风扇进气入口装置及飞机
By setting a rectangular-to-circular transition rib on the inside of the fan air inlet device, the noise and vibration problems caused by pressure fluctuations are solved, pressure fluctuations are reduced and aerodynamic performance is maintained, and processing and installation are simplified.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- COMMERCIAL AIRCRAFT CORP OF CHINA LTD
- Filing Date
- 2024-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technology causes pressure fluctuations at the air intake of aircraft engine fans, resulting in noise and vibration, which affects the safety and comfort of the aircraft, while also increasing the size of the fan air intake components or reducing aerodynamic performance.
Design a fan air intake device, including a rectangular inlet, a circular or elliptical outlet, and ribs at the four inner corners. The ribs gradually transition from the inlet to the outlet. The cross-sectional area of the ribs accounts for 0.5 to 1.0% of the flow cross-sectional area, and the height is 3 to 7 mm. The material is cast aluminum, stainless steel, or titanium alloy, and it is integrally formed by 3D printing.
It effectively reduces pressure fluctuation amplitude to below 4 psi, with almost no impact on the aerodynamic performance of the engine or fan inlet, maintaining high aerodynamic efficiency and thrust, and simplifying processing and installation.
Smart Images
Figure CN118790485B_ABST