TY - GEN
T1 - THERMAL CHARACTERIZATION OF ASSEMBLED PROPELLANT INCREMENTS EXPOSED TO DISCRETE THERMAL ENVIRONMENTS
AU - Blecker, Kenneth D.
AU - Hadim, Hamid
N1 - Publisher Copyright:
© 2021 Begell House Inc.. All rights reserved.
PY - 2021
Y1 - 2021
N2 - The purpose of this study is to characterize the thermal response of assembled propellant increments exposed to a variety of thermal environments and packaging conditions. The temperature distribution and bulk temperature of the propellant within the increment directly influence the burn rate and resulting pressure profile. The burn rate and pressure profile directly impact the range and stability of the munition which can result in a safety hazard if not properly accounted for. In this study first a numerical model is developed and then this numerical model is used to make a determination of whether a surface temperature measure or series of surface temperature measurements can be used to approximate or estimate the bulk propellant temperature. The numerical model accounts for variable thermal solar loading, various packaging configurations, and orientation. The results indicate that the temperature response of the assembly is influenced by both configuration and assembly. The increment notch orientation also has a significant impact on results. Orientation of the increment can also affect the maximum temperature response and care should be given to determine the heating conditions if the highest temperature exposure needs to be identified. Natural convection is relatively weak and both the small cavity size and slow temperature change drive this condition.
AB - The purpose of this study is to characterize the thermal response of assembled propellant increments exposed to a variety of thermal environments and packaging conditions. The temperature distribution and bulk temperature of the propellant within the increment directly influence the burn rate and resulting pressure profile. The burn rate and pressure profile directly impact the range and stability of the munition which can result in a safety hazard if not properly accounted for. In this study first a numerical model is developed and then this numerical model is used to make a determination of whether a surface temperature measure or series of surface temperature measurements can be used to approximate or estimate the bulk propellant temperature. The numerical model accounts for variable thermal solar loading, various packaging configurations, and orientation. The results indicate that the temperature response of the assembly is influenced by both configuration and assembly. The increment notch orientation also has a significant impact on results. Orientation of the increment can also affect the maximum temperature response and care should be given to determine the heating conditions if the highest temperature exposure needs to be identified. Natural convection is relatively weak and both the small cavity size and slow temperature change drive this condition.
KW - Multimode heat transfer
KW - Numerical heat transfer
KW - Propellant
KW - Thermal characterization
UR - http://www.scopus.com/inward/record.url?scp=85137516772&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85137516772&partnerID=8YFLogxK
U2 - 10.1615/TFEC2021.cnd.31831
DO - 10.1615/TFEC2021.cnd.31831
M3 - Conference contribution
AN - SCOPUS:85137516772
T3 - Proceedings of the Thermal and Fluids Engineering Summer Conference
SP - 345
EP - 351
BT - 5th-6th Thermal and Fluids Engineering Conference, TFEC 2021
T2 - 5th-6th Thermal and Fluids Engineering Conference, TFEC 2021
Y2 - 26 May 2021 through 28 May 2021
ER -