An experimental-computational system for materials thermal properties determination and its application for spacecraft structures testing
- Paper number
IAC-06-C2.7.09
- Author
Prof. Oleg Alifanov, Moscow Aviation Institute (MAI), Russia
- Coauthor
Mr. Aleksey V. Nenarokomov, Moscow Aviation Institute (MAI), Russia
- Coauthor
Mr. Valeriy V. Mikhaylov, Moscow Aviation Institute (MAI), Russia
- Coauthor
Mr. Dmitry M. Titov, Moscow Aviation Institute (MAI), Russia
- Coauthor
Mr. Valeriy M. Yudin, Central Aero-HydroDynamic Institute, Russia
- Coauthor
Prof. Oleg Alifanov, Moscow Aviation Institute (MAI), Russia
- Year
2006
- Abstract
An experimental-computational system is presented for investigating the thermal and radiative properties of composite materials by methods of inverse heat transfer problems and which is developed at the Thermal Laboratory of Department Space Systems Engineering, of Moscow Aviation Institute (MAI). The system is aimed at investigating the materials in conditions of unsteady contact and/or radiation heating over a wide range of temperature changes and heating rates in a vacuum, air and inert gas medium. The paper considers the hardware components of the system, including the experiment facility and the automated system of control, measurement, data acquisition and processing, as well as the aspects of methodical support of thermal tests. In the next part the conception and realization of a computer code for experimental data processing to estimate the thermal and radiative properties of thermal-insulating materials are given. The most promising direction in further development of methods for non-destructive composite materials using the procedure of inverse problems is the simultaneous determination of a combination of their thermal and radiation properties. The general method of iterative regularization is concerned with application to the estimation of materials properties (as example: thermal conductivity λ(T), heat capacity C(T) and emissivity ε(T). Such problems are of great practical importance in the study of material properties used as non-destructive surface coating in objects of space engineering, power engineering, etc. In the third part are given the results of practical implementation of hardware and software presented in previous two parts for the estimating of thermal properties of thermal-insulating materials. The main purpose of this study was: to confirm operability and effectiveness of the methods developed and hardware equipment for determining thermal properties of particular modern high porous materials. The physical and mathematical model of heat transfer processes in the experimental specimens of thermal materials are given. Mathematical formulations of the corresponding IHCP are also presented. The requirements are formulated to experimental specimens, parameters and testing conditions. Developed are a scheme of thermal tests and a test technique. Given are the results of specimens thermal tests for determining thermal properties of the light-weight thermal-insulating material in the temperature range 300-1300 K. The material is delivered for study by ESTEC/ESA.
- Abstract document
- Manuscript document
IAC-06-C2.7.09.pdf (🔒 authorized access only).
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