Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. The Effect of Nonlinearity on Determined Parameters of Gun Propellant Burn Rate Models
The Ballistic Compensation Effect
 Propellants, explosives, pyrotechnics 43 (2018), No.6, pp.538542 ISSN: 03407462 ISSN: 07213115 ISSN: 15214087 

 English 
 Journal Article 
 Fraunhofer ICT () 
Abstract
The pressure dependent linear burning velocity of gun propellants is described by burn rate models, e. g. Vieille's law with prefactor β and pressure exponent α. To determine the burn rate parameters closed vessel experiments are conducted, the resulting p(t) curves are analysed and α and β are determined by a curve fitting procedure. It is shown that due to the nonlinearity of the pressure dependence in Vieille's law the objective function exhibits a topography which leads to an almost linear correlation between determined burn rate parameters α and β. This is mathematically equivalent to the so called kinetic compensation effect known from thermal analysis. Therefore this linear correlation is called the ballistic compensation effect by the author. If this effect is taken into account different burn rate measurements that are seemingly non compatible can be unified.