Through-thickness permeability of woven fabric under increasing air pressure: theoretical framework and simulation

Xiao, Xueliang and Long, Andrew and Qian, Kun and Zeng, Xuesen and Hua, Tao (2017) Through-thickness permeability of woven fabric under increasing air pressure: theoretical framework and simulation. Textile Research Journal, 87 (13). pp. 1631-1642. ISSN 0040-5175

Abstract

Many technical applications of woven fabric are subject to increasing high pressure from air transport through the fabric. The through-thickness permeability (TP) of woven materials exhibits a dynamic response to increased air pressure. This paper presents an analytical model for predicting the steady TP of woven fabric. The approach was based on Darcy’s law and the Poiseuille equation, using the flow boundary of an idealized plain-weave unit cell. The unit cell model consists of a gradual converging-diverging (GCD) duct with a rectangular cross-section. Further, the dynamic TP of the GCD duct was established analytically as a function of increasing pressure, which correlates to the separation of air flow from the GCD duct wall. Air flow separation from the duct wall led to a quadratic relationship between the increasing pressure and air flow velocities. This dynamic TP and air flow nonlinearity were simulated numerically in the computational fluid dynamics solver CFX. Five GCD ducts under increasing air pressure were analyzed numerically and analytically. The comparison showed good agreement between the proposed analytical model and the CFD simulation, with a maximum error up to 12%. A sensitivity study showed that an increase in porosity or a decrease in the thickness of weave materials could result in a larger dynamic TP value.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 16 Jun 2017 06:06
Last Modified: 19 Dec 2017 23:31
Uncontrolled Keywords: analytical model; through-thickness permeability; woven fabric; structure properties; yarn; fabric formation
Fields of Research : 09 Engineering > 0902 Automotive Engineering > 090204 Automotive Safety Engineering
09 Engineering > 0901 Aerospace Engineering > 090102 Aerospace Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1177/0040517516657062
URI: http://eprints.usq.edu.au/id/eprint/32552

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