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Общее количество найденных документов : 132
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1.
Инвентарный номер: нет.
   
   A 53


   
    An experimental investigation and modelling of the thermodynamic properties of R245fa/compressor oil solutions [Текст] / S. N. Ancherbak, Yu. Semenyuk, P. V. Skripov, V. P. Zhelezny // Compressors 2006, International Conference on Compressors and Coolants, 6th, Casta Papiernicka, Slovakia, Sept. 27-29, 2006. - 2006. - С. zhelezny245/1-zhelezny245/9
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
THERMOPHYSICAL PROPERTIES

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2.
Инвентарный номер: нет.
   
   A 53


   
    An experimental investigation and modelling of the thermodynamic properties of R245fa/compressor oil solutions [Текст] / S. N. Ancherbak, Yu. Semenyuk, P. V. Skripov, V. P. Zhelezny // Compressors 2006, International Conference on Compressors and Coolants, 6th, Casta Papiernicka, Slovakia, Sept. 27-29, 2006. - 2006. - С. zhelezny245/1-zhelezny245/9
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
THERMOPHYSICAL PROPERTIES

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3.
Инвентарный номер: нет.
   
   B 74


    Boltachev, G. Sh.
    Analytical model of a corona discharge from a conical electrode under saturation [Электронный ресурс] / G. Sh. Boltachev, N. M. Zubarev // Technical Physics. - 2012. - Vol.57, №11. - P1493-1502
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CONICAL ELECTRODE -- ANALYTICAL MODEL -- ELECTRIC FIELD
Аннотация: Exact partial solutions are found for the electric field distribution in the outer region of a stationary unipolar corona discharge from an ideal conical needle in the space-charge-limited current mode with allowance for the electric field dependence of the ion mobility. It is assumed that only the very tip of the cone is responsible for the discharge, i. e., that the ionization zone is a point. The solutions are obtained by joining the spherically symmetric potential distribution in the drift space and the self-similar potential distribution in the space-charge-free region. Such solutions are outside the framework of the conventional Deutsch approximation, according to which the space charge insignificantly influences the shape of equipotential surfaces and electric lines of force. The dependence is derived of the corona discharge saturation current on the apex angle of the conical electrode and applied potential difference. A simple analytical model is suggested that describes drift in the point-plane electrode geometry under saturation as a superposition of two exact solutions for the field potential. In terms of this model, the angular distribution of the current density over the massive plane electrode is derived, which agrees well with Warburg's empirical law

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4.
Инвентарный номер: нет.
   
   B 74


    Boltachev, G. Sh.
    Analytical model of a corona discharge from a conical electrode under saturation [Электронный ресурс] / G. Sh. Boltachev, N. M. Zubarev // Technical Physics. - 2012. - Vol.57, №11. - P1493-1502
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CONICAL ELECTRODE -- ANALYTICAL MODEL -- ELECTRIC FIELD
Аннотация: Exact partial solutions are found for the electric field distribution in the outer region of a stationary unipolar corona discharge from an ideal conical needle in the space-charge-limited current mode with allowance for the electric field dependence of the ion mobility. It is assumed that only the very tip of the cone is responsible for the discharge, i. e., that the ionization zone is a point. The solutions are obtained by joining the spherically symmetric potential distribution in the drift space and the self-similar potential distribution in the space-charge-free region. Such solutions are outside the framework of the conventional Deutsch approximation, according to which the space charge insignificantly influences the shape of equipotential surfaces and electric lines of force. The dependence is derived of the corona discharge saturation current on the apex angle of the conical electrode and applied potential difference. A simple analytical model is suggested that describes drift in the point-plane electrode geometry under saturation as a superposition of two exact solutions for the field potential. In terms of this model, the angular distribution of the current density over the massive plane electrode is derived, which agrees well with Warburg's empirical law

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5.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable Superheat of Argon-Helium, Argon-Neon Solutions [Text] / V. G. Baidakov, A. M. Kaverin, V. N. Andbaeva // Journal of Physical Chemistry B. - 2008. - Vol. 112, № 41. - P12973-12975
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ARGON
Аннотация: The method of lifetime measurement has been used to investigate the kinetics of spontaneous boiling-up of superheated argonhelium and argon?neon solutions. Experiments were made at a pressure of p = 1.5 MPa and concentrations up to 0.33 mol% in the range of nucleation rates from 104 to 108 s1 m3. The homogeneous nucleation regime has been distinguished. With good agreement between experimental data and homogeneous nucleation theory in temperature and concentration dependences of the nucleation rate, a systematic underestimation by 0.250.34 K has been revealed in superheat temperatures over the saturated line attained by experiment as compared with theoretical values calculated in a macroscopic approximation. The revealed disagreement between theory and experiment is connected with the dependence of the properties of new-phase nuclei on their size.

