Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Standard

Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. / Mihaescu, Mihai; Gutmark, Ephraim; Szász, Robert-Zoltán; Fuchs, Laszlo; Martens, S.

45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics, 2007.

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Harvard

Mihaescu, M, Gutmark, E, Szász, R-Z, Fuchs, L & Martens, S 2007, Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. in 45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, United States, 2007/01/08.

APA

Mihaescu, M., Gutmark, E., Szász, R-Z., Fuchs, L., & Martens, S. (2007). Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. In 45th AIAA Aerospace Science Meeting Proceedings American Institute of Aeronautics and Astronautics.

CBE

Mihaescu M, Gutmark E, Szász R-Z, Fuchs L, Martens S. 2007. Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. In 45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics.

MLA

Mihaescu, Mihai et al. "Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle". 45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics. 2007.

Vancouver

Mihaescu M, Gutmark E, Szász R-Z, Fuchs L, Martens S. Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. In 45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics. 2007

Author

Mihaescu, Mihai ; Gutmark, Ephraim ; Szász, Robert-Zoltán ; Fuchs, Laszlo ; Martens, S. / Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle. 45th AIAA Aerospace Science Meeting Proceedings. American Institute of Aeronautics and Astronautics, 2007.

RIS

TY - GEN

T1 - Computational aeroacoustics of a s eparate flow exhaust system with eccentric inner nozzle

AU - Mihaescu, Mihai

AU - Gutmark, Ephraim

AU - Szász, Robert-Zoltán

AU - Fuchs, Laszlo

AU - Martens, S.

PY - 2007

Y1 - 2007

N2 - A major issue related to our modern way of life is the noise caused by jet engine powered airliners. Methods to reduce the jet noise were proposed in the last decades starting with the introduction of high bypass turbofan engines. A numerical investigation of flow and acoustics of a separate flow exhaust system is performed in the present paper. The goal is to investigate how the noise generated by a separate flow jet engine exhaust is influenced if the symmetry of the jet exhaust geometry is broken by having the inner nozzle and the center body off the center line axis of the fan nozzle. A decomposition of flow variables is used that allows separation of flow and acoustic computations. Large Eddy Simulation approach is employed to compute the flow field and the acoustic sources. The inhomogeneous wave equation is used to compute the acoustic near- and far-fields. Using this method, previous numerical studies of the symmetric (baseline) configuration showed good agreement between the computed data and the experimental results. Comparisons between the near- and far-field baseline concentric case and the computations obtained using the eccentric configuration are performed showing an acoustic benefit for the offset case.

AB - A major issue related to our modern way of life is the noise caused by jet engine powered airliners. Methods to reduce the jet noise were proposed in the last decades starting with the introduction of high bypass turbofan engines. A numerical investigation of flow and acoustics of a separate flow exhaust system is performed in the present paper. The goal is to investigate how the noise generated by a separate flow jet engine exhaust is influenced if the symmetry of the jet exhaust geometry is broken by having the inner nozzle and the center body off the center line axis of the fan nozzle. A decomposition of flow variables is used that allows separation of flow and acoustic computations. Large Eddy Simulation approach is employed to compute the flow field and the acoustic sources. The inhomogeneous wave equation is used to compute the acoustic near- and far-fields. Using this method, previous numerical studies of the symmetric (baseline) configuration showed good agreement between the computed data and the experimental results. Comparisons between the near- and far-field baseline concentric case and the computations obtained using the eccentric configuration are performed showing an acoustic benefit for the offset case.

M3 - Paper in conference proceeding

BT - 45th AIAA Aerospace Science Meeting Proceedings

PB - American Institute of Aeronautics and Astronautics

T2 - 45th AIAA Aerospace Sciences Meeting and Exhibit

Y2 - 8 January 2007 through 11 January 2007

ER -