HEAT FLUX SENSOR Russian patent published in 2019 - IPC G01K17/06 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement of heat flows and can be used for long-term measurement of local heat flows with high power and wide dynamic range, which affect structural elements during gas-dynamic tests. Disclosed is a heat flow sensor comprising a heat-capturing element with two thermocouples, to which a bushing is welded, which is welded to a steel housing, inside which a steel tube is installed on the threaded connection, with one end directed towards the inner side of the heat-absorbing element, and the other side is welded to the first end of the metal supply pipe cooling channel, which is pressed by the second end into the housing and has a hole, connected to continuation of cooling supply channel in housing and installed on thread in cooling channel of housing by first coolant feed nozzle, for discharge of which the second union is installed, which is installed on thread in discharge channel of cooling in housing. Thermocouples are connected through sealed leads installed in adapter sleeve to electric conductors passing further in housing and connected to output electrical connector. Heat-absorbing element is made in form of thin-wall heat-resistant cap with installed inside it ceramic insert from material with orthogonally anisotropic heat conductivity, wherein thermal conductivity coefficient along transducer longitudinal axis is substantially smaller than heat conductivity coefficient in transverse direction to it, and thermocouples are made in heat-resistant design.

EFFECT: providing higher dynamic range characteristics (up to 20 MW/m) and reducing sensor error to 3 % when measuring high-power local heat flux for a long period of time during gas-dynamic testing of various structures.

1 cl, 1 dwg