| 摘要 |
<p>The chamber has an internal rotation wall (14) and external rotation wall extending one inside the other and forming a bottom wall of the chamber. Each of the walls has an annular groove (70) extending around a longitudinal axis of the chamber and forming an air film. The groove is supplied with cooling air via orifices (72, 74) formed in the wall. The orifices emerge in the groove and outside the chamber at their ends, respectively. Upstream and downstream side surfaces (76, 78) of the groove are inclined with respect to a zone of the bottom wall at which the groove is situated.</p> |
