New Hydrodynamic Ejection Dynamic Characteristics of Unmanned Aerial Vehicles

doi:10.3969/j.issn.1000-1093.2021.01.017

CORC > 兰州理工大学 > 兰州理工大学

	New Hydrodynamic Ejection Dynamic Characteristics of Unmanned Aerial Vehicles
	Zhang, Zhenhua 1; Wu, Xiangyang 1; Li, Chunping 1; Zhang, Jizhi 2; Wei, Liejiang 2; Wang, Fei 1
刊名	Binggong Xuebao/Acta Armamentarii
	2021
卷号	42 期号:1 页码:151-158
关键词	Antennas Ejectors (pumps) Equations of state Hydrodynamics Speed Unmanned aerial vehicles (UAV) Air chamber pressures Complicated structures Dynamic characteristics Energy and momentum equations Exponential curves Force balance equation High-pressure water jets Inflation pressures
ISSN号	10001093
DOI	10.3969/j.issn.1000-1093.2021.01.017
英文摘要	For the complicated structure and limited power of pneumatic ejection of active unmanned aerial vehicles(UAV), a hydrodynamic ejection scheme is proposed, in which the reverse thrust generated by high-pressure water jets as power is used to take off the VAU quickly.A non-linear ejection dynamics model is established, which couples the air chamber state equation and water chamber momentum equation of ejector, the energy and momentum equations of jet, and the force balance equation of catapult load. The variations of ejection speed and displacement, spurt speed and reverse thrust, ejector air chamber pressure, and the influences of ejector diameter, jet diameter and inflation pressure on catapult performance are numerically analyzed. The results show that, as the catapult time increases, the catapult speed and displacement increase approximately in a logarithmic curve and an exponential curve, respectively, and the ejection speed, the reverse thrust of jet and the air chamber pressure decrease significantly in a parabolic state. When the ejector diameter is 200 mm, the ejector length is 2 400 mm, the jet diameter is 20 mm, and the inflation pressure is 31.5 MPa, the 150 kg UAV can be accelerated to 25.02 m/s in the range of 16.62 m. Increasing ejector diameter adversely affects ejection performance.The increase in jet diameter has little effect on the maximum ejection speed, but it significantly shortens the catapult time and distance, and increases the catapult overload.Under the premise of catapult overloaded, an appropriate increase in inflation pressure can reduce catapult time and distance, and help to increase catapult speed. © 2021, Editorial Board of Acta Armamentarii. All right reserved.
语种	中文
出版者	China Ordnance Industry Corporation
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150940]
专题	兰州理工大学
作者单位	1.Beijing Research Institute of Special Mechanic, Beijing; 100143, China; 2.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Zhenhua,Wu, Xiangyang,Li, Chunping,et al. New Hydrodynamic Ejection Dynamic Characteristics of Unmanned Aerial Vehicles[J]. Binggong Xuebao/Acta Armamentarii,2021,42(1):151-158.
APA	Zhang, Zhenhua,Wu, Xiangyang,Li, Chunping,Zhang, Jizhi,Wei, Liejiang,&Wang, Fei.(2021).New Hydrodynamic Ejection Dynamic Characteristics of Unmanned Aerial Vehicles.Binggong Xuebao/Acta Armamentarii,42(1),151-158.
MLA	Zhang, Zhenhua,et al."New Hydrodynamic Ejection Dynamic Characteristics of Unmanned Aerial Vehicles".Binggong Xuebao/Acta Armamentarii 42.1(2021):151-158.