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http://dx.doi.org/10.6108/KSPE.2021.25.6.060

Impact Sensitivity and Friction Sensitivity of HTPB Based Propellant According to the Aluminum Content  

Kim, Kahee (Propulsion Center, Hanwha Corporation)
Park, Jung-Ho (Propulsion Center, Hanwha Corporation)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.25, no.6, 2021 , pp. 60-65 More about this Journal
Abstract
In this paper, we examined the ignition possibility of the propellant depending on its non-uniform composition of aluminum. Impact and friction sensitivity was investigated by arbitrarily changing the aluminum content in the range of 14~20% to simulate the non-uniform distribution of aluminum in the propellant. As a result of measuring the impact sensitivity, the 50% ignition energy and minimum ignition energy have values around 50 J regardless of the aluminum content. This means that the propellant does not become sensitive to impact even if the aluminum content is increased. On the other hand, the friction sensitivity result shows that as the aluminum content increases, the 50% ignition force and minimum ignition forces were decreased, and thus the propellant becomes sensitive. "Hot Spot" model of propellant ignition is applied, the space inside the propellant is momentarily compressed and ignited by friction stimuli rather than by impact stimuli.
Keywords
HTPB Propellant; Composite Solid Propellant; Impact Sensitivity; Friction Sensitivity; Aluminum;
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