Numerical Evaluation of a Light-Gas Gun Facility for Impact Test

Rahner, C.P.; Al-Qureshi, H. A.; Stainer, D.; Hotza, Dachamir; Fredel, Márcio C.

doi:10.1155/2014/501434

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…To ensure safe operations, understanding the properties of materials subjected to impact conditions is critical in various aerospace applications. To address this issue, specific tools are necessary to assess the impact damage on structures and systems [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Single-Stage Light-Gas Gun Facility in Malta: Business Analysis and Preliminary Design

Barilaro

Olivieri

Tiscio

et al. 2022

Aerotec. Missili Spaz.

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Impact testing is a critical activity for many aerospace activities. Data on impacts can be employed to evaluate materials survivability, operations safety, and, if possible, to plan prompt maintenance. A classical impact testing facility usually employs Light-Gas Guns (LGGs) to evaluate the effect of collisions in a controlled laboratory environment. In particular, single stage LGGs are relatively simple in their working principle, as they consist in a pressurized gas reservoir and a barrel with a projectile placed in front of the experiment target. When the shot command is executed, the gas from the reservoir accelerates the projectile through the barrel; in first approximation, its velocity is related to the reservoir pressure, the barrel geometry, and the projectile velocity. In this context, The Malta College of Arts, Science and Technology (MCAST) and the Centre of Studies and Activities for Space CISAS “Giuseppe Colombo” of the University of Padova have started a collaboration to develop a single stage LGG impact facility in Malta. In this paper, the conceptual evaluation and the development of the facility is introduced. First, the potential application of such facility in the framework of Malta aviation market as well as the business opportunities in the emerging space sector are presented. In a second part of this work, the LGG main design drivers are defined and a preliminary evaluation of the achievable projectile velocities is performed.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a Single-Stage Light-Gas Gun Facility in Malta: Business Analysis and Preliminary Design

Barilaro

Olivieri

Tiscio

et al. 2022

Aerotec. Missili Spaz.

View full text Add to dashboard Cite

show abstract

“…The results showed that the projectile muzzle velocity was lower with the real gas model compared with velocities calculated using the ideal gas model, and the error between the two models gradually increased as the distance travelled by the projectile inside the launch tube increased. Furthermore, Rahner et al (2014) conducted a numerical evaluation of the gas gun using Seigel's proposed model, to determine the most efficient gas gun for different purposes. Their paper focused on the limits and tradeoffs to be considered when designing the gas gun.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of single stage diaphragmless vertical gas gun for nitrogen and helium gas propellants

Gardiner

Egawa

Watanabe

2016

Mechanical Engineering Journal

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“…The results showed that the projectile muzzle velocity was lower with the real gas model compared with velocities calculated using the ideal gas model, and the error between the two models gradually increased as the distance travelled by the projectile inside the launch tube increased. Furthermore, Rahner et al conducted a numerical evaluation of the gas gun using Seigel's proposed model, to determine the most efficient gas gun for different purposes [3]. Their paper focused on the limits and tradeoffs to be considered when designing the gas gun.…”

Section: Introductionmentioning

confidence: 99%

Velocity Control of Diaphragmless Vertical Gas Gun for Low Pressure Ranges

Yano

Gardiner

Egawa

et al. 2016

KEM

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In the field of impact engineering, high-speed impact phenomena are simulated using a projectile accelerator. At the Impact Engineering Laboratory in Ritsumeikan University, a single-stage gas gun was designed to investigate the high-speed penetration phenomena of impacts in sand, which is known to show fluid-like behavior. The gas gun consists of a 2 m launch tube that can achieve projectile muzzle velocities of up to around 500 m/s. The theoretical muzzle velocity of the projectile can be calculated by considering the speed of sound and the specific heat ratio of propellant gases. A performance evaluation for high-pressure ranges of 1 MPa and higher in a high-pressure vessel has been conducted. When fitting parameters are introduced to the theoretical formula, good agreement is obtained with the experimental results. In this study, experiments for low pressure ranges were conducted to predict the projectile velocity and to investigate the minimum velocity limit of the projectile. By introducing fitting parameters to the theoretical formula, the projectile velocity could be predicted accurately for pressure ranges less than 1 MPa. Furthermore, the minimum velocity limit of this equipment was found to be around 30 m/s.

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Numerical Evaluation of a Light-Gas Gun Facility for Impact Test

Cited by 5 publications

References 18 publications

Evaluation of a Single-Stage Light-Gas Gun Facility in Malta: Business Analysis and Preliminary Design

Evaluation of a Single-Stage Light-Gas Gun Facility in Malta: Business Analysis and Preliminary Design

Performance evaluation of single stage diaphragmless vertical gas gun for nitrogen and helium gas propellants

Velocity Control of Diaphragmless Vertical Gas Gun for Low Pressure Ranges

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