Simulation of Friction, Wear, and Gouging for a Hypervelocity Guide-Rail System
Abstract
A computer model was developed to describe friction, wear, and gouging that may occur at the projectile-rail interface of a hypervelocity projectile being guided by alignment rails. Study of the gasdynamics of the interface region reveals that three types of flow can occur depending upon the associated Reynolds number computed with respect to projectile/rail separation, Re sub h. The flow conditions are laminar Couette flow Re (sub h < 1,000); turbulent Couette flow (1,000 < Re sub H < 100,000); turbulent boundary flow (Re sub h > 100,000). Pressures developed within the gap affect the projectile dynamics significantly and, in turn, are affected by projectile motions and orientations produced by external gasdynamics interactions. In general, the interface pressures act to promote dynamic stability of projectiles in flight. Accordingly, a complete treatment of interface regions required development of a Projectile Dynamics Computer Program which describes the complete process of rigid projectiles passing along rail guidance systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1978
- Accession Number
- ADA054997
Entities
People
- Hallock F. Swift
- John P. Barber
- Louis I. Boehman
Organizations
- University of Dayton