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Efremova

Some Cavitation Properties of Liquids
Engineering Education # 03, March 2016
DOI: 10.7463/0316.0835344
pp. 12-36
A Hydro-pneumatic Suspension of the Horizontally Balanced Loading Platform
Machines and Plants: Design and Exploiting # 05, October 2015
DOI: 10.7463/aplts.0515.0821039
pp. 13-32
External Cylindrical Nozzle with Controlled Vacuum
Machines and Plants: Design and Exploiting # 03, June 2015
DOI: 10.7463/aplts.0315.0783011
pp.9--28
High Viscosity Liquid Flow through the Round Orifices at Small Reynold’s Numbers
Aerospace Scientific Journal # 01, January 2015
DOI: 10.7463/aersp.0115.0775178
pp. 31-57

Engineering Bulletin # 11, November 2013

Engineering Bulletin # 10, October 2013
Light emission and electrical process in the cavitating flow of mineral oil
Engineering Education # 03, March 2013
DOI: 10.7463/0313.0535547
During the research of cavitation processes in the mineral oil flow inside a transparent model of an orifice restrictor steady light emission in the blue range of the visible colour spectrum was revealed. Intensity of light emission grew as the flow velocity increased. Upon reaching the threshold value of the flow velocity, light emission became pulsatile; and when velocity continued to grow, emission stopped. Experiments revealed the presence of mineral oil of intensive electrical processes in the cavitating flow. The created experimental setup allowed to make a quantitative assessment of electric processes and to record the dynamics of light emission. Hypothesis that explains the physics of discovered effects was proposed along with assumptions about possible influence on the working liquid for hydraulic drives and wall materials of narrow channels of hydro automatic equipment elements and devices.  
77-30569/310908 Compressor-doser based on the pneumatic cylinder
Engineering Education # 02, February 2012
Problems with precise estimation of volume and weight flows of compressed air, when investigating pneumatic automation elements’ and devices’ characteristics, are widely known. Precise compressor-doser was designed on the basis of pneumatic cylinder; it allowed to give objective estimation of weight flow of compressed air, when determining flow-drop characteristics of orifice meters. It was shown that flow gages had stable linear characteristics in the case when estimation of flow based on the measurement of the pressure at the entrance of the orifice meter at the stage of exhaustion.
 
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