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

2008 ◽  
Vol 35 (12) ◽  
pp. 1510-1515 ◽  
Author(s):  
A. Francesconi ◽  
D. Pavarin ◽  
A. Bettella ◽  
F. Angrilli
Keyword(s):  
Special Design ◽  
Two Stage ◽  
Gas Guns

scholarly journals Performance and Modeling of a Two-Stage Light Gas Gun Driven by Gaseous Detonation

2020 ◽  
Vol 10 (12) ◽  
pp. 4383
Author(s):  
Weiqi Tang ◽  
Qiu Wang ◽  
Bingchen Wei ◽  
Jiwei Li ◽  
Jinping Li ◽  
...  
Keyword(s):  
Tube Wall ◽  
Numerical Approach ◽  
Operating Conditions ◽  
Gaseous Detonation ◽  
Two Stage ◽  
Piston Velocity ◽  
Gas Gun ◽  
Small Influence ◽  
Improved Model ◽  
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.

scholarly journals Analysis of Energy Consumption of Crushing Processes – Comparison of One-Stage and Two-Stage Processes

2017 ◽  
Vol 39 (2) ◽  
pp. 17-24
Author(s):  
Paweł Ciężkowski ◽  
Jan Maciejewski ◽  
Sebastian Bąk
Keyword(s):  
Energy Consumption ◽  
Experimental Comparison ◽  
Special Design ◽  
Two Stage ◽  
Jaw Crusher ◽  
Average Dimension ◽  
One Stage

Abstract This paper presents experimental comparison of two machine crushing technologies: one-stage and two-stage. The study was carried on a model double-toggle jaw crusher which allows crushing forces, energy and toggle displacement to be measured. The main aim of the work was to determine the energy consumption of crushing process assuming a given level of fragmentation. Studies were performed on three rocks: granite “Strzegom”, limestone “Morawica” and sandstone “Mucharz”. The material tested had a cubic shape and average dimension of 90 mm. One-stage crushing was carried out for outlet slot er = 11 mm, and two-stage crushing for er = 24 mm and 11 mm. In the tests special design of variable profile moving jaw was used and fixed jaw was flat. The analysis of the results shows that taking into account energy consumption, it is better to use two-stage crushing process. For given materials energy consumption in the two-stage crushing process was reduced by 30%.

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

2006 ◽  
Vol 33 (1-12) ◽  
pp. 592-604 ◽  
Author(s):  
D. Pavarin ◽  
A. Francesconi ◽  
F. Niero ◽  
F. Angrilli
Keyword(s):  
Chamber Pressure ◽  
Two Stage ◽  
Gas Guns

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

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

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

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

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

2017 ◽  
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

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

1990 ◽  
Author(s):  
S.L. Milora ◽  
S.K. Combs ◽  
M.J. Gouge ◽  
R.W. Kincaid
Keyword(s):  
Two Stage ◽  
Gas Guns

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

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.

364: Two stage "Progressive Elongation of Spermatic Cord" Technique in Criptorchidism with very short Spermatic Vessels

2007 ◽  
Vol 177 (4S) ◽  
pp. 121-121
Author(s):  
Antonio Dessanti ◽  
Diego Falchetti ◽  
Marco Iannuccelli ◽  
Susanna Milianti ◽  
Gian P. Strusi ◽  
...  
Keyword(s):  
Spermatic Cord ◽  
Two Stage
Sign in / Sign up

Export Citation Format

Share Document