Mean flow characteristics of two-dimensional wings in ground effect
The present study numerically investigates the aerodynamic characteristics of two-dimensional wings in the vicinity of the ground by solving two-dimensional steady incompressible Navier-Stokes equations with the turbulence closure model of the realizable k-ε model. Numerical simulations are performe...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2012-06-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2092678216301972 |
| _version_ | 1819075094720282624 |
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| author | Jae Hwan Jung Hyun Sik Yoon Ho Hwan Chun Pham Anh Hung Osama Ahmed Elsamni |
| author_facet | Jae Hwan Jung Hyun Sik Yoon Ho Hwan Chun Pham Anh Hung Osama Ahmed Elsamni |
| author_sort | Jae Hwan Jung |
| collection | DOAJ |
| description | The present study numerically investigates the aerodynamic characteristics of two-dimensional wings in the vicinity of the ground by solving two-dimensional steady incompressible Navier-Stokes equations with the turbulence closure model of the realizable k-ε model. Numerical simulations are performed at a wide range of the normalized ground clearance by the chord length (0.1≤h/C ≤ 1.25) for the angles of attack (0° ≤ α ≤ 10°) in the pre-stall regime at a Reynolds number (Re) of 2×106 based on free stream velocity U∞ and the chord length. As the physical model of this study, a cambered airfoil of NACA 4406 has been selected by a performance test for various airfoils. The maximum lift-to-drag ratio is achieved at α = 4° and h/C = 0.1. Under the conditions of α = 4° and h/C = 0.1, the effect of the Reynolds number on the aerodynamic characteristics of NACA 4406 is investigated in the range of 2× 10 5 ≤ Re ≤ 2× 109. As Re increases, Cl and Cd augments and decreases, respectively, and the lift-to-drag ratio increases linearly. |
| first_indexed | 2024-12-21T18:19:57Z |
| format | Article |
| id | doaj.art-9f271a70d49f47b58397d1e7b73dfead |
| institution | Directory Open Access Journal |
| issn | 2092-6782 |
| language | English |
| last_indexed | 2024-12-21T18:19:57Z |
| publishDate | 2012-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj.art-9f271a70d49f47b58397d1e7b73dfead2022-12-21T18:54:35ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822012-06-014215116110.2478/IJNAOE-2013-0086Mean flow characteristics of two-dimensional wings in ground effectJae Hwan Jung0Hyun Sik Yoon1Ho Hwan Chun2Pham Anh Hung3Osama Ahmed Elsamni4Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan, KoreaGlobal Core Research Center for Ships and Offshore Plants, Pusan National University, Busan, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, Busan, KoreaDepartment of Naval Architecture and Ocean Engineering, Pusan National University, Busan, KoreaCountry Department of Mechanical Power Engineering, The University of Alexandra. El-Chatby Alexandra, EgyptThe present study numerically investigates the aerodynamic characteristics of two-dimensional wings in the vicinity of the ground by solving two-dimensional steady incompressible Navier-Stokes equations with the turbulence closure model of the realizable k-ε model. Numerical simulations are performed at a wide range of the normalized ground clearance by the chord length (0.1≤h/C ≤ 1.25) for the angles of attack (0° ≤ α ≤ 10°) in the pre-stall regime at a Reynolds number (Re) of 2×106 based on free stream velocity U∞ and the chord length. As the physical model of this study, a cambered airfoil of NACA 4406 has been selected by a performance test for various airfoils. The maximum lift-to-drag ratio is achieved at α = 4° and h/C = 0.1. Under the conditions of α = 4° and h/C = 0.1, the effect of the Reynolds number on the aerodynamic characteristics of NACA 4406 is investigated in the range of 2× 10 5 ≤ Re ≤ 2× 109. As Re increases, Cl and Cd augments and decreases, respectively, and the lift-to-drag ratio increases linearly.http://www.sciencedirect.com/science/article/pii/S2092678216301972WingGround effectGround clearancesDragLiftReynolds number effect |
| spellingShingle | Jae Hwan Jung Hyun Sik Yoon Ho Hwan Chun Pham Anh Hung Osama Ahmed Elsamni Mean flow characteristics of two-dimensional wings in ground effect International Journal of Naval Architecture and Ocean Engineering Wing Ground effect Ground clearances Drag Lift Reynolds number effect |
| title | Mean flow characteristics of two-dimensional wings in ground effect |
| title_full | Mean flow characteristics of two-dimensional wings in ground effect |
| title_fullStr | Mean flow characteristics of two-dimensional wings in ground effect |
| title_full_unstemmed | Mean flow characteristics of two-dimensional wings in ground effect |
| title_short | Mean flow characteristics of two-dimensional wings in ground effect |
| title_sort | mean flow characteristics of two dimensional wings in ground effect |
| topic | Wing Ground effect Ground clearances Drag Lift Reynolds number effect |
| url | http://www.sciencedirect.com/science/article/pii/S2092678216301972 |
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