TY - GEN
T1 - CFD-CAA coupled computation of fan noise propagation from engine nacelle based on Cartesian mesh method
AU - Fukushima, Yuma
AU - Misaka, Takashi
AU - Obayashi, Shigeru
AU - Jeong, Shinkyu
AU - Sasaki, Daisuke
AU - Nakahashi, Kazuhiro
PY - 2013
Y1 - 2013
N2 - In this paper, the coupling computation of Computational Fluid Dynamics (CFD) and Computational AeroAcoustics (CAA) is conducted. Three operating conditions of the JT15D nacelle configuration are analyzed. Fan noise from the engine inlet is simulated in each condition. Computation is based on the Cartesian mesh method called Building-Cube Method (BCM). Firstly, the background flow is computed by a compressible Euler solver. And then, the noise propagation from the nacelle is computed by the Linearized Euler Equations (LEE) code. Finally, the far-field noise directivity is estimated by the Ffowcs-Williams and Hawkings (FW-H) method. The low speed flow around the JT15D nacelle was successfully simulated by using Simple Low-dissipative AUSM, which can deal with all speed flows. Sound wave propagation in the radial direction was pronounced at the lower frequency condition. In three conditions, the FW-H estimation of far-field Sound Pressure Level showed the good agreement with the experimental measurements qualitatively.
AB - In this paper, the coupling computation of Computational Fluid Dynamics (CFD) and Computational AeroAcoustics (CAA) is conducted. Three operating conditions of the JT15D nacelle configuration are analyzed. Fan noise from the engine inlet is simulated in each condition. Computation is based on the Cartesian mesh method called Building-Cube Method (BCM). Firstly, the background flow is computed by a compressible Euler solver. And then, the noise propagation from the nacelle is computed by the Linearized Euler Equations (LEE) code. Finally, the far-field noise directivity is estimated by the Ffowcs-Williams and Hawkings (FW-H) method. The low speed flow around the JT15D nacelle was successfully simulated by using Simple Low-dissipative AUSM, which can deal with all speed flows. Sound wave propagation in the radial direction was pronounced at the lower frequency condition. In three conditions, the FW-H estimation of far-field Sound Pressure Level showed the good agreement with the experimental measurements qualitatively.
UR - http://www.scopus.com/inward/record.url?scp=84883725812&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84883725812
SN - 9781624102134
T3 - 19th AIAA/CEAS Aeroacoustics Conference
SP - 19
BT - 19th AIAA/CEAS Aeroacoustics Conference
T2 - 19th AIAA/CEAS Aeroacoustics Conference
Y2 - 27 May 2013 through 29 May 2013
ER -