Efficient Scale-Resolving Simulations of Open Cavity Flows for Straight and Sideslip Conditions
Abstract
:1. Introduction
2. Cavity Model and Mesh
2.1. Description of the Cavity
2.2. Mesh
3. Simulation Methodologies
3.1. Hybrid RANS-LES Approach
3.2. Scale-Adaptive Approach
3.3. Wall Treatment
3.4. Artificial Forcing
3.5. Computational Time Requirements
4. Results and Discussion
4.1. Prediction of Acoustic Spectrum
4.2. Performance of the Different SAS Variants
4.2.1. Prediction of SPL
4.2.2. Prediction of RMS Pressure
4.2.3. Prediction of the Turbulent Flow Field
4.2.4. Prediction of von Karman Length Scale and Boundary Layer Thicknesses
4.3. Impact of Asymmetric Flow Conditions
5. Conclusions and Outlook
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Mesh A | Mesh B | Mesh C | |
---|---|---|---|
Number of mesh nodes | |||
of the first element | |||
Number of prism cells | 35 | 35 | 35 |
Resolution in Regions I and II |
DES-WF | SAS-WR | SAS-WF | SAS-F | |
---|---|---|---|---|
Number of mesh nodes | ||||
of the first element | >100.0 | <1.0 | >100.0 | >100.0 |
Number of prism cells | 10 | 35 | 10 | 10 |
Resolution in Region I | ||||
Resolution in Region II | - | - | - |
DES-WF | SAS-WR | SAS-WF | SAS-F | |
---|---|---|---|---|
Number of outer iterations per time step | 200 | 200 | 200 | 200 |
Physical time step size | 1.5 | 7 | 7 | 7 |
Drop in density residual within one time step | ∼O () | ∼O () | ∼O () | ∼O () |
Comp. cost reduction relative to DES-WR |
Mode | Theory | Exp. | DES-WF | SAS-WR | SAS-WF | SAS-F |
---|---|---|---|---|---|---|
1 | 263 | 272 | 278 | 279 | 280 | 285 |
2 | 670 | 755 | 722 | 719 | 719 | 743 |
3 | 1076 | 1160 | 1167 | 1159 | 1159 | 1143 |
4 | 1484 | 1600 | 1611 | 1599 | 1519 | 1600 |
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Rajkumar, K.; Tangermann, E.; Klein, M. Efficient Scale-Resolving Simulations of Open Cavity Flows for Straight and Sideslip Conditions. Fluids 2023, 8, 227. https://doi.org/10.3390/fluids8080227
Rajkumar K, Tangermann E, Klein M. Efficient Scale-Resolving Simulations of Open Cavity Flows for Straight and Sideslip Conditions. Fluids. 2023; 8(8):227. https://doi.org/10.3390/fluids8080227
Chicago/Turabian StyleRajkumar, Karthick, Eike Tangermann, and Markus Klein. 2023. "Efficient Scale-Resolving Simulations of Open Cavity Flows for Straight and Sideslip Conditions" Fluids 8, no. 8: 227. https://doi.org/10.3390/fluids8080227