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 review of literature final rept Aug 77 Sep 79 Air Force Aero Propulsion Lab Wright patterson AFB OH written by D. C. Wiggert and published by . This book was released on 1980 with total page 0 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 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 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 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 The Role of Cavitation in Mechanical Failures written by Mechanical Failures Prevention Group and published by . This book was released on 1974 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cavitation Damage and the Effect of Fluid Temperature on the Performance of an Axial flow Pump in Liquid Sodium written by Walter S. Cunnan and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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:

Download or read book Investigation of the Mechanics of Cavitation and Cavitation Damage written by Robert T. Knapp and published by . This book was released on 1957 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Accelerated Cavitation Damage of Steels and Superalloys in Liquid Metals written by Stanley G. Young and published by . This book was released on 1966 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Developments in Cavitation Mechanisms written by Seiichi Washio and published by Woodhead Publishing. This book was released on 2014-08-28 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: How does cavitation start? Presently, the nucleus theory provides the answer to this fundamental question. However the idea of nuclei contains inaccuracies that cannot be rationalized. Recent Developments in Cavitation Mechanisms discusses the uncertainties surrounding the nucleus theory, and proposes another theory of cavitation mechanism. Characteristically, the new theory is based on recent discoveries of cavity generation phenomena in separating flows. This book consists of chapters that introduce topics such as unsoundness of cavitation nuclei, and phenomena of cavity generation on walls of flow separation in hydraulic oil and water flows. Subsequent chapters cover the mechanism of cavity generation at point of flow separation, nucleation by contact motion between solids in liquid and a proposal of new cavitation mechanism based on flow separation and solid contact. The final chapters present the demonstration of a new mechanism in the hydraulic poppet valve and a concluding summary. proposes a new mechanism of cavitation inception in liquid machines describes in detail phenomena of cavity generation at point of flow separation recently discovered by the author discusses peculiar properties of flow separation as cause of cavity generation presents abundant experimental data of incipient cavitation obtained with high resolution of time and space provides supplementary materials of slow motion videos that can help understand the very rapid and minute phenomena of cavity generation which has been discovered by the author and will be still unfamiliar to many

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 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 Symposium on Cavitation Research Facilities and Techniques written by John William Holl and published by . This book was released on 1964 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parameters Affecting Cavitation and Some New Methods for Their Study written by Albert T. Ellis and published by . This book was released on 1965 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: New experimental observations are presented which support the high speed jet mechanism of cavitation damage. A general discussion of the basic hydrodynamic theory involved is given and the importance of certain parameters on damage are pointed out. New techniques for studying the collapse of single cavities are described and the concept and development of a high speed photographic system using a ruby laser is outlined. Magnifications of up to fifty times at picture repetition rates as high as 1,600,000 per second and exposure times of 20 billionths of a second have been achieved. (Author).