Author(s)

R. Heiser, F. Seiler, K. Zimmermann & G. Zettler

Abstract

Computational methods and measurements of heat transfer to the barrel of a hot gas accelerator under high pressure R. Heiser", F. Seiler\ K. Zimmermann\ G. Zettler^ ^Fraunhofer-Institut fur Kurzzeitdynamik, Weil am Rhein, Germany 5 Saint-Louis, France ABSTRACT The action of the hot and compressed propellant gas flow in a gun barrel behind a projectile on heat transfer to the barrel wall has been investigated by experimental and theoretical methods. For theoreti- cal description of the in-bore flow development two interior ballistic models will be applied: On the one hand a numerical model for solving the full Navier-Stokes equations including a turbulence mo- del, and on the other hand an analytical boundary layer model using the boundary layer equations of Prandtl. The results of both models describing the deve- lopment of the compressible, turbulent boundary layer at the inner tube wall are compared with heat transfer measurements perfo

Keywords