Computational methods for the determination of thermophysical properties in pulse-heating experiments
Year: 1997
Authors: Righini F., Spišiak J., Bussolino G.C., Scarpa F.
Autors Affiliation: CNR Istituto di Metrologia G Colonnetti, I-10135 Turin, Italy
Dipartimento Termoenergetica e Condizionamento Ambientale, Universitŕ di Genova, via Opera Pia 15A, 16145 Genova, ITALY
Abstract: Two alternative methods to evaluate thermophysical properties (heat capacity and hemispherical total emissivity) directly from the experimental data in pulse-heating experiments without the need to compute explicitly the heating and cooling rates are presented. The methods can be applied to a set of data originating from different experiments, providing with a single computation an estimate of the thermophysical property as a function of temperature. The first method is based on an integration of the basic equations of the pulse technique. In the second method a stochastic approach (the Kalman filter) is applied to the set of experimental data. The mathematical formulation of these computational methods is presented and the methods are intercompared by the use of a set of experimental measurements on niobium in the temperature range 1200-2600 K.
Journal/Review: HIGH TEMPERATURES-HIGH PRESSURES
Volume: 29 (4) Pages from: 473 to: 480
KeyWords: thermophysical propertiesDOI: 10.1068/htec281