Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method

Fumito Takeuchi, Akiko Matsuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The launch processes of a supersonic projectile in a ballistic range including separation of the sabot are numerically simulated, using moving overlapped grid method. The calculating target is a single-stage helium-gas gun, and the launch process is composed of acceleration, ventilation and sabot separation. Present numerical results correspond to experimental results both qualitatively and quantitatively regarding muzzle velocity and separation distance. The motions of the sabot and the projectile in acceleration tube can be estimated by simple one-dimensional equations. As the projectile and the sabot reach ventilation section after acceleration, high-pressure driver gas and ambient gas near the sabot are vented through small holes spread on the launch tube. After that, shock waves, which propagate at almost same velocity as the speed of the sabot, are formed forward and backward. Then, pressure difference between front surface and base surface of the sabot leads to deceleration and separation from the projectile. Furthermore, separation distance gets larger at sabot separation section. From complex flow field arisen in ventilation section and test section, the point that the sabot and the projectile separate completely should be located in sabot separation section in order to minimize the cause of flight instability.

Original languageEnglish
Title of host publication51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Publication statusPublished - 2013
Event51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013 - Grapevine, TX, United States
Duration: 2013 Jan 72013 Jan 10

Other

Other51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
CountryUnited States
CityGrapevine, TX
Period13/1/713/1/10

Fingerprint

ballistic ranges
Ballistics
Projectiles
grids
projectiles
Sabot projectiles
ventilation
Ventilation
Gases
gas
gas guns
tubes
Deceleration
deceleration
method
shock wave
gases
Shock waves
flow field
helium

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Takeuchi, F., & Matsuo, A. (2013). Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method. In 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013

Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method. / Takeuchi, Fumito; Matsuo, Akiko.

51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Takeuchi, F & Matsuo, A 2013, Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method. in 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013, Grapevine, TX, United States, 13/1/7.
Takeuchi F, Matsuo A. Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method. In 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013
Takeuchi, Fumito ; Matsuo, Akiko. / Numerical investigation of sabot separation process in a ballistic range using moving overlapped grid method. 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013.
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