PARAMETRIC IDENTIFICATION OF THE THERMAL CONDUCTIVITY COEFFICIENT UNDER HIGH-INTENSITY HEAT HEATING, TAKING INTO ACCOUNT THERMAL DECOMPOSITION
https://doi.org/10.26583/vestnik.2022.19
Abstract
One of the primary tasks of thermal design is the compilation of an adequate thermal physical and mathematical model to ensure its regular thermal regime. In this paper, we consider a sequential method for determining the complex of thermophysical characteristics as functions of temperature during its ground-based thermal processing in natural conditions. The test object is subjected to high-intensity unidirectional thermal heating, which is typical during the descent and exit of spacecraft from the atmosphere of various planets. This problem is solved as a problem of finding a global minimum from minimizing the root-mean-square error between the theoretical and experimental temperature field. The algorithm of conjugate directions is chosen as the minimization method, as the most accurate method of the first order of convergence. When designing the thermal regime of structures, it is necessary to have an idea of the initial boundary conditions of the product, as well as its thermophysical characteristics. Thus, the determination of the thermal conductivity coefficient of the material is the target task in ensuring the normal thermal regime of the product.
About the Author
N. O. Borshchev
Astrocosmic Center of the Federal State Institution of Science S.A. Lebedev Institute
Russian Federation
Russian Federation
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Review
For citations:
Borshchev N.O. PARAMETRIC IDENTIFICATION OF THE THERMAL CONDUCTIVITY COEFFICIENT UNDER HIGH-INTENSITY HEAT HEATING, TAKING INTO ACCOUNT THERMAL DECOMPOSITION. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2022;11(6):390-402. (In Russ.) https://doi.org/10.26583/vestnik.2022.19
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