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New testing device for air permeability
Communications in Development and Assembling of Textile Products, 2023 Air permeability is used to characterize textile fabrics with respect to their usability as a garment or filter, airbag or parachute. It depends on the fabric’s porosity, air voids in the fabric, yarn specifications, thickness and other parameters ...
Lilia Sabantina, Andrea
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Comparative analysis of air permeability between UHPC and epoxy-coated normal concrete for hyperloop tube structures [PDF]
HeliyonThis study evaluates the air permeability of epoxy-coated normal concrete and ultra-high performance concrete (UHPC) for use in Hyperloop tube structures, where maintaining ultra-low air permeability is crucial to preserving the vacuum environment. While
Dae Sang Kim +3 more
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Permeability of Magnetic Cores with Air Gaps [PDF]
Materials, 2022 The influence of the geometric dimensions of the cut core and the number and size of air gaps on the effective permeability was investigated. Using dimensional analysis, an equation was obtained that relates the permeability of the cut core to the simplest dimensionless combination of the mean magnetic flux length l, single air gap length lg1, the ...
Yuri N. Starodubtsev +3 more
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Influence of carbonation on torrent air permeability of concrete
Acta Polytechnica, 2023 Air permeability testing is increasingly being used to measure the impermeability of concrete and to estimate the durability of reinforced concrete structures using this property.
Roman Jaskulski +2 more
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Journal of Asian Architecture and Building Engineering, 2023 This study aims to investigate the impacts of compressive strength and curing conditions of concrete on pore size distribution and air permeability. An empirical correlation was developed by analyzing the results from existing studies that measured both ...
Jaeyoung Lee, Kazunori Harada
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Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric
Proceedings, 2020 The purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed elliptic ...
Yuki Kataoka +4 more
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Similarity criteria for canopy porosity and environmental impact analysis of air permeability
Journal of Industrial Textiles, 2022 The porosity is one of the important properties of canopy fabric, which affects the stability, aerodynamic performance and inflation performance of parachutes.
Siyu Zhang, Li Yu, He Jia, Xiaoshun Zhao
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Tailoring the Porosity and Breathability of Nanofiber Webs with Mesh Size of the Deposition Material
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2023 Nano and micro-pores of the electrospun webs present good moisture vapor transmission rate, while it maintains resistance to pressured air and resistance to liquid for some type of clothing.
Nida Oğlakçıoğlu, Çiğdem Akduman
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Journal of Natural Fibers, 2021 The influence of air, oxygen and argon plasma treatment on the thermal comfort behavior of cotton woven fabric which is spun from modified yarn path in ring spinning has been investigated in this study.
A. Jebastin Rajwin, C. Prakash
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Development of air tightness prediction method of masonry walls [PDF]
E3S Web of Conferences, 2020 Recently, the construction of external walls of various blocks, which are externally insulated with mineral wool thermal insulation layer, with ventilated air gap and external finishing (ventilated wall structures) is becoming popular for public and ...
Geležiūnas Valdemaras +3 more
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