\\EXPERT2\NBO\Journal of Physical Chemistry B\2008, v.112, p.12973.pdf
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6.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable Superheat of Argon-Helium, Argon-Neon Solutions [Text] / V. G. Baidakov, A. M. Kaverin, V. N. Andbaeva // Journal of Physical Chemistry B. - 2008. - Vol. 112, № 41. - P12973-12975
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ARGON
Аннотация: The method of lifetime measurement has been used to investigate the kinetics of spontaneous boiling-up of superheated argonhelium and argon?neon solutions. Experiments were made at a pressure of p = 1.5 MPa and concentrations up to 0.33 mol% in the range of nucleation rates from 104 to 108 s1 m3. The homogeneous nucleation regime has been distinguished. With good agreement between experimental data and homogeneous nucleation theory in temperature and concentration dependences of the nucleation rate, a systematic underestimation by 0.250.34 K has been revealed in superheat temperatures over the saturated line attained by experiment as compared with theoretical values calculated in a macroscopic approximation. The revealed disagreement between theory and experiment is connected with the dependence of the properties of new-phase nuclei on their size.

\\EXPERT2\NBO\Journal of Physical Chemistry B\2008, v.112, p.12973.pdf
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7.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable superheating of liquefied gases and their solutions (Review Article) [Electronic resource] / V. G. Baidakov // Low Temperature Physics . - 2013. - Vol.39, №8. - P643-664. - Bibliogr. : p. 663-664 (80 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETICS -- BOILING-UP -- QUANTUM NUCLEATION
Аннотация: This review addresses the kinetics of spontaneous boiling-up of liquefied gases and their solutions. It discusses the theories of thermal and quantum nucleation in metastable liquids. The experimental methods for studying the nucleation kinetics are outlined. The experimental data on the attainable superheating temperature for cryogenic liquids and solutions of liquefied gases are presented in a wide range of pressures, including negative ones. The properties of new-phase nuclei near the boundary of attainable superheating are discussed. The kinetics of initiated and heterogeneous nucleation is considered. The experimental data on detection of quantum tunneling of nuclei are presented. The experimental data are compared with the theories of thermal and quantum nucleation

\\\\expert2\\NBO\\Low Temperature Physics\\2013, v.39, N 8, p.643-664.pdf
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8.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable superheating of liquefied gases and their solutions (Review Article) [Electronic resource] / V. G. Baidakov // Low Temperature Physics . - 2013. - Vol.39, №8. - P643-664. - Bibliogr. : p. 663-664 (80 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETICS -- BOILING-UP -- QUANTUM NUCLEATION
Аннотация: This review addresses the kinetics of spontaneous boiling-up of liquefied gases and their solutions. It discusses the theories of thermal and quantum nucleation in metastable liquids. The experimental methods for studying the nucleation kinetics are outlined. The experimental data on the attainable superheating temperature for cryogenic liquids and solutions of liquefied gases are presented in a wide range of pressures, including negative ones. The properties of new-phase nuclei near the boundary of attainable superheating are discussed. The kinetics of initiated and heterogeneous nucleation is considered. The experimental data on detection of quantum tunneling of nuclei are presented. The experimental data are compared with the theories of thermal and quantum nucleation

\\\\expert2\\NBO\\Low Temperature Physics\\2013, v.39, N 8, p.643-664.pdf
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9.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable superheating of liquefied gases and their solutions : review [Electronic resource] / V. G. Baidakov // Fizika Nizkikh Temperatur. - 2013. - Vol.39, №8. - P835-862. - Bibliogr. : p. 861-862 (87 ref)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CAVITATION -- CRYOGENIC LIQUIDS -- META-STABLE STATE
Аннотация: The review is mainly concerned with the kinetics of spontaneous boiling-up of liquefied gases and their solutions. It examines the theories of thermofluctuation and quantum nucleation in metastable liquids. The methods of experimental investigation of nucleation kinetics are given. The experimental data on temperature of attainable superheating of cryogenic liquids and solutions of liquefied gases are presented for a wide range of pressures, including negative ones. The properties of new-phase nuclei near the attainable super-heating boundary are discussed. The kinetics of initiated and heterogeneous nucleation is considered. The experimental data on detection of quantum tunneling of nuclei are given. Experimental data are compared with the theories of thermofluctuation and quantum nucleation

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10.
Инвентарный номер: нет.
   
   B 16


    Baidakov, V. G.
    Attainable superheating of liquefied gases and their solutions : review [Electronic resource] / V. G. Baidakov // Fizika Nizkikh Temperatur. - 2013. - Vol.39, №8. - P835-862. - Bibliogr. : p. 861-862 (87 ref)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CAVITATION -- CRYOGENIC LIQUIDS -- META-STABLE STATE
Аннотация: The review is mainly concerned with the kinetics of spontaneous boiling-up of liquefied gases and their solutions. It examines the theories of thermofluctuation and quantum nucleation in metastable liquids. The methods of experimental investigation of nucleation kinetics are given. The experimental data on temperature of attainable superheating of cryogenic liquids and solutions of liquefied gases are presented for a wide range of pressures, including negative ones. The properties of new-phase nuclei near the attainable super-heating boundary are discussed. The kinetics of initiated and heterogeneous nucleation is considered. The experimental data on detection of quantum tunneling of nuclei are given. Experimental data are compared with the theories of thermofluctuation and quantum nucleation

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