Browsing by Author "Pertsevyi, Vitalii A."

Now showing 1 - 3 of 3
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    Experimental Study For the Process of the Borehole Thermal Reaming by Means of the Angular Plasmatron
    (EDP Sciences, 2019) Voloshyn, Oleksii I.; Potapchuk, Iryna Yu.; Yemelianenko, Volodymyr; Zhovtonoha, Mykola M.; Pertsevyi, Vitalii A.
    EN: Full-scale experimental study of the rock spallation by means of plasma jets is carried out. The aim of the experimental study was the measurement of the thermal power of plasma, weight of the rock spalls and duration of the plasma jets influence on the borehole surface. For the weight measurement of the rock spalls VT-200 analytical balance was used. In experimental study plasma jets flow out directly into the borehole of the granite block. The borehole and nozzles parameters of the plasmatron are complied with geometrical similarity. Experimental data are processed in the form of the energy consumption dependence of the thermal reaming of the borehole from the duration of the thermal treatment of the borehole surface. The results of the study could be applied to the borehole drilling processes.
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    Experimental Study of the Thermochemical Treatment of the Low-Grade Coal Prior to Boiler Combustion at Coal-Fired Power Station
    (EDP Sciences, 2019) Yemelianenko, Volodymyr I.; Pertsevyi, Vitalii A.; Zhevzhyk, Oleksandr V.; Potapchuk, Iryna Yu.; Lutai, Oleksandr
    EN: Abstract. Analysis of the perspectives of the coal fuel for thermal power plants is carried out. The necessity of the experimental study for temperature measurement in the boiler furnace. The results of the experimental study are presented: temperature change over time at the burner outlet for different constant pressure value of the backlighting gas, dependence of the temperature at the burner outlet from the backlighting gas pressure for constant concentration value of pulverized coal in coal-air mixture, dependence of the temperature at the burner outlet from the concentration of pulverized coal in coal-air mixture for constant value of the backlighting gas pressure, temperature measurements for constant backlighting gas pressure value, constant value of the concentration of pulverized coal in coal-air mixture when plasmatron is switched and operates for some time range. The results of the study could be applied to the solid fuel treatment for different thermal units.
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    Study of Drag Reduction on a Hypersonic Vehicle Using Aerospike
    (IGI Global, 2022) Shankar R., Naren; Angelin S., Irish; Pertsevyi, Vitalii A.
    ENG: Humans longing to fly higher and quicker have prompted the improvement of hypersonic vehicles. Typically, hypersonic streams are described by high temperature field and a thin layer of shock close to the object wall or the body surface. To ease the reduction of thermal loads, a blunt nose is forced in a hypersonic vehicle which is more imperative. In any case, increase in the wave drag is one of a quick outcome of a constrained bluntness. Consequently, investigation in hypersonic field is constantly fixated on the wave drag decrease. The entire flow features around the blunt body gets changed because of the attachment of spike infront of the vehicle. This chapter aims to give a detailed review of a hypersonic vehicle that involves an aerospike design in front of the blunt body which tends to reduce the drag at the forebody. Views of various researchers are investigated and efforts are taken to summarize the reported results on how the drag has been reduced using aerospike technique.