Integration of high-fidelity model of forward variable area bypass injector into zero-dimensional variable cycle engine model

• 作者: Fu SONG Li ZHOU Zhanxue WANG Zhifu LIN Jingwei SHI
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（8）
• 页码范围: 1-15
• 页数: 15页
• 语种: 英文

摘要

Forward Variable Area Bypass Injector (FVABI) is one of key components which con-tributes to modulate the cycle parameters of Variable Cycle Engine (VCE) under various operation conditions.The modeling method of zero-dimensional FVABI was reviewed and its deficiency was analyzed based on FVABI flow characteristic.In order to improve the accuracy of VCE perfor-mance simulation,the high-fidelity modeling method of FVABI was developed based on its working characteristics.Then it was coupled with the zero-dimensional VCE model and the multi-level VCE model was built.The results indicate that the geometric and aerodynamic parameters can affect the interaction between the two airflows and the zero-dimensional FVABI model is too simple to pre-dict the component performance accurately,especially when the FVABI inner bypass is chocked.Based on the performance curves for single bypass mode and the regression model of multi-scale support vector regression for double bypass mode,the high-fidelity model can predict FVABI per-formance accurately and rapidly.The integration of high-fidelity FVABI model into zero-dimensional VCE model can be done by adjusting iterative variables and balance equations.The multi-level model has good convergence and it can predict VCE performance when the FVABI inner bypass is chocked.