Download or read book Cavitation Damage mechanisms Experimental Study of Cavitation in a Spool Valve Final technical rept Aug 77 Sep 79 Air Force Aero Propulsion Lab Wright patterson AFB OH written by C.S. Martin and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cavitation Damage Mechanisms written by C. S. Martin and published by . This book was released on 1980 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cavitation Damage Mechanisms Experimental Study of Cavitation in a Spool Valve written by C. S. Martin and published by . This book was released on 1980 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation has been investigated in directional control valves in order to identify damage mechanisms characteristic of components of aircraft hydraulic systems. Extensive tests were conducted in a representative metal spool valve and in a model three times larger. Both valves are well instrumented for the purpose of accurately measuring mean quantities as well as detecting the onset and extent of cavitation once it developed. Non-cavitating data taken with both valves showed that the position of the high-velocity annular jet issuing from the orifice shifted orientation depending upon valve opening and Reynolds number. By means of high-frequency response pressure transducers strategically placed in the valve chamber of each test valve cavitation could be sensed by the correlation of noise with a cavitation index. Cavitation inception could be detected by comparing energy spectra for a fixed valve opening and a constant discharge. Another sensitive indicator of cavitation inception is the ratio of cavitating to non-cavitating spectral densities. The incipient cavitation index as defined in this investigation correlates well with the Reynolds number for both valves. Once cavitation develops, an accelerometer properly located on the cavitating component can be as sensitive to cavitation noise as a pressure transducer. Energy levels under developed cavitation were affected to some extent by temperature differences.

Download or read book Cavitation Damage Mechanisms Review of Literature written by D. C. Wiggert and published by . This book was released on 1980 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a companion volume to 'Cavitation Damage Mechanisms: Experimental Study of Cavitation in a Spool Valve.' The state-of-the-art available in the literature is reviewed relative to occurrence of cavitation, the effects of dissolved and free gas, and so-called secondary aspects of combustion/sono-luminescence and electrical/chemical effects. It should be noted that a paucity of literature exists with regard to cavitation in oil hydraulic systems; consequently much of the material discussed deals with water as the working fluid. Throughout the text clear distinctions are made as to the fluid under discussion. The small number of references which do relate to oils are covered as thoroughly as deemed necessary. The last topic to be presented concerns cavitation in hydraulic actuators. This is a markedly different type of cavitation than is dealt with in the present experimental study; it is included for completeness and due to the fact that it can be a potential problem in control system performance, although most often it creates no permanent mechanical damage to actuator components.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Experimental Study of the Structure and Dynamics of Cavitating Flows written by Guangjian Zhang and published by Scientific Research Publishing, Inc. USA. This book was released on 2023-11-06 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation refers to a distinctive occurrence within liquid flows where there is a phase change process involving the rapid transformation of liquid into vapour in regions of low pressure, followed by collapsing or implosion when pressure rises again. The study of cavitation dates back to the late 19th century. While the term “cavitation” was originally coined by R. E. Froude and first documented by Barnaby and Thornycroft in 1895, the concept had been speculated upon much earlier by L. Euler in his 1754 theory on water turbines. However, the phenomenon of cavitation was initially observed and examined by Barnaby and Parsons in 1893. They identified that the formation of vapour bubbles on propeller blades had led to the failure of the sea trial of the British high-speed warship HMS Daring in 1885. In 1895, Parsons established the first water tunnel dedicated to cavitation research, revealing the connection between cavitation and propeller damage. The theoretical groundwork for cavitation research was laid by Rayleigh in 1917, as he successfully addressed the collapse of an empty cavity within a substantial liquid mass. Since then, numerous research work has been published on cavitating flow.

Download or read book Research on Cavitation Damage Mechanisms written by Charles Samuel Martin and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1980 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Theoretical Investigation of Cavitation in Water written by J. Ackeret and published by . This book was released on 1936 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Cavitation Damage to High purity Metals and a Nickel base Superalloy in Water written by Stanley G. Young and published by . This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Fluids Engineering written by and published by . This book was released on 1981 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Second International Conference on Cavitation written by Institution of Mechanical Engineers (Great Britain). Power Industries Division and published by Institution of Mechanical Engineers. This book was released on 1983 with total page 314 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 Experimental Studies of Cavitation Damage in Alkali Metal Pumps for Application in Space Power Systems written by Cavour H. Hauser and published by . This book was released on 1967 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical and Experimental Study on Cavitation in Positive Displacement Pumps and Its Application in Valve Design Optimization written by Aldo Iannetti and published by . This book was released on 2015 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Italian Mechanism Science written by Vincenzo Niola and published by Springer Nature. This book was released on 2022-08-05 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 4th International Conference of IFToMM ITALY (IFIT), held in Naples, Italy on September 7-9, 2022. It includes peer-reviewed papers on the latest advances in mechanism and machine science, discussing topics such as biomechanical engineering, computational kinematics, the history of mechanism and machine science, gearing and transmissions, multi-body dynamics, robotics and mechatronics, the dynamics of machinery, tribology, vibrations, rotor dynamics and vehicle dynamics. A valuable, up-to-date resource, it offers an essential overview of the subject for scientists and practitioners alike, and will inspire further investigations and research.

Download or read book Some Visual Observations of Cavitation in Rotating Machinery written by Richard F. Soltis and published by . This book was released on 1965 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: