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Общее количество найденных документов : 26
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1.

Вид документа : Статья из журнала
Шифр издания : 53/E 97
Автор(ы) : Gurashkin A. L, Starostin A.A., Uimin A.A., Yampol'skiy A. D., Ermakov G. V., Skripov P. V.
Заглавие : Experimental determination of superheated liquid density by the optical fiber method
Место публикации : Journal of Engineering Thermophysics. - 2013. - Vol.22, №3. - С. 194-202
Примечания : Bibliogr. : p. 202 (21 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): optical fiber method--superheated liquid density --liquid-vapor
Аннотация: An experimental approach to determination of the density of liquid superheated with respect to the liquid-vapor equilibrium temperature, including the range of high degrees of superheating, is developed. The approach is based on application of an optical fiber method combined with a pure bubble chamber. Performance of the method for investigation of the refractive index and density for superheated liquids as functions of temperature and pressure is illustrated in experiments with n-hexane as a reference substance for thermophysical measurements. The relative density measurements are performed with a resolution up to 10-4 at a characteristic time of 1 ms. For absolute measurements, the setup should be calibrated by the known data on the liquid density for the saturation line
\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2013, V.22, N 3. P. 194-202.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 53/E 97
Автор(ы) : Gurashkin A. L, Starostin A.A., Uimin A.A., Yampol'skiy A. D., Ermakov G. V., Skripov P. V.
Заглавие : Experimental determination of superheated liquid density by the optical fiber method
Место публикации : Journal of Engineering Thermophysics. - 2013. - Vol.22, №3. - С. 194-202
Примечания : Bibliogr. : p. 202 (21 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): optical fiber method--superheated liquid density --liquid-vapor
Аннотация: An experimental approach to determination of the density of liquid superheated with respect to the liquid-vapor equilibrium temperature, including the range of high degrees of superheating, is developed. The approach is based on application of an optical fiber method combined with a pure bubble chamber. Performance of the method for investigation of the refractive index and density for superheated liquids as functions of temperature and pressure is illustrated in experiments with n-hexane as a reference substance for thermophysical measurements. The relative density measurements are performed with a resolution up to 10-4 at a characteristic time of 1 ms. For absolute measurements, the setup should be calibrated by the known data on the liquid density for the saturation line
\\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2013, V.22, N 3. P. 194-202.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 53/D 67
Автор(ы) : Dmitrin V. I., Maydanik Yu. F., Pastukhov V. G.
Заглавие : Development and investigation of compact cooler using a pulsating heat pipe
Место публикации : High Temperature. - 2010. - Vol. 48, № 4. - С. 565-571
Примечания : Bibliogr. : с. 571 (16 ref)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat pipe-- water--methanol
Аннотация: Results are given of development and investigations of a compact cooler for application in electronics, based on an open-loop oscillating heat pipe. The cooler operation is investigated, where water, methanol, and R141b Freon are used as working fluids under conditions of uniform and concentrated heat input. The effective operation of the device is demonstrated in the heat load range from 5 to 250 W. The “heat source-ambient air” minimal thermal resistance of 0.35°C/W was reached with water under uniform heat load of 250 W. The maximal value of heat load density is 75 W/cm2 with the heat flux concentration on the surface of 1 cm2, where methanol is used as working fluid
\\\\Expert2\\NBO\\High Temperature\\2010, v. 48, N 4, p.565.pdf
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4.

Вид документа : Статья из журнала
Шифр издания : 53/D 67
Автор(ы) : Dmitrin V. I., Maydanik Yu. F., Pastukhov V. G.
Заглавие : Development and investigation of compact cooler using a pulsating heat pipe
Место публикации : High Temperature. - 2010. - Vol. 48, № 4. - С. 565-571
Примечания : Bibliogr. : с. 571 (16 ref)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat pipe-- water--methanol
Аннотация: Results are given of development and investigations of a compact cooler for application in electronics, based on an open-loop oscillating heat pipe. The cooler operation is investigated, where water, methanol, and R141b Freon are used as working fluids under conditions of uniform and concentrated heat input. The effective operation of the device is demonstrated in the heat load range from 5 to 250 W. The “heat source-ambient air” minimal thermal resistance of 0.35°C/W was reached with water under uniform heat load of 250 W. The maximal value of heat load density is 75 W/cm2 with the heat flux concentration on the surface of 1 cm2, where methanol is used as working fluid
\\\\Expert2\\NBO\\High Temperature\\2010, v. 48, N 4, p.565.pdf
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5.

