Visualization of Boundary Layer Flow PDF Download
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Author: J. H. Preston
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 6
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Book Description
Author: J. H. Preston
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 6
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Book Description
Author: Reazul Huq
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 188
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Book Description
The report deals with one way of generating an unsteady flow past a body -- breaking the diaphragm of a shock tube. A visualization of the phenomenon within the boundary layer of such a flow was attempted by using bubbles. A method has been suggested for further work in this line. An unsteady flow was then generated using water as the flow medium in a towing tank following the principles of Ahlborn. Various improvements have led to an experiment that can visualize the details of flow within the boundary layer. The technique has been successfully applied to the case of unsteady flow past a flat plate.
Author: Wen Jei Yang
Publisher: Routledge
ISBN: 1351442619
Category : Technology & Engineering
Languages : en
Pages : 723
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Book Description
With contributions from some of the world's leading experts, the second edition of this classic reference compiles all major techniques of flow visualization and demonstrates their applications in all fields of science and technology. A new chapter has been added that covers flow visualization applications in large wide tunnels for airplane and automobile testing. Several important examples of applications are included. A second new chapter details the use of infrared (IR) cameras for detecting and observing the boundary layer transition in industrial wind tunnels and flight testing of commercial transport airplanes. A final new chapter has been added on multiphase flow and pulsed-light velocimetry.
Author: Alexander J. Smits
Publisher: World Scientific
ISBN: 184816792X
Category : Technology & Engineering
Languages : en
Pages : 442
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Book Description
This is the 2nd edition of the book, Flow Visualization: Techniques and Examples, which was published by Imperial College Press in 2000. Many of the chapters have been revised and updated to take into consideration recent changes in a number of flow visualization and measurement techniques, including an updated high quality flow gallery. Unique among similar publications, this book focuses on the practical rather than theoretical aspects. Obtaining high quality flow visualization results is, in many ways, more of an art than a science, and experience plays a key deciding role. The depth and breadth of the material will make this book invaluable to readers of all levels of experience in the field.
Author: G. C. Herring
Publisher: DIANE Publishing
ISBN: 1428990690
Category : Aerodynamics, Supersonic
Languages : en
Pages : 28
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Book Description
We demonstrate instantaneous flow visualization of the boundary layer region of a Mach 2.5 supersonic flow over a flat plate that is interacting with an impinging shock wave. Tests were performed in the Unitary Plan Wind Tunnel (UPWT) at NASA Langley Research Center. The technique is elastic light scattering using 10-nsec laser pulses at 532 nm. We emphasize that no seed material of any kind, including water (H2O), is purposely added to the flow. The scattered light comes from a residual impurity that normally exists in the flow medium after the air drying process. Thus, the technique described here differs from the traditional vapor-screen method, which is typically accomplished by the addition of extra H2O vapor to the airflow. The flow is visualized with a series of thin two-dimensional light sheets (oriented perpendicular to the streamwise direction) that are located at several positions downstream of the leading edge of the model. This geometry allows the direct observation of the unsteady flow structure in the spanwise dimension of the model and also allows the indirect observation of the boundary layer growth in the streamwise dimension.
Author: Arthur G. Hansen
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 106
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Book Description
Flow-visualization techniques are employed to ascertain the streamline patterns of the nonpotential, secondary flows in the boundary layers of cascades, thereby providing a basis for more extended analyses in turbomachines. The three-dimensional deflection of the end-wall boundary layer results in the formation of a vortex well up in each cascade passage. The size and tightness of the vortex generated depend upon the main flow turning in the cascade passage. Once formed, a vortex resists turning in subsequent blade rows. This results in unfavorable angles of attack and possible flow disturbances on the pressure surfaces of subsequent blade rows when the vortices impinge on these surfaces.
Author: Wolgang Merzkirch
Publisher: Elsevier
ISBN: 0080506585
Category : Technology & Engineering
Languages : en
Pages : 271
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Book Description
Flow Visualization, Second Edition focuses on developments, applications, and results in the field of flow visualization. Organized into four chapters, this book begins with the principles of flow visualization and image processing. Subsequent chapters describe the methods of flow visualization, particularly the addition of foreign material to the flowing fluid that might be gaseous or liquid; certain optical methods that are sensitive to changes of the index of refraction; and flow field marking by heat and energy addition.
Author: Ermanno Bazzocchi
Publisher:
ISBN:
Category :
Languages : en
Pages : 33
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Book Description
Author: Sunil Chithranjan.* Tantirige
Publisher:
ISBN:
Category :
Languages : en
Pages : 412
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Book Description
Author: Allen Edward Winkelmann
Publisher:
ISBN:
Category : Flow visualization
Languages : en
Pages : 84
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Book Description
Various flow-visualization results are presented for a cylindrically blunted, unswept fin (yawed and unyawed) partially immersed in a turbulent boundary layer (delta approx. = 2.6 inches). The model, consisting of a fin-flat plate combination, was tested at a nominal Mach number of 5 and nominal free-stream Reynolds numbers per foot of 2800 000 and 7400 000. Azobenzene tests show regions of high heat transfer on the flat plate immediately upstream and downstream of the fin. Oil smear tests show in detail the surface shear directions and locations of separated flow which occur on the model. Schlieren and shadowgraph photographs indicate the complex shock wave structure which exists in front of the fin. A possible flow-field model is suggested to account for the observed flow patterns. (Author).
