Contact thermal resistance test method applied to GH4169/GH4169 high temperature alloy

A technology of GH4169 and contact thermal resistance, which is applied in the field of contact thermal resistance testing of GH4169/GH4169 high-temperature alloys, can solve the problems of complex testing process, fixed testing conditions, inability to provide timely and accurate contact thermal conductivity data of material interface, and achieve simplification The test process and the effect of the simple test process

Inactive Publication Date: 2011-02-16
BEIHANG UNIV
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Problems solved by technology

[0004] Although the existing test technology can accurately obtain the contact heat conduction under the conditions of given temperature, pressure and interface roughness, due to the complexity of the test process and rel

Method used

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  • Contact thermal resistance test method applied to GH4169/GH4169 high temperature alloy
  • Contact thermal resistance test method applied to GH4169/GH4169 high temperature alloy
  • Contact thermal resistance test method applied to GH4169/GH4169 high temperature alloy

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Example Embodiment

[0120] Example

[0121] In order to verify the correctness of the determined contact thermal conductivity model, a set of confirmatory tests were carried out. The test results are shown in Table 9.

[0122] Table 9 confirmatory test data

[0123]

[0124]

[0125] (1) Use the determined empirical formula of contact thermal conductivity: h s =0.1566T 0.371 P 2.061

[0126] When temperature and pressure are applied at the same time, the data in Table 10 is calculated:

[0127] Table 10 Contact thermal conductivity data

[0128]

[0129] (2) Use the determined empirical formula of contact thermal conductivity: h s =0.5013P 2.18

[0130] When only considering the influence of pressure, the data in Table 11 is calculated:

[0131] Table 11 Contact thermal conductivity data

[0132]

[0133] Through the above examples, it can be concluded that the test method provided by the present invention can directly enter the temperature and pressure data into the formula when the temperature and pressure ...

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Abstract

The invention discloses a contact thermal resistance test method applied to a GH4169/GH4169 high temperature alloy, comprising the following steps of: modeling through the reduced elastic moduli of two contact materials according to the plastic deformation theory, simplifying a model, and finally determining unknown parameters through a stepwise regression test to obtain an optimal regression equation. The contact thermal conductance of the GH4169/GH4169 high temperature alloy is obtained according to a regression analysis result, and the reciprocal of the contact thermal conductance is fetched to obtain contact thermal resistance. Within the temperature interval of 100-600 DEG C, when a temperature value and a pressure value are selected as independent variables, hs is equal to 0.1566T0.371P2.061, and when only the pressure value is selected as the independent variable, hs is equal to 0.5013P2.18. In the invention, the practical engineering contact thermal resistance test method is obtained on the base of test data through selecting a proper theoretical model by applying a mathematical statistics method. Only by obtaining the required parameters through the test data, the invention can obtain the contact thermal resistance according to a simple formula under any condition of changing the test temperature and pressure, and thereby the contact thermal resistance test process is simple and can be repeatedly used.

Description

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Claims

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Application Information

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Owner BEIHANG UNIV
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