Author(s)

F. Seiler, H. Peter, G. Mathieu, G. Zettler

Abstract

Theoretical and experimental study on heat transfer behaviour in gun tubes using aerosil additive for surface erosion protection F. Seller, H. Peter, G. Mathieu, G. Zettler French-German Research Institute of Saint-Louis (ISL), Saint-Louis, France Abstract The action of additive particles on reducing heat transfer from the hot, compressed propellant gas flow into the barrel of a powder gun has been investigated by both theoretical considerations and experiments performed at the 20 mm calibre erosion gun of ISL. For this purpose a boundary layer model was developed and its theoretical results were compared with bore temperature measurements carried out at two measuring stations which are placed near the forcing cone inside the gun tube. For theoretical description, Prandtl's boundary layer equations were applied to solve the unsteady, compressible and turbulent boundary layer development for determination of the heat flux q(x) from propellant gas to barrel wall. A solution of the

Keywords