Electromagnetic modeling of the jet aircraft intake with the interior impeller

A 3D electromagnetic model of an aircraft intake terminated with a blade structure is based on utilization of the equivalence theorem and integral expressions for electromagnetic fields. Acceptable numerical efficiency is achieved due to the implementation of a special algorithm of successive electromagnetic field calculation through the sectioned air duct from the inlet aperture to the termination section and backwards. The equivalent surface currents over the apertures separating the sections and conducting walls are calculated iteratively in separate processes for each section. Wall smoothness and large dimensions of the duct are taken into account to reduce computational cost. Rigorous integral equation techniques exploiting the rotational periodicity of the impeller are employed to treat the termination. The far field is evaluated via integrating currents over the intake aperture.