Voronezh, Russian Federation
Voronezh, Russian Federation
Voronezh, Voronezh, Russian Federation
UDC 621
The article presents the results of an experimental study of the contact thermal resistance (CTR) in detachable joints made of different metals (D16T alloy-steel 30) with fillers of various nature and geometry. The experiments were performed in the range of contact pressures of 0.1-2.5 MPa and temperatures of 338-473 K. As fillers, asbestos sheet and carbon steel, stainless steel, and brass mesh were used. It has been established that the use of fine-mesh stainless steel grids increases the thermal resistance by a factor of 10.4 compared to direct contact. The influence of oxide films and the geometric parameters of the grid on the thermal resistance has been identified. A dimensionless complex has been proposed for the comparative evaluation of the effectiveness of fillers. The obtained data can be used in the design of heat-loaded components of energy equipment.
contact thermal resistance, dissimilar metals, mesh filler, heat transfer, thermal power engineering, thermal control
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