| abstract |
This nozzle (1), which is placed in a sheath (50), comprises a tubular introduction portion (10), of cylindrical shape, which has a length of between 10 and 30% of the total length of the nozzle, and a tubular dispersion portion (20), in the form of a hollow cylinder portion, extending in the extension of the introduction portion, this dispersion portion having an upper generatrix pierced with orifices (22) for flue passages, having an area of between 2 and 15% of the nozzle cross-section, that dispersion portion (20) having a length greater than or equal to twice the length of the introducing portion (10). |