Research of adequacy of mathematical model of heat-mass exchange in the furnace on fire resistance of hearing walls

Abstract

The purpose of carrying out researches of this operation is the study of adequacy of mathematical models of fire furnaces for their further use in case of study of influence of constructive characteristics of fire furnaces on their metrological indices. For achievement of objective, fire resistance tests of bearing wall were carried out at test center and data on warming up of chamber of the furnace and of fragment under test are obtained. Results. The mathematical model of the fire furnace, where the tests were carried out, was created in software environment of the computer system CFD FlowVision 2.5 by means of which computing experiment was conducted. Relying on results of computing experiment and fire tests, criteria of adequacy (Student criterion, Kokhren Q-criterion, F-ratio test) were calculated. On the basis of analysis, adequacy of the used mathematical models was investigated. Scientific novelty. Application of computational experiments for design of new furnaces and enhancements of parameters of functional ones for tests according to fire resistance of bearing walls gained further development. The practical significance consists in application of results of work for design and construction of new installations for test of bearing walls for the purpose of achievement of homogeneity of temperature field on the heated surfaces of constructions in the chamber of furnace, and as result, increase of efficiency of fire resistance tests as a basis for enhancement existing regulatory base and creation of new ones for tests of the specified constructions for fire resistance.