Echo spectrum modulation characteristics of plasma flow field simulated by wind tunnel

doi:10.7498/aps.71.20211471

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Echo spectrum modulation characteristics of plasma flow field simulated by wind tunnel
	Man Liang 1,3; Deng Hao-Chuan 1,3; Wu Yang 1,3; Yu XL(余西龙)2; Xiao Zhi-He 1,3
刊名	ACTA PHYSICA SINICA
	2022-02-05
卷号	71 期号:3 页码:7
关键词	plasma flow field spectrum modulation one-dimensional range profile wind tunnel
ISSN号	1000-3290
DOI	10.7498/aps.71.20211471
通讯作者	Deng Hao-Chuan(buptriver@163.com)
英文摘要	When the aircraft moves through the atmosphere at a very high speed, the aircraft will experience intense friction with the surrounding atmosphere, which causes the air to be ionized into plasma, thus producing a plasma flow field around it. Plasma is constantly generated on the windward side of the aircraft and flows backwards. The velocity of plasma is different from that of the aircraft. In addition to the dispersion characteristics of the plasma and the non-uniform distribution around the target, the plasma flow field will produce the effects of amplitude, frequency and phase modulation on the incident radar wave, which will change the electromagnetic scattering characteristics of the target. In order to reproduce the non-uniform Doppler phenomenon in the flow field under electromagnetic wave irradiation, the plasma echo spectrum is measured experimentally in the JF-10 wind tunnel of the Institute of Mechanics, the Chinese Academy of Sciences. The echo spectrum data of S band and C band are obtained by using a measurement system composed of signal source, circulator, antenna and spectrometer, and based on the measured data the one-dimensional range profile of the plasma coated target is simulated, and the results show that the plasma flow field has a spectrum modulation effect on the target. When the speed of the flow field cannot be compensated for accurately, the spectral modulation effect will further cause the one-dimensional range profile to defocus, which will affect the ability of radar to detect and track the object. The preliminary analysis shows that the effect is caused mainly by the inhomogeneous velocity distribution of plasma flow field and the sudden change of medium parameters when the shock wave arrives. This experiment can provide data support for verifying the electromagnetic characteristics modeling method of plasma flow field.
分类号	Q4
资助项目	National Natural Science Foundation of China[11927803]
WOS关键词	WAVES
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000762955900025
资助机构	National Natural Science Foundation of China
其他责任者	Deng Hao-Chuan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88721]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Sci & Technol Elect Scattering Lab, Beijing 100854, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 3.China Aerosp Sci & Ind Corp, Acad 2, Beijing 100854, Peoples R China;
推荐引用方式 GB/T 7714	Man Liang,Deng Hao-Chuan,Wu Yang,et al. Echo spectrum modulation characteristics of plasma flow field simulated by wind tunnel[J]. ACTA PHYSICA SINICA,2022,71(3):7.
APA	Man Liang,Deng Hao-Chuan,Wu Yang,余西龙,&Xiao Zhi-He.(2022).Echo spectrum modulation characteristics of plasma flow field simulated by wind tunnel.ACTA PHYSICA SINICA,71(3),7.
MLA	Man Liang,et al."Echo spectrum modulation characteristics of plasma flow field simulated by wind tunnel".ACTA PHYSICA SINICA 71.3(2022):7.