Download or read book Mechanisms of Cavitation Erosion Damage and Related Models and Scaling Studies of the NASL Rotating Disk Facility written by E. L. Bourodēmos and published by . This book was released on 1970 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Studies to Establish Scaling Laws for Modeling Cavitation Damage Intensity written by R. E. Kohl and published by . This book was released on 1968 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental facility called the 'rotating foil apparatus' was designed and built to study cavitation erosion in an actual but controllable hydrodynamic system. Test results from this apparatus have confirmed the time dependence of cavitation intensity and also indicated the relationship between erosion intensity (I sub e) and cavitation parameter (sigma) for an NACA 16-021 foil section at 181 ft/sec. A family of the I sub e versus sigma curves is sought for several velocities so that the true relation between I sub e and velocity can be established thus providing a clue of the pressure which causes the bubbles to collapse. Additional testing is planned to determine the relationship between Reynold's number (Re) and erosion intensity (I sub e) for several values of cavitation parameter (sigma). The ultimate objective is modeling cavitation erosion. (Author).
Download or read book Cavitation Erosion in Fluid Systems written by Walter L. Swift and published by . This book was released on 1981 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction written by Ki-Han Kim and published by Springer. This book was released on 2014-07-08 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive treatment of the cavitation erosion phenomenon and state-of-the-art research in the field. It is divided into two parts. Part 1 consists of seven chapters, offering a wide range of computational and experimental approaches to cavitation erosion. It includes a general introduction to cavitation and cavitation erosion a detailed description of facilities and measurement techniques commonly used in cavitation erosion studies, an extensive presentation of various stages of cavitation damage (including incubation and mass loss) and insights into the contribution of computational methods to the analysis of both fluid and material behavior. The proposed approach is based on a detailed description of impact loads generated by collapsing cavitation bubbles and a physical analysis of the material response to these loads. Part 2 is devoted to a selection of nine papers presented at the International Workshop on Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction (Grenoble, France, 1-2 March 2011) representing the forefront of research on cavitation erosion. Innovative numerical and experimental investigations illustrate the most advanced breakthroughs in cavitation erosion research.
Download or read book Cavitation and Impact Erosion written by Phillip Eisenberg and published by . This book was released on 1969 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scaling Laws for Cavitation Erosion written by A. Thiruvengadam and published by . This book was released on 1971 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the report, six scaling laws are derived and used to investigate the feasibility of modeling cavitation erosion. The velocity scale and size scale are studied with regard to six nondimensional ratios, namely. the erosion number, the relative nuclei size, the Weber number, the cavitation number, the cavitation inception number and the degree of cavitation. These scaling laws indicate that it is possible to model erosion in the laboratory and to predict the prototype performance. In addition, these scaling laws may be used to explain many currently available experimental observations.
Download or read book ASME 69 WA FE 3 written by Bezzam C. S. Rao and published by . This book was released on 1969 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Cavitation Erosion written by A. Thiruvengadam and published by . This book was released on 1974 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Hydrodynamic Parameters on Cavitation Erosion Intensity written by A. Thiruvengadam and published by . This book was released on 1970 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rotating foil apparatus was developed and used to study the effect of exposure time, pressure, velocity and size of the foil on intensity of cavitation erosion. Earlier studies with a vibratory apparatus showed that the rate of erosion increases with exposure time, reaches a maximum value and then decreases. These observations are essentially confirmed for the case of erosion on an actual hydrofoil. The maximum rate of erosion is then correlated with the cavitation parameter for two sizes of NACA 16-021 hydrofoil (3 inches and 1 1/2 inches in chord length). The intensity of erosion increases with decreasing cavitation parameter, reaches a peak and then decreases with decreasing cavitation parameter at a given velocity. An approximate analysis was made to explain this result. According to this analysis, the intensity of erosion should vary as the cube of the velocity and should be independent of the size of the foil. However, the experimental results show that the intensity of erosion varies as the sixth power of the velocity and also depends on the size of the foil. An understanding of these two scale effects is essential for a successful model-prototype correlation. (Author).
