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Общее количество найденных документов : 250
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1.

Вид документа : Статья из журнала
Шифр издания : 53/C 51
Автор(ы) : Chernysheva M. A., Maydanik Yu. F.
Заглавие : 3D-model for heat and mass transfer simulation in flat evaporator of copper-water loop heat pipe
Место публикации : Applied Thermal Engineering. - 2012. - Vol.33-34, №1. - С. 124-134
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): evaporation--flat evaporator--mathematical model
Аннотация: This paper presents a three-dimension mathematical model of a flat evaporator of a loop heat pipe which takes into account the peculiarities of the evaporator configuration and the specific character of a one-side heat load supply. All the main structural elements of the evaporator, such as its body, wick, vapor-removal grooves, barrier layer and compensation chamber, are included in the model. The intensity of heat-exchange processes during evaporation in the active zone is determined by local drops between the temperature at the wick surface and the vapor temperature. The effects of drying the wick in the evaporation zone are also taken into account. The problem was solved by a numerical method. The results of calculations are presented for a copper evaporator and water as a working fluid in the heat load range from 20 to 1100 W. A comparative analysis of calculated and experimental data has been made
\\\\expert2\\NBO\\Applied Thermal Engineering\\2012, v. 33-34, p.124.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 53/C 51
Автор(ы) : Chernysheva M. A., Maydanik Yu. F.
Заглавие : 3D-model for heat and mass transfer simulation in flat evaporator of copper-water loop heat pipe
Место публикации : Applied Thermal Engineering. - 2012. - Vol.33-34, №1. - С. 124-134
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): evaporation--flat evaporator--mathematical model
Аннотация: This paper presents a three-dimension mathematical model of a flat evaporator of a loop heat pipe which takes into account the peculiarities of the evaporator configuration and the specific character of a one-side heat load supply. All the main structural elements of the evaporator, such as its body, wick, vapor-removal grooves, barrier layer and compensation chamber, are included in the model. The intensity of heat-exchange processes during evaporation in the active zone is determined by local drops between the temperature at the wick surface and the vapor temperature. The effects of drying the wick in the evaporation zone are also taken into account. The problem was solved by a numerical method. The results of calculations are presented for a copper evaporator and water as a working fluid in the heat load range from 20 to 1100 W. A comparative analysis of calculated and experimental data has been made
\\\\expert2\\NBO\\Applied Thermal Engineering\\2012, v. 33-34, p.124.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skripov V. P., Faizullin M. Z.
Заглавие : A Semiempirical Method for Calculating the Surface Density of Gibbs Energy at the Crystal-Liquid Interface
Место публикации : Zhurnal Fizicheskoy Khimii. - 2001. - Vol. 75, N 4. - С. 670-674: il.
Примечания : Bibliogr.: p. 674 (24 n.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): methods for calculating--surface density--gibbs energy--ar--na--sn--hg--pb
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4.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skripov V. P., Faizullin M. Z.
Заглавие : A Semiempirical Method for Calculating the Surface Density of Gibbs Energy at the Crystal-Liquid Interface
Место публикации : Zhurnal Fizicheskoy Khimii. - 2001. - Vol. 75, N 4. - С. 670-674: il.
Примечания : Bibliogr.: p. 674 (24 n.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): methods for calculating--surface density--gibbs energy--ar--na--sn--hg--pb
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5.

Вид документа :
Шифр издания : 53/P 31
Автор(ы) : Pastukhov V. G., Maydanik Yu. F., Fershtater Y. G.
Заглавие : Adaptation of loop heat pipes to zero-g conditions
Место публикации : 6th European Symposium on Space Environmental Control Systems: Noordwijk, Netherlands, 20-22 may 1997 . - 1997. - Vol.400. - С. 385-391
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): loop heat pipes --heat-transport --thermocapillary phenomena
Аннотация: Loop heat pipes (LHPs) posses a great variety of valuable properties, which make them quite promising for application both on the Earth and in space. Among these are the LHP high heat-transport capacity at an any orientation in the field of mass forces, good mass-and-size parameters and the possibility of an arbitrary configuration of transport lines. At the same time such a drawback of LHPs of the conventional type as the instability of start up and operation in the region of low heat loads reduces their performance. The problem is connected, in a general case, with the unfavourable distribution of the vapor and the liquid phases of the working fluid in the evaporator. There is reason to believe that the LHP operation can also be significantly affected by zero-g conditions, in which the distribution of a working fluid is pre-determined only by the action of surface forces and the thermocapillary phenomena. The paper performs a general analysis of the necessary conditions imposed on the construction of LHP and some designs that contribute to the retention of serviceability in zero-g conditions at low heat loads. It gives the results of laboratory investigations of an adapted ammonia LHP with a heat-transfer capacity up to 2 kWxm
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6.

