Sub-Project 2 for Fan modules
SP2 tests new fan module concepts and measures their aero-acoustic performance (contra-fan or lightweight fan).
Objectives
Fan is critical to achievement of whole engine targets.
• SP2 will address Aerodynamics, Noise and Weight of Very High Bypass Ratio (VHBR) Fans
• Targeting (ref 2000 engines in service):
- 6 EPNdB Noise reduction
- 2% Fan System efficiency
- 25% Weight reduction
Challenge
Approach
• In VITAL SP2 all 3 engine types will be addressed: Direct-drive (DDTF), Geared (GTF) & Contra-Rotating (CRTF)
• A VHBR DDTF (same as GTF) Fan will be designed and Aero/Noise rig tested
• A VHBR CRTF Fan will be designed and Aero/Noise rig tested
• Engine-scale Lightweight (LW)components for VHBR fans will be designed and manufactured and mechanically tested .
Expected results
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- Sub-Project 1 for whole engine assessment
- SP1 oversees the technical unity of the other sub-projects, and is in charge of design for each of the three engine architectures.
- Sub-Project 3 for Booster
- SP3 evaluates the slow and high-speed booster (low-pressure compressors) concepts applicable to the different configurations.
- Sub-Project 4 for Structures
- SP4 focuses on new lightweight structural material (Hot and cold structures form the engine " back bone"). They provide basic engine stiffness and transfer high mechanical loads to and from the engine interior. Therefore the structures contributes to 15 - 20% of the engine weight.
- Sub-Project 5 for Low pressure shaft
- SP5 tests new concepts for a low-pressure shaft (which has to handle higher torque loads because of the slower fan speed). (Source : Brochure)
- Sub-Project 6 for Low pressure turbine
- SP6 seeks to identify new, lighter and quieter turbine concepts.
- Sub-Project 7 for Installation
- SP7 evaluates the impact of installing a high-bypass-ratio engine under the wing.