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Hristov, Nebojša, 1978-
Uticaj promene gasodinamičkih karakteristika barutnih gasova na intenzitet natpritiska primenom specijalnih gasnih uređaja oružja
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
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Academic metadata
Doktorska disertacija
Tehničko-tehnološke nauke
Univerzitet u Kragujevcu
Fakultet inženjerskih nauka
Other Theses Metadata
[N. Hristov]
229 listova
Prilozi.
Datum odbrane: 29.01.2016.
Savić, Slobodan, 1966- (mentor)
Filipović, Nenad, 1970- (član komisije)
Tančić, Ljubiša, 1955- (član komisije)
Ilić, Slobodan. (član komisije)
Kari, Aleksandar. (član komisije)
This doctoral dissertation presents the theoretical models of the shock wave
overpressure powder gases propagation around the weapon barrel. Analytical and
numerical mathematical models have been defined. These models describe the physical
phenomena of wave propagation based on acoustic and gas dynamic principles. Based on
the mathematical models, electro-acoustic analogy and CFD techniques, the appropriate
computational models for simulation of the shock wave propagation and monitoring of
the overpressure value in the field around the firearm barrel with and without special gas
devices have been created. The changes of the primary gas dynamic parameters in the
defined spatial points in relation to the wave source or the last section of the gun barrel
have been determined by the simulation models.
Experimental tests were performed on a real model by registering the shock wave
overpressure changes in the defined spatial points. In addition to the primary parameter
monitoring, the impact of silencer to change of the projectile initial velocity was
measured.
The comparative analysis of the calculations and experimental results has provided the
qualitative assessment of simulation models. In addition, possible applications of the
simulation models in design of new weapon gas devices have been defined, with remarks
on additional checks and possible modifications.
The research performed in this paper has yielded an optimized mathematical model
and optimized numerical techniques based on the unsteady RANS multiphase model for
simulation of the main shock wave gunpowder gas parameters during the firing process.
The numerical simulation model has been used to visualize the process and thus illustrate
the real physical process of the shock wave propagation.
This doctoral dissertation presents the theoretical models of the shock wave
overpressure powder gases propagation around the weapon barrel. Analytical and
numerical mathematical models have been defined. These models describe the physical
phenomena of wave propagation based on acoustic and gas dynamic principles. Based on
the mathematical models, electro-acoustic analogy and CFD techniques, the appropriate
computational models for simulation of the shock wave propagation and monitoring of
the overpressure value in the field around the firearm barrel with and without special gas
devices have been created. The changes of the primary gas dynamic parameters in the
defined spatial points in relation to the wave source or the last section of the gun barrel
have been determined by the simulation models.
Experimental tests were performed on a real model by registering the shock wave
overpressure changes in the defined spatial points. In addition to the primary parameter
monitoring, the impact of silencer to change of the projectile initial velocity was
measured.
The comparative analysis of the calculations and experimental results has provided the
qualitative assessment of simulation models. In addition, possible applications of the
simulation models in design of new weapon gas devices have been defined, with remarks
on additional checks and possible modifications.
The research performed in this paper has yielded an optimized mathematical model
and optimized numerical techniques based on the unsteady RANS multiphase model for
simulation of the main shock wave gunpowder gas parameters during the firing process.
The numerical simulation model has been used to visualize the process and thus illustrate
the real physical process of the shock wave propagation.
https://phaidrakg.kg.ac.rs/detail_object/o:591?tab=0#mda
