HEAT FLOW SENSOR WITH TRANSVERSE TEMPERATURE GRADIENT Russian patent published in 2025 - IPC G01K17/20 

FIELD: measuring.

SUBSTANCE: invention relates to thermophysical measurements and can be used for measuring heat flux on surface of various objects, in particular, when measuring non-stationary heat flows under conditions of aerodynamic loads during both ground and flight thermal and thermal strength tests of structural elements of high-speed aircraft and space equipment, as well as for controlling heat flows during tests. Disclosed is a transverse temperature gradient heat flux sensor, comprising a device for attachment to a test object, device for electrodes removal, differential thermocouple in form of housing from first highly heat-conducting thermocouple metal, receiving end of which is provided with a cylindrical cavity connected by an axial channel containing a coaxial electrically insulating bushing with the other cavity arranged on the other end of the housing. In the cylindrical cavity of the receiving end there is a heat detecting element made from a second thermocouple metal, two electrodes made from a first metal, one of which is welded to the centre of the heat detecting element and the other to the housing of the heat flux sensor. Housing of the heat flux sensor is electrically connected to the heat detecting element by welding or soldering, the heat detecting element is in form of a circular membrane with concentric corrugations.

EFFECT: high sensitivity and reliability of the heat flux sensor without increasing its weight and size parameters.

2 cl, 6 dwg