不同喷口修形的二元收敛喷管RCS数值模拟

陈立海; 杨青真; 陈玲玲; 崔金辉

不同喷口修形的二元收敛喷管RCS数值模拟

西北工业大学动力与能源学院, 西安 710072

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出版历程
- 收稿日期: 2011-04-13
- 修回日期: 2011-11-12
- 刊出日期: 2012-03-28

Numerical smulation of RCS for 2-D convergent nozzle with different trailing edges

School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China

摘要

摘要: 用等效棱边电磁流(EEC)方法和物理光学迭代(IPO)法自主开发了计算程序,用来分析不同尾缘修形喷管的雷达散射特性;在计算中考虑喷管出口边缘的绕射场对雷达散射截面(RCS)的影响;提出了一种高效的判断面元间遮挡关系的算法和喷管出口轮廓线的辨别方法;在此基础上,研究了四种不同喷口修形的二元收敛喷管的RCS特性.结果表明:该开发程序具有较好的计算精度;适当的喷口修形可降低重点姿态角下喷管的RCS.
- 二元喷管 /
- 雷达散射截面 (RCS) /
- 物理光学迭代 (IPO) 法 /
- 等效棱边电磁流 (EEC) 方法 /
- 射线追踪法
Abstract: Combining iterative physical optic (IPO) approach with equivalent edge currents (EEC) method,a program which could calculate the edge diffraction field was developed to simulate the radar scattering characteristics of nozzles with different trailing edges.An efficient algorithm to judge the occlusion relationship between face elements and a method to judge the contour line of trailing edges were proposed.On this basis,RCS (radar cross section) characteristics of the two-dimensional (2-D) convergent nozzles with four kinds of trailing edges were investigated.The results show that the program developed is reliable and the appropriate contour line modification of trailing edge can decrease the RCS of the nozzle in primary attitude angles.
- two-dimensional(2-D) nozzle /
- radar cross section(RCS) /
- iterative physical optic(IPO) approach /
- equivalent edge currents(EEC) method /
- ray-tracing method

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参考文献(13)

[1]	阮颖铮.雷达截面与隐身技术[M].北京:国防工业出版社,1998.
[2]	Lozanora M,Stantor P.Experimental investigation on the similarity of a 3D rectangular turbulent jet[J].Experiments in Fluid,1998,24(5-6):470-478.
[3]	罗威.三维电大复杂腔体电磁散射问题的混合快速算法研究.西安:西安电子科技大学,2007. LUO Wei.Investigations of the fast hybrid methods for scattering characteristics of three-dimensional electrically large complex cavity.Xi’an:Xidian University,2007.(in Chinese)
[4]	顾长青,舒永泽,徐金平.物理光学迭代法的子域连接法[J].电子学报,2001,29(3):420-422. GU Changqing,SHU Yongze,XU Jinping.A sub domains splicing technique for IPO approach[J].Acta Electronica Sinica,2001,29(3):420-422.(in Chinese)
[5]	车竞,唐硕.高超声速飞行器雷达散射界面分析[J].宇航学报,2007,28(1):227-232. CHE Jing,TANG Shuo.RCS analysis of hypersonic cruise vehicle[J].Journal of Astronautics,2007,28(1):227-232.(in Chinese)
[6]	Michaeli A.Elimination of infinites in equivalent edge currents,Part Ⅰ:fringe current components[J].IEEE Trans,1986,34(7):912-918.
[7]	王憬.IPO-FDTD混合法计算三维复杂腔体的RCS.南京:南京航空航天大学,2002. WANG Jing.The hybrid IPO-FDTD method for the three dimension complex cavities.Nanjing:Nanjing University of Aeronautics and Astronautics,2002.(in Chinese)
[8]	许小艳,龚书喜.计算开口腔体RCS的前后向物理光学迭代法[J].空间电子技术.2008,1(1):72-76. XU Xiaoyan,GONG Shuxi.The forward-backward IPO algorithm for calculating open-ended cavities[J].Space Electronic Technology,2008,1(1):72-76.(in Chinese)
[9]	闫玉波,葛德彪,聂小春,等.应用改进迭代物理光学方法分析电大尺寸开口腔体散射[J].微波学报,2001,17(1):35-39. YAN Yubo,GE Debiao,NIE Xiaochun,et al.An improved IPO method applied to the analysis of EM scattering from a large open-ended cavity[J].Journal of Microwaves,2001,17(1):35-39.(in Chinese)
[10]	崔索民,吴振森.PTD和PTDEEC算式的奇异点处理[J].电波科学学报,1997,12(4):369-374. CUI Suomin,WU Zhensen.Treatment of singularities in PTD and PTDEEC[J].Chinese Journal of Radio Science,1997,12(4):369-374.(in Chinese)
[11]	徐云学,龚书喜.等效电磁流边缘分量表达式的虚假奇异点处理[J].西安电子科技大学学报,2007,34(2):213-218. XU Yunxue,GONG Shuxi.Reatment of false singularities in fringe components of equivalent edge currents[J].Journal of Xidian University,2007,34(2):213-218.(in Chinese)
[12]	许小艳.开口腔体的RCS计算.西安:西安电子科技大学,2007. XU Xiaoyan.Calculation of the radar cross section for open-ended Cavities.Xi’an:Xidian University,2007.(in Chinese)
[13]	Polycarpou A C,Balanis C A,Birtcher C R.Radar cross section of trihedral corner reflectors using PO and MEC[J].Annals of Telecommunications,1995,50(5):510-516.