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Matha, Marcel and Morsbach, Christian (2020) Exploring turbulence model uncertainties in turbomachinery applications. 73rd Annual Meeting of the APS Division of Fluid Dynamics, 22.-24. Nov. 2020, Onlinekonferenz.
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Abstract
The aerodynamic design of modern jet engines is highly affected by the prediction capabilities of the CFD-solver close to the operation limits. Since Reynolds-averaged Navier-Stokes (RANS) simulations are the workhorse in industrial development of jet engines, the accuracy of turbulence closure models is one of the main limitations in that process striving for future environmental friendly designs. Due to simplifying assumptions during the creation of turbulence models, the prediction accuracy of RANS computations is reduced in the presence of adverse pressure gradient, flow separation and bursting vortices. Consequently, these assumptions lead to a significant degree of epistemic uncertainty. The methodology to quantify these structural uncertainties based on eigenspace perturbations of the Reynolds stress tensor was implemented in the solver TRACE, being developed by DLR’s Institute of Propulsion Technology. In this investigation, we apply this implementation to turbulent flow cases pertinent to turbomachinery applications. Across these case studies, including DLR's 3D diffuser, the uncertainty bounds on such test case with respect to the closure model are presented in comparison with experimemental data.
| Item URL in elib: | https://elib.dlr.de/140390/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | Exploring turbulence model uncertainties in turbomachinery applications | |||||||||
| Authors: |
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| Date: | 2020 | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Published | |||||||||
| Keywords: | turbulence model, uncertainty quantification, CFD, data-free | |||||||||
| Event Title: | 73rd Annual Meeting of the APS Division of Fluid Dynamics | |||||||||
| Event Location: | Onlinekonferenz | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | 22.-24. Nov. 2020 | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | propulsion systems | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L ER - Engine Research | |||||||||
| DLR - Research theme (Project): | L - Virtual Engine and Validation methods (old) | |||||||||
| Location: | Köln-Porz | |||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Numerical Methodes | |||||||||
| Deposited By: | Matha, Marcel | |||||||||
| Deposited On: | 18 Jan 2021 10:45 | |||||||||
| Last Modified: | 18 Jan 2021 10:45 |
Available Versions of this Item
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Exploring turbulence model uncertainties in turbomachinery applications. (deposited 18 Jan 2021 09:19)
- Exploring turbulence model uncertainties in turbomachinery applications. (deposited 18 Jan 2021 10:45) [Currently Displayed]
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