Aerodynamic Design and Experimental Investigation of Short Nacelles for Future Turbofan Engines
This thesis presents a newly developed methodology for multi-point design of ultra-short nacelles. An integrated aerodynamic framework, based on parametric geometry generation and computational fluid dynamics (CFD) flow solutions was built and used for designing several ultra-short nacelle shapes and to evaluate their aerodynamic performance. The main design parameters and their influence in the flow field were investigated for the most critical operating conditions among the flight mission, such as cruise, high angle-of-attack (AoA) and crosswind. The aerodynamic performance of the designed nacelles was evaluated through a thrust and drag bookkeeping approach, and also by means of the distortion levels at the fan face.
Furthermore, this work summarizes the main results obtained in an experimental aerodynamic investigation of a powered turbofan nacelle, conducted at the Chalmers low-speed wind tunnel. The impact of the engine angle-of-attack and the mass flow ratio (MFR) on the nacellle aerodynamic performance was investigated.
Computational Fluid Dynamics
Vinícius Tavares Silva
Chalmers, Mekanik och maritima vetenskaper, Strömningslära
Silva, V.T., Lundbladh, A., Xisto, C., Petit, O. Multi-point Aerodynamic Design of Ultra-short Nacelles for Ultra-high Bypass Turbofan EnginesMulti-point Aerodynamic Design of Ultra-short Nacelles for Ultra-high Bypass Turbofan Engines
Rymd- och flygteknik
Strömningsmekanik och akustik
Thesis for the degree of Licentiate – Department of Mechanics and Maritime Sciences
Chalmers tekniska högskola
M2 Room Navier
Opponent: Fredrik Wallin, GKN Aerospace, Sweden