Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis
The present research focused on the analysis of the leakage flows developing from advanced blade tip geometries. The aerodynamic field of a contoured blade tip and of a high-performance rimmed blade were investigated against a baseline squealer rotor. Time-resolved numerical predictions were combine...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | International Journal of Turbomachinery, Propulsion and Power |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-186X/4/2/12 |
| _version_ | 1828235011670671360 |
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| author | Bogdan C. Cernat Sergio Lavagnoli |
| author_facet | Bogdan C. Cernat Sergio Lavagnoli |
| author_sort | Bogdan C. Cernat |
| collection | DOAJ |
| description | The present research focused on the analysis of the leakage flows developing from advanced blade tip geometries. The aerodynamic field of a contoured blade tip and of a high-performance rimmed blade were investigated against a baseline squealer rotor. Time-resolved numerical predictions were combined with high-frequency pressure measurements to characterize the tip leakage flow of each tip design. High spatial and temporal resolution measurements provided a detailed representation of the unsteady flow in the near-tip region and at the stage outlet. Numerical computations, based on the nonlinear harmonic method, were employed to assess the unsteady blade row interactions and identify the loss generation mechanisms depending on the tip design. The space- and time-resolved flow field was analysed by modal decomposition to identify the main periodicities of the near-tip and outlet flow and classify the most relevant sources of aerodynamic unsteadiness and entropy generation across the stage. |
| first_indexed | 2024-04-12T20:06:02Z |
| format | Article |
| id | doaj.art-adf859445d68486cba953a105abb6140 |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-04-12T20:06:02Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-adf859445d68486cba953a105abb61402022-12-22T03:18:23ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2019-05-01421210.3390/ijtpp4020012ijtpp4020012Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition AnalysisBogdan C. Cernat0Sergio Lavagnoli1Von Karman Institute for Fluid Dynamics, 1640 Sint-Genesius-Rode, BelgiumVon Karman Institute for Fluid Dynamics, 1640 Sint-Genesius-Rode, BelgiumThe present research focused on the analysis of the leakage flows developing from advanced blade tip geometries. The aerodynamic field of a contoured blade tip and of a high-performance rimmed blade were investigated against a baseline squealer rotor. Time-resolved numerical predictions were combined with high-frequency pressure measurements to characterize the tip leakage flow of each tip design. High spatial and temporal resolution measurements provided a detailed representation of the unsteady flow in the near-tip region and at the stage outlet. Numerical computations, based on the nonlinear harmonic method, were employed to assess the unsteady blade row interactions and identify the loss generation mechanisms depending on the tip design. The space- and time-resolved flow field was analysed by modal decomposition to identify the main periodicities of the near-tip and outlet flow and classify the most relevant sources of aerodynamic unsteadiness and entropy generation across the stage.https://www.mdpi.com/2504-186X/4/2/12high pressure turbinesunsteadytip leakageCFDloss generationmodal analysis |
| spellingShingle | Bogdan C. Cernat Sergio Lavagnoli Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis International Journal of Turbomachinery, Propulsion and Power high pressure turbines unsteady tip leakage CFD loss generation modal analysis |
| title | Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis |
| title_full | Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis |
| title_fullStr | Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis |
| title_full_unstemmed | Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis |
| title_short | Characterization of the Unsteady Aerodynamics of Optimized Turbine Blade Tips through Modal Decomposition Analysis |
| title_sort | characterization of the unsteady aerodynamics of optimized turbine blade tips through modal decomposition analysis |
| topic | high pressure turbines unsteady tip leakage CFD loss generation modal analysis |
| url | https://www.mdpi.com/2504-186X/4/2/12 |
| work_keys_str_mv | AT bogdanccernat characterizationoftheunsteadyaerodynamicsofoptimizedturbinebladetipsthroughmodaldecompositionanalysis AT sergiolavagnoli characterizationoftheunsteadyaerodynamicsofoptimizedturbinebladetipsthroughmodaldecompositionanalysis |