### Abstract

The effects of the friction between the projectile and launch-tube wall in a single-stage gun are examined by the interior ballistics simulations. The solid/gas two-phase flow code for two-dimensional axisymmetric calculation is used in the simulations. In this study, one-dimensional quasi-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 experimental data such as the histories of the breech pressure and the projectile acceleration. The simulated results reveal that the impact of the shock waves to the base increases the friction force acting on the projectile. The large friction force in the tight fit case decelerates the projectile, consequently intensifying the chamber pressure. The muzzle velocity decreases with the increase of the projectile diameter, and this appears strongly in the low chamber pressure case.

Original language | English |
---|---|

Pages (from-to) | 71-76 |

Number of pages | 6 |

Journal | Materials Science Forum |

Volume | 566 |

Publication status | Published - 2008 |

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### Keywords

- Interior ballistics
- Solid propellant
- Two-phase flow

### ASJC Scopus subject areas

- Materials Science(all)

### Cite this

**Numerical analysis of projectile-launch tube wall friction effects on projectile acceleration in single-stage gun.** / Miura, Hiroaki; Matsuo, Akiko.

Research output: Contribution to journal › Article

*Materials Science Forum*, vol. 566, pp. 71-76.

}

TY - JOUR

T1 - Numerical analysis of projectile-launch tube wall friction effects on projectile acceleration in single-stage gun

AU - Miura, Hiroaki

AU - Matsuo, Akiko

PY - 2008

Y1 - 2008

N2 - The effects of the friction between the projectile and launch-tube wall in a single-stage gun are examined by the interior ballistics simulations. The solid/gas two-phase flow code for two-dimensional axisymmetric calculation is used in the simulations. In this study, one-dimensional quasi-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 experimental data such as the histories of the breech pressure and the projectile acceleration. The simulated results reveal that the impact of the shock waves to the base increases the friction force acting on the projectile. The large friction force in the tight fit case decelerates the projectile, consequently intensifying the chamber pressure. The muzzle velocity decreases with the increase of the projectile diameter, and this appears strongly in the low chamber pressure case.

AB - The effects of the friction between the projectile and launch-tube wall in a single-stage gun are examined by the interior ballistics simulations. The solid/gas two-phase flow code for two-dimensional axisymmetric calculation is used in the simulations. In this study, one-dimensional quasi-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 experimental data such as the histories of the breech pressure and the projectile acceleration. The simulated results reveal that the impact of the shock waves to the base increases the friction force acting on the projectile. The large friction force in the tight fit case decelerates the projectile, consequently intensifying the chamber pressure. The muzzle velocity decreases with the increase of the projectile diameter, and this appears strongly in the low chamber pressure case.

KW - Interior ballistics

KW - Solid propellant

KW - Two-phase flow

UR - http://www.scopus.com/inward/record.url?scp=38349129431&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38349129431&partnerID=8YFLogxK

M3 - Article

VL - 566

SP - 71

EP - 76

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

ER -