Вид документа :
Шифр издания : 53/A 10
Автор(ы) : Skripov P. V., Smotritskiy A. A., Starostin A.A., Shishkin A. V.
Заглавие : A method of controlled pulse heating: Applications
Место публикации : Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 155-163
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): thermophysical properties --thermal stabilization --high-molecular fluids
Аннотация: This paper is devoted to the state-of-the-art and technical potentials of the pulse heating method for the thin wire probe created in the Ural thermophysical school for studying the kinetics of spontaneous boiling and the related phenomenon of liquid attainable superheating. Special attention is paid to the search for technical means for controlling the power of the probe heating in a pulse experiment with the thermophysical properties of the substance taken into account. Applications of three particular cases are considered: techniques for the constant heating power, the thermal stabilization of the pulse-heated probe, and cooling of the shock-heated probe for investigating the behavior of multicomponent and high-molecular fluids essentially superheated above the temperature of phase equilibrium and/or temperature of molecule thermodestruction in a quasi-static process. Opportunities for application of the method are presented, in particular, for fast detection of volatile admixtures (including their traces) in high-molecular fluids, e.g., in oils of power equipment
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6.

Вид документа :
Шифр издания : 53/A 10
Автор(ы) : Skripov P. V., Smotritskiy A. A., Starostin A.A., Shishkin A. V.
Заглавие : A method of controlled pulse heating: Applications
Место публикации : Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 155-163
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): thermophysical properties --thermal stabilization --high-molecular fluids
Аннотация: This paper is devoted to the state-of-the-art and technical potentials of the pulse heating method for the thin wire probe created in the Ural thermophysical school for studying the kinetics of spontaneous boiling and the related phenomenon of liquid attainable superheating. Special attention is paid to the search for technical means for controlling the power of the probe heating in a pulse experiment with the thermophysical properties of the substance taken into account. Applications of three particular cases are considered: techniques for the constant heating power, the thermal stabilization of the pulse-heated probe, and cooling of the shock-heated probe for investigating the behavior of multicomponent and high-molecular fluids essentially superheated above the temperature of phase equilibrium and/or temperature of molecule thermodestruction in a quasi-static process. Opportunities for application of the method are presented, in particular, for fast detection of volatile admixtures (including their traces) in high-molecular fluids, e.g., in oils of power equipment
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7.

