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A Numerical Analysis Method for Thermal Properties of Sandwich Multilayer Composites

A multi-layer composite material and numerical analysis technology, applied in the direction of design optimization/simulation, etc., can solve problems such as long cycle time, high cost of experimental methods, inaccurate result description, etc., and achieve cost and time saving and simple methods.

Active Publication Date: 2022-08-02
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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  • A Numerical Analysis Method for Thermal Properties of Sandwich Multilayer Composites
  • A Numerical Analysis Method for Thermal Properties of Sandwich Multilayer Composites
  • A Numerical Analysis Method for Thermal Properties of Sandwich Multilayer Composites

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Embodiment Construction

[0111] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

[0112] Problem Analysis and Model Assumptions

[0113] First, consider a "sandwich" type insulation model consisting of three layers of different materials, such as figure 1 shown:

[0114] For the sake of convenience, consider the problem of steady heat transfer, that is, the temperature reaches a steady state during the transfer process inside the insulating material, and ignore the heat absorption by the material itself.

[0115] Assuming that the materials in each layer are isotropic and uniformly distributed, the two-dimensional problem can be simplified as a one-dimensional problem along the material thickness direction (vertical dir...

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Abstract

The invention discloses a "sandwich" type multi-layer composite material thermal performance numerical analysis method, which is characterized by comprising the following steps: analyzing the actual physical process of the multi-layer heat transfer problem, performing analysis and reasonable assumptions with multiple models; Mathematical description and control equations of the heat transfer process of layered materials; according to the parameters, thickness, thermal conductivity and other characteristics of the interlayer material, the interface boundary conditions describing the discontinuous conditions of physical quantities on the interlayer are proposed; mathematical methods are used for the thermal conductivity model of the multi-layer thermal insulation material. Carry out discretization to obtain a discrete linear equation system; solve the discrete linear equation system, and analyze the results; the present invention can be used to conduct high-precision analysis of the heat conduction process and thermal resistance performance of sandwich steel, heat-resistant firewalls and other multi-layer composite materials. Rapid analysis method.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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