Towards the interface plane to the compressor however, significant deviations are observed. The isolated intake simulation is able to reproduce the static wall pressure field of the intake as well as the occurring flow separation. This publication compares results of three different numerical approaches to this test data: Isolated intake simulations, isolated compressor simulations with distorted inflow conditions, and a coupled simulation of intake and three stage compressor.
An experimental test case including a highly bent intake geometry and a state of the art turbofan engine was established and extensive measurement data was acquired.
Due to weight and space limitations, a close coupling of intake and compressor is necessary. As the flow passes through such ducts, combined total pressure and swirl distortions are generated which have a negative impact on compressor performance, safety margin, and durability. A key component of these systems are highly bent intake geometries. Integrated propulsion plays a major role in future civil and military aircraft design.
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