Brès, Guillaume A. and Jaunet, Vincent and Le Rallic, Maxime and Jordan, Peter and Colonius, Tim and Lele, Sanjiva K. (2015) Large eddy simulation for jet noise: the importance of getting the boundary layer right. In: 21st AIAA/CEAS Aeroacoustics Conference, 22-26 June 2015, Dallas, TX. https://resolver.caltech.edu/CaltechAUTHORS:20190712-112322014
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Abstract
Large eddy simulations of an isothermal Mach 0.9 jet issued from a convergent-straight nozzle are performed at Reynolds number 1 × 10^6. The flow configuration and operating conditions match the companion experiment conducted at the PPRIME Institute, Poitiers. To replicate the effects of the boundary layer trip present in the experiment and to ensure a turbulent jet, localized adaptive mesh refinement, synthetic turbulence, and wall modeling are used inside the nozzle. This leads to fully turbulent nozzle-exit boundary layers and results in significant improvements for the flow field and sound predictions, compared to those obtained from the typical approach based on laminar flow assumption in the nozzle. The far-field noise spectra now match the experimental measurements to within 0.5 dB for relevant angles and frequencies. As a next step toward better understanding of turbulent jet noise, the large database collected during the simulation is currently being used for reduced order modeling and wavepacket analysis.
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| Additional Information: | © 2015 by the authors. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 18 Jun 2015. The preliminary LES studies were supported by NAVAIR SBIR project, under the supervision of Dr. John T. Spyropoulos. The main calculations were carried out on CRAY XE6 machines at DoD supercomputer facilities in ERDC DSRC. P. Jordan acknowledges the support of the French National Research Agency (ANR) through the project COOLJAZZ. Part of this work was performed during the Center for Turbulence Research Summer Program 2014 at Stanford University. | |||||||||
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| Subject Keywords: | Aeroacoustics | |||||||||
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| DOI: | 10.2514/6.2015-2535 | |||||||||
| Record Number: | CaltechAUTHORS:20190712-112322014 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190712-112322014 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 97111 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Melissa Ray | |||||||||
| Deposited On: | 15 Jul 2019 18:33 | |||||||||
| Last Modified: | 16 Nov 2021 17:26 |
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