... throughout. The lack of specific spectral emission lines implies that in the interior of the fireball any combustion that occurred was probably primarily with carbonaceous soot, though differences in optical depth at different locations in the fireball indicate that it was much more fuel-rich closer...

...Julien Nussbaum; Philippe Helluy; Jean-Marc Herard; Barbara Baschung Complex phenomena occur in a combustion chamber during a ballistic cycle. From the ignition of the black powder in the primer to the exit of the projectile through the muzzle, two-phase gas-powder mix undertakes various transfers...

... is focused on the effects on the SRM behavior of the erosive burning, total pressure drops and the cause of the pressure overpeak occurring during the last part of the ignition transient. The final objective is to develop an analysis/simulation capability of SRM internal ballistics for the entire combustion...

... carried out with the assumption that the combustion process thermally choked the flow about one projectile length behind the projectile base. Thus the control volume length used in this 1D modeling was twice the projectile length, which is consistent with experimental observations at velocities...

...Yonggang Yu; Xuexia Chang; Na Zhao; Shanshan Mang; Yanhuang Zhou The multilevel stepped-wall chamber is designed to study the combustion stability control mechanism of the bulk-loaded liquid propellant gun (BLPG). The cold state experiment of the interaction of the high speed gas jet with liquid...

...K. Kluz; E. S. Geskin The work presented investigates numerically and experimentally a formation of high velocity liquid projectiles in the course of the unsteady water acceleration by gaseous products of a propellant combustion. The projectiles were generated in a water launcher, a cylindrical...

... of this motion has an important influence on the stability of CTA interior ballistic performance. The experiments on the ignition and combustion of propellants and motion of projectile in the control tube are carried out using a high-speed video recording system in this study. The projectile velocity...

...Yonggang Yu; Shanheng Yan; Na Zhao; Xin Lu; Yanhuang Zhou The multilevel stepped-wall and rectangular observation chambers are designed to study the multipoint ignition process and the combustion stability control mechanism of the bulk-loaded liquid propellant gun. The expansion process...

... and test data, it was found that the approximate Riemann solver is a suitable method for studying the two-phase combustion processes in mortar systems. 23 07 2009 27 01 2010 08 04 2010 17 05 2010 17 05 2010 combustion entropy flow mesh generation mortar partial...

... response. The physical motivation of this problem is thermoacoustic dynamics in a gas turbine combustor. The spatial domain is periodic (passive annular acoustics) which are driven by heat released from a combustion process, and with sufficient driving through this nonlinear feedback a limit cycle...

...Rossella Rotondi Mixture formation and combustion in a gasoline direct injection (GDI) engine were studied. A swirl-type nozzle, with an inwardly opening pintle, was used to inject the fuel directly in a four stroke, four cylinder, four valves per cylinder engine. The atomization of the hollow cone...

... against experiment for methane-air combustion in a coaxial geometry, and jet-A surrogate/air combustion in a gas-turbine combustor geometry. 15 12 2003 09 11 2005 flow simulation chemically reactive flow turbulence combustion flames heat transfer gas turbines Mach number jets...

... temperatures in excess of 900 K are predicted near intergranular contact surfaces for impact speeds as low as 100 m ∕ s ; these hot spots are sufficient to induce sustained combustion as determined by a two-phase thermal explosion theory. Thermal conduction and phase change significantly affect hot-spot...