超高速飞行器气动外形对电波传播特性的影响

doi:10.3969/j.issn.1001-2400.2018.03.008

Abstract

Abstract:

The plasma sheath surrounding a hypersonic vehicle will have a severe interference on the wireless communication signals and even interrupt the signals, threatening the flight safety. The plasma sheath is closely related to the vehicle's shape which indirectly affects the propagation characteristics of the radio waves. For understanding the influence of different aerodynamic shapes on the wave propagation, the EM wave propagation in the plasma sheath produced by aircraft, including blunt and pointed cone, is investigated. First, the commercial software COMSOL is used to calculate the flow field distribution under different flight conditions, generating the discrete model of plasma sheath. Then, according to the wave propagation theory in the plasma and using the Lagrange and Runge-Kutta methods, ray equations in the plasma sheath are solved numerically, which results in observing some new characteristics of wave propagation, such as waveguide behavior. The results show that, under the same conditions, the interference caused by the blunt vehicle is stronger than that by the pointed vehicle. These results can provide references for the design of hypervelocity aircraft, and further promote the study of related issues.

Key words: characteristics of EM wave propagation, aerodynamic shape, plasma sheath

YANG Xin1,2;WEI Bing1,2;YIN Weike1,2;TAN Chang3. Influence of the aerodynamic shape of a hypersonic vehicle on characteristics of EM wave propagation[J].Journal of Xidian University, 2018, 45(3): 40-44+162.

References

［1］李江挺, 郭立新, 金莎莎, 等. 等离子体鞘套中的电波传播特性研究［J］. 电波科学学报, 2011, 26(3): 494-500.
LI Jiangting, GUO Lixin, JIN Shasha, et al. EM Wave Propagation Characteristic in Plasma Sheath［J］. Chinese Journal of Radio Science, 2011, 26(3): 494-500.
［2］ KEIDAR M, KIM M, BOYD I D. Electromagnetic Reduction of Plasma Density During Atmospheric Reentry and Hypersonic Flights［J］. Journal of Spacecraft and Rockets, 2008, 45(3): 445-453.
［3］ SCHARFMAN W E. The Use of Langmuir Probes to Determine the Electron Density Surrounding Re-entry Vehicles: NASA-CR-66108 ［R］. Washington: NASA, 1965.
［4］ WEAVER W L, BOWEN J T. Entry Trajectory, Entry Environment, and Analysis of Spacecraft Motion for the RAM C-3 Flight Experiment: NASA-TM-X-2562 ［R］. Washington: NASA, 1972.
［5］ PETRIN A B. On the Transmission of Microwaves through Plasma Layer［J］. IEEE Trasactions on Plasma Science, 2000, 28(3): 1000-1008.
［6］ THOMA C, ROSE D V, MILLER C L, et al. Electromagnetic Wave Propagation through an Overdense Magnetized Collisional Plasma Layer［J］. Journal of Applied Physics, 2009, 106(4): 043301.
［7］ KUNDRAPU M, LOVERICH J, BECKWITH K, et al. Modeling Radio Communication Blackout and Blackout Mitigation in Hypersonic Vehicles［J］. Journal of Spacecraft and Rockets, 2015, 52(3): 853-862.
［8］ LIU Z W, BAO W M, LI X P, et al. Influence of Plasma Pressure Fluctuation on RF Wave Propagation［J］. Plasma Science and Technology, 2016, 18(2): 131-137.
［9］ SONG W J, ZHANG H. Analysis of Electromagnetic Wave Propagation and Scattering Characteristics of Plasma Shealth via High Order ADE-ADI FDTD［J］. Journal of Electromagnetic Waves and Applications, 2016, 30(10): 1321-1333.
［10］ MOUSAVI A, ESFANDIARI-KALEJAHI A, AKBARI-MOGHANJOUGHI M. Optical Properties of Nonextensive Inhomogeneous Plasma Sheath［J］. Physics of Plasmas, 2016, 23(7): 073511.
［11］ STARKEY R P. Hypersonic Vehicle Telemetry Blackout Analysis［J］. Journal of Spacecraft and Rockets, 2015, 52(2): 426-438.
［12］田媛, 韩一平, 牛化恒, 等. 弱电离高超声速流场对太赫兹波传播影响［J］. 红外与激光工程, 2015, 44(12): 3690-3695.
TIAN Yuan, HAN Yiping, NIU Huaheng, et al. Effects of Weakly Ionized Hypersonic Flow on Propagation of Terahertz Wave［J］. Infrared and Laser Engineering, 2015, 44(12): 3690-3695.
［13］ PODDAR S, SHARMA D. Blackout Mitigation During Space Vehicle Re-entry［J］. Optik, 2015, 126(24): 5899-5902.
［14］ JONES R M, STEPHENSON J J. A Versatile Three-dimensional Ray Tracing Computer Program for Radio Waves in the Ionosphere: OT Report 75-76 ［R］. Washington: US Department of Commerce, 1975.
［15］王蕊, 郭立新, 杨阁. 等离子体涂层椭球目标的电磁散射［J］. 西安电子科技大学学报, 2008, 35(5): 903-909.
WANG Rui, GUO Lixin, YANG Ge. Investigation on the Electromagnetic Scattering from the Spheroid Covered with the Plasma［J］. Journal of Xidian University, 2008, 35(5): 903-909.
［16］袁忠才, 时家明. 高功率微波与等离子体相互作用理论和数值研究［J］. 物理学报, 2014, 63(9): 095202.
YUAN Zhongcai, SHI Jiaming. Theoretical and Numerical Studies on Interactions Between High-power Microwave and Plasma［J］. Acta Physica Sinica, 2014, 63(9): 095202.
［17］ KINCAID D R, CHENEY E W. Numerical Analysis: Mathematics of Scientific Computing［M］. 3. Pacific Grove, California: Brooks Cole, 2001.
［18］ RYBAK J P. Causes, Effects and Diagnostic Measurements of the Reentry Plasma Sheath: AD-0718428［R］. Fort Collins: Department of Electrical Engineering, Colorado State University, 1970.
［19］ KUNDRAPU M, LOVERICH J, BECKWITH K, et al. Modeling Radio Communication Blackout and Blackout Mitigation in Hypersonic Vehicles［J］. Journal of Spacecraft and Rockets, 2015, 52(3): 853-862.
［20］ LI J T, GUO L X. Research on Electromagnetic Scattering Characteristics of Reentry Vehicles and Blackout Forecast Model［J］. Journal of Electromagnetic Waves and Applications, 2012, 26(13): 1767-1778.

Influence of the aerodynamic shape of a hypersonic vehicle on characteristics of EM wave propagation

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 0

Metrics

Comments

Recommended 10