Options
1993
Journal Article
Titel
Radial gas velocity and gas temperature in the tube flow of a caliber 20-mm gas gun
Alternative
Radiale Verteilungen von Gasgeschwindigkeit und Temperatur in der Rohrströmung einer 20-mm-Gaskanone
Abstract
A single-stage gas gun driven by mixtures of H2, O2, and He or H2, O2, He, and CO has been used to simulate gun tube flows at realistic pressures and temperatures. Radial gas velocity distribution, mean gas temperature and gas-wall interface temperature has been measured together with gas pressure and muzzle velocity. The radial temperature distribution has been estimated from the velocity measurements. The results show that the momentum and thermal boundary layers are in excess of 5 mm thick and are much thicker than theory usually predicts; this is attributed to a more rapid diffusion of turbulence from the bore surface towards the bore axis.