R 96 Rutin, S. B. Apparatus for studying heat transfer in nanofluids under high-power heating [Electronic resource] / S. B. Rutin, P. V. Skripov // Journal of Engineering Thermophysics. - 2012. - Vol.21, №2. - P144-153. - Bibliogr. : p. 153 (19 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): HEAT TRAHSFER -- HIGH-POWER HEATING -- ELECTRONIC CONTROL Аннотация: A technique of electronic control of the probe heating power is developed using the method of controlled pulse heating of a wire probe, that is a resistance thermometer, was developed. An apparatus implementing this technique was fabricated. The characteristic parameters of the apparatus are as follows: the heating pulse length, 1 to 10 ms; the heat flux density through the surface of a 20 µm probe, 1 to 10 MW/m2; repeatability of selected power value in a series of pulses is on a level of 0.05%. As an example, the constant heating power mode is applied for comparing the thermal resistance of nanofluids in the region of stable states of liquid and superheated (with respect to the liquid-vapor equilibrium temperature of the base liquid) ones. The parameter was the content of Al2O3 nanoparticles in the base liquid (isopropanol). \\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2012, V.31, N 2. P. 144-153.pdf |
I-70 Rutin, S. B. Investigation of not fully stable fluids by the method of controlled pulse heating. 1. Experimental approach [Electronic resource] / S. B. Rutin, P. V. Skripov // Thermochimica Acta. - 2013. - Vol.562. - P70-74. - Bibliogr. : p. 74 (21 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): POWER CONTROL -- PULSE HEATING -- SUPERCRITICAL FLUIDS Аннотация: We are developing an experimental approach to investigation of the properties of not fully stable fluids based on the procedure of controlled pulse heating of a thin wire probe using pulse lengths from 1 to 10 ms. We shall use the term "not fully stable" to refer to fluids that lose their stability in the course of heating (superheated liquids and thermally unstable ones), as well as to initially unstable systems (nanofluids and supercritical ones). In this paper, the peculiarities of the technique and the device operation are discussed. The applicability of the approach is illustrated by demonstration experiments with not fully stable fluids using the constant heating power mode \\\\expert2\\NBO\\Thermochimica Acta\\2013, v. 562, p.70-74.pdf |
H 43 Heat transfer under high-power heating of liquids. 1. Experiment and inverse algorithm [Electronic resource] / S. B. Rutin, A. A. Smotritskiy, A. A. Starostin, Yu. S. Okulovskii, P. V. Skripov // International Journal of Heat and Mass Transfer. - 2013. - Vol.62, №1. - P135-141. - Bibliogr. : p. 141 (29 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): GENETIC ALGORITHM -- HEAT CAPACITY -- PULSE HEATING Аннотация: A new approach to fluids behavior study in the course of highpower heating has been developed by us. The approach combines experimental method of controlled pulse heating of a wire probe and numerical method of thermophysical properties temperature dependencies recovery from the experimental data. Short (millisecond) characteristic time scale allows working with short-lived fluids, including superheated (with respect to the liquid-vapor equilibrium temperature and/or to the temperature of thermal decomposition onset) ones. Numerical method gives a set of inverse heat conduction problem solutions, based on the results of single pulse experiment. Numerical technique, based on the heat transfer parameters optimization model, is built using genetic algorithms. The approach was applied to saturated hydrocarbons in the temperature range 300-625 K \\\\expert2\\NBO\\International Journal of Heat and Mass Transfer\\2013, v.62, p.135-141.pdf |
R 96 Rutin, S. B. Heat transfer in supercritical fluids under pulse heating regime [Electronic resource] / S. B. Rutin, P. V. Skripov // International Journal of Heat and Mass Transfer. - 2013. - Vol.57, № 1. - P126-130. - Bibliogr. : p. 130 (12 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL POINTS -- HEAT FLUX DENSITY -- HEATING POWER Аннотация: The peculiarities of the heat transfer in supercritical fluids under short characteristic times scale has been studied experimentally. The constant heating power mode for the technique of controlled pulse heating of a wire probe was used for isobaric penetrating into the region of supercritical temperatures. The pressure range was (1-6)p/p and the temperature range was (0.6-1.6), where subscript "c" corresponds to the critical point of a substance. The characteristic pulse length was 10 ms; the heat flux density through the probe surface was from 1 MW/m2 to 10 MW/m2. A sharp decrease in the heat transfer intensity for supercritical fluids with respect to that of subcritical liquids has been obtained. A high sensitivity of the heat transfer pattern to the reduced pressure values was revealed as well \\\\expert2\\NBO\\International Journal of Heat and Mass Transfer\\2013, v.57, p.126-130.pdf |
