Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows
Frequent flight conflicts will be observed as the number of aircrafts increases, and such conflicts will cause unprecedented challenges in flight safety; thus, the flight characteristics of small aircrafts under the wake flow of a large airliner should be thoroughly analyzed. Combined with the slidi...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Advanced Transportation |
| Online Access: | http://dx.doi.org/10.1155/2019/6326794 |
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| author | Bai-gang Mi Hao Zhan |
| author_facet | Bai-gang Mi Hao Zhan |
| author_sort | Bai-gang Mi |
| collection | DOAJ |
| description | Frequent flight conflicts will be observed as the number of aircrafts increases, and such conflicts will cause unprecedented challenges in flight safety; thus, the flight characteristics of small aircrafts under the wake flow of a large airliner should be thoroughly analyzed. Combined with the sliding mesh technique, a computational fluid dynamics (CFD) method is proposed in this paper to simulate three wake flow patterns, i.e., wingtip vortex, jet flow, and propeller slipstream, and then, the static and dynamic derivatives that represent the stability of the fly wing under the wake flow are identified by using the least squares method. The results demonstrate that both the steady and unsteady aerodynamics of the fly wing are affected by wake flows: wingtip vortices increase the lift-to-drag ratio and considerably change the dynamic damping; jet flow reduces both the static and dynamic damping; and propeller slipstream leads to slow variations in the dynamic damping and decreases in the lift-to-drag ratio. |
| format | Article |
| id | doaj-art-53d41316eb80431fbec388db20fd5c55 |
| institution | Kabale University |
| issn | 0197-6729 2042-3195 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Advanced Transportation |
| spelling | doaj-art-53d41316eb80431fbec388db20fd5c552025-02-03T01:30:37ZengWileyJournal of Advanced Transportation0197-67292042-31952019-01-01201910.1155/2019/63267946326794Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake FlowsBai-gang Mi0Hao Zhan1School of Aerospace Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, ChinaFrequent flight conflicts will be observed as the number of aircrafts increases, and such conflicts will cause unprecedented challenges in flight safety; thus, the flight characteristics of small aircrafts under the wake flow of a large airliner should be thoroughly analyzed. Combined with the sliding mesh technique, a computational fluid dynamics (CFD) method is proposed in this paper to simulate three wake flow patterns, i.e., wingtip vortex, jet flow, and propeller slipstream, and then, the static and dynamic derivatives that represent the stability of the fly wing under the wake flow are identified by using the least squares method. The results demonstrate that both the steady and unsteady aerodynamics of the fly wing are affected by wake flows: wingtip vortices increase the lift-to-drag ratio and considerably change the dynamic damping; jet flow reduces both the static and dynamic damping; and propeller slipstream leads to slow variations in the dynamic damping and decreases in the lift-to-drag ratio.http://dx.doi.org/10.1155/2019/6326794 |
| spellingShingle | Bai-gang Mi Hao Zhan Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows Journal of Advanced Transportation |
| title | Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows |
| title_full | Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows |
| title_fullStr | Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows |
| title_full_unstemmed | Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows |
| title_short | Numerical Simulation of the Static and Dynamic Aerodynamics of a UAV under Wake Flows |
| title_sort | numerical simulation of the static and dynamic aerodynamics of a uav under wake flows |
| url | http://dx.doi.org/10.1155/2019/6326794 |
| work_keys_str_mv | AT baigangmi numericalsimulationofthestaticanddynamicaerodynamicsofauavunderwakeflows AT haozhan numericalsimulationofthestaticanddynamicaerodynamicsofauavunderwakeflows |