Author: M. J. WerlePublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 29
Book Description
Effect of Free-stream Vorticity on Boundary-layer Stability
Author: M. J. WerlePublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 29
Book Description
Effect of Free-stream Vorticity on Boundary-layer Stability [by] M.J. Werle, D.T. Mook and H. Tang
![Effect of Free-stream Vorticity on Boundary-layer Stability [by] M.J. Werle, D.T. Mook and H. Tang PDF](https://books.google.com/books/content/images/frontcover/jYsScgAACAAJ?fife=w80-h100)
Author: M. J. WerlePublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 29
Book Description
Effect of Free Stream Vorticity on Laminar Boundary Layer Characteristics
Author: William Anthony MeyerPublisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Stability of Time Dependent and Spatially Varying Flows
Author: D.L. DwoyerPublisher: Springer Science & Business Media
ISBN: 1461247241
Category : Science
Languages : en
Pages : 361
Book Description
This volume is the collection of papers presented at the workshop on 'The Stability of Spatially Varying and Time Dependent Flows" sponsored by the Institute for Computer Applications in Science and Engineering (lCASE) and NASA Langley Research Center (LaRC) during August 19- 23, 1985. The purpose of this workshop was to bring together some of the experts in the field for an exchange of ideas to update the current status of knowledge and to help identify trends for future research. Among the invited speakers were D.M. Bushnell, M. Goldstein, P. Hall, Th. Herbert, R.E. Kelly, L. Mack, A.H. Nayfeh, F.T. Smith, and C. von Kerczek. The contributed papers were by A. Bayliss, R. Bodonyi, S. Cowley, C. Grosch, S. Lekoudis, P. Monkewitz, A. Patera, and C. Streett. In the first article, Bushnell provides a historical background on laminar flow control (LFC) research and summarizes the crucial role played by stability theory in LFC system design. He also identifies problem areas in stability theory requiring further research from the view-point of ap plications to LFC design. It is an excellent article for theoreticians looking for some down-to-earth applications of stability theory.
Stability of Parallel Flows
Author: R. BetchovPublisher: Elsevier
ISBN: 0323162606
Category : Science
Languages : en
Pages : 345
Book Description
Stability of Parallel Flows provides information pertinent to hydrodynamical stability. This book explores the stability problems that occur in various fields, including electronics, mechanics, oceanography, administration, economics, as well as naval and aeronautical engineering. Organized into two parts encompassing 10 chapters, this book starts with an overview of the general equations of a two-dimensional incompressible flow. This text then explores the stability of a laminar boundary layer and presents the equation of the inviscid approximation. Other chapters present the general equations governing an incompressible three-dimensional flow, which requires the massive use of a computer. This book discusses as well the experimental studies on the oscillations of the boundary layer wherein the mean flow is affected by the presence of oscillations. The final chapter describes the concept of the stability of turbulent flows found in boundary layers, wakes, and jets. This book is a valuable resource for physicists, mathematicians, engineers, scientists, and researchers.
Boundary-layer Stability Theory
Author: Leslie M. MackPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 406
Book Description
A Mehod for the Prediction of the Effects of Free-stream Disturbances on Boundary-layer Transition
Author: J. A. BenekPublisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 34
Book Description
A semiempirical expression for boundary-layer transition location is developed based on the concept of a critical ratio of inertial to viscous shearing stresses at laminar breakdown. Extensive comparisons between predicted and measured transition locations on a 10-deg included-angle cone at transonic speeds are shown with the data predicted to within 10%. Comparisons are also made with low subsonic and supersonic data which indicate the method is extendible to these flow regimes. (Author).
NASA Technical Paper
Author: Experimental Study of the Effect of Streamwise Vortices on Unsteady Turbulent Boundary-layer Separation
Author: W. W. HumphreysPublisher:
ISBN:
Category :
Languages : en
Pages : 296
Book Description
This experiment studied the effect of streamwise vortices on unsteady turbulent boundary-layer separation. The objectives were to document the flow field, to characterize the time response of the boundary layer, and to understand the actual mechanisms by which the streamwise vortices modify boundary-layer behavior. A new configuration for non-obtrusive three-component Laser Doppler Anemometry (LDA) determined the phase averaged velocity and Reynolds stress components, in an unsteady water tunnel, at a momentum thickness Reynolds number of 1840. The streamwise vortices were created by three pairs of half-delta wing vortex generators, while the boundary-layer separation was controlled through impulsively initiated opposite-wall suction, which created a strong adverse pressure gradient. The time response of the freestream velocity demonstrates that convection is the primary mechanism by which vortex generators modify the response of the boundary layer. There is an initial fast response throughout the boundary layer which is unaffected by the presence of vortex generators, followed by a slow or convective response, the magnitude of which is substantially modified by the presence of the vortex generators. Flow control, Unsteady turbulent layers. Aircraft, Vortex generators. (jes).
Receptivity of Flat-Plate Boundary Layer in a Non-Uniform Free Stream (Vorticity Normal to the Plate)
Author: Mikhail Naumovich KoganPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 84
Book Description