Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets
To provide sufficient lift during takeoff and landing, large aircraft are equipped with complicated high-lift devices. The use of simple flaps coupled with active flow control (AFC) can achieve lift improvement while reducing mechanical structure and weight. The present study focuses on verifying th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/18/10166 |
| _version_ | 1797581432609046528 |
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| author | Shuai Luo Linkai Li Keming Cheng Yunsong Gu Ruishan Fang Wanbo Wang |
| author_facet | Shuai Luo Linkai Li Keming Cheng Yunsong Gu Ruishan Fang Wanbo Wang |
| author_sort | Shuai Luo |
| collection | DOAJ |
| description | To provide sufficient lift during takeoff and landing, large aircraft are equipped with complicated high-lift devices. The use of simple flaps coupled with active flow control (AFC) can achieve lift improvement while reducing mechanical structure and weight. The present study focuses on verifying the feasibility and effectiveness of simple flaps combined with sweeping jet flow control. An experimental study on the AFC of flaps, using sweeping jets, was carried out using a NASA SC(2)-0410 supercritical airfoil wind-tunnel model at <i>Re</i> = 2.0 × 10<sup>5</sup> (with velocity <i>V</i> = 10 m/s). In the experiment, the wing angle of attack (<i>α</i>) ranged from 3 to 18°, and the flap deflection angle (<i>δ</i>) ranged from 0 to 30°; the aerodynamic characteristics and surface pressure characteristics of the wing at typical working conditions were analyzed. Using sweeping jets to control the flow on the flaps, the momentum coefficients (for three actuator groups) of the jet are 0.8%, 3.6%, and 8.2%, respectively, and the maximum lift coefficient was increased by approximately 33%. The influence of the sweeping jet flow rate on the aerodynamic performance of the airfoil is analyzed. There are two main reasons for the lift coefficient increase caused by sweeping jet flow: an extra suction peak near the flap and a suction peak increase near the leading edge area caused by induced flow. |
| first_indexed | 2024-03-10T23:04:52Z |
| format | Article |
| id | doaj.art-56c14e82b84c48dda7f2e6f0fa1e2296 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T23:04:52Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-56c14e82b84c48dda7f2e6f0fa1e22962023-11-19T09:23:55ZengMDPI AGApplied Sciences2076-34172023-09-0113181016610.3390/app131810166Active Flow Control of a Supercritical Airfoil and Flap with Sweeping JetsShuai Luo0Linkai Li1Keming Cheng2Yunsong Gu3Ruishan Fang4Wanbo Wang5College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaLow Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, ChinaTo provide sufficient lift during takeoff and landing, large aircraft are equipped with complicated high-lift devices. The use of simple flaps coupled with active flow control (AFC) can achieve lift improvement while reducing mechanical structure and weight. The present study focuses on verifying the feasibility and effectiveness of simple flaps combined with sweeping jet flow control. An experimental study on the AFC of flaps, using sweeping jets, was carried out using a NASA SC(2)-0410 supercritical airfoil wind-tunnel model at <i>Re</i> = 2.0 × 10<sup>5</sup> (with velocity <i>V</i> = 10 m/s). In the experiment, the wing angle of attack (<i>α</i>) ranged from 3 to 18°, and the flap deflection angle (<i>δ</i>) ranged from 0 to 30°; the aerodynamic characteristics and surface pressure characteristics of the wing at typical working conditions were analyzed. Using sweeping jets to control the flow on the flaps, the momentum coefficients (for three actuator groups) of the jet are 0.8%, 3.6%, and 8.2%, respectively, and the maximum lift coefficient was increased by approximately 33%. The influence of the sweeping jet flow rate on the aerodynamic performance of the airfoil is analyzed. There are two main reasons for the lift coefficient increase caused by sweeping jet flow: an extra suction peak near the flap and a suction peak increase near the leading edge area caused by induced flow.https://www.mdpi.com/2076-3417/13/18/10166active flow controlflap deflectionflow separationsweeping jet |
| spellingShingle | Shuai Luo Linkai Li Keming Cheng Yunsong Gu Ruishan Fang Wanbo Wang Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets Applied Sciences active flow control flap deflection flow separation sweeping jet |
| title | Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets |
| title_full | Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets |
| title_fullStr | Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets |
| title_full_unstemmed | Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets |
| title_short | Active Flow Control of a Supercritical Airfoil and Flap with Sweeping Jets |
| title_sort | active flow control of a supercritical airfoil and flap with sweeping jets |
| topic | active flow control flap deflection flow separation sweeping jet |
| url | https://www.mdpi.com/2076-3417/13/18/10166 |
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