Investigation on the Effects of Geometric Parameters on Airfoils' Stealth Characteristics
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摘要: 采用矩量法研究了飞翼布局机体设计中常采用的反弯度翼型的雷达散射特性,给出了翼型前向±60°的雷达散射截面分布及前向±30°的雷达散射截面均值。采用本文中提出的参数影响因子评价方法评价了翼型参数对雷达散射截面的影响,获得了翼型参数对雷达散射截面的影响规律和影响优先级,并简要分析了这些参数变化对气动设计可能产生的影响。研究结果表明:对翼型前向±30°的雷达散射截面均值影响较大的几何参数是翼型上下表面前缘半径、上下表面最大厚度以及后缘角。Abstract: To obtain the effects of airfoil geometry on Radar Cross Section(RCS),the RCS characteristics of a series of reflex airfoils were investigated using the method of moment(MOM) with high accuracy.These airfoils are usually used in the design of blended-wing-body(BWB) airframe and are modeled by the parametric method.The MOM is validated on the NACA0012.The bistatic RCS of NACA0012 agrees well with the data of references.An effective factor was defined to qualify the effects of geometric parameters on the RCS.Meanwhile,the effects of geometric parameters on aerodynamic characteristics were also considered.Based on the effective factor analysis using table values,the geometric parameters were divided into three categories in the RCS design.
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Key words:
- airfoils /
- stealth /
- radar cross section /
- the method of moment
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[1] 贾云峰. FEKO在雷达散射截面计算中的应用[J].中国制造业信息化,2008,(2):59-61 [2] 马东立. 翼形几何参数对机翼散射特性的影响[J].北京航空航天大学学报,1998,124(2):197-199 [3] 马东立,武哲. 飞机翼面类部件的雷达散射截面计算[J].系统工程与电子技术,1994,(6):33-39 [4] 李启鹏. 飞机部件RCS计算与减缩技术研究[D].西安:西北工业大学,2010 [5] 夏露. 飞行器外形气动、隐身综合优化设计方法研究[D].西安:西北工业大学,2004 [6] 王明亮. 飞行器气动与隐身综合设计研究[D].西安:西北工业大学,2005 [7] Sobieczky H. Parametric Airfoils and Wings,Notes on Nu-merical Fluid Mechanics[R].Vieveg,1998:71-78 [8] Knott E F. A progression of high frequency RCS prediction tech-niques[A].Proceedings of the IEEE[C],1985,73(2) [9] Youssef Z. Radar cross section of complex targets[J].Proceedings of the IEEE,1989,77(5):722-734 [10] Knott E F,Thomas BA Senior. A Program Incorporation Dif-fraction for the Computation of Radar Cross Section [R].AD768443,1973 [11] Aronstein D C. The Development and Application of AircraftRadar Cross Section Prediction Methodology [R].AIAA 96-5539,1996 [12] Vinh H. Finite-difference Algorithms for the Time-do-main MaxwelTs Equations-A Numerical Approach to RCSAnalysis [R].AIAA 92-2989,1992 [13] Shankar V,Hall W F,Mohammadian A H. A time-domain dif-ferential solver for electromagnetic scattering problems[J].Pro-ceedings of the IEEE[C],1989,77(5):709-721 [14] 余雄庆,杨景佐. 飞机隐身设计基础[M].南京航空学院,1992.
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