A Method to Estimate Fabric Particle Penetration Performance
Technical information memo. Mar 2004-Mar 2014
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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A methodology was developed to predict fabric particle penetration performance for various wind speeds. Pressure drop across a fabric sleeve in a wind tunnel was measured along with the relationship of fabric pressure drop and fabric face velocity for a bench top swatch testing apparatus. The relationship between fabric face velocity and ambient wind speed was then inferred. Fabric penetration tests were conducted on four different configurationsmaterials using a wind tunnel component sleeve, a wind tunnel swatch one material only, and a bench top swatch apparatus. Two challenges were utilized DiOctyl Sebacate and Aerosol 380. The results were found to be consistent and repeatable. The methodology was successfully demonstrated using a wind tunnel swatch testing apparatus and comparison to bench top swatch results. Using this technique, tests are possible to compare, in an equivalent manner, material, fasteners, closures, and seam particle penetration performance subjected to an equivalent wind speed. Component sleeve particle penetration performance was compared to bench top swatch results and generally found to be within 0.2 20 for the DiOctyl Sebacate challenge. Aerosil challenge was found to generally differ by less than 0.1 10 between component sleeve wind tunnel tests and bench top swatch tests. While the methodology shows promise, further research of the particle dynamics in the vicinity of the sleeve and within the fabriccomponent gap may be needed to improve the correlation between wind tunnel component sleeve tests and bench top swatch test. The ability to predict multi-layered fabric performance from the constituent material performance was demonstrated and this technique may be useful in the design of tailored IPE systems.
- Chemical, Biological and Radiological Warfare
- Protective Equipment