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Sandwich type multilayer composite material thermal performance numerical analysis method

A multi-layer composite material and numerical analysis technology, applied in the direction of design optimization/simulation, etc., can solve the problems of inaccurate result description, large calculation volume and long cycle of calculation and analysis methods

Active Publication Date: 2020-01-24
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

Due to the complexity of heat transfer of multi-layer insulation materials, there are mainly experimental methods and calculation analysis methods for the research on their heat transfer characteristics at low temperatures. However, the experimental methods are costly and long-term; Large, the result description is not accurate enough

Method used

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  • Sandwich type multilayer composite material thermal performance numerical analysis method
  • Sandwich type multilayer composite material thermal performance numerical analysis method
  • Sandwich type multilayer composite material thermal performance numerical analysis method

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Embodiment Construction

[0112] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0113] Problem analysis and model assumptions

[0114] First, consider a "sandwich" type insulation material model consisting of three layers of different materials, such as figure 1 Shown:

[0115] For convenience, the steady heat transfer problem is considered, that is, the temperature reaches a steady state during the transfer process inside the insulation material, and the heat absorption of the material itself is ignored.

[0116] Assuming that the materials in each layer are isotropic and evenly distributed, the two-dimensional problem can be simplified into a one-dimensional problem along the material thickness direction (vertical direction), as shown in fi...

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Abstract

The invention discloses a sandwich type multi-layer composite material thermal performance numerical analysis method. The method is characterized by comprising the following steps: analyzing the actual physical process of a multi-layer heat transfer problem, and performing analysis and reasonable assumption by multiple models; giving a mathematical description and control equation for describing the heat transfer process of the multilayer material; proposing an interface boundary condition for describing a physical quantity discontinuity condition on the interlayer according to the characteristics of parameters, thickness, heat conduction coefficient and the like of the interlayer material; discretizing the multi-layer thermal insulation material heat conduction model by adopting a mathematical method to obtain a discrete linear equation set; solving the discrete linear equation set, and analyzing a result. The method can be used for carrying out high-precision rapid analysis on the heat conduction process and the thermal resistance performance of multi-layer composite materials such as sandwich steel and heat-resistant firewalls.

Description

technical field [0001] The invention relates to the application field of composite heat-resistant materials, in particular to a numerical analysis method for thermal performance of "sandwich" type multilayer composite materials. Background technique [0002] Since the world energy crisis in the 1970s, the demand for energy conservation has promoted the development of thermal insulation technology, which has received unprecedented attention. Multi-layer heat insulation materials have the advantages of good heat insulation effect, small mass and low pollution, and have been widely used in aerospace, aviation, chemical industry, refrigeration, air separation and other fields! Therefore, the heat insulation performance of multi-layer heat insulation materials is studied , which has positive engineering application value for aircraft thermal design. Some advanced scientific research, such as large hadron collider, space cryogenic technology, superconducting nuclear magnetic reso...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23
Inventor 袁冬芳曹富军翟丽丽何莉敏石琳郭勇
Owner INNER MONGOLIA UNIV OF SCI & TECH
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