无人机着舰流场的数值模拟研究 -- 西北工业大学学报,2019,37(1):186-194
论文:2019,Vol:37,Issue(1):186-194
引用本文:
李旭, 祝小平, 周洲, 许晓平. 无人机着舰流场的数值模拟研究[J]. 西北工业大学学报
LI Xu, ZHU Xiaoping, ZHOU Zhou, XU Xiaoping. The Numerical Simulation of UAV's Landing in Ship Airwake[J]. Northwestern polytechnical university

无人机着舰流场的数值模拟研究
李旭1, 祝小平2, 周洲1,2, 许晓平1,2
1. 西北工业大学 航空学院, 陕西 西安 710072;
2. 西北工业大学 无人机特种技术重点实验室, 陕西 西安 710065
摘要:
针对航母尾迹对舰载机着舰过程气动特性的影响,采用嵌套网格的方法,对无人机在不同风向下的着舰过程进行了数值模拟。首先,对不同网格划分,定常和非定常计算进行了比较,发现有无附面层对航母流场结果影响不大,下滑线上定常计算的结果和非定常时均的结果类似。然后,对0°和±15°风向下的航母流场进行了分析,表明航母尾迹随风向的变化而变化。接着,对单独无人机降落的过程进行了模拟,验证了所建立的嵌套网格的可靠性。最后,对耦合航母情况下无人机的着舰进行了仿真,结果表明降落过程中飞机一直处于低动压的状态,升力和俯仰力矩变化明显,不同风向下着舰气动特性的变化也存在差异。研究结果为以后舰载机安全着舰的评估和控制提供了参考。
关键词:    舰船尾迹    无人机    着舰飞行    数值模拟    嵌套网格    非定常气动力   
The Numerical Simulation of UAV's Landing in Ship Airwake
LI Xu1, ZHU Xiaoping2, ZHOU Zhou1,2, XU Xiaoping1,2
1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Science and Technology on UAV Laboratory, Northwestern Polytechnical University, Xi'an 710065, China
Abstract:
In order to investigate the influence of ship airwake on aerodynamic characteristics of the carrier-based aircraft, UAV's landings in different winds over deck were simulated by Overset Mesh method. Firstly, mesh factors, steady and unsteady methods were compared based on single aircraft carrier. The results showed that the boundary layer mesh around ship didn't show obvious influence for our simulation, and the calculation results between the steady and unsteady time average showed a similar trend. Then, aircraft carrier's flow fields in three wind directions were analyzed, and ship airwake variations with different direction winds over deck were concluded as well. Next, the reliability of Overset Mesh was verified though single UAV's landing simulation. Finally, the coupled flow fields of UAV/ship were studied. The calculation results indicated that aircraft was always in a low dynamic pressure condition, the lift and pitching moment of UAV had apparent changes in landing. Meanwhile, the aerodynamic fluctuations of UAV also revealed differences in different wind directions. The simulation results can be regarded as a reference for the safety assessment of carrier-based aircraft's landing and its control in the future.
Key words:    ship airwake    UAV    carrier landing    numerical simulation    Overset Mesh    unsteady aerodynamics   
收稿日期: 2018-01-11     修回日期:
DOI: 10.1051/jnwpu/20193710186
基金项目: 陕西省重点研发项目(2018ZDCXL-GY-03-04)资助
通讯作者:     Email:
作者简介: 李旭(1993-),西北工业大学博士研究生,主要从事飞行器设计研究。
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