An integrated modeling approach for variable cycle engine performance analysis

Abstract

The present study aims to address the issue of accuracy degradation in the traditional zero-dimensional variable cycle engine (VCE) model due to the multi-angle characteristics in the core driven fan stage (CDFS). To this end, a two-dimensional model was established through the application of the streamline curvature method. Subsequently, a multi-level VCE model was developed incorporating three zooming strategies to integrate the CDFS characteristics. The simulation results reveal that the proposed multi-level modeling approach is relatively time-efficient, requiring only half the computational time of fully coupled strategies. The results indicate a significant improvement in terms of optimal thrust and specific fuel consumption (sfc) when compared to the traditional zero-dimensional VCE model, with differences in maximum thrust and sfc of 3.11% and 1.24%, respectively. Furthermore, the average time required to solve one working point remains less than one second.