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Investigation of volute-impeller interaction in pumps
Classified Classified
abstracts
abstracts
267-504
267-279 on this page
Editor’s note The label immediately following the title of each item denotes country or origin of publication, and that at the end of each abstract indicates country or origin of work (where known).
I. General vacuum IO. Vacuum
science
and engineering
science and technology
10 : 34 267. Vacuum technology. (USA) Vacuum technology in production of thin films and space simulation is discussed, including limits of vacuum ranges and some existing vacuum scales; molecular flow through orifices and long pipes and its influence on pumping. A typical vacuum system is described. Simulation of the vacua in space is considered including problems of cost. D Santeler, Proc Conf Simulation in Space Technology, Rep NASACRd4952, Aug 1964. 10 268. A glance at vacuum technology in Western Europe. (USA) R L Bonem, ReslDevelop, Ott 1966, 8Zd3. 12. Measurement
of low pressures
12 269. The problem of ultrahigh vacuum measurements. (USA) An assessment of the sensitivity of ultrahigh vacuum gauges is given. Presently available gauges are found to be in considerable error at pressures of lo-i3 torr, and even less reliable in the range lo-i6 torr. Available ultrahigh vacuum gauges are compared. P R Yeager, ReslDevelop, Ott 1966, 6367. 12 270. Mass-spectrometer methods. (USSR) The fundamental data involved in methods of determining chemical composition using mass-spectrometers are presented. Principles of mass-spectrometry are explained and methods of automatic processing control are discussed. A survey of Soviet-made mass-spectrometers is included. N N Shumilovskiy and R I Stakhovskiy, Book publd by Energiya, Moscow-Leningrad 1966, 160 pages (in Russian). 13. Vacuum
applications
13 271. Vacuum properties of materials for electronic devices. (USSR) This book is devoted to material problems connected with the design of tubes and other vacuum electronic devices. Processing of a cathode oxide coatings, vacuum properties of metals, glasses, ceramics and mica, gettering, sorption, adsorption and gas conduits through materials are analyzed and practical recommendations to designers are given. N V Cherepnin, Book publd by Sovietskoe Radio, Moscow, 1966, 350 pages (in Russian). 13 272. Materials for electronics (metals and alloys). (USSR) This handbook on metals and their alloys is aimed at designers of electron devices. Basic information on electrical and vacuum properties and on methods of preparations of W, MO, Ta, Nb, Ti, Zr, Re, Ni, Fe, Cu, Al, Hg, Mg, Ba, Sr and their alloys are given. M A Lebedmskiy, Book publd by Energiya, Moscow-Leningrad, 1966, 230 pages (in Russian). 13 :30 273. Vacuum technology in the production of thin films. (Czechoslovakia) Modem vacuum techniques associated with thin film production are reviewed with particular reference to : cathodic sputtering; the quality of vacuum required to vaporize thin films under high vacuum ; production of vacuum by diffusion, turbomolecular. zeolite, cryogenic and getter-ion pumps; design of joints in thin film production equipment ; methods of evaporation including electron beam heating
and techniques for alloy evaporation; and thin film production without vacuum. A comprehensive bibliography is provided. W Espe, Feinwerktechnik, 70 (I and 2), 1966,2-8,5764 (in German). 14. Kinetic
theory of gases
14 274. Molecular flow in the transition region. Validity of the diffusion equation. (France) Using the theoretical methods of stochastic processes, the validity of the diffusion equation (Fick’s equation), with regard to the condition of molecular flow, is established. Diffusion coefficients are determined which take account of surface diffusion and the average sticking time of adsorber molecules. G Armand, Le Vide, 21 (125)) Sept-Ott 1966,408-417 (in French). 15. Fluid dynamics 15 275. Bulk and diffusional transport in the region between molecular and viscous llow. (USA) Analytical and experimental analyses are presented for bulk and diffusional flow of a binary gas mixture under steady-state conditions. The analyses are valid for the entire region between pure molecular and viscous flow. The analysis is made for flow through a capillary tube subjected to a small pressure gradient. D F Dyer and J E Sunderland, Intern J Heat Transfer, 9 (6), 1966, 519-526. 15 276. Investigation of volute-impeller interaction in pumps. (USA) The effect of differences in the geometry of volutes having the same areas on the performance of pumps such as in head capacity curve, radial thrust and runout capacity is described. A Rovats, Fluids Eng Conf Denver, Colorado, April 1966,P pages. 16. Gases and solids
