2-D H-Adaptive Finite Element Method for Gas Gun Design
Document Type
Article
Publication Date
11-15-2003
Publication Title
Fluid Engineering Division
Volume
259
First page number:
345
Last page number:
353
Abstract
The Joint Actinide Shock Physics Experimental Research (JASPER) facility utilizes a two-stage light gas gun to conduct equation of state experiments. The gun has a launch tube bore diameter of 28 mm, and is capable of launching projectiles at a velocity of 7.5 km/s using compressed hydrogen as a propellant. A numerical study is conducted to determine the effects that launch tube exit geometry changes have on attitude of the projectile in flight. A comparison of two launch tube exit geometries is considered. The first case is standard muzzle geometry where the wall of the bore and the outer surface of the launch tube form a right angle. The second case includes a beveled transition from the wall of the bore to the outer surface of the launch tube. An h-adaptive, Petrov-Galerkin finite element method is employed to model the axisymmetric compressible flow equations. Numerical solutions indicate that pressure variations occur on the back face of the projectile from case to case.
Keywords
Geometry; Light gas gun; Physics – Experiments – Equipment and supplies; Projectiles; Tubes
Disciplines
Aerodynamics and Fluid Mechanics | Engineering | Mechanical Engineering | Physics
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
deBues, T. T.,
Pepper, D.,
Chen, Y.
(2003).
2-D H-Adaptive Finite Element Method for Gas Gun Design.
Fluid Engineering Division, 259
345-353.