REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

deterMInATION of Axial plume ImpingemeNt forcE on the multitube LAUNCHing device by analogy with process of hot tandem stage rocket separation

siniša jovančić

Military Technical Institute, Belgrade, jovancicsinisa@gmail.com

Dragoslav ŽivaniĆ

Military Technical Institute, Belgrade, dragoslav@ptt.rs

Milan živanović

Military Technical Institute, Belgrade, milance58@gmail.com

Abstract: This paper presents a requirement for using the equation of plume impingement force during tandem separation of multistage rocket to the case of determining the axial force on the launching device of MLRS during launching. It also presents the calculation of axial plume impingement  force in  dependence on the position of the  tube which the missile is  launched from, and the possibility of applying  this model to study the dynamics of MLRS, as well as  to study the stress on the adjacent  tubes’ caps.

Key words: : impingement force, surface, fictitious radius, nozzle exit distance.