Results 11 to 20 of about 9,609 (252)

New approach in numerical simulation of internal ballistics SRM problem [PDF]

open access: yes, 2018
In this article new approach of simulating internal ballistics flows in SRM is considered. Two different phenomena should be taken into account for appropriate numerical simulation of internal ballistics problems: grain propellant regression and flow of ...
Кирюшкин, А. Е.
core   +2 more sources

Investigations of the Influence of Ignition on the Dynamic Vivacity of Propellants [PDF]

open access: yesProblemy Mechatroniki, 2019
The paper presents an attempt to determine the dynamic vivacity functions of propellants with taking into account a parallel burning of the black powder igniter and the tested propellant. The approach is based on presented results of closed vessel tests,
Radosław TRĘBIŃSKI   +2 more
doaj   +1 more source

Research on Liquid CO2 Phase Transition Ejection Technology [PDF]

open access: yesE3S Web of Conferences, 2021
Due to the low temperature and clean gas, liquid CO2 phase transition ejection technology has outstanding advantages such as high versatility, low launch cost, and environmental friendliness, which will open up a new research field for the development of
He Danna   +4 more
doaj   +1 more source

The influence of the internal ballistic pressure on the rifled barrel stress response [PDF]

open access: yesScientific Technical Review, 2020
This paper focused on the 12.7 mm gun barrel stress response caused by the pressure of the gunpowder gases. During the firing process, the barrel is loaded by different mechanical, chemical and thermal loads.
Boukera Abaci Walid   +3 more
doaj   +1 more source

Numerical evaluation of an autofrettaged thick-walled cylinder under dynamically applied axially non-uniform internal service pressure distribution

open access: yesDefence Technology, 2018
A dynamical moving pressure structural numerical calculation model using the internal ballistics calculation pressure-time results was constituted and the vicinity of the internal ballistics and quasi-internal ballistics structural model was checked. The
Onur Güngör, Veli Çelik
doaj   +1 more source

Virtual prototyping of medieval weapons for historical reconstruction of siege scenarios starting from topography and archaeological investigations [PDF]

open access: yes, 2018
Chronicles of sieges to castles or fortresses, using “machinae”, can often be found in historical sources. Moreover, archaeological excavations of castles or fortresses has brought to light rocks or projectiles whose carving suggests a military usage ...
Annoscia, G   +3 more
core   +1 more source

Tests of Influence of Selected Gas Operated Weapon’s Action Parameters on its Ballistic and Kinematic Characteristics Part I – Examples of the Results of Theoretical Research [PDF]

open access: yesProblemy Mechatroniki, 2015
Some results of theoretical tests on influence of selected weapon’s action parameters on ballistic and kinematic characteristics of gas operated short stroke piston weapon are presented in this paper.
Józef GACEK, Grzegorz LEŚNIK
doaj   +1 more source

Comparative Analysis of Trajectory of 7.62 × 51 mm Projectiles Fired at Different Initial Velocities [PDF]

open access: yesProblemy Mechatroniki, 2022
The subject of the analysis involves the trajectories of 7.62 mm Lapua Scenar GB432 projectiles and “Ball” lead core projectiles manufactured by MESKO S.A. (Poland) fired at different initial velocities from 16, 20 and 26 inch long barrels.
Grzegorz LEŚNIK   +2 more
doaj   +1 more source

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

open access: yesEnergies, 2010
The ability to predict with some accuracy a given solid rocket motor’s performance before undertaking one or several costly experimental test firings is important.
David R. Greatrix
doaj   +1 more source

Closed Vessel Investigation of Propellant Ignition Process with Using Capillary Plasma Generator [PDF]

open access: yesProblemy Mechatroniki, 2015
Previous published results of closed vessel investigations indicated that classical primers (electric or percussion with black powder bedding) when used with LOVA propellants cause unstable burning, deflagration or even lack of ignition. Capillary Plasma
Jakub MICHALSKI, Zbigniew LECIEJEWSKI
doaj   +1 more source

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