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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.950
pages 929-940

Explosively Generated Supercritical Water for Deploying Airbags

Akira Iwama
The Institute of Space and Astronautical Science, Ministry of Education, Culture and Science, Sagamihara, 229-8510, Japan; and Nippon Kohki Company, Nishigo-mura, Nishishirakawa-gun, Fukushima-Perfecture, 229-8510, Japan
Toshihiko Tamura
Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-7, 4259 Nagatuda, Midori-ku, Yokohama 226-8502, Japan; and Nippon Kohki Company, Nishigo-mura, Nishishirakawa-gun, Fukushima-Perfecture, 229-8510, Japan
Ding-Da Yu
Nippon Kohki Company, Nishigo-mura, Nishishirakawa-gun, Fukushima-Perfecture, 229-8510, Japan

ABSTRACT

This inflator makes use of supercritical water, which is produced with a rapid stirring operation, due to high temperature and supersonic jet emission from a starter loaded with solid propellant. The pressure-time history and gas temperature of the exhaust products are satisfactory to car passengers' requirement. No pollutant gas was contained in this gas generant system, because water, oxygen and n-hexane are confined in the main reactor, and RDX/KCIO4/HTPB propellant was used only in the starter portion of the inflator. An example of semi-empirical calculation and experimental results are included in this paper.


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