Numerical Modeling of Unsteady Gas Flow Around the Projectile in the Light Gas Gun

Authors

Valery Ponyavin, University of Nevada, Las VegasFollow
Yitung Chen, University of Nevada, Las VegasFollow
Darrell Pepper, University of Nevada, Las VegasFollow
Hsuan-Tsung Hsieh, University of Nevada, Las VegasFollow

Document Type

Conference Proceeding

Publication Date

2004

Publication Title

2004 ASME International Mechanical Engineering Congress and Exposition

Publisher

American Society of Mechanical Engineers

First page number:

495

Last page number:

501

Abstract

In this study, an attempt to calculate the characteristics of gas flow around a projectile during the motion of the projectile in the Joint Actinide Shock Physics Experimental Research (JASPER) light-gas gun is undertaken. The flow is considered as axisymmetric, nonstationary, nonisothermal, compressible, and turbulent. For calculating the flow around the projectile, the finite volume method was employed. A comparison between two launch tube exit geometries was made. The first case was standard muzzle geometry, where the wall of the bore and the outer surface of the launch tube form a 90 degree angle. The second case included a 26.6 degree bevel transition from the wall of the bore to the outer surface of the launch tube. The results of the calculations are represented in figures depicting the flow at different moments of time. The figures show the fields of velocity, pressure and density, as well as the appearance of shock waves inside the geometry. Some comparisons with calculations of the same problem but using finite-element method were made. The obtained results can be further used for optimization JASPER geometry. The results also can be used for calculating the gun barrels for the strength and the oscillatory stability. In our future study we will couple structural analysis of the gun barrel material with the gas dynamic calculation of motion of the projectile in the gun barrel with the use of advanced computational methods.

Keywords

Computer simulation; Gas flow; Light-gas gun; Physical instruments; Projectiles; Unsteady flow (Fluid dynamics)

Disciplines

Aerodynamics and Fluid Mechanics | Fluid Dynamics | Mechanical Engineering

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Ponyavin, V., Chen, Y., Pepper, D., Hsieh, H. (2004). Numerical Modeling of Unsteady Gas Flow Around the Projectile in the Light Gas Gun. 2004 ASME International Mechanical Engineering Congress and Exposition 495-501. American Society of Mechanical Engineers.