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Wyszukujesz frazę "Dmytriv, V." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Modelirovanie vremeni istechenija vozdukha iz ogranichennogo prostranstva
    Design of time of expiration of air from a limit space
    Autorzy:
    Dmytriv, V.
    Dmytriv, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/76938.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    milking
    vehicle
    expiration air flow
    speed coefficient
    mechanical energy
    mathematical modelling
    Opis:
    Analytical dependences are resulted for the design of process of pumping out of air from the chambers of variable vacuum gauge pressure of the system pul'sator-milking glass taking into account the law of economy of mass for gas in a subcontrol volume through equalization of mechanical energy of portage of air. Time of pumping out of air is expected in a milking vehicle to nominal vacuum gauge pressure.
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 4
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental studies of duration of air pumping out from the "TEAT CUP - PULSATOR" system
    Autorzy:
    Adamchuk, V.
    Dmytriv, V.
    Dmytriv, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/411277.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    milking unit
    pulsator
    vacuum-gauge pressure
    pumping duration
    isolines
    Opis:
    The article analyzes the results of experimental studies of duration of air pumping out from chambers of the variable vacuum-gauge pressure in the "teat cup - pulsator"system. The study of impact of structurally-technological parameters of milking units on the process of milk ejection and time characteristics of the operating mode was analyzed. The methods of conducting experimental studies of transitive time characteristics of pulsator operating modes based on differentiated study of transitive processes by high-frequency scanning of vacuum-gauge pressure changes while pumping air out from the "teat cup-pulsator" system are given. Results of the study of impact of vacuum pressure and the overflow hole diameter on the duration of air pumping out from chambers of the variable vacuum-gauge pressure system are provided. Results of experimental data are compared with theoretical ones. The analysis of results of experimental studies showed that the pulsator overflow hole diameter has the greatest effect on the duration of air pumping. By reducing the diameter, the duration of air pumping increases nonlinearly. Due to results of comparison of theoretical and experimental studies it was found the deviation of experimental data from the theoretical modeling of the duration of air pumping out from chambers of the variable vacuum-gauge pressure in the"teat cup - pulsator"system. The coefficient of coordination of theoretical dependencies on experimental data to calculate the duration of air pumping was calculated. The analysis of the obtained dependencies of the duration of air pumping out from the system "teat cup - pulsator"system allowed to recommend the most rational options of the pneumatic and electromagnetic pulsator, provided that it will be provision of the mode of smooth shockless opening of milking cup teat rubber at 48 kPa vacuum pressure and the volume of variable vacuum-gauge pressure chambers of the system "teat cup - pulsator" 10-4 m3.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 4; 3-6
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of work of the rotor-type blade pump with revolving stator
    Autorzy:
    Dmytriv, V. T.
    Lanets, O. S.
    Dmytriv, I. V.
    Horodetskyy, I. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106457.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    stojan
    prędkość
    przyspieszenie
    stator
    rotor-type pump
    capacity
    analytical model
    speed
    acceleration
    Opis:
    In the article, the analytical dependences of modelling the cell cross-sectional area between two adjacent blades of a rotary blade pump and capacity for a pump with fixed and rotating stators are given, and analytical dependences are derived to model the power necessary to overcome the friction forces of the blades. The forces acting on the radially placed blade of a rotary pump with a fixed stator (non-rotating or stationary) and a rotating stator are analyzed. Design and technological parameters that influence the pump capacity and power are taken into account. The power required for the movement of the pump blade without taking into account the compression of the air has the opposite character of the change as to the pump capacity The capacity of a rotary pump with a rotating stator is three times higher than that of a stationary stator. The rotary pump with a rotating stator, with six radially spaced blades, consumes 0.854 [kW] less power to overcome the blade friction of 1313 kW The results of modelling of the pump work are given.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 4; 17--28
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytical model of the two-mass above resonance system of the eccentric-pendulum type vibration table
    Autorzy:
    Lanets, O. S.
    Dmytriv, V. T.
    Borovets, V. M.
    Derevenko, I. A.
    Horodetskyy, I. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839714.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    równanie Lagrange'a
    metoda Rosenbrocka
    drgania
    two-mass system
    eccentric-pendulum drive
    Lagrange equation
    Rosenbrock method
    vibration
    Opis:
    The article deals with atwo-mass above resonant oscillatory system of an eccentric-pendulum type vibrating table. Based on the model of a vibrating oscillatory system with three masses, the system of differential equations of motion of oscillating masses with five degrees of freedom is compiled using generalized Lagrange equations of the second kind. For given values of mechanical parameters of the oscillatory system and initial conditions, the autonomous system of differential equations of motion of oscillating masses is solved by the numerical Rosenbrock method. The results of analytical modelling are verified by experimental studies. The two-mass vibration system with eccentric-pendulum drive in resonant oscillation mode is characterized by an instantaneous start and stop of the drive without prolonged transient modes. Parasitic oscillations of the working body, as a body with distributed mass, are minimal at the frequency of forced oscillations.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 116-129
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of equivalent mass and rigidity of continual segment of the inter-resonance vibration machine
    Autorzy:
    Lanets, O. S.
    Dmytriv, V. T.
    Kachur, O. Yu.
    Derevenko, I. A.
    Novitskyi, Yu. Ya.
    Horodetskyy, I. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839834.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    masa zastępcza
    metoda Rayleigha-Ritza
    sztywność zastępcza
    three-mass vibration system
    Rayleigh-Ritz method
    continual segment
    equivalent mass
    equivalent rigidity
    Opis:
    The article deals with a continual segment of an inter-resonance vibration machine. In the form of a solid with distributed parameters this segment combines two defining parameters, namely: the inertial parameter of reactive: masses and appropriate rigidity of elastic coupling. These operation factors are revealed only in dynamic processes and are clearly not included in the parameters of the continual segment. Analytical dependences are developed for modeling of defining parameters of an inter-resonance system, namely: reactive mass and appropriate rigidity of elastic: coupling. Parameters of the reference point of the continual segment passing through its center of velocity are studied. The inertial parameter of the reactive mass and the rigidity of elastic coupling were modeled by the Rayleigh-Ritz method. The reliability of the results of theoretical research was confirmed experimentally and the parameters of the partial frequency of the continual segment were determined.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 70-83
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure data at 150 K for diammonium oxalate monohydrate, [NH4]2[C2O4][H2O]
    Autorzy:
    Mielniczek-Brzóska, E.
    Dmytriv, G.
    Pavlyuk, V.
    Griffin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/410252.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
    Tematy:
    oxalates
    crystal structure
    X-ray diffraction
    Opis:
    The single crystals of perfectly quality of the diammonium oxalate monohydrate, [NH4]2[C2O4][H2O], were obtained by the improved methods of crystal growth from solution. The crystal structure of title compound was studied at 150 K using modern X-ray equipment. At this temperature, as well as at room temperature, this compound crystallizes in the orthorhombic symmetry wiith P21212 space group. The unit cell of the title compound is formed by four amonium cations, two oxalate anions and water molecules, with a 2:1:1 cation-anion-water ratio. At 150 K oxalate ion is twisted by 26.9 (1)°. The similar twist angle (26.6 (4)° was observed at the room temperature. Central carbon-carbon bond in oxalate ion is insignificantly longer (1.568 Å) in comparing with this bond at room temperature (1.559 Å).
    Źródło:
    Chemistry, Environment, Biotechnology; 2013, 16; 73-78
    2083-7097
    Pojawia się w:
    Chemistry, Environment, Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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