外形参数对矩形截面弹体气动和隐身特性的影响

用流体动力学(CFD)数值模拟方法和图形算法(GRECO),对机载布撒器绕流场进行了数值模拟和雷达散射截面(RCS)的计算,得到气动特性数值计算结果与风洞试验结果,RCS计算结果与外场测量结果均十分吻合.在此基础上研究了矩形截面宽高比和圆角半径比对弹体气动特性和隐身特性的影响.计算结果表明,建立外形参数与气动和隐身特性关系数据库、发展基于数据库的气动特性和隐身特性的工程计算方法,是进行布撒器等非常规外形和特种部件气动设计和RCS设计的有效途径.

Numerical Study of Aerodynamic and Stealth Characteristics of Missiles with Rectangular Cross-Section

Computational fluid dynamics (CFD) numerical simulation method was used to simulate the flow field of dispenser and graphical electromagnetic computing (GRECO) method was used to compute dispenser's radar cross section (RCS). Good agreements were obtained between the computed aerodynamic characteristics results and the wind tunnel test results and between the computed RCS and the outdoor measured results. Aerodynamic characteristics and RCS of rectangular cross-section missiles with variable width-to-thickness ratio and rounded corners radius ratio were calculated. It is an effective method for dispenser aerodynamic design and stealth design with the help of the calculated relational database between the bodies geometrical parameters and the dispenser aerodynamics characteristics or RCS.