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Experimental Analysis of Aspirating Airbag Units
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1999 by SAE International in United States
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Aspirating airbag modules are unique from other designs in that the gas entering the airbag is a mixture of inflator-delivered gas and ambient-temperature air entrained from the atmosphere surrounding the module. Today's sophisticated computer simulations of an airbag deployment typically require as input the mass-flow rate, chemical composition and thermal history of the gas exiting the canister and entering the airbag. While the mass-flow rate and temperature of the inflator-delivered gas can be obtained from a standard tank test, information on air entrainment into an aspirated canister is limited. The purpose of this study is to provide quantitative information about the aspirated mass-flow rate during airbag deployment. Pressure and velocity measurements are combined with high-speed photography in order to gain further insight into the relationship between the canister pressure, the rate of cabin-air entrainment and the airbag deployment. Fully instrumented, production level aspirating airbag modules serve as the principal test device.
CitationGreen, P., Yu, C., Butler, P., Chen, L. et al., "Experimental Analysis of Aspirating Airbag Units," SAE Technical Paper 1999-01-0436, 1999, https://doi.org/10.4271/1999-01-0436.
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