METHOD OF DETERMINING THERMAL CONDUCTIVITY OF SOLID BODY BY ACTIVE METHOD OF HEAT NON-DESTRUCTIVE TESTING

摘要

FIELD: heating.SUBSTANCE: essence of the claimed method consists in formation of the desired thermal condition of a solid body by non-contact one-way non-destructive heat impact on the surface of the latter by means of a source of infrared radiation in the laboratory and experimental conditions. The onset moment of steady-state thermal condition of the solid body is set by the analytical method. Upon reaching the steady-state thermal condition the temperature fields of surfaces of the solid body are simultaneously recorded with a non-contact temperature measuring instrument and a mirror reflector which field of vision comprises the rear surface of the solid body. The heat flow density in the direction towards the front surface of the solid body from a source of infrared radiation is fixed with a heat gauge mounted on the front surface of the solid body under study. Experimental estimated determination of the coefficient of thermal conductivity of a solid body is carried out in the zone of steady-state thermal condition according to the equation of thermal conductivity for a flat plate.EFFECT: improving accuracy of measurement of thermal conductivity coefficient.3 dwg