Method of calculating the thermal resistance of a contact between metal surfaces

1976 ◽  
Vol 19 (1) ◽  
pp. 18-22 ◽  
Author(s):  
M. M. Bochorishvili ◽  
E. A. Ganin
Keyword(s):  
Thermal Resistance ◽  
Metal Surfaces

Thermal resistance of contact with oxidized metal surfaces

1973 ◽  
Vol 25 (4) ◽  
pp. 1292-1297
Author(s):  
V. M. Popov ◽  
A. I. Krasnoborod'ko
Keyword(s):  
Thermal Resistance ◽  
Metal Surfaces

Questions of thermoregulation in heatstressed composite systems with mesh screens

10.12737/1780 ◽  
2013 ◽  
Vol 3 (3) ◽  
pp. 156-160
Author(s):  
Ерин ◽  
Oleg Erin ◽  
Попов ◽  
Viktor Popov ◽  
Кондратенко ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
Metal Surfaces ◽  
Thermal Conditions ◽  
Metal Wire ◽  
Contact Thermal Resistance ◽  
Composite Systems ◽  
Intensive Development

In connection with the intensive development of new areas of technology, where heat-stressed systems are widely represented, there is urgent need of directed thermoregulation. To control the thermal conditions in composite systems it is required, in particular, to create connections with good insulation. The problem of increasing contact thermal resistance between the metal surfaces by introducing of mesh screens made of metal wire into the zone section is examined on condition the application of small loads not exceeding 1 MPa.

Contact heat exchange in conjunction with metal surfaces which have deviations in form or waviness

2015 ◽  
Vol 5 (4) ◽  
pp. 234-241
Author(s):  
Ерин ◽  
Oleg Erin ◽  
Кондратенко ◽  
Irina Kondratenko ◽  
Попов ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Resistance ◽  
Metal Surfaces ◽  
Calculated Data ◽  
Contact Thermal Resistance ◽  
Contact Heat ◽  
Mechanical Loads ◽  
Physical Experiments ◽  
Contact Heat Exchange ◽  
Constituent Elements

In the design of thermally stressed units in the sectors of mechanical engineering, aviation, aerospace, energetics it is often necessary to have information about the formation of the contact thermal resistance resulting from the discrete nature of parts metal surfaces contacting. While passing through the section zones of heat flows the temperature gradient increases, thus reducing the heat transfer capability of the contact junction and leads to thermal expansion of the constituent elements of the systems, relative shifts and warpages. The process of heat transfer through the zone of contact between metal surfaces having deviation of shapes in the form of nonflatness or waviness under conditions suitable to small mechanical loads is considered. The model of formation of the contact thermal resistance (CTR), in case of double contraction of the heat flow of channel and contact mаcrospots, caused by nonflatness or waviness, and then to microspots caused by roughness. Subject to the provisions of the theory of mechanical contacting of solids theoretical curves is derived describing the contact thermal resistance for compounds with surfaces having microdeviation or waviness operating in the regime of small mechanical loads. The results of physical experiments give satisfactory agreement with the calculated data. It was established that the presence of nonflatness or waviness on the contact surfaces increases CTR significantly as compared with rough surfaces. Increase of CTR is explained by the increase of wave height or equivalent nonflatness

scholarly journals IV. On the passage of heat between metal surfaces and liquids in contact with them

1897 ◽  
Vol 190 ◽  
pp. 67-88 ◽  
Keyword(s):  
Thermal Resistance ◽  
Metal Surfaces ◽  
Metal Plate ◽  
Hot Water ◽  
The Other ◽  
The Subject ◽  
Heated Metal ◽  
Thermal Conductivities

The determination of the rate of transmission of heat from the surface of a heated metal to water in contact with it, or from hot water to a colder surface, is a problem of some difficulty, but is of such great importance in the theory of boilers and surface condensers, that further investigation would seem to be justified, especially as, although the theory of the subject has been much studied, yet owing to practical difficulties, the constants involved, so far as the author is aware, have not been definitely determined for cases which occur in practice. Peclet’s experiments on the rate of transmission of heat from water to water across a metal plate, throw much light on the question. His experiments were made to determine the thermal conductivities of various metals by measuring the heat passed through a metal plate, one side of which was exposed to steam and the other to water which was kept agitated by a stirrer. In these experiments, Peclet found that the heat transmitted was sensibly independent of the nature and thickness of the metal used, the conclusion being that on each side of the plate there was a film of water through which the heat was transmitted by conduction, and that compared to these, the thermal resistance of the plate was small. This difficulty was overcome by an arrangement consisting of revolving brushes in contact with each side of the plate, so as to prevent the formation of a film on the surfaces, and by keeping the water in a violent state of agitation. In this way it was possible to keep the surfaces of the plate at the same temperature as the water in contact with them, and the conductivities of metals determined by this method agree with carefully determined conductivities obtained by other methods.

scholarly journals A simple test method for measurement of the interface thermal resistance of coated and uncoated metal surfaces

2020 ◽  
Vol 1599 ◽  
pp. 012049
Author(s):  
S Pedrazzi ◽  
A Vergnano ◽  
G Allesina ◽  
P Veronesi ◽  
F Leali ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
Metal Surfaces ◽  
Test Method ◽  
Simple Test ◽  
Interface Thermal Resistance

The Wear of Metal Surfaces

1876 ◽  
Vol 1 (5supp) ◽  
pp. 78-78
Author(s):  
Joshua Rose
Keyword(s):  
Metal Surfaces
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