ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-469-4
ISBN Online: 978-1-56700-470-0
Second Thermal and Fluids Engineering Conference
THE HEAT TRANSFER MODEL OF COATING VOLATILE RESISTANCE AND RADIATION CHARACTERISTICS TEST DEVICE
摘要
Oxidation coating is widely used in high temperature equipment, the heat transfer mechanism research of
oxidation coating has a slow progress. As a heating technology, direct resistance heating has been widely used in test equipment which can measure volatile resistance and radiation characteristics over 2000 °C. Direct
resistance heating is considered as a comparatively accurate method for the measurement of very high temperatures. The estimation of total emissivity is based on various computational methods derived by assuming
that the temperature is uniform in the central part of the specimen. The validity of this approach was verified
when specimens with large cross sections and when the temperature on the specimen surface was measured. A
numerical model was established with the temperature variations across the specimen was taken into
consideration. The mathematical model established can be used in the simulation experiments to access the
magnitude of specific phenomena due to the temperature gradient inside the specimen. The simulation results
will improve the accuracy of interception of sample and contribute to the development of the equipment.