QUICKGUN: An algorithm for estimating the performance of two-stage light gas guns

A two-stage light gas gun driven by gaseous detonation was newly constructed, which can make up for the disadvantages of the insufficient driving capability of high-pressure gas and the constraints of gunpowder. The performance of the gas gun was investigated through experiments and a quasi-one-dimensional modeling of it was also developed and described in detail. The model accounts for the friction and heat transfer to the tube wall for gases by adding a source term. An improved model has been established to consider the inertial loads in the piston or projectile and model the friction force with the tube wall. Besides, the effects of pump tube pressure on the performance of the gas gun are also investigated numerically. Simulations of the pressure histories in the pump tube and the piston and projectile velocities were conducted. A good agreement was observed between the computational predictions and experimental results. The results showed that the friction between the piston and wall had only small influence on the piston velocity. The proposed numerical approach is suitable for the development of two-stage light gas guns and tests of the operating conditions.

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Active piston technique to optimize the chamber pressure in two-stage light-gas guns

International Journal of Impact Engineering ◽

10.1016/j.ijimpeng.2006.09.053 ◽

2006 ◽

Vol 33 (1-12) ◽

pp. 592-604 ◽

Cited By ~ 1

Author(s):

D. Pavarin ◽

A. Francesconi ◽

F. Niero ◽

F. Angrilli

Keyword(s):

Chamber Pressure ◽

Two Stage ◽

Gas Guns

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618 Measurement of Delay Time from Propellant Ignition to Projectile Launch in Two-Stage Light Gas Guns for Counter Impact

The Proceedings of Conference of Kyushu Branch ◽

10.1299/jsmekyushu.2005.58.237 ◽

2005 ◽

Vol 2005.58 (0) ◽

pp. 237-238

Author(s):

Yasuhiro AKAHOSHI ◽

Junichi KITAGAWA ◽

Takao KOURA ◽

Eiji MATSUDA ◽

Masayoshi TADAOKA ◽

...

Keyword(s):

Delay Time ◽

Two Stage ◽

Gas Guns

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A special design condition to increase the performance of two-stage light-gas guns

International Journal of Impact Engineering ◽

10.1016/j.ijimpeng.2008.07.035 ◽

2008 ◽

Vol 35 (12) ◽

pp. 1510-1515 ◽

Cited By ~ 5

Author(s):

A. Francesconi ◽

D. Pavarin ◽

A. Bettella ◽

F. Angrilli

Keyword(s):

Special Design ◽

Two Stage ◽

Gas Guns

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A gas-loading system for LANL two-stage gas guns

10.2172/1213503 ◽

2015 ◽

Author(s):

Lloyd Lee Gibson ◽

Brian Douglas Bartram ◽

Dana Mcgraw Dattelbaum ◽

John Michael Lang ◽

John Scott Morris

Keyword(s):

Two Stage ◽

Loading System ◽

Gas Guns

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A gas-loading system for LANL two-stage gas guns

10.1063/1.4971622 ◽

2017 ◽

Cited By ~ 1

Author(s):

L. L. Gibson ◽

B. D. Bartram ◽

D. M. Dattelbaum ◽

J. M. Lang ◽

J. S. Morris

Keyword(s):

Two Stage ◽

Loading System ◽

Gas Guns

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Improving the performance of two-stage gas guns by adding a diaphragm in the pump tube

International Journal of Impact Engineering ◽

10.1016/0734-743x(95)99837-h ◽

1995 ◽

Vol 17 (1-3) ◽

pp. 81-92 ◽

Cited By ~ 13

Author(s):

D.W. Bogdanoff ◽

Robert J. Miller

Keyword(s):

Two Stage ◽

Gas Guns

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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