Zberovskiy V.V., Polyakov Yu.Е., Narivskiy R.N. Investigation of dynamic parameters implemented by the generator of elastic vibrations at initiation and damping of cavitation liquid flow

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Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 124

 

Geoteh. meh. 2015, 124, 57-72

INVESTIGATION OF DYNAMIC PARAMETERS IMPLEMENTED BY THE GENERATOR OF ELASTIC VIBRATIONS AT INITIATION AND DAMPING OF CAVITATION LIQUID FLOW

¹Zberovskiy V.V., ¹Polyakov Yu.Е., ¹Narivskiy R.N.

¹IGTM NAS of Ukraine

UDC 621.313.12-752.001.5:532.528

Abstract. This article examines the relationship of patterns of formation of frequency and liq-uid amplitude of self-oscillation in the simulator borehole at low backup pressure, namely to 1.6 MPa. These studies were carried out to determine the initiation of the cavitation process of liquid flow in the early stages that occur before the steady operating mode. Analysis of the findings shows that the change in the opening angle of the diffuser leads to a change in the range and frequency of self-oscillation, although the nature of quality of the picture changes remains the same. So at startup pumping unit and in the absence of backup pressure, independently of the opening angle of the dif-fuser there are established range and frequency of self-oscillation. These values correspond to the initial (its own) value of the generator, which can be defined as zero or idling operation of the gen-erator. During conducted tests it was found that the most sustainable and efficient is the process of converting a static flow in a pulse at the constructive parameters of generator GK-2.5 with lкр = 3,0 mm and β=20º.

Keywords: generator of cavitation, liquid, low backup pressure, cavitation parameter, construc-tive parameters, the opening angle of the diffuser.

 

REERENCES

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About the authors

Zberovskiy Vasyl Vladislavovych, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Narivskiy Roman Nikolaevich, Master of Sciences, Junior Researcher in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine.

Polyakov Yuriy Evgenevich, Master of Sciences, Doctoral Student, principal еngineer in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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