摘要
采用vanLeer矢通量分裂格式求解Euler方程的方法计算了绕翼型的气动特性;采用矢通量分裂方法计算了绕翼型的时域电磁散射场特性及雷达散射截面积(RCS);采用一种简单而有效的数值优化方法对流场解和电磁场解进行了翼型外形高气动效率/低可探测性的优化计算。算例结果表明,本方法提供了一种对翼型既可作气动优化设计亦可进行多学科综合设计的有效工具。
van Leer's splitting scheme is used to solve the Euler equations to obtain the aerodynamic characteristics. The vector flux splitting scheme is used to calculate the time domain electromagnetic scattered characteristics . Radar cross section (RCS) is then evaluated with the equivalence principle and Fast Fourier Transformation . Two obtained solutions are coupled with a simple effective numerical optimization algorithm to obtain high aerodynamic efficiency and low observability of the airfoil. Numerical results show that the present method is an effective and robust tool for designing or revising airfoils, as well as for multi disciplinary optimization.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1998年第6期641-646,共6页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金
关键词
数值优化
气动/隐形
综合设计
翼型
隐形
numerical optimization, Euler equations of motion, Maxwell equation, multi disciplinary optimization