Numerical Modelling of the Evolution the Boundary Cavity When Starting a Torpedo

This paper presents the results of mathematical modeling and numerical solution of the evolution of the cavity at the border rocket launch. Relevance of a detailed mathematical modeling of the evolution of cavity boundary is due to the fact that there is a need to identify significant largest unsteady forces and moments acting on the torpedo. The evolution of the gas cavity, which is analyzed in this paper, is associated with the processes of emergence, changes in the shape and volume of the cavity at the end of the annular gas jet into a liquid when starting a torpedo from the media. In this case, the essential features are made by geometry of the carrier and its motion in water, the shape of the annular gap and the mass flow of gas flowing out of the annular gap. As a result of numerical calculations good agreement with experimental data is obtained.

Keywords

mathematical modelling, numerical solution, cavity, gas, liquid.

References

1. Patankar S.V. Numerical Heat Transfer and Fluid Flow. New York, Hemisphere Publishing Corporation, 1980. 197 p.
2. Roache P.J. Computational Fluid Dynamics. Albuquerque, Hermosa Publs., 1976. 446 p.
3. Menter F.R. Zonal Two Equation k-w Turbulemce Models for Aerodynamic Flow. AAIA Paper 93-2906.
4. Menter F.R. Two-Equation Eddy-Viscosity Turbulence Model for Engineering Applications. AIAA Journal, 1994, vol. 32, no. 8, pp. 1598-1605.