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August 12, 2026Journal of Turbomachinery

Development of a New Rans-Based Surface Roughness Model for Multi-Fidelity 3d CFD

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Authors

IVIlias VasilopoulosDADario AmiranteMMMarcus Meyer

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Overview

Randomized trial investigates surface roughness impacts in turbomachinery, indicating improved modeling accuracy.

Key Points

  • The aim is to develop a new surface roughness model integrated into a RANS solver to improve flow simulations in turbomachinery applications.
  • Implemented a new roughness model in an in-house RANS solver using the k-ω SST turbulence model.
  • Trained the model to match pressure losses from roughness-resolved channel flow simulations.
  • Conducted verification and experimental validation using a high-pressure turbine cascade setup.
  • The model demonstrated increased turbulent viscosity, effectively capturing pressure losses in various configurations.
  • Verification showed consistency with experimental data across zero and non-zero pressure gradient channel flows.
  • Extension of roughness modeling capabilities to high-fidelity scale-resolving simulations was successfully demonstrated.

Cite This Study

Vasilopoulos et al. (2026) studied this question.

synapsesocial.com/papers/6a7c209506a85aed514b76achttps://doi.org/10.1115/1.4072502
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