laminar to fully turbulent flows at high speeds—aspects that have become crucial at the dawn of an incredible era, in which hypersonic vehicles are becoming available. Once this occurs, it will be possible to travel from Beijing to Los Angeles within just 2 hours, and we will all live in a genuinely global village—and not just virtually, but physically. Görtler instabilities have often been used to promote flow transition in hypersonic vehicles. However, how Görtler instabilities are excited and how they evolve in hypersonic flows are questions that have yet to be answered.
Author | : Institute for Computer Applications in Science and Engineering |
Publisher | : |
Total Pages | : 32 |
Release | : 1993 |
Genre | : |
ISBN | : |
Download On the Receptivity Problem for O(1) Wavelength Goertler Vortices Book in PDF, Epub and Kindle
Author | : Institute for Computer Applications in Science and Engineering |
Publisher | : |
Total Pages | : 32 |
Release | : 1992 |
Genre | : |
ISBN | : |
Download Fully Nonlinear Development of the Most Unstable Goertler Vortex in a Three Dimensional Boundary Layer Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1994 |
Genre | : Government publications |
ISBN | : |
Download Monthly Catalog of United States Government Publications Book in PDF, Epub and Kindle