The Experts below are selected from a list of 117 Experts worldwide ranked by ideXlab platform
Bertil Sundqvist - One of the best experts on this subject based on the ideXlab platform.
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thermal diffusivity and thermal conductivity of Chromel Alumel and constantan in the range 100 450 k
Journal of Applied Physics, 1992Co-Authors: Bertil SundqvistAbstract:Data are presented for the thermal diffusivity and the thermal conductivity of commercially available Chromel, Alumel, and Constantan alloys, and the specific heat capacity of Alumel, over the temperature range 100 to 450 K. Over this range, the thermal conductivity of all materials increases by more than 50%; room‐temperature values are 17, 29, and 23 W m−1 K−1, respectively. The thermal conductivity data are discussed in terms of simple theory.
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Thermal diffusivity and thermal conductivity of Chromel, Alumel, and Constantan in the range 100–450 K
Journal of Applied Physics, 1992Co-Authors: Bertil SundqvistAbstract:Data are presented for the thermal diffusivity and the thermal conductivity of commercially available Chromel, Alumel, and Constantan alloys, and the specific heat capacity of Alumel, over the temperature range 100 to 450 K. Over this range, the thermal conductivity of all materials increases by more than 50%; room‐temperature values are 17, 29, and 23 W m−1 K−1, respectively. The thermal conductivity data are discussed in terms of simple theory.
P. P. Khramtsov - One of the best experts on this subject based on the ideXlab platform.
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Stable Vortex Structures in Axisymmetric Flame Under Oscillating Combustion
Applied Optical Measurements, 1999Co-Authors: O. G. Martynenko, P. P. KhramtsovAbstract:A structure of a convective torch of axisymmetric flame in combustion of a propane-air mixture was studied experimentally under the conditions of velocity perturbations on the nozzle section. The flow was visualised by a MachZehnder interferometer and also using stroboscopic photography of the flame proper luminescence. Mean temperature distribution in a torch was studied using a Chromel-Alumel thermocouple. The obtained data show the presence of torroidal coherent vortex structures moving downstream that substantially enhance combustion processes and heat transfer in a torch.
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Stable vortex structures in axisymmetric convective torch during oscillating combustion
International Journal of Heat and Mass Transfer, 1996Co-Authors: P. P. Khramtsov, V. S. Burak, O. G. Martynenko, I. A. ShikhAbstract:A structure of a convective torch of axisymmetric flame in combustion of a propane-air mixture was studied experimentally under the conditions of velocity perturbations on the nozzle section. The flow was visualized by a Mach-Zehnder interferometer and also using stroboscopic photography of the flame proper luminescence. Mean temperature distribution in a torch was studied using a Chromel-Alumel thermocouple. The obtained data show the presence of torroidal coherent vortex structures moving downstream that substantially enhance combustion processes and heat transfer in a torch.
David O. Hayward - One of the best experts on this subject based on the ideXlab platform.
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Rate oscillations during partial oxidation of methane over Chromel-Alumel thermocouples
Catalysis Letters, 2001Co-Authors: Xunli Zhang, D. Michael P. Mingos, David O. HaywardAbstract:A Chromel–Alumel thermocouple has been found to catalyse the methane/oxygen reaction, the main products being CO, H2 with some CO2 and H2O. Regular oscillations in both reactants, products and temperature have been observed at temperatures around 700 ○C. Similar behaviour has been obtained using nickel wires.
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Rate oscillations during partial oxidation of methane over Chromel–Alumel thermocouples
Catalysis Letters, 2001Co-Authors: Xunli Zhang, D. Michael P. Mingos, David O. HaywardAbstract:A Chromel–Alumel thermocouple has been found to catalyse the methane/oxygen reaction, the main products being CO, H_2 with some CO_2 and H_2O. Regular oscillations in both reactants, products and temperature have been observed at temperatures around 700 ^○C. Similar behaviour has been obtained using nickel wires.
O. G. Martynenko - One of the best experts on this subject based on the ideXlab platform.
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Stable Vortex Structures in Axisymmetric Flame Under Oscillating Combustion
Applied Optical Measurements, 1999Co-Authors: O. G. Martynenko, P. P. KhramtsovAbstract:A structure of a convective torch of axisymmetric flame in combustion of a propane-air mixture was studied experimentally under the conditions of velocity perturbations on the nozzle section. The flow was visualised by a MachZehnder interferometer and also using stroboscopic photography of the flame proper luminescence. Mean temperature distribution in a torch was studied using a Chromel-Alumel thermocouple. The obtained data show the presence of torroidal coherent vortex structures moving downstream that substantially enhance combustion processes and heat transfer in a torch.
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Stable vortex structures in axisymmetric convective torch during oscillating combustion
International Journal of Heat and Mass Transfer, 1996Co-Authors: P. P. Khramtsov, V. S. Burak, O. G. Martynenko, I. A. ShikhAbstract:A structure of a convective torch of axisymmetric flame in combustion of a propane-air mixture was studied experimentally under the conditions of velocity perturbations on the nozzle section. The flow was visualized by a Mach-Zehnder interferometer and also using stroboscopic photography of the flame proper luminescence. Mean temperature distribution in a torch was studied using a Chromel-Alumel thermocouple. The obtained data show the presence of torroidal coherent vortex structures moving downstream that substantially enhance combustion processes and heat transfer in a torch.
Seil Park - One of the best experts on this subject based on the ideXlab platform.
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Chromel Alumel thermoelectric flow sensor fabricated on dielectric si 3 n 4 sio 2 si 3 n 4 membrane
Journal of Sensor Science and Technology, 2003Co-Authors: Yongmoon Choi, Seil ParkAbstract:A Chromel-Alumel thermoelectric flow sensor using thermal isolation membrane was fabricated. Temperature coefficient of resistance of thin film Pt-heater was about , and Seebeck coefficient of Chromel-Alumel thermocouple was about . The sensor showed that thermoelectric voltage decreased as thermal conductivity of gas increased, and -flow sensitivity increased as heater voltage increased or the distance between heater and thermocouple decreased. When heater voltage was about 2.5 V, -flow sensitivity and thermal response time of the sensor were about and 0.18 sec., respectively. Linear range in flow sensitivity of the flow sensor was wider than that of Bi-Sb flow sensor.
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thin film Chromel Alumel multijunction thermal converter with low output resistance
Journal of Sensor Science and Technology, 2000Co-Authors: Jangkyoo Shin, Seil Park, Sungwon KwonAbstract:Thin-film Chromel-Alumel multijunction thermal converters with a low output resistance of showed approximately the square law-dependent input-output relation. The voltage responsivities were very low with in air and in vacuum, respectively, and the ac-dc voltage transfer error was very large with about +340 ppm in the frequency range of in the case of 1 V-input sinewave rms voltage. It can be concluded that the large transfer error of the thermal converter was mainly caused by the low voltage responsivity and the large heat loss due to low output resistance, which implies that the optimization for small ac-dc transfer error is required.