S型进气道隐身与气动综合特性数值分析

Nunerical Ananlysis on S-shaped Inlet Stealth / Aerodynamics Performance

针对S型进气道弯度对其隐身气动特性影响程度的问题,利用CAD软件对进气道进行参数化建模,通过改变进、出口的中心偏移量实现对进气道弯度的改变。采用数值仿真方法分别研究了进气道前向电磁散射特性和进气道流场及气动特性。仿真结果表明,进气道弯度增加对隐身特性和气动特性的影响是完全相反的,并进一步分析出这一现象的产生机理,对进气道的隐身气动一体化设计具有指导性意义。

To solve the S- shaped inlet＇s bending of influence on stealth / aerodynamics performance,the inlet parameterized model is established though CAD,by changing the center offsets of the in and out to change the bending. Inlet were studied using numerical simulation method of electromagnetic scattering characteristic and the inlet flow field and aerodynamic characteristics. The results show that the influence of inlet increased bending on stealth characteristics and aerodynamic characteristics is exactly the opposite,And further analysis the mechanism of this phenomenon,providing guidance to integrated design of inlet stealth / aerodynamics performance.