Download or read book ASME 66 FE 11 written by Glenn M. Wood and published by . This book was released on 1966 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scaling of Cavitation Damage written by David R. Stinebring and published by . This book was released on 1976 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation has focused on the initial stages of cavitation erosion using a ductile material in a flowing system employing water as the working fluid. The test models were 0.635 cm diameter zero-caliber ogives made of pure annealed aluminum. The aluminum was selected as a material which would be suitable for recording the intensity of cavitation bubble collapse. The damage in the initial stages was in the form of small indentations in the model surface. The greatest damage was within an area corresponding to the cavity closure point on the model. The pits were round depressions usually under 0.1 mm in diameter, with the majority less than 0.05 mm across. During the formation of these pits, it appears that no material was removed from the surface. Using the pure annealed aluminum test probe, a sufficient damage sample could be generated in a relatively short period of time.
Download or read book Cavitation Damage Resistance and Adhesion of Polymeric Overlay Materials written by JZ. Lichtman and published by . This book was released on 1970 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is concerned with the general problem of cavitation erosion; in particular, with coatings which can provide protection of marine and other structures against cavitation erosion and which can remain adhered when exposed to severe hydrodynamic environments. Cavitation erosion studies were conducted on 25 coatings, comprising both neoprene and polyurethane formulations; the Naval Applied Science Laboratory (NASL) magnetostriction apparatus was used as the principal test device. The most erosion resistant of the coatings tested were found to be polyurethane formulations. Adhesion tests on the more erosion resistant coatings showed no effect of cavitation exposure on strength of adhesion. Comparison of magnetostriction data with data obtained on the NASL rotating disk apparatus showed that cavitation intensity of the magnetostriction test (under presently maintained operational parameters) exceeded the most severe intensity developed by the rotating disk apparatus.
Download or read book Scale Effect Investigation of Cavitation Erosion Using the Energy Parameter written by G. Sebestyén and published by . This book was released on 1967 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors define the energy parameter as the ratio of the volume loss of specimen material during erosion test to a certain fraction of the work done by the cavitation drag force. On the grounds of the analysis of the initial formula of the energy parameter as well as on the basis of experimental investigations, a method is suggested to allow for the influence of geometrical similarity (scale effects) upon cavitation damage when flow velocity or the characteristic dimension of the model and certain physical properties of the fluid, such as viscosity, surface tension, or density, are varied.
Download or read book Investigation of Cavitation Erosion Resistance of Metallic and Non metallic Materials and Polymeric Coatings Using a Rotating Disk Apparatus written by J. Z. Lichtman and published by . This book was released on 1958 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of metallic and plastic disks and coated metal disks were tested to determine their resistance to cavitation erosion by means of a rotating disk apparatus. A considerable variation in erosion resistance was observed, manganese nickel and nickel aluminum bronzes showing the highest resistance among the metals. Aluminum 1100-0 and most of the plastics showed the poorest resistance while a neoprene coating exhibited the highest erosion resistance of all the materials tested. Erosion damage increased exponentially with increase in velocity of the cavitational sources (holes) in the disk. The threshold velocity (below which no measurable damage was obtained) decreased with increase in test time. The degree of adhesion of the coatings to the metallic substrate was a vital factor in determining the erosion protection afforded by the coatings. (Author).
Download or read book U S Navy Cold Weather Handbook for Surface Ships written by and published by . This book was released on 1988 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Esthetic Oral Rehabilitation with Veneers written by Richard D. Trushkowsky and published by Springer Nature. This book was released on 2020-04-16 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book acquaints the clinician with the full range of parameters that need to be considered before undertaking an esthetic rehabilitation with veneers and describes current clinical concepts and techniques. The initial chapters provide the foundation for a comprehensive treatment plan. It is explained how digital smile design in conjunction with a wax-up and functional esthetic prototype allow a patient to visualize the possibilities. Occlusion prior to the initiation of treatment and following treatment is key to the longevity of restorations, and this aspect is given careful consideration. Detailed advice is also offered on proper selection of materials and their placement. The guidance provided will ensure that the reader is fully equipped to gather and assess all relevant information prior to commencement of the final treatment. The treatment itself can range from minimally invasive to more complex depending on the requirements of each individual case. Among the clinical concepts discussed in the book are the use of etched porcelain restorations, minimally invasive CAD/CAM veneers, and the ink glue technique.
Download or read book Lubrication Corrosion and Wear written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1966 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
