DDES Study on the Influence of a Whisker Trailing Edge on the Wake-Blade Interaction of a High-Pressure Turbine Stage
Publication: Journal of Aerospace Engineering
Volume 37, Issue 2
Abstract
In this study, the whisker structure of a harbor seal is utilized on the trailing edge of a high-pressure turbine stage to control the interaction between the wake and the blade. The paper investigates two cases: a prototype high-pressure turbine stage, and a biomimetic turbine stage where the vane and blade trailing edges are modified to mimic the whisker structure. The flow in the prototype and the biomimetic turbine stage is simulated using the delayed detached-eddy simulation (DDES) method. Results show that fluid behind the whisker trailing edge converges to the valley region. The whisker trailing edge transforms the Karman vortices into hairpin vortices, narrowing the wake area of the vane. A narrower wake area delays the interaction between the wake core area and the blade. The prototype vane’s pressure-side and suction-side shedding vortices interact with the leading edge of the blade, resulting in large pressure fluctuations. The whisker trailing edge weakens the impact of the wake on the blade’s leading edge, significantly reducing the amplitude of pressure fluctuation at the blade’s leading edge. Meanwhile, the whisker trailing edge minimizes the adhesion of the small vortices on the blade, suppressing the high-frequency pressure pulsation at the blade’s leading edge. Moreover, the breaking of the Karman vortex suppresses the rotational velocity field in the blade passage. The suppression of the rotational velocity field of the shedding vortex reduces the velocity fluctuations in the blade’s near-wall region and boundary layer.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors acknowledge financial support from the Natural Major Science and Technology Project of China (No. 2017-I-0005-0006) and the Outstanding Youth Science Foundation of Heilongjiang Province of China (No. YQ2020E016).
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 37 • Issue 2 • March 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Sep 5, 2022
Accepted: Sep 27, 2023
Published online: Dec 6, 2023
Published in print: Mar 1, 2024
Discussion open until: May 6, 2024
ASCE Technical Topics:
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Engines
- Equipment and machinery
- Flow simulation
- Fluid dynamics
- Fluid mechanics
- Harbor facilities
- Hydraulic engineering
- Hydraulic structures
- Hydrologic engineering
- Models (by type)
- Motion (dynamics)
- Ports and harbors
- Rotation
- Solid mechanics
- Structural control
- Structural engineering
- Structural health monitoring
- Turbines
- Vanes
- Vortices
- Water and water resources
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