Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil
The main objective of this study is to estimate the dynamic loads acting over a glaze-iced airfoil. This work studies the performance of unsteady Reynolds-averaged Navier-Stokes (URANS) simulations in predicting the oscillations over an iced airfoil. The structure and size of time-averaged vortices...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2018/2981739 |
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| author | Narges Tabatabaei Michel J. Cervantes Chirag Trivedi |
| author_facet | Narges Tabatabaei Michel J. Cervantes Chirag Trivedi |
| author_sort | Narges Tabatabaei |
| collection | DOAJ |
| description | The main objective of this study is to estimate the dynamic loads acting over a glaze-iced airfoil. This work studies the performance of unsteady Reynolds-averaged Navier-Stokes (URANS) simulations in predicting the oscillations over an iced airfoil. The structure and size of time-averaged vortices are compared to measurements. Furthermore, the accuracy of a two-equation eddy viscosity turbulence model, the shear stress transport (SST) model, is investigated in the case of the dynamic load analysis over a glaze-iced airfoil. The computational fluid dynamic analysis was conducted to investigate the effect of critical ice accretions on a 0.610 m chord NACA 0011 airfoil. Leading edge glaze ice accretion was simulated with flat plates (spoiler-ice) extending along the span of the blade. Aerodynamic performance coefficients and pressure profiles were calculated and validated for the Reynolds number of 1.83 × 106. Furthermore, turbulent separation bubbles were studied. The numerical results confirm both time-dependent phenomena observed in previous similar measurements: (1) low-frequency mode, with a Strouhal number Sth≈0,013–0.02, and (2) higher frequency mode with a Strouhal number StL≈0,059–0.69. The higher frequency motion has the same characteristics as the shedding mode and the lower frequency motion has the flapping mode characteristics. |
| format | Article |
| id | doaj-art-5fad73c37154438590586674e207a12e |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-5fad73c37154438590586674e207a12e2025-02-03T01:31:23ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342018-01-01201810.1155/2018/29817392981739Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an AirfoilNarges Tabatabaei0Michel J. Cervantes1Chirag Trivedi2University of Technology, Luleå, SwedenUniversity of Technology, Luleå, SwedenDepartment of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, NorwayThe main objective of this study is to estimate the dynamic loads acting over a glaze-iced airfoil. This work studies the performance of unsteady Reynolds-averaged Navier-Stokes (URANS) simulations in predicting the oscillations over an iced airfoil. The structure and size of time-averaged vortices are compared to measurements. Furthermore, the accuracy of a two-equation eddy viscosity turbulence model, the shear stress transport (SST) model, is investigated in the case of the dynamic load analysis over a glaze-iced airfoil. The computational fluid dynamic analysis was conducted to investigate the effect of critical ice accretions on a 0.610 m chord NACA 0011 airfoil. Leading edge glaze ice accretion was simulated with flat plates (spoiler-ice) extending along the span of the blade. Aerodynamic performance coefficients and pressure profiles were calculated and validated for the Reynolds number of 1.83 × 106. Furthermore, turbulent separation bubbles were studied. The numerical results confirm both time-dependent phenomena observed in previous similar measurements: (1) low-frequency mode, with a Strouhal number Sth≈0,013–0.02, and (2) higher frequency mode with a Strouhal number StL≈0,059–0.69. The higher frequency motion has the same characteristics as the shedding mode and the lower frequency motion has the flapping mode characteristics.http://dx.doi.org/10.1155/2018/2981739 |
| spellingShingle | Narges Tabatabaei Michel J. Cervantes Chirag Trivedi Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil International Journal of Rotating Machinery |
| title | Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil |
| title_full | Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil |
| title_fullStr | Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil |
| title_full_unstemmed | Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil |
| title_short | Time-Dependent Effects of Glaze Ice on the Aerodynamic Characteristics of an Airfoil |
| title_sort | time dependent effects of glaze ice on the aerodynamic characteristics of an airfoil |
| url | http://dx.doi.org/10.1155/2018/2981739 |
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