IDENTIFICATION OF THE CHARACTERISTICS OF THERMAL ENGINEERING MATERIALS UNDER CONDITIONS OF NONSTATIONARY HEATING AT VARIABLE PRESSURE BY SOLVING INVERSE HEAT TRANSFER PROBLEMS. 2. EXPERIMENTAL STUDIES

Characteristic of the space technology for ever were structures operating under conditions of intense, often ex-
treme, thermal effects since the general trend in the development of technology is associated with an increase in
the number of critical heat loaded technical objects with tightening the conditions of their thermal loading with a
simultaneous increase in reliability and service life, and a decrease in specific consumption of materials. For space
vehicles, moving in the atmosphere of planets, ensuring thermal conditions is one of the most important design and
development issues. Highly porous thermal insulation materials with low thermal conductivity are widely used in
the thermal protection structures of modern space technology objects. These materials, as a rule, have an open-
pore structure. This leads to the fact that the thermophysical properties of these materials depend significantly on
the gas pressure of the environment in which the heat protective structures based on them operate. It can also be
noted that as the ambient pressure increases, a more intensive increase in the thermal conductivity coefficient is ob-
served. The overall goal of this work is to develop a set of experimental and mathematical tools for a system of iden-
tification of the properties of highly porous materials operating under conditions of not only changes in thermal
loads, but also of a variable pressure. This part of the work is devoted to the experimental study of such materials

Author:  O. M. Alifanov, S. A. Budnik, A. V. Nenarokomov, D. M. Titov
Keywords:  highly porous materials, inverse heat transfer problems, iterative regularization method, thermal vacuum tests, temperature measurements, variable pressure
Page:  1329