Effect of in-bore gas on railgun performance

Conference · Tue Jan 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5522001

Rolader, G E ^[1]; Batteh, J H ^[2]

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1. Science Applications International Corp., Shalimar, FL (US)
2. Science Applications International Corp., Marietta, GA (US)

Acceleration of a projectile in a non-evacuated railgun bore produces a series of shock waves traveling through the gas in front of the projectile which retards the projectile's motion. In this paper, a model is presented which describes the three components of this retarding force - the force required to accelerate the gas to the projectile velocity as it is entrained by the shock front, the force required to continue to accelerate previously shocked gas as the projectile accelerates, and the force required to overcome the viscous drag which arises from the interaction of the shocked gas and the gun tube. We address the relative contributions of the three components of the force and the significance of the retarding force when compared to the net accelerating force.

• OSTI ID: 5522001
• Report Number(s): CONF-9004136-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:1; Conference: 5. IEEE symposium on electromagnetic launcher technology, Destin, FL (United States), 1-5 Apr 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

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