轴对称及二元喷管RCS的数值模拟

杨涛; 杨青真; 李岳锋

轴对称及二元喷管RCS的数值模拟

西北工业大学动力与能源学院,西安 710072

计量
- 文章访问数: 1922
- HTML浏览量: 126
- PDF量: 39
- 被引次数: 0
出版历程
- 收稿日期: 2010-09-15
- 修回日期: 2011-01-04
- 刊出日期: 2011-08-28

Numerical simulation of RCS for axisymmetric nozzles and symmetrical two-dimensional nozzle

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

摘要

摘要: 利用物理光学迭代法独立设计程序,采用前后向算法并结合欠松弛因子加速收敛,提高运算效率.通过计算简单标准模型的雷达散射截面(RCS)验证了程序的可靠性.在此基础上,对两种不同宽高比二元喷管简化模型及轴对称喷管简化模型的RCS进行了计算并加以分析比较.结果表明,程序具有较好的计算精度和通用性,在较大范围的姿态角内,二元喷管简化模型的RCS高于轴对称喷管简化模型的RCS.
- 物理光学迭代法 /
- 雷达散射截面 /
- 二元喷管 /
- 轴对称喷管 /
- 欠松弛因子
Abstract: The iterative physical optic method was used for the programming code to calculate radar cross section (RCS),while the forward-backward algorithm combined with relaxation factor was used to accelerate the convergence and improve operation efficiency.Some sample standard models were calculated to validate the reliability of the code;based on this,the RCS of two-dimensional(2-D) nozzles with different aspect ratios and an axisymmetric nozzle was computed and compared.According to the numerical results,this procedure has high accuracy and versatility,and the RCS of the 2-D nozzle is higher than that of the axisymmetric nozzle in the large angular range.
- iterative physical optic (IPO) approach /
- radar cross section(RCS) /
- two-dimensional nozzle /
- axisymmetric nozzle /
- under-relaxation factors

HTML

参考文献(12)

[1]	Arnon S,Rotman S R,Kopeika N S.Bandwidth maximization for satellite laser communication[J].IEEE Trans.on Aerospace and Electronic Systems,1999,35(2):675-682.
[2]	Ling H,Chou R C,Lee S W. Shooting and bouncing rays: calculating RCS of an arbitrary cavity [J].IEEE Trans.on Antennas and Propagation,1989,37(2):194-205.
[3]	Pino A G,Obelleiro F,Rodriguez J L.Scattering from conducting open cavities by generalized ray expansion (GRE) [J].IEEE Trans.on Antennas and Propagation,1993,41(7):989-992.
[4]	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.成都: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.Chengdou:University of Electronic Science and Technology of China,2007.(in Chinese)
[5]	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 subdomains splicing technique for IPO approach[J].Acta Electronica Sinica,2001,29(3):420-422.(in Chinese)
[6]	阮颖铮.雷达截面与隐身技术[M].北京:国防工业出版社,2002.
[7]	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)
[8]	Robert J B,Tomas L.Forward-backward iterative physical optics algorithm for computing the RCS of open ended cavities[J].IEEE Trans.on Antennas and Propagation,2005,53(2):793-799.
[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]	李争亭,胡毕富,席平.腔体RCS计算前置处理中网格单元的相互遮挡判断[J].工程图学学报,2008,29(1):61-66. LI Zhengting,HU Bifu,XI Ping.Mutual occlusion evaluation of duct mesh elements in processing of RCS calculation[J].Journal of Engineering Graphics,2008(1):61-66.(in Chinese)
[11]	姬金祖,刘战合.基于面元分组的电磁遮挡算法及其优化[J].北京航空航天大学学报,2009,35(4):453-456. JI Jinzu,LIU Zhanhe.Electromagnetic occultation algorithm based on facets grouping and optimization[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(4):453-456.(in Chinese)
[12]	Femando O,Jose L,Robert J B.An interative physical optics approach for analyzing the electromagnetic scattering by large open-ended cavities[J].IEEE Trans.on Antennas and Propagation,1995,43(4):356-361.