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

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

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v6.i2.20
pages 153-169

MODIFIED BURNING RATE SPECTRUM & COMBUSTION MECHANISM OFTETRA-OLGAP

Sumito Togo
Institute of Space & Astronautical Science/Japan Aeropace Exploration, Agency, JAPAN
Kiyokazu Kobayashi
Institute of Space & Astronautical Science/Japan Aeropace Exploration Agency (JAXA), Japan
Toru Shimada
ISAS, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
Yasushi Niimi
NOF Corporation, JAPAN
Yoshio Seike
NOF Corporation, JAPAN
Makihito Nishioka
University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
Keiichi Hori
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Chuo-Ku, Sagamihara, Kanagawa 252-5210, Japan

ABSTRAKT

Attempts were made to extend the burning rate spectrum of glycidyl azide polymer (GAP) towards both upper and lower sides. Nano-sized aluminum and carbon nanofibres (CNF) were used to enhance the burning rate of GAP, and polyethylene glycol (PEG) was used to lower the burning rate. PEG addition is very effective and burning rate is lowered below 4mm/s even at 10MPa. Mechanical properties were also evaluated and shown to be good enough for practical use. Static firing tests of GAP as a gas generator for hybrid rockets were successfully performed in small size rocket motors, and the detail of them are presented and discussed. Combustion mechanism of cured tetra-ol GAP based upon the Beckstead model was developed using the results of fine thermocouple temperature measurement. Some modifications are made to adjust experimental results.