CFD-CAA Coupled Computation of Fan Noise Propagation from Engine Nacelle Based on Cartesian Mesh Method

2013 ◽  
Author(s):  
Yuma Fukushima ◽  
Takashi Misaka ◽  
Shinkyu Jeong ◽  
Shigeru Obayashi ◽  
Daisuke Sasaki ◽  
...  
Keyword(s):  
Fan Noise ◽  
Noise Propagation ◽  
Cartesian Mesh ◽  
Mesh Method ◽  
Engine Nacelle

scholarly journals Cartesian Mesh Linearized Euler Equations Solver for Aeroacoustic Problems around Full Aircraft

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Yuma Fukushima ◽  
Daisuke Sasaki ◽  
Kazuhiro Nakahashi
Keyword(s):  
Euler Equations ◽  
Complex Geometry ◽  
Time Integration ◽  
Three Dimensional ◽  
Acoustic Scattering ◽  
Shielding Effect ◽  
Immersed Boundary ◽  
Noise Propagation ◽  
Linearized Euler Equations ◽  
Cartesian Mesh

The linearized Euler equations (LEEs) solver for aeroacoustic problems has been developed on block-structured Cartesian mesh to address complex geometry. Taking advantage of the benefits of Cartesian mesh, we employ high-order schemes for spatial derivatives and for time integration. On the other hand, the difficulty of accommodating curved wall boundaries is addressed by the immersed boundary method. The resulting LEEs solver is robust to complex geometry and numerically efficient in a parallel environment. The accuracy and effectiveness of the present solver are validated by one-dimensional and three-dimensional test cases. Acoustic scattering around a sphere and noise propagation from the JT15D nacelle are computed. The results show good agreement with analytical, computational, and experimental results. Finally, noise propagation around fuselage-wing-nacelle configurations is computed as a practical example. The results show that the sound pressure level below the over-the-wing nacelle (OWN) configuration is much lower than that of the conventional DLR-F6 aircraft configuration due to the shielding effect of the OWN configuration.

Automatic off-body overset adaptive Cartesian mesh method based on an octree approach

2013 ◽  
Vol 232 (1) ◽  
pp. 153-173 ◽  
Author(s):  
Stéphanie Péron ◽  
Christophe Benoit
Keyword(s):  
Cartesian Mesh ◽  
Mesh Method

GFD Predictions of Fan Noise Propagation

2004 ◽  
Author(s):  
Damiano Casalino ◽  
Paolo di Francescantonio ◽  
Yann Druon
Keyword(s):  
Fan Noise ◽  
Noise Propagation
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