[关键词]
[摘要]
针对整机环境下压气机多级导叶调节规律选取问题,开发了面向对象、灵活建模的整机性能0D仿真程序,搭建了多级压气机3D CFD仿真模型,集成建立了整机0D-3D变维度耦合仿真模型并开展了整机变维度耦合仿真方法研究,以E3大涵道比涡扇发动机及其10级高压压气机为对象进行了应用探索。结果表明:与基于经验关系的0D方法相比,变维度耦合仿真方法具有更高精度;基于特性修正方法的变维度仿真结果与初始特性图选取有关,反映真实流动和性能的、由CFD计算得到的特性图可更快、更准的获得收敛结果,仅需3-7次迭代即可让折合流量、效率和导叶开度的相对误差收敛至0.2%以下。
[Key word]
[Abstract]
In order to address the issue of selecting adjustment laws for multistage stators in the whole engine environment, an object-oriented and flexible modeling approach of zero-dimensional (0D) simulation program for whole-engine performance was developed. A three-dimensional (3D) Computational Fluid Dynamics (CFD) simulation model for multistage compressors was constructed, and an integrated whole-engine 0D-3D coupling simulation model was established to study the zooming method for the whole engine. The re-search was applied to the E3 high-bypass ratio turbofan engine and its 10-stage high-pressure compressor (HPC). The results show that the zooming method has higher accuracy compared to the empirical 0D method. The zooming technique based on the iterative coupling method are related to the selection of initial characteristic maps. The characteristic maps calculated by CFD, which reflect the real flow and performance, can obtain convergence results faster and more accurately, only 3-7 steps to achieve a relative error below 0.2% for corrected mass flow, efficiency, and stator angles.
[中图分类号]
TK14
[基金项目]
国家自然科学基金项目(面上项目,重点项目,重大项目)