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Author : Reza Taghavi
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (319 download)
Download or read book Cavitation Inception in Axisymmetric Turbulent Jets written by Reza Taghavi and published by . This book was released on 1985 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Garnell S. Belt
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.:/5 (227 download)
Download or read book Cavitation Inception Observations on Axisymmetric Headforms with Turbulence Stimulators written by Garnell S. Belt and published by . This book was released on 1983 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation inception observations were made in the DTNSRDC 36-inch water tunnel on three axisymmetric headforms with and without various turbulence stimulators installed. Direct measurements of transition, made on two of the headforms with and wothout distributed surface roughness, were found to correlate reasonably well with the computed spatial amplification factors, e to the Nth power with 7
Author : Kean Khoon Ooi
Publisher :
ISBN 13 :
Total Pages : 213 pages
Book Rating : 4.:/5 (227 download)
Download or read book Scale Effects on Cavitation Inception in Submerged Jets written by Kean Khoon Ooi and published by . This book was released on 1981 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four scale effects were studied: (1) jet size; (2) jet velocity; (3) dissolved air content; and (4) the nuclei population in the flow. The nuclei population was artificially altered by 'electrolysis seeding.' Holography and schlieren photography were used to observe the flow. Direct measurements of the nuclei population were also accomplished by holography. In addition, the instantaneous pressure field in the jet was successfully mapped using specially tailored bubbles as pressure sensors. It was found that inception did not generally occur in the cores of the turbulent eddies and that the region in which the cavities were first seen were dependent on the size of the jet. Pressure measurements showed that the negative peak pressure fluctuation intensities of as high as 120% of the dynamic head existed in the jet. Results also revealed that the instanteous pressure fluctuations have a slightly skewed bell shape probability distribution. For the present tests, the inception index was independent of the exit velocity for a constant size jet. However, when the flow was seeded, the inception number showed a linear dependence on velocity and this dependence increased with increased number of seeded nuclei. The effects of the nuclei number density and pressure fluctuations are incorporated in a 'probable cavitation occurrence' parameter which shows promise in reducing scatter in this type of experiment.
Author : Thomas T. Huang
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)
Download or read book Cavitation Inception Observations on Two Axisymmetric Headforms written by Thomas T. Huang and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation inception observations on two axisymmetric headforms were made in the DTNSRDC 36-inch water tunnel. The results indicate that cavitation inception on a headform with natural flow transition is significantly affected by the air content of the water. The effect of air content on cavitation inception on a headform with laminar separation is less pronounced. Visible cavitation inception never occurred at the locations of minimum static pressure but was observed to occur in the region of natural transition and the separated shear layer following laminar separation. It is concluded that both the viscous effects and cavitatable microbubble population are extremely important parameters governing the cavitation inception process. (Author).
Author : Jean-Pierre Franc
Publisher : Springer Science & Business Media
ISBN 13 : 1402022336
Total Pages : 321 pages
Book Rating : 4.4/5 (2 download)
Download or read book Fundamentals of Cavitation written by Jean-Pierre Franc and published by Springer Science & Business Media. This book was released on 2006-01-22 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth. Cavitation is generated not only in water, but also in any kind of fluid, such as liquid hydrogen. The generation of cavitation can cause severe damage in hydraulic machinery. Therefore, the prevention of cavitation is an important concern for designers of hydraulic machinery. On the contrary, there is great potential to utilize cavitation in various important applications, such as environmental protection. There have been several books published on cavitation, including one by the same authors. This book differs from those previous ones, in that it is both more physical and more theoretical. Any theoretical explanation of the cavitation phenomenon is rather difficult, but the authors have succeeded in explaining it very well, and a reader can follow the equations easily. It is an advantage in reading this book to have some understanding of the physics of cavitation. Therefore, this book is not an introductory text, but a book for more advanced study. However, this does not mean that this book is too difficult for a beginner, because it explains the cavitation phenomenon using many figures. Therefore, even a beginner on cavitation can read and can understand what cavitation is. If the student studies through this book (with patience), he or she can become an expert on the physics of cavitation.
Author : Claude Strope
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (263 download)
Download or read book Observations of Entrainment Processes in Axisymmetric Turbulent Jets written by Claude Strope and published by . This book was released on 1992 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 568 pages
Book Rating : 4.:/5 (319 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ven Te Chow
Publisher : Elsevier
ISBN 13 : 1483215229
Total Pages : 453 pages
Book Rating : 4.4/5 (832 download)
Download or read book Advances in Hydroscience written by Ven Te Chow and published by Elsevier. This book was released on 2013-10-22 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Hydroscience, Volume 12-1981 covers articles in the areas of fluid mechanics and hydrology. The book presents articles on advances in cavitation research, applied stochastic theory of storage in evolution, and echohydrodynamics. The text also includes articles on the usefulness and the basic nature of the application of pattern recognition in the context of hydrologic data analysis. A summary of the Hydrologic Engineering Center's experience in water resources system simulation is also encompassed. The book will prove invaluable to hydrologists, practitioners handling the design and control of hydraulic structures and machinery, and engineers working in the water industry.
