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 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 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 A Review on the Mechanisms of Cavitation and Cavitation Damage written by K. Seetharamiah and published by . This book was released on 1967 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taming Liquid Hydrogen written by Virginia Parker Dawson and published by . This book was released on 2004 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Term Durability of Polymeric Matrix Composites written by Kishore V. Pochiraju and published by Springer Science & Business Media. This book was released on 2011-09-25 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-Term Durability of Polymeric Matrix Composites presents a comprehensive knowledge-set of matrix, fiber and interphase behavior under long-term aging conditions, theoretical modeling and experimental methods. This book covers long-term constituent behavior, predictive methodologies, experimental validation and design practice. Readers will also find a discussion of various applications, including aging air craft structures, aging civil infrastructure, in addition to engines and high temperature applications.
Download or read book Liquid Hydrogen as a Propulsion Fuel 1945 1959 written by John L. Sloop and published by . This book was released on 1978 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Architects of American Air Supremacy written by Dik A. Daso and published by . This book was released on 2002-04-01 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Air Force is the most technologically advanced service in the world. Stealth, precision, global range, and space systems are only a few of the hallmarks of the USAF technology. Airborne laser weapons, super-accurate sensors, and hypersonic aircraft are already in the early stages of development. Creations such as these are not the product of stagnant minds or idle hands.It was in 1944 that General of the Army Herny H. "Hap" Arnold established the Army Air Forces (AAF) Scientific Advisory Group (SAG) under the direction of Dr. Theodore von Karman. The SAG meticulously created the first science and technology forecast ever accomplished in military history. The study predicted many of the developments in aviation technology which, today, most Americans take for granted. Some of the more outstanding of these are suipersonic flight, precision weaponry, accurate radr, and the development of intercontinental ballistic missiles (ICBM).In Architects of American Air Supremacy, Dik Daso tells the story of the founding of the scientific and technical base of today's USAF. But this work is much more than simply a history of technology. The SAG was a culminating point reached only after many years of building interpersonal relationships, developing industrial bonds, and tapping the wisdom of America's most influential scientists. In large measure this book reflects the symbiotic nature of the military and the society which it serves. This book is an introduction to the very nature of the USAF - a service founded in aviation science and technology and built by great commanders, innovators, and dedicated men and women in the serivce of their nation.Ronald R. FoglemanGeneral, United States Air ForceChief of Staff
Download or read book History of Shock Waves Explosions and Impact written by Peter O. K. Krehl and published by Springer Science & Business Media. This book was released on 2008-09-24 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique and encyclopedic reference work describes the evolution of the physics of modern shock wave and detonation from the earlier and classical percussion. The history of this complex process is first reviewed in a general survey. Subsequently, the subject is treated in more detail and the book is richly illustrated in the form of a picture gallery. This book is ideal for everyone professionally interested in shock wave phenomena.
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 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Cycle Fatigue written by Theodore Nicholas and published by Elsevier. This book was released on 2006-07-07 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr Theodore Nicholas ran the High Cycle Fatigue Program for the US Air Force between 1995 and 2003 at Wright-Patterson Air Force Base, and is one of the world’s leading authorities on the subject, having authored over 250 papers in leading archival journals and books. Bringing his plethora of expertise to this book, Dr Nicholas discusses the subject of high cycle fatigue (HCF) from an engineering viewpoint in response to a series of HCF failures in the USAF and the concurrent realization that HCF failures in general were taking place universally in both civilian and military engines. Topic covered include: Constant life diagrams Fatigue limits under combined LCF and HCF Notch fatigue under HCF conditions Foreign object damage (FOD) Brings years of the Author's US Air Force experience in high cycle fatigue together in one text Discusses HCF in the context of recent international military and civilian engine failures
Download or read book Historical Perspectives on Vulnerability Lethality Analysis written by and published by . This book was released on 1999 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commencing in the early 1990s, Mr. James O'Bryon of the Office of the Secretary of Defense (OSD), Operational Testing and Evaluation (OT & E), charged the Vulnerability Lethality Division (VLD) of what is now the U.S. Army Research Laboratory (ARL) to capture in a hard-bound book the art/science of vulnerability and lethality (VIL) analysis. This work has since expanded into the publication of a series of volumes, each dedicated to a particular portion of the VIL community-ground mobile targets, hardened fixed targets, aircraft, etc. As a first step in this mammoth effort, a number of articles were commissioned to be gathered from some of the giants in the history of VIL analysis. These articles gave a foundation from which the writing of the first of the series commenced and are collected in this report with the hope that future generations of VIL analysts will find in them inspiration for their own accomplishments.
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:
