Science and Technology of Energetic Materials

Vol.76, No.6 (2015)

Research paper

Combustion characteristics of liquid GAP
-Combustion products and C* combustion efficiency-
Kouta Yaginuma, Koji Hayashi, and Takuo Kuwahara


We focused on Glycidyl Azide Polymer (GAP) as a next generation monopropellant that can be substituted for N2H4. GAP is one of the High Energy Materials (HEMs) and not so toxic compared with N2H4. However, it is known that GAP generates carbonaceous residues at its combustion. Combustion residues can cause low propulsion performance of a thruster. Therefore, when the combustion pressure was varied, we investigated the amount of combustion products from liquid GAP, and the influence that its combustion products give in its combustion characteristics. As a result, it was found that the amount of carbonaceous residues decreases from 30% to 20% and the C* combustion efficiency becomes raised with increasing from 60% to 90% at a combustion pressure from 0.1 MPa to 1.0 MPa.

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monopropellants, liquid GAP, combustion residues, C*combustion efficiency

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