Abstract
Investigation on the pitching moment non-linear characteristics of the high-attitude long-endurance (HALE) diamond joined-wing configuration unmanned aerial vehicle (UAV) was carried out by both numerical simulation and theoretical analysis method. The results show that the aircraft have two obvious pitching moment non-linear regions and there is a pitch-up phenomenon. The turbulent kinetic energy is used to represent the strength and the influence area of flow field structure of the aft-wing changed by the frt-wing wake direct sweep, which explains one of the causes of the non-linear region of the pitch moment. The other reason for the pitching moment non-linear region and pitch-up moment is explained by analyzing the separation characteristics of the aft-wing and the frt-wing. The influence of the general layout parameters of the UAV on the pitching moment characteristics of diamond joined-wing UAV was studied. The results show that adjusting the overall layout parameters can effectively mitigate the impact of pitching moment non-linear characteristics on flight performance.
| Original language | English |
|---|---|
| Pages (from-to) | 1567-1576 |
| Number of pages | 10 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 43 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2017 |
Keywords
- Diamond joined-wing configuration
- High-attitude long-endurance (HALE)
- Layout parameters
- Numerical simulation
- Pitching moment characteristics