Large eddy simulation of a Mach 0.9 turbulent jet
Abstract
Large eddy simulations of an isothermal Mach 0.9 jet (Re = 10^6) issued from a convergent-straight nozzle are performed using the compressible flow solver CharLES. 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 (Jordan et al. 2014).
Additional Information
© 2014 Stanford University Center for Turbulence Research. The preliminary LES studies were supported by a NAVAIR SBIR grant managed by Dr. John T. Spyropoulos. The simulations were performed as part of the DoD HPCMP Challenge Project entitled Large Eddy Simulations of Supersonic Jet Noise and Combustor & Augmentor Spray Atomization. The main calculations were carried out on CRAY XE6 machines at DoD supercomputer facilities in ERDC DSRC.Attached Files
Published - BresJordanColoniusEtAl2014.pdf
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Additional details
- Eprint ID
- 97109
- Resolver ID
- CaltechAUTHORS:20190712-112321468
- Naval Air Systems Command (NAVAIR)
- Created
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2019-07-15Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field