Research On Aero Engine Intake Distortion Based On 3D CFD Full Engine Simulation

Abstract

Intake distortions have large impacts on the performance of aero engines, and the investigations on intake distortions are in great need. Note that the component-decoupled simulations tend to break the constraint of power matching between compressor/turbine, which is key to understanding the underlying complicated process of intake distortions. In the present work, a steady-state three-dimensional component-coupled full engine simulation for a micro-turbojet engine, in which the aerodynamic/power matching is guaranteed, was employed to study the impacts of intake distortion on the engine operating state. The coupled/decoupled simulations are first applied to the states without intake distortion to reveal the advantage of coupled scheme. For intake distortion conditions, two typical adjustment strategies are adopted respectively to make the engine stable at rebalanced operating points, and the performance of the compressor in conjunction with the thrust of the full engine is analysed in detailed. The analytical results show that the matching problems induced by intake distortions are systematically demonstrated by the component-coupled scheme.