Electromagnetic Scattering and Aerodynamic Characteristics of the Side-Mounted Inlet
Electromagnetic scattering and aerodynamic simulation models for the side-mounted S-shaped inlet were built respectively based on the multilevel fast multipole method(MFLMM)and finite volume method.The influ-ence of two main geometric parameters,inlet shape and offset,on the inlet RCS and total pressure recovery coefficient was compared and analyzed.The results show that:The inlet with equilateral triangle intake exerts better stealth per-formance,and its RCS decreases with offset.The inlet with trapezoidal intake gets better stealth performance when the terminator is just covered by the smallest offset,and its RCS is sensitive to the direction of polarization.The Influence of intake shape on aerodynamic performance is greater than that of the offset.The inlet with trapezoidal intake exerts better aerodynamic performance than triangular inlet,and the difference is small.Considering both aerodynamic and stealth performance,the inlet with equilateral triangle intake is better.By increasing its offset,the stealth performance can be greatly improved with less aerodynamic loss.
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