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August 17, 2025

URANS Investigation of Unsteady Wakes and Purged Hub Cavity Impact on the Aerodynamics of a High Speed Low-Pressure Turbine Cascade

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Authors

ASAlessandro SchenattiTBT BontempsLBLuis Bernardos

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Overview

URANS simulations reveal unsteady wakes and purged cavities modify secondary flows in turbine cascades, suggesting significant aerodynamic changes.

Key Points

  • Inclusion of purge flow leads to a periodic reduction of secondary flows and downstream losses.
  • The introduction of purge flow resulted in a 2.5% increase in total pressure losses at the dominant loss core.
  • URANS simulations accurately predict pressure fluctuations on the blade skin, aligning well with experimental data.
  • Unsteady wakes contribute to a spanwise migration of the secondary flow structures by about 3.5% of the blade span.

Cite This Study

Schenatti et al. (2025) studied this question.

synapsesocial.com/papers/68a36f840a429f797333208ahttps://doi.org/10.1115/gt2025-151856
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