Digitale Medien
s.l. ; Stafa-Zurich, Switzerland
Materials science forum
Vol. 566 (Nov. 2007), p. 71-76
ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
The effects of the friction between the projectile and launch-tube wall in a single-stage gunare examined by the interior ballistics simulations. The solid/gas two-phase flow code fortwo-dimensional axisymmetric calculation is used in the simulations. In this study, one-dimensionalquasi-steady-state elastic relations are applied to the projectile in the estimation of the friction force.The calculation method is validated by the comparison of the simulated results with the experimentaldata such as the histories of the breech pressure and the projectile acceleration. The simulated resultsreveal that the impact of the shock waves to the base increases the friction force acting on theprojectile. The large friction force in the tight fit case decelerates the projectile, consequentlyintensifying the chamber pressure. The muzzle velocity decreases with the increase of the projectilediameter, and this appears strongly in the low chamber pressure case
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.566.71.pdf
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