Method for measuring thermophysical property of columnar thermal insulation material
A technology of thermal insulation materials and thermophysical properties, applied in the field of thermal physical property measurement of materials, can solve the problems of unsuitable fiber material thermal conductivity measurement, increased experimental complexity and errors, etc.
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[0033] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the invention in unnecessary detail.
[0034] In the specific implementation, it is assumed that within the measured temperature range, the anisotropy of the columnar orthotropic thermal insulation material, its axial thermal conductivity, radial thermal conductivity and volumetric heat capacity are unknown parameters to be estimated, Other size parameters and physical parameters are constant. Under the established cylindrical coordinates, height Z=0.05m, radius R 2 In the two-dimensional heat transfer model of columnar orthotropic thermal insulation material = 0.05m, the governing equation and boundary conditions are shown in Equation 4 and Equation 5, respectively:
[0035] ρ c p ...
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