Influence of a Deflectable Leading-Edge on a Flapping Airfoil
Flapping wing dynamics are of great interest in many research areas, such as bioinspired systems and aircraft aeroelasticity. The findings of the present study provide significant insight into the importance of the leading-edge dynamic incidence on the propulsive performance of flapping airfoils. Th...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
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| Series: | Aerospace |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2226-4310/10/7/615 |
| _version_ | 1797590737272963072 |
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| author | Emanuel A. R. Camacho Flávio D. Marques André R. R. Silva |
| author_facet | Emanuel A. R. Camacho Flávio D. Marques André R. R. Silva |
| author_sort | Emanuel A. R. Camacho |
| collection | DOAJ |
| description | Flapping wing dynamics are of great interest in many research areas, such as bioinspired systems and aircraft aeroelasticity. The findings of the present study provide significant insight into the importance of the leading-edge dynamic incidence on the propulsive performance of flapping airfoils. The main objective is to improve the propulsive characteristics by adding a pitching leading-edge to a conventional NACA0012 airfoil at the lower spectrum of the Reynolds number. The problem is solved numerically at a Reynolds number of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>4</mn></msup></semantics></math></inline-formula> under various flapping conditions. The results show that the leading-edge pitching amplitude has a great impact on the propulsive power and efficiency, providing meaningful improvements. The required power coefficient is reduced overall, although not as significantly as the propulsive power. The influence of the movable leading-edge on the pressure distribution is analyzed, showing that the enlargement of the frontal area is the root cause of propulsive augmentation. The proposed geometry provides an innovative way of flapping an airfoil with propulsive purposes, offering remarkable improvements that can defy conventional flapping. |
| first_indexed | 2024-03-11T01:24:44Z |
| format | Article |
| id | doaj.art-ae8f85a818024a25a8f4f1fd80d4d985 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-11T01:24:44Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-ae8f85a818024a25a8f4f1fd80d4d9852023-11-18T17:50:48ZengMDPI AGAerospace2226-43102023-07-0110761510.3390/aerospace10070615Influence of a Deflectable Leading-Edge on a Flapping AirfoilEmanuel A. R. Camacho0Flávio D. Marques1André R. R. Silva2Departamento de Ciências Aeroespaciais, Universidade da Beira Interior, 6201-001 Covilhã, PortugalDepartment of Mechanical Engineering, Engineering School of São Carlos, University of São Paulo, São Paulo 13566-590, BrazilDepartamento de Ciências Aeroespaciais, Universidade da Beira Interior, 6201-001 Covilhã, PortugalFlapping wing dynamics are of great interest in many research areas, such as bioinspired systems and aircraft aeroelasticity. The findings of the present study provide significant insight into the importance of the leading-edge dynamic incidence on the propulsive performance of flapping airfoils. The main objective is to improve the propulsive characteristics by adding a pitching leading-edge to a conventional NACA0012 airfoil at the lower spectrum of the Reynolds number. The problem is solved numerically at a Reynolds number of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>4</mn></msup></semantics></math></inline-formula> under various flapping conditions. The results show that the leading-edge pitching amplitude has a great impact on the propulsive power and efficiency, providing meaningful improvements. The required power coefficient is reduced overall, although not as significantly as the propulsive power. The influence of the movable leading-edge on the pressure distribution is analyzed, showing that the enlargement of the frontal area is the root cause of propulsive augmentation. The proposed geometry provides an innovative way of flapping an airfoil with propulsive purposes, offering remarkable improvements that can defy conventional flapping.https://www.mdpi.com/2226-4310/10/7/615flapping airfoilpropulsive enhancementflow controlmovable leading-edge |
| spellingShingle | Emanuel A. R. Camacho Flávio D. Marques André R. R. Silva Influence of a Deflectable Leading-Edge on a Flapping Airfoil Aerospace flapping airfoil propulsive enhancement flow control movable leading-edge |
| title | Influence of a Deflectable Leading-Edge on a Flapping Airfoil |
| title_full | Influence of a Deflectable Leading-Edge on a Flapping Airfoil |
| title_fullStr | Influence of a Deflectable Leading-Edge on a Flapping Airfoil |
| title_full_unstemmed | Influence of a Deflectable Leading-Edge on a Flapping Airfoil |
| title_short | Influence of a Deflectable Leading-Edge on a Flapping Airfoil |
| title_sort | influence of a deflectable leading edge on a flapping airfoil |
| topic | flapping airfoil propulsive enhancement flow control movable leading-edge |
| url | https://www.mdpi.com/2226-4310/10/7/615 |
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