Navier-Stokes analysis of muzzle-blast-type waves
A Navier-Stokes solution is presented as a mathematical model to muzzle-blast-type waves. The study has two novel features. First, it is a combined internal/external analysis relating barrel flow parameters to muzzle environment parameters. Second, the dissipative and dispersive effects of viscosity on the propagation phenomenon are captured. The investigation also serves as a numerical analysis of axisymmetric, high-pressure waves in an unsteady, viscous flow. Conservation-form Navier-Stokes equations are integrated by a two-step, explicit finite-difference scheme. The shocks are captured and treated by the inclusion of artificial dissipative terms. Turbulence is accounted for by an algebraic eddy-viscosity model. The internal flow is solved by a predictor-corrector method of characteristics with the shock fitted in; its results compare very well with the experimental data available. The numerical results obtained simulate the muzzle blast waves and show the effects of viscosity. Comparison with the classical spherical blast wave theory shows the deviation in propagation patterns of the axisymmetric and spherical waves. 21 references.
- Research Organization:
- Old Dominion Univ., Norfolk, VA
- OSTI ID:
- 5321010
- Journal Information:
- AIAA J.; (United States), Journal Name: AIAA J.; (United States) Vol. 24; ISSN AIAJA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Prediction of viscous ship roll damping by unsteady Navier-Stokes techniques
Steady and unsteady internal-flow computations via the solution of the compressible Navier-Stokes equations for low Mach numbers
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMMINUTION
DIFFERENTIAL EQUATIONS
EQUATIONS
EXPLOSIVE FRACTURING
FLUID FLOW
FRACTURING
MATHEMATICAL MODELS
MATHEMATICS
NAVIER-STOKES EQUATIONS
NUMERICAL ANALYSIS
PARTIAL DIFFERENTIAL EQUATIONS
SHOCK WAVES
UNSTEADY FLOW
VISCOUS FLOW