Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays
In this study, an experimental investigation is performed on a scaled, all-movable horizontal tail to study the aeroelastic behaviors induced by multiple free-plays. The dynamic response in wind tunnel tests is measured by strain gauges, an accelerometer, and a binocular vision measurement system. T...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/10/5/434 |
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| author | Xinyu Ai Yuguang Bai Wei Qian Yuhai Li Xiangyan Chen |
| author_facet | Xinyu Ai Yuguang Bai Wei Qian Yuhai Li Xiangyan Chen |
| author_sort | Xinyu Ai |
| collection | DOAJ |
| description | In this study, an experimental investigation is performed on a scaled, all-movable horizontal tail to study the aeroelastic behaviors induced by multiple free-plays. The dynamic response in wind tunnel tests is measured by strain gauges, an accelerometer, and a binocular vision measurement system. The obtained results indicate that the present aeroelastic system exhibits highly nonlinear characteristics and undergoes two independent limit cycle oscillations (LCOs) induced by bending free-play and torsion free-play, respectively. Further, various parametric studies are conducted to evaluate the effects of the free-play angles, angle of attack, flow velocity, and gust excitation on the LCOs. It is found that the value of free-play angle has no significant effect on the critical flow velocity which leads to the occurrence of LCOs. The amplitude and frequency of LCOs increase with the increasing free-play angle and flow velocity. Moreover, the horizontal tail experiences high-order harmonic resonances when LCOs appear. Finally, the stability of limit cycles is analyzed based on the gust excitation experiment. Overall, compared to an all-movable horizontal tail with single free-play, the multiple free-plays system exhibits more complex dynamic behaviors. In this paper, the measured results of the scaled model, which has a similar mass distribution and stiffness distribution as actual aircraft, may be valuable for predicting such LCOs induced by multiple free-plays, and providing a reference for the design of all-movable horizontal tail to prevent LCOs. |
| first_indexed | 2024-03-11T04:02:44Z |
| format | Article |
| id | doaj.art-7980deb984e948d3bc54f96fd3b76b31 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-11T04:02:44Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-7980deb984e948d3bc54f96fd3b76b312023-11-18T00:00:11ZengMDPI AGAerospace2226-43102023-05-0110543410.3390/aerospace10050434Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-PlaysXinyu Ai0Yuguang Bai1Wei Qian2Yuhai Li3Xiangyan Chen4School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116023, ChinaSchool of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116023, ChinaSchool of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116023, ChinaSchool of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116023, ChinaBeijing Institute of Astronautical Systems Engineering, Beijing 100076, ChinaIn this study, an experimental investigation is performed on a scaled, all-movable horizontal tail to study the aeroelastic behaviors induced by multiple free-plays. The dynamic response in wind tunnel tests is measured by strain gauges, an accelerometer, and a binocular vision measurement system. The obtained results indicate that the present aeroelastic system exhibits highly nonlinear characteristics and undergoes two independent limit cycle oscillations (LCOs) induced by bending free-play and torsion free-play, respectively. Further, various parametric studies are conducted to evaluate the effects of the free-play angles, angle of attack, flow velocity, and gust excitation on the LCOs. It is found that the value of free-play angle has no significant effect on the critical flow velocity which leads to the occurrence of LCOs. The amplitude and frequency of LCOs increase with the increasing free-play angle and flow velocity. Moreover, the horizontal tail experiences high-order harmonic resonances when LCOs appear. Finally, the stability of limit cycles is analyzed based on the gust excitation experiment. Overall, compared to an all-movable horizontal tail with single free-play, the multiple free-plays system exhibits more complex dynamic behaviors. In this paper, the measured results of the scaled model, which has a similar mass distribution and stiffness distribution as actual aircraft, may be valuable for predicting such LCOs induced by multiple free-plays, and providing a reference for the design of all-movable horizontal tail to prevent LCOs.https://www.mdpi.com/2226-4310/10/5/434multiple free-playsaeroelasticityall-movable horizontal taillimit cycle oscillationwind tunnel test |
| spellingShingle | Xinyu Ai Yuguang Bai Wei Qian Yuhai Li Xiangyan Chen Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays Aerospace multiple free-plays aeroelasticity all-movable horizontal tail limit cycle oscillation wind tunnel test |
| title | Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays |
| title_full | Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays |
| title_fullStr | Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays |
| title_full_unstemmed | Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays |
| title_short | Experimental Aeroelastic Investigation of an All-Movable Horizontal Tail Model with Bending and Torsion Free-Plays |
| title_sort | experimental aeroelastic investigation of an all movable horizontal tail model with bending and torsion free plays |
| topic | multiple free-plays aeroelasticity all-movable horizontal tail limit cycle oscillation wind tunnel test |
| url | https://www.mdpi.com/2226-4310/10/5/434 |
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