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A gas permeability analysis method, system and gas permeability testing device

An analysis method and air permeability technology, which are applied in the field of air permeability analysis methods and air permeability test devices, and can solve problems such as inapplicability

Active Publication Date: 2019-01-01
BEIJING AEROSPACE TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application proposes a gas permeability analysis method, system and gas permeability testing device to solve the problem that the traditional porous material permeability test method is not suitable for micro-nano scale porous materials such as fiber reinforced airgel materials

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  • A gas permeability analysis method, system and gas permeability testing device
  • A gas permeability analysis method, system and gas permeability testing device
  • A gas permeability analysis method, system and gas permeability testing device

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Embodiment Construction

[0044] In order to make the technical solutions and advantages of the present application clearer, the exemplary embodiments of the present application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all implementations. Exhaustive list of examples. And if there is no conflict, the embodiments in this description and the features in the embodiments can be combined with each other.

[0045] The core idea of ​​this scheme is to place the specimen to be analyzed in a test device for multiple tests, and use the collected test data to construct the relationship between pressure and equivalent permeability based on the micro-nano-scale porous material flow equation proposed by Karniadakis and Beskok Model, according to the correlation model to calculate the permeability corresponding to a certain pressure point or a certain pressure rang...

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Abstract

The present application provides a gas permeability analysis method. The steps of the method include: obtaining the gas permeability test data of the test piece to be analyzed; based on the gas permeability test data, constructing a correlation model between pressure and equivalent permeability; according to the Correlation model to calculate the permeability corresponding to a certain pressure point or a certain pressure range. The technical solution described in this application can analyze the gas permeability of micro-nano-scale porous materials, and use this as a basis to more accurately evaluate the internal pressure distribution of micro-nano-scale porous materials under rapid heating.

Description

Technical field [0001] This application relates to the field of aircraft performance analysis, and in particular to an air permeability analysis method and air permeability testing device. Background technique [0002] The hypersonic aircraft is faced with a severe aerodynamic thermal environment during flight, and thermal protection is required to ensure that the main load-bearing structure and cabin equipment work at an appropriate temperature. [0003] Fiber-reinforced aerogel materials have been widely used in high-speed aircraft due to their excellent thermal insulation properties and suitable mechanical properties. However, due to the porous structure of the material, the porosity can reach more than 80%, and it tends to have strong adsorption, such as moisture in the air. This may cause the material to vaporize rapidly under the condition of rapid heating, and the internal pressure will rise sharply, which will lead to Damage to the structural body or its surface coating or...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 张帆马寅魏汤龙生宋月娥曹杰陈晓娜王洋
Owner BEIJING AEROSPACE TECH INST