Вид документа :
Шифр издания : 53/P 31
Автор(ы) : Pastukhov V. G., Maydanik Yu. F., Fershtater Y. G.
Заглавие : Adaptation of loop heat pipes to zero-g conditions
Место публикации : 6th European Symposium on Space Environmental Control Systems: Noordwijk, Netherlands, 20-22 may 1997 . - 1997. - Vol.400. - С. 385-391
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): loop heat pipes --heat-transport --thermocapillary phenomena
Аннотация: Loop heat pipes (LHPs) posses a great variety of valuable properties, which make them quite promising for application both on the Earth and in space. Among these are the LHP high heat-transport capacity at an any orientation in the field of mass forces, good mass-and-size parameters and the possibility of an arbitrary configuration of transport lines. At the same time such a drawback of LHPs of the conventional type as the instability of start up and operation in the region of low heat loads reduces their performance. The problem is connected, in a general case, with the unfavourable distribution of the vapor and the liquid phases of the working fluid in the evaporator. There is reason to believe that the LHP operation can also be significantly affected by zero-g conditions, in which the distribution of a working fluid is pre-determined only by the action of surface forces and the thermocapillary phenomena. The paper performs a general analysis of the necessary conditions imposed on the construction of LHP and some designs that contribute to the retention of serviceability in zero-g conditions at low heat loads. It gives the results of laboratory investigations of an adapted ammonia LHP with a heat-transfer capacity up to 2 kWxm
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7.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kuvyrkin G. N.
Заглавие : An alternative method for the numerical solution of the integrodifferential heat-conduction equation
Место публикации : USSR Computational Mathematics and Mathematical Physics. - 1990. - Vol.30, №1. - С. 118-122
Примечания : Bibliogr. : p.
ББК : 53
Аннотация: An algorithm is developed using the finite-element method for calculating the temperature field in a bounded domain allowing for the finite rate of propagation of heat during pulsed surface heating. An accumulating finite element mesh is used in order to remove the oscillations in the solution behind the temperature wave front. An investigation of the error in the calculations enables a rational approach to be taken to the choice of parameters in the integration scheme. Calculations of the propagation and reflection of the temperature waves due to pulsed surface charging are presented
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8.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kuvyrkin G. N.
Заглавие : An alternative method for the numerical solution of the integrodifferential heat-conduction equation
Место публикации : USSR Computational Mathematics and Mathematical Physics. - 1990. - Vol.30, №1. - С. 118-122
Примечания : Bibliogr. : p.
ББК : 53
Аннотация: An algorithm is developed using the finite-element method for calculating the temperature field in a bounded domain allowing for the finite rate of propagation of heat during pulsed surface heating. An accumulating finite element mesh is used in order to remove the oscillations in the solution behind the temperature wave front. An investigation of the error in the calculations enables a rational approach to be taken to the choice of parameters in the integration scheme. Calculations of the propagation and reflection of the temperature waves due to pulsed surface charging are presented
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9.

Вид документа : Статья из журнала
Шифр издания : 53/C 51
Автор(ы) : Chernysheva M. A., Pastukhov V. G., Maydanik Yu. F.
Заглавие : Analysis of heat exchange in the compensation chamber of a loop heat pipe
Место публикации : Energy . - 2013. - С. Article in Press
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): compensation chamber--flat evaporator--heat-and-mass transfer--loop heat pipes
Аннотация: A three-dimensional heat-and-mass transfer model of a flat evaporator of a loop heat pipe has been developed for investigating heat-and-mass in a compensation chamber filled with a liquid. Numerical simulation was implemented using EFDLab® software package in order to predict the temperature distribution of the flat evaporator of a copper-water LHP (loop heat pipe) as well as the flow streamline and velocity field in the compensation chamber as a function of heat load. A computer simulation makes it possible to evaluate the heat exchange at the inner surface of the compensation chamber. Heat exchange data were used as a boundary condition in researching the problem of the drying effect of a wick and a transformation of the evaporating front in the active zone of the flat evaporator. © 2013 Elsevier Ltd. All rights reserved
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10.

Вид документа : Статья из журнала
Шифр издания : 53/C 51
Автор(ы) : Chernysheva M. A., Pastukhov V. G., Maydanik Yu. F.
Заглавие : Analysis of heat exchange in the compensation chamber of a loop heat pipe
Место публикации : Energy . - 2013. - С. Article in Press
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): compensation chamber--flat evaporator--heat-and-mass transfer--loop heat pipes
Аннотация: A three-dimensional heat-and-mass transfer model of a flat evaporator of a loop heat pipe has been developed for investigating heat-and-mass in a compensation chamber filled with a liquid. Numerical simulation was implemented using EFDLab® software package in order to predict the temperature distribution of the flat evaporator of a copper-water LHP (loop heat pipe) as well as the flow streamline and velocity field in the compensation chamber as a function of heat load. A computer simulation makes it possible to evaluate the heat exchange at the inner surface of the compensation chamber. Heat exchange data were used as a boundary condition in researching the problem of the drying effect of a wick and a transformation of the evaporating front in the active zone of the flat evaporator. © 2013 Elsevier Ltd. All rights reserved
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