Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil
This paper presents the investigation on the phenomenon of a deep dynamic stall at the Reynolds number of the order of 105 over an oscillating NACA 0012 model. Wind tunnel experiments are conducted to investigate the aerodynamic characteristics of the upstroke and downstroke phase associated with th...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2019-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=49105&issue_ID=256 |
| _version_ | 1811293498975977472 |
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| author | D. Surekha R. S. A. Khandelwal R. Rajasekar |
| author_facet | D. Surekha R. S. A. Khandelwal R. Rajasekar |
| author_sort | D. Surekha R. S. |
| collection | DOAJ |
| description | This paper presents the investigation on the phenomenon of a deep dynamic stall at the Reynolds number of the order of 105 over an oscillating NACA 0012 model. Wind tunnel experiments are conducted to investigate the aerodynamic characteristics of the upstroke and downstroke phase associated with the sinusoidal pitching motion of the airfoil using the technique of surface pressure measurements and Particle Image Velocimetry. The validation of the lift curve slope of upstroke and downstroke with the Prandtl’s thin airfoil theory reveals the fact of massive flow separation during the deep dynamic stall regime. Numerical simulations are performed using Reynolds averaged Navier Stokes turbulence models such as RNG K-є and SST models. The data obtained from these models have been compared with the experimental data to investigate the aerodynamic features of the deep dynamic stall regime. The comparison shows that the URANS with K-ε model is in good agreement with the experimental data within the reasonable regime. |
| first_indexed | 2024-04-13T05:02:18Z |
| format | Article |
| id | doaj.art-1ae89559e7144b1cb5fb20489a5a289e |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-04-13T05:02:18Z |
| publishDate | 2019-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-1ae89559e7144b1cb5fb20489a5a289e2022-12-22T03:01:17ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722019-01-01123857863.Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 AirfoilD. Surekha R. S.0A. Khandelwal1R. Rajasekar2Rajalakshmi Engineering College, Chennai, TamilNadu, IndiaDepartment of Aerospace Engineering, IIT Kanpur, Kanpur, Uttar Pradesh, IndiaExcel Engineering College, TamilNadu, IndiaThis paper presents the investigation on the phenomenon of a deep dynamic stall at the Reynolds number of the order of 105 over an oscillating NACA 0012 model. Wind tunnel experiments are conducted to investigate the aerodynamic characteristics of the upstroke and downstroke phase associated with the sinusoidal pitching motion of the airfoil using the technique of surface pressure measurements and Particle Image Velocimetry. The validation of the lift curve slope of upstroke and downstroke with the Prandtl’s thin airfoil theory reveals the fact of massive flow separation during the deep dynamic stall regime. Numerical simulations are performed using Reynolds averaged Navier Stokes turbulence models such as RNG K-є and SST models. The data obtained from these models have been compared with the experimental data to investigate the aerodynamic features of the deep dynamic stall regime. The comparison shows that the URANS with K-ε model is in good agreement with the experimental data within the reasonable regime.http://jafmonline.net/JournalArchive/download?file_ID=49105&issue_ID=256Sinusoidal oscillation; Unsteady flow; Pitching airfoil; Numerical simulation. |
| spellingShingle | D. Surekha R. S. A. Khandelwal R. Rajasekar Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil Journal of Applied Fluid Mechanics Sinusoidal oscillation; Unsteady flow; Pitching airfoil; Numerical simulation. |
| title | Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil |
| title_full | Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil |
| title_fullStr | Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil |
| title_full_unstemmed | Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil |
| title_short | Investigation of Flow Field in Deep Dynamic Stall over an Oscillating NACA 0012 Airfoil |
| title_sort | investigation of flow field in deep dynamic stall over an oscillating naca 0012 airfoil |
| topic | Sinusoidal oscillation; Unsteady flow; Pitching airfoil; Numerical simulation. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=49105&issue_ID=256 |
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