16 277. Adsorption studies in a fluorhrathtgatmosphere. (France) An apparatus for studying the sorption of corrosive fluorine-containing gases is described. Equipment constructed of conventional materials. as well as Ni, Al and Al alloy constructions, were tested. J J Abassin et al, Corn Energie Atom&e, CEA-R-2952, 1966, 76 pages (in French). 16 278. On the mechanism of oxygen sorption on (100) face of tungsten single crystals. (USSR) Work functions of the (100) W single crystal face were measured at temperatures 300-1700°K during bombardment of this face by an oxygen molecular beam. A two-stage sorption mechanism was observed. At 1000°K absorbed oxygen surface density was 2.5 x 1Ol6 cmmaforming Wzo and W,,, complexes. Ya P Zhuzerman and V A Ischuk. Fiz Tverd Tela. 8 (10).~, Oct. 1966. ’ 2999-300~ (in Russian). 16 : 21 279. Adsorption of gases and vaponrs on molecular sieves. (Czechoslovakia) The different types of adsorbent are considered and the properties of synthetic zeolites (molecular sieves) are described with reference to their adsorption isotherms with various gases and vapours. The importance and applications of adsorption isobars and isosteres are briefly explained. Applications of the molecular sieves to vacuum engineering are discussed including the following topics: dry pumping systems and non-refrigerated isolation traps; adsorption of water and oil vapours; and the failure of non-refrigerated traps in mercury diffusion pumps. W Espe et al, Feinwerktechnik, 70 (6)) 1966, 269-273 (in German). 109
abstracts
abstracts
267-504
267-279 on this page
Editor’s note The label immediately following the title of each item denotes country or origin of publication, and that at the end of each abstract indicates country or origin of work (where known).
I. General vacuum IO. Vacuum
science
and engineering
science and technology
10 : 34 267. Vacuum technology. (USA) Vacuum technology in production of thin films and space simulation is discussed, including limits of vacuum ranges and some existing vacuum scales; molecular flow through orifices and long pipes and its influence on pumping. A typical vacuum system is described. Simulation of the vacua in space is considered including problems of cost. D Santeler, Proc Conf Simulation in Space Technology, Rep NASACRd4952, Aug 1964. 10 268. A glance at vacuum technology in Western Europe. (USA) R L Bonem, ReslDevelop, Ott 1966, 8Zd3. 12. Measurement
of low pressures
12 269. The problem of ultrahigh vacuum measurements. (USA) An assessment of the sensitivity of ultrahigh vacuum gauges is given. Presently available gauges are found to be in considerable error at pressures of lo-i3 torr, and even less reliable in the range lo-i6 torr. Available ultrahigh vacuum gauges are compared. P R Yeager, ReslDevelop, Ott 1966, 6367. 12 270. Mass-spectrometer methods. (USSR) The fundamental data involved in methods of determining chemical composition using mass-spectrometers are presented. Principles of mass-spectrometry are explained and methods of automatic processing control are discussed. A survey of Soviet-made mass-spectrometers is included. N N Shumilovskiy and R I Stakhovskiy, Book publd by Energiya, Moscow-Leningrad 1966, 160 pages (in Russian). 13. Vacuum
applications