Author : Peter B. V. Johansson
Publisher :
ISBN 13 : 9789172911796
Total Pages : 24 pages
Book Rating : 4.9/5 (117 download)
Download or read book The Axisymmetric Turbulent Wake written by Peter B. V. Johansson and published by . This book was released on 2002 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wayne Curt Huber
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (24 download)
Download or read book Cavitation Inception in Turbulent Boundary Layers Over Rough Surfaces written by Wayne Curt Huber and published by . This book was released on 1969 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph Katz
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.:/5 (227 download)
Download or read book Cavitation Inception in Separated Flows written by Joseph Katz and published by . This book was released on 1981 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phenomenon of cavitation was studied on four axisymmetric bodies whose boundary layers underwent a laminar separation and a subsequent turbulent reattachment. The conditions for cavitation inception and desinence were determined and several holograms were recorded just prior to and at the onset of cavitation. The population of microbubbles and the nature of the subsequent development of visible cavitation was determined from the reconstructed image. Cavitation inception occurred in the turbulent shear layer downstream of the transition region. When the separation zone was large the inception region was located within the most developed section of the mixing layer but upstream of the reattachment zone. When the separation region was small inception occurred close to the reattachment zone but still detached from the body surface. A comparison between the surface minimum pressure and the cavitation inception indices also indicated that inception could not occur near the surface of the bodies having a large separation region. The appearance of visible cavities was preceded by the appearance of a cluster of microbubbles only in the cavitation inception region. The nuclei population in the other sections of the flow field remained fairly uniform. This observation supports the assumption that cavitation is initiated from microscopic free stream nuclei.
Author : Sheldon Green
Publisher : Springer Science & Business Media
ISBN 13 : 940110249X
Total Pages : 905 pages
Book Rating : 4.4/5 (11 download)
Download or read book Fluid Vortices written by Sheldon Green and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 905 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid Vortices is a comprehensive, up-to-date, research-level overview covering all salient flows in which fluid vortices play a significant role. The various chapters have been written by specialists from North America, Europe and Asia, making for unsurpassed depth and breadth of coverage. Topics addressed include fundamental vortex flows (mixing layer vortices, vortex rings, wake vortices, vortex stability, etc.), industrial and environmental vortex flows (aero-propulsion system vortices, vortex-structure interaction, atmospheric vortices, computational methods with vortices, etc.), and multiphase vortex flows (free-surface effects, vortex cavitation, and bubble and particle interactions with vortices). The book can also be recommended as an advanced graduate-level supplementary textbook. The first nine chapters of the book are suitable for a one-term course; chapters 10--19 form the basis for a second one-term course.
Author : Edward Maurice Gates
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Influence of Freestream Turbulence Freestream Nuclei Populations and a Drag-Reducing Polymer on Cavitation Inception on Two Axisymmetric Bodies written by Edward Maurice Gates and published by . This book was released on 1977 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence upon the basic viscous flow about two axisymmetric bodies of (i) freestream turbulence level and (ii) the injection of small amounts of a drag-reducing polymer (Polyox WSR 301) into the test model boundary layer was investigated by the schlieren flow visualization technique. The changes in the type and occurrence of cavitation inception caused by the subsequent modifications in the viscous flow were studied. A nuclei counter using the holographic technique was built to monitor freestream nuclei populations and a few preliminary tests investigating the consequence of different populations on cavitation inception were carried out. Both test models were observed to have a laminar separation over their respective test Reynolds number ranges. The separation on one test model was found to be insensitive to freestream turbulence levels of up to 3.75 percent. The second model was found to be very susceptible having its critical velocity reduced from 30 feet per second at a 0.04 percent turbulence level to 10 feet per second at a 3.75 percent turbulence level. Cavitation tests on both models at the lowest turbulence level showed the value of the incipient cavitation number and the type of cavitation were controlled by the presence of the laminar separation. Cavitation tests on the second model at 0.65 percent turbulence level showed no change in the inception index, but the appearance of the developed cavitation was altered.
Author : Edward M. Gates
Publisher :
ISBN 13 :
Total Pages : 197 pages
Book Rating : 4.:/5 (854 download)
Download or read book The Influence of Freestream Turbulence, Freestream Nuclei Populations and Drag-reducing Polymer on Cavitation Inception on Two Axisymmetric Bodies written by Edward M. Gates and published by . This book was released on 1977 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shigeki Nagaya
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (254 download)
Download or read book Bubble cavitation inception on an axisymmetric headform written by Shigeki Nagaya and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William M. Pitts
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (53 download)
Download or read book Reynolds Number Effects on the Mixing Behavior of Axisymmetric Turbulent Jets written by William M. Pitts and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James W. Daily
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (359 download)
Download or read book Turbulence and Boundary Layer Effects on the Inception of Cavitation from Gas Nuclei written by James W. Daily and published by . This book was released on 1955 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