Вид документа : Статья из журнала
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Boltachev G. Sh., Baidakov V. G.
Заглавие : Classical and generalized Gibbs' approaches and the work of critical cluster formation in nucleation theory
Место публикации : Journal of Chemical Physics. - 2006. - Vol. 124, № 19. - С. 194503/1-194503/18
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): clusters
Аннотация: In the theoretical interpretation of the kinetics of first-order phase transitions, thermodynamic concepts developed long ago by Gibbs are widely employed giving some basic qualitative insights into these processes. However, from a quantitative point of view, the results of such analysis, based on the classical Gibbs approach and involving in addition the capillarity approximation, are often not satisfactory. Some progress can be reached here by the van der Waals and more advanced density functional methods of description of thermodynamically heterogeneous systems having, however, its limitations in application to the interpretation of experimental data as well. Moreover, both mentioned theories—Gibbs’ and density functional approaches—lead to partly contradicting each other’s results. As shown in preceding papers, by generalizing Gibbs’ approach, existing deficiencies and internal contradictions of these two well-established theories can be removed and a new generally applicable tool for the interpretation of phase formation processes can be developed. In the present analysis, a comparative analysis of the basic assumptions and predictions of the classical and the generalized Gibbs approaches is given. It is shown, in particular, that—interpreted in terms of the generalized Gibbs approach—the critical cluster as determined via the classical Gibbs approach corresponds not to a saddle but to a ridge point of the appropriate thermodynamic potential hypersurface. By this reason, the classical Gibbs approach (involving the classical capillarity approximation) overestimates as a rule the work of critical cluster formation in nucleation theory and, in general, considerably.
\\\\Expert2\\NBO\\Journal of Chemical Physics\\2006, v.124, p.194503.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Boltachev G. Sh., Baidakov V. G.
Заглавие : Classical and generalized Gibbs' approaches and the work of critical cluster formation in nucleation theory
Место публикации : Journal of Chemical Physics. - 2006. - Vol. 124, № 19. - С. 194503/1-194503/18
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): clusters
Аннотация: In the theoretical interpretation of the kinetics of first-order phase transitions, thermodynamic concepts developed long ago by Gibbs are widely employed giving some basic qualitative insights into these processes. However, from a quantitative point of view, the results of such analysis, based on the classical Gibbs approach and involving in addition the capillarity approximation, are often not satisfactory. Some progress can be reached here by the van der Waals and more advanced density functional methods of description of thermodynamically heterogeneous systems having, however, its limitations in application to the interpretation of experimental data as well. Moreover, both mentioned theories—Gibbs’ and density functional approaches—lead to partly contradicting each other’s results. As shown in preceding papers, by generalizing Gibbs’ approach, existing deficiencies and internal contradictions of these two well-established theories can be removed and a new generally applicable tool for the interpretation of phase formation processes can be developed. In the present analysis, a comparative analysis of the basic assumptions and predictions of the classical and the generalized Gibbs approaches is given. It is shown, in particular, that—interpreted in terms of the generalized Gibbs approach—the critical cluster as determined via the classical Gibbs approach corresponds not to a saddle but to a ridge point of the appropriate thermodynamic potential hypersurface. By this reason, the classical Gibbs approach (involving the classical capillarity approximation) overestimates as a rule the work of critical cluster formation in nucleation theory and, in general, considerably.
\\\\Expert2\\NBO\\Journal of Chemical Physics\\2006, v.124, p.194503.pdf
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9.

Вид документа :
Шифр издания : 53/M 19
Автор(ы) : Maydanik Yu. F.
Заглавие : Loop heat pipes
Место публикации : Applied Thermal Engineering. - 2005. - Vol.25, №5-6. - С. 635-657
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat-transfer device--loop heat pipes --cooling
Аннотация: Loop heat pipes (LHPs) are two-phase heat-transfer devices with capillary pumping of a working fluid. They possess all the main advantages of conventional heat pipes, but owing to the original design and special properties of the capillary structure are capable of transferring heat efficiency for distances up to several meters at any orientation in the gravity field, or to several tens of meters in a horizontal position. Besides, the LHP conception allows a wide variety of different design embodiments, which essentially extends the sphere of functional possibilities and practical application of these devices. The paper is a review of developments, results of theoretical analysis and tests of LHPs performed at the Institute of Thermal Physics and some other organizations. It gives examples of successful application of these highly efficient devices in space technology and electronics
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10.

Вид документа :
Шифр издания : 53/M 19
Автор(ы) : Maydanik Yu. F.
Заглавие : Loop heat pipes
Место публикации : Applied Thermal Engineering. - 2005. - Vol.25, №5-6. - С. 635-657
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat-transfer device--loop heat pipes --cooling
Аннотация: Loop heat pipes (LHPs) are two-phase heat-transfer devices with capillary pumping of a working fluid. They possess all the main advantages of conventional heat pipes, but owing to the original design and special properties of the capillary structure are capable of transferring heat efficiency for distances up to several meters at any orientation in the gravity field, or to several tens of meters in a horizontal position. Besides, the LHP conception allows a wide variety of different design embodiments, which essentially extends the sphere of functional possibilities and practical application of these devices. The paper is a review of developments, results of theoretical analysis and tests of LHPs performed at the Institute of Thermal Physics and some other organizations. It gives examples of successful application of these highly efficient devices in space technology and electronics
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