Boundary-layer Receptivity to Three-dimensional Unsteady Vortical Disturbances in Free Stream PDF Download
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Author: Meelan Choudhari
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Meelan Choudhari
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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The investigation of mechanisms of excitation of the boundary-layer instability waves by various external perturbations represents an important aspect of the laminar-turbulent transition problem and has a crucial significance for both basic research of transition and practical applications. A review of recent studies in this field related to 3D receptivity problems for 2D and 3D boundary layers can be found. Most of previous experimental investigations were devoted to the receptivity to surface perturbations (roughness and vibrations) and to acoustic waves. Meanwhile, the excitation of instability waves by free-stream turbulence can also play a very important role and influence the transition process. The present paper is devoted to an experimental investigation of the 3D receptivity of Blasius boundary layer to non-stationary vortical free-stream disturbances due to their scattering on localized (in streamwise and spanwise directions) surface vibrations. There is only one available quantitative experimental study of a similar receptivity problem performed for unsteady free-stream vortices. A scattering of a weak vortex street (with 2D spanwise vorticity) on a localized two-dimensional surface roughness has been studied in this work in the Blasius flow. The results of this experiment were found to be in a good agreement with the 2D receptivity theory. Three-dimensional receptivity to non-stationary free-stream vortices has not been studied in previous experiments at all. The scattering of free-stream vortices on surface vibrations was not studied even for purely two-dimensional case.
Author: Nay Lin
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Category :
Languages : en
Pages :
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Author: Tapan Sengupta
Publisher: Springer Science & Business Media
ISBN: 3709101271
Category : Technology & Engineering
Languages : en
Pages : 331
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The articles in the book treat flow instability and transition starting with classical material dealt with in an innovative and rigorous way, some newer physical mechanisms explained for the first time and finally with the very complex topic of bombustion and two-phase flow instabilities.
Author: Shelly Anne Spencer
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 182
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Category : Aeronautics
Languages : en
Pages : 702
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Category : Aeronautics
Languages : en
Pages : 650
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Author: Mehran Tadjfar
Publisher:
ISBN:
Category :
Languages : en
Pages : 428
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Author: Tapan K. Sengupta
Publisher: Cambridge University Press
ISBN: 1009032283
Category : Technology & Engineering
Languages : en
Pages : 644
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Author: Richard W. Johnson
Publisher: CRC Press
ISBN: 1439849579
Category : Science
Languages : en
Pages : 1544
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Handbook of Fluid Dynamics offers balanced coverage of the three traditional areas of fluid dynamics—theoretical, computational, and experimental—complete with valuable appendices presenting the mathematics of fluid dynamics, tables of dimensionless numbers, and tables of the properties of gases and vapors. Each chapter introduces a different fluid dynamics topic, discusses the pertinent issues, outlines proven techniques for addressing those issues, and supplies useful references for further research. Covering all major aspects of classical and modern fluid dynamics, this fully updated Second Edition: Reflects the latest fluid dynamics research and engineering applications Includes new sections on emerging fields, most notably micro- and nanofluidics Surveys the range of numerical and computational methods used in fluid dynamics analysis and design Expands the scope of a number of contemporary topics by incorporating new experimental methods, more numerical approaches, and additional areas for the application of fluid dynamics Handbook of Fluid Dynamics, Second Edition provides an indispensable resource for professionals entering the field of fluid dynamics. The book also enables experts specialized in areas outside fluid dynamics to become familiar with the field.
