An Approximate Model for the Theoretical Prediction of the Velocity Increase in the Intermediate Ballistics Period

• Autorzy: Trębiński R. , Czyżewska M.
• Języki publikacji: EN

Abstrakty

EN

This paper is a continuation of an earlier work [1] by the authors devoted to CFD modelling of the intermediate ballistics period. A semi-analytical model is proposed based on the analytical solution of the Prandtl-Meyer expansion for an approximate assessment of the magnitude of the velocity increase in the intermediate period. Two variants of the model provide upper and lower estimates of the velocity increase. A comparison of these estimates with the results of CFD modelling gives a similar magnitude for the velocity increase. A formula is proposed for a simple estimation of the velocity increase that can be used to calculate a correction to the muzzle velocity value obtained by internal ballistics models.

Słowa kluczowe

EN

intermediate ballistics; internal ballistics; projectile velocity

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2015
• Tom: Vol. 12, no. 1
• Strony: 77--88
• Opis fizyczny: Bibliogr. 4 poz., rys., tab.

Twórcy

autor

Trębiński R.

• Department of Mechatronics and Aviation, Military University of Technology, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

autor

Czyżewska M.

• Department of Mechatronics and Aviation, Military University of Technology, Gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

Bibliografia

• [1] Trębiński R., Czyżewska M., Estimation of the Increase in the Projectile Velocity in the Intermediate Ballistics Period, Cent. Eur. J. Energ. Mater., 2015, 12(1), 63-76.
• [2] Landau L.D., Lifshitz E.M., Fluid Mechanics, Pergamon Press, Oxford, 1963.
• [3] Carlucci D., Vega J., Empirical Relationship for Muzzle Exit Pressure in a 155 mm Gun Tube, WIT Trans. Modell. Simul., 2007, 45, 225-229.
• [4] Carlucci D., Frydman A.M., Cordes J.A., Mathematical Description of Projectile Shot Exit Dynamics (Set-Forward), J. Appl. Mech., 2013, 80, 031501-1-9.