Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil
A smart structure to actuate a morphing trailing edge based on the super critical airfoil NASA sc-0714(2) was designed and verified in a transonic wind tunnel. The pressure distribution over the wing was measured to evaluate the structure ability and effects of trailing edge deflections on the aerod...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/10/7/160 |
| _version_ | 1797527897745915904 |
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| author | Binbin Lv Yuanjing Wang Pengxuan Lei |
| author_facet | Binbin Lv Yuanjing Wang Pengxuan Lei |
| author_sort | Binbin Lv |
| collection | DOAJ |
| description | A smart structure to actuate a morphing trailing edge based on the super critical airfoil NASA sc-0714(2) was designed and verified in a transonic wind tunnel. The pressure distribution over the wing was measured to evaluate the structure ability and effects of trailing edge deflections on the aerodynamic characteristics. In the experiment, Mach number was from 0.4 to 0.8, and the angle of attack was from 0° to 6°. The results showed that the smart structure based on shape memory alloy could carry aerodynamic loads under transonic flow and deflect the trailing edge. When the driving force was constant, deformation would be influenced by the Mach number and angle of attack. Increasing the Mach number weakened the actuation capability of the smart structure, which decreased the deflection angle and rate of the trailing edge. The influence of the angle of attack is more complex, and couples with the influence of the Mach number. The higher the Mach number, the stronger the influence of the angles of attack. Additionally, the trailing edge deflection would dramatically change the flow structure over the airfoil, such as the shock wave position and strength. If separation was caused by the trailing edge deflection, the limitation of the smart structure would be further found. |
| first_indexed | 2024-03-10T09:49:24Z |
| format | Article |
| id | doaj.art-ec0a2a95179446a485ca36c1733bf104 |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-10T09:49:24Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-ec0a2a95179446a485ca36c1733bf1042023-11-22T02:55:58ZengMDPI AGActuators2076-08252021-07-0110716010.3390/act10070160Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical AirfoilBinbin Lv0Yuanjing Wang1Pengxuan Lei2China Aerodynamic Research and Development Center, Mianyang 621000, ChinaChina Aerodynamic Research and Development Center, Mianyang 621000, ChinaChina Aerodynamic Research and Development Center, Mianyang 621000, ChinaA smart structure to actuate a morphing trailing edge based on the super critical airfoil NASA sc-0714(2) was designed and verified in a transonic wind tunnel. The pressure distribution over the wing was measured to evaluate the structure ability and effects of trailing edge deflections on the aerodynamic characteristics. In the experiment, Mach number was from 0.4 to 0.8, and the angle of attack was from 0° to 6°. The results showed that the smart structure based on shape memory alloy could carry aerodynamic loads under transonic flow and deflect the trailing edge. When the driving force was constant, deformation would be influenced by the Mach number and angle of attack. Increasing the Mach number weakened the actuation capability of the smart structure, which decreased the deflection angle and rate of the trailing edge. The influence of the angle of attack is more complex, and couples with the influence of the Mach number. The higher the Mach number, the stronger the influence of the angles of attack. Additionally, the trailing edge deflection would dramatically change the flow structure over the airfoil, such as the shock wave position and strength. If separation was caused by the trailing edge deflection, the limitation of the smart structure would be further found.https://www.mdpi.com/2076-0825/10/7/160morphing trailing edgewing deformation measurementtransonic wind tunnelsmart structureshape memory alloy |
| spellingShingle | Binbin Lv Yuanjing Wang Pengxuan Lei Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil Actuators morphing trailing edge wing deformation measurement transonic wind tunnel smart structure shape memory alloy |
| title | Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil |
| title_full | Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil |
| title_fullStr | Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil |
| title_full_unstemmed | Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil |
| title_short | Effects of Trailing Edge Deflections Driven by Shape Memory Alloy Actuators on the Transonic Aerodynamic Characteristics of a Super Critical Airfoil |
| title_sort | effects of trailing edge deflections driven by shape memory alloy actuators on the transonic aerodynamic characteristics of a super critical airfoil |
| topic | morphing trailing edge wing deformation measurement transonic wind tunnel smart structure shape memory alloy |
| url | https://www.mdpi.com/2076-0825/10/7/160 |
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