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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Research and Development of Heat Flux Sensor for Thermokinetic Processes

Get access (open in a dialog) DOI: 10.1615/IHTC15.inv.009764
pages 4507-4520

Abstract

In many practical situations it is impossible to measure directly heat fluxes on the surfaces of analyzed composite structures especially in the case of thermokinetic processes inside materials. The only way that can often be used to overcome these difficulties is indirect measurements. This type of measurements is usually formulated as the solution of inverse heat transfer problems. Such problems are ill-posed in mathematical sense and their main feature shows itself in the solution instabilities. That is why special regularizing methods are needed to solve them. The general method of iterative regularization is concerned with application to the estimation of materials properties. The objective of this paper is to estimate heat fluxes on the surface of advanced materials with known thermal and thermokinetic properties using the approach based on inverse methods. An experimental-computational system is presented for preliminary determining of the thermal and thermokinetic properties of composite materials used for heat flux sensors and realization of boundary 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 medium.