R 96 Rutin, S. B. Apparatus for studying heat transfer in nanofluids under high-power heating [Electronic resource] / S. B. Rutin, P. V. Skripov // Journal of Engineering Thermophysics. - 2012. - Vol.21, №2. - P144-153. - Bibliogr. : p. 153 (19 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): HEAT TRAHSFER -- HIGH-POWER HEATING -- ELECTRONIC CONTROL Аннотация: A technique of electronic control of the probe heating power is developed using the method of controlled pulse heating of a wire probe, that is a resistance thermometer, was developed. An apparatus implementing this technique was fabricated. The characteristic parameters of the apparatus are as follows: the heating pulse length, 1 to 10 ms; the heat flux density through the surface of a 20 µm probe, 1 to 10 MW/m2; repeatability of selected power value in a series of pulses is on a level of 0.05%. As an example, the constant heating power mode is applied for comparing the thermal resistance of nanofluids in the region of stable states of liquid and superheated (with respect to the liquid-vapor equilibrium temperature of the base liquid) ones. The parameter was the content of Al2O3 nanoparticles in the base liquid (isopropanol). \\\\expert2\\NBO\\Journal of Engineering Thermophysics\\2012, V.31, N 2. P. 144-153.pdf |
I-70 Rutin, S. B. Investigation of not fully stable fluids by the method of controlled pulse heating. 1. Experimental approach [Electronic resource] / S. B. Rutin, P. V. Skripov // Thermochimica Acta. - 2013. - Vol.562. - P70-74. - Bibliogr. : p. 74 (21 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): POWER CONTROL -- PULSE HEATING -- SUPERCRITICAL FLUIDS Аннотация: We are developing an experimental approach to investigation of the properties of not fully stable fluids based on the procedure of controlled pulse heating of a thin wire probe using pulse lengths from 1 to 10 ms. We shall use the term "not fully stable" to refer to fluids that lose their stability in the course of heating (superheated liquids and thermally unstable ones), as well as to initially unstable systems (nanofluids and supercritical ones). In this paper, the peculiarities of the technique and the device operation are discussed. The applicability of the approach is illustrated by demonstration experiments with not fully stable fluids using the constant heating power mode \\\\expert2\\NBO\\Thermochimica Acta\\2013, v. 562, p.70-74.pdf |
H 43 Heat transfer under high-power heating of liquids. 1. Experiment and inverse algorithm [Electronic resource] / S. B. Rutin, A. A. Smotritskiy, A. A. Starostin, Yu. S. Okulovskii, P. V. Skripov // International Journal of Heat and Mass Transfer. - 2013. - Vol.62, №1. - P135-141. - Bibliogr. : p. 141 (29 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): GENETIC ALGORITHM -- HEAT CAPACITY -- PULSE HEATING Аннотация: A new approach to fluids behavior study in the course of highpower heating has been developed by us. The approach combines experimental method of controlled pulse heating of a wire probe and numerical method of thermophysical properties temperature dependencies recovery from the experimental data. Short (millisecond) characteristic time scale allows working with short-lived fluids, including superheated (with respect to the liquid-vapor equilibrium temperature and/or to the temperature of thermal decomposition onset) ones. Numerical method gives a set of inverse heat conduction problem solutions, based on the results of single pulse experiment. Numerical technique, based on the heat transfer parameters optimization model, is built using genetic algorithms. The approach was applied to saturated hydrocarbons in the temperature range 300-625 K \\\\expert2\\NBO\\International Journal of Heat and Mass Transfer\\2013, v.62, p.135-141.pdf |
R 96 Rutin, S. B. Heat transfer in supercritical fluids under pulse heating regime [Electronic resource] / S. B. Rutin, P. V. Skripov // International Journal of Heat and Mass Transfer. - 2013. - Vol.57, № 1. - P126-130. - Bibliogr. : p. 130 (12 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL POINTS -- HEAT FLUX DENSITY -- HEATING POWER Аннотация: The peculiarities of the heat transfer in supercritical fluids under short characteristic times scale has been studied experimentally. The constant heating power mode for the technique of controlled pulse heating of a wire probe was used for isobaric penetrating into the region of supercritical temperatures. The pressure range was (1-6)p/p and the temperature range was (0.6-1.6), where subscript "c" corresponds to the critical point of a substance. The characteristic pulse length was 10 ms; the heat flux density through the probe surface was from 1 MW/m2 to 10 MW/m2. A sharp decrease in the heat transfer intensity for supercritical fluids with respect to that of subcritical liquids has been obtained. A high sensitivity of the heat transfer pattern to the reduced pressure values was revealed as well \\\\expert2\\NBO\\International Journal of Heat and Mass Transfer\\2013, v.57, p.126-130.pdf |