13 271. Vacuum properties of materials for electronic devices. (USSR) This book is devoted to material problems connected with the design of tubes and other vacuum electronic devices. Processing of a cathode oxide coatings, vacuum properties of metals, glasses, ceramics and mica, gettering, sorption, adsorption and gas conduits through materials are analyzed and practical recommendations to designers are given. N V Cherepnin, Book publd by Sovietskoe Radio, Moscow, 1966, 350 pages (in Russian). 13 272. Materials for electronics (metals and alloys). (USSR) This handbook on metals and their alloys is aimed at designers of electron devices. Basic information on electrical and vacuum properties and on methods of preparations of W, MO, Ta, Nb, Ti, Zr, Re, Ni, Fe, Cu, Al, Hg, Mg, Ba, Sr and their alloys are given. M A Lebedmskiy, Book publd by Energiya, Moscow-Leningrad, 1966, 230 pages (in Russian). 13 :30 273. Vacuum technology in the production of thin films. (Czechoslovakia) Modem vacuum techniques associated with thin film production are reviewed with particular reference to : cathodic sputtering; the quality of vacuum required to vaporize thin films under high vacuum ; production of vacuum by diffusion, turbomolecular. zeolite, cryogenic and getter-ion pumps; design of joints in thin film production equipment ; methods of evaporation including electron beam heating
and techniques for alloy evaporation; and thin film production without vacuum. A comprehensive bibliography is provided. W Espe, Feinwerktechnik, 70 (I and 2), 1966,2-8,5764 (in German). 14. Kinetic
theory of gases
14 274. Molecular flow in the transition region. Validity of the diffusion equation. (France) Using the theoretical methods of stochastic processes, the validity of the diffusion equation (Fick’s equation), with regard to the condition of molecular flow, is established. Diffusion coefficients are determined which take account of surface diffusion and the average sticking time of adsorber molecules. G Armand, Le Vide, 21 (125)) Sept-Ott 1966,408-417 (in French). 15. Fluid dynamics 15 275. Bulk and diffusional transport in the region between molecular and viscous llow. (USA) Analytical and experimental analyses are presented for bulk and diffusional flow of a binary gas mixture under steady-state conditions. The analyses are valid for the entire region between pure molecular and viscous flow. The analysis is made for flow through a capillary tube subjected to a small pressure gradient. D F Dyer and J E Sunderland, Intern J Heat Transfer, 9 (6), 1966, 519-526. 15 276. Investigation of volute-impeller interaction in pumps. (USA) The effect of differences in the geometry of volutes having the same areas on the performance of pumps such as in head capacity curve, radial thrust and runout capacity is described. A Rovats, Fluids Eng Conf Denver, Colorado, April 1966,P pages. 16. Gases and solids
16 277. Adsorption studies in a fluorhrathtgatmosphere. (France) An apparatus for studying the sorption of corrosive fluorine-containing gases is described. Equipment constructed of conventional materials. as well as Ni, Al and Al alloy constructions, were tested. J J Abassin et al, Corn Energie Atom&e, CEA-R-2952, 1966, 76 pages (in French). 16 278. On the mechanism of oxygen sorption on (100) face of tungsten single crystals. (USSR) Work functions of the (100) W single crystal face were measured at temperatures 300-1700°K during bombardment of this face by an oxygen molecular beam. A two-stage sorption mechanism was observed. At 1000°K absorbed oxygen surface density was 2.5 x 1Ol6 cmmaforming Wzo and W,,, complexes. Ya P Zhuzerman and V A Ischuk. Fiz Tverd Tela. 8 (10).~, Oct. 1966. ’ 2999-300~ (in Russian). 16 : 21 279. Adsorption of gases and vaponrs on molecular sieves. (Czechoslovakia) The different types of adsorbent are considered and the properties of synthetic zeolites (molecular sieves) are described with reference to their adsorption isotherms with various gases and vapours. The importance and applications of adsorption isobars and isosteres are briefly explained. Applications of the molecular sieves to vacuum engineering are discussed including the following topics: dry pumping systems and non-refrigerated isolation traps; adsorption of water and oil vapours; and the failure of non-refrigerated traps in mercury diffusion pumps. W Espe et al, Feinwerktechnik, 70 (6)) 1966, 269-273 (in German). 109