Abstract
Jet installation beneath a wing significantly enhances jet noise at low frequencies, and its
physical mechanism must be comprehended to develop efficient noise reduction solutions. A
numerical investigation on the jet-installation noise is performed usingWall Modelled Large
Eddy Simulation (WMLES) performed using the high-resolutionCABARET method accelerated
on Graphics Processing Units. To simulate jet installation, a flat plate is put outside of the jet’s
plume, causing a rise in noise levels due to the scattering of near-field hydrodynamic waves
at the trailing edge of the plate. The configuration adopted in this work replicates a series
of experiments performed at the University of Bristol, against which the numerical results
are validated. The numerical simulation is performed for Mach numbers of 0.5 and 0.9, and
the influence of the selected noise reduction technique, i.e., the usage of chevron nozzles in
comparison with the baseline round nozzle, on the jet-installation is studied by modelling
SMC006 chevron nozzle. The properties of jet-hydrodynamic pressure variations and their
effect on nozzle type and Mach number are investigated. Far-field noise spectra from the
isolated and installed jet cases, obtained through the Ffowcs-Williams Hawkings method, are
compared at different polar angles. In addition, a hybrid semi-analytical hydrodynamic-edge
scattering prediction model is implemented following the model of Lyu and Dowling [1] to
analyse jet-installation noise, using inputs obtained directly from the LES calculation. The
implemented model is found to capture the correct physics at peak jet installation frequencies
and can be used as a robust prediction tool for jet-installation noise optimisation in the future.
physical mechanism must be comprehended to develop efficient noise reduction solutions. A
numerical investigation on the jet-installation noise is performed usingWall Modelled Large
Eddy Simulation (WMLES) performed using the high-resolutionCABARET method accelerated
on Graphics Processing Units. To simulate jet installation, a flat plate is put outside of the jet’s
plume, causing a rise in noise levels due to the scattering of near-field hydrodynamic waves
at the trailing edge of the plate. The configuration adopted in this work replicates a series
of experiments performed at the University of Bristol, against which the numerical results
are validated. The numerical simulation is performed for Mach numbers of 0.5 and 0.9, and
the influence of the selected noise reduction technique, i.e., the usage of chevron nozzles in
comparison with the baseline round nozzle, on the jet-installation is studied by modelling
SMC006 chevron nozzle. The properties of jet-hydrodynamic pressure variations and their
effect on nozzle type and Mach number are investigated. Far-field noise spectra from the
isolated and installed jet cases, obtained through the Ffowcs-Williams Hawkings method, are
compared at different polar angles. In addition, a hybrid semi-analytical hydrodynamic-edge
scattering prediction model is implemented following the model of Lyu and Dowling [1] to
analyse jet-installation noise, using inputs obtained directly from the LES calculation. The
implemented model is found to capture the correct physics at peak jet installation frequencies
and can be used as a robust prediction tool for jet-installation noise optimisation in the future.
| Original language | English |
|---|---|
| Title of host publication | 28th AIAA/CEAS Aeroacoustics Conference, 2022 |
| Publisher | American Institute of Aeronautics and Astronautics Inc. (AIAA) |
| ISBN (Electronic) | 9781624106644 |
| ISBN (Print) | 9781624106644 |
| DOIs | |
| Publication status | Published - 13 Jun 2022 |
| Event | 28th AIAA/CEAS Aeroacoustics 2022 Conference - United Kingdom, Southampton, United Kingdom Duration: 14 Jun 2022 → 17 Jun 2022 https://doi.org/10.2514/6.2022-3095 |
Publication series
| Name | AIAA/CEAS Aeroacoustics Conference |
|---|---|
| Publisher | AIAA |
| ISSN (Print) | 1946-7826 |
Conference
| Conference | 28th AIAA/CEAS Aeroacoustics 2022 Conference |
|---|---|
| Country/Territory | United Kingdom |
| City | Southampton |
| Period | 14/06/22 → 17/06/22 |
| Internet address |
Bibliographical note
Funding Information:The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for supporting this research (Grant No. EP/S000917/1 and EP/S002065/1). Sergey A. Karabasov gratefully acknowledges the financial support provided by the Ministry of Science and Higher Education of the Russian Federation (Grant agreement of December 8, 2020 № 075-11-2020-023) within the program for the creation and development of the World-Class Research Center “Supersonic” for 2020-2025. The authors also acknowledge the use of Tier-2 high-performance computing (HPC) facility JADE-2, funded by the EPSRC on the grant (EP/T022205/1) and Queen Mary’s Apocrita HPC facility, supported by QMUL Research-IT. http://doi.org/10.5281/zenodo.438045
Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Keywords
- jet noise
- GPU LES
- LES
- Experiments
- Aeroacoustics
- jet installation