| 摘要 |
<p>The device has three injectors (16, 18, 20) mounted between inner and outer sleeves (12, 14), each having an aerodynamic profile with concave and convex sides. An air coolant is ejected towards openings in a passage to form an aerodynamic neck. A bimetallic structure and a metallic material with higher and lower thermal expansion coefficients, modify a section of the neck as a function of coolant temperature.</p> |
