| 摘要 |
<p>The device (50) has an annular body (52) extending around a casing (12) and comprising an annular cavity for supplying air to annular air circulation ramps (56), which are axially spaced from each other and perforated for discharging the air on the casing. Evacuation units evacuate the discharged air toward a downstream. An internal wall (58) of the body comprises a set of openings (84) for communication between the cavity and the ramps for air supply, and another set of openings for communication between inter-ramp axial spaces and a chamber (70) for recovery and evacuation of the air.</p> |
