压气机数字孪生模型中的仿真技术探索

Exploration of Simulation Technology in the Digital Twin Model of Compressor

仿真技术是构建压气机数字孪生体的一种重要手段。为了满足数字孪生过程中准确性和实时性要求,给出了压气机数字孪生模型中的数值模型完备性分析,探索了一种将高性能计算与全环非定常模拟相结合的压气机孪生仿真技术。采用数值完备性定义某S弯进气道中涵道风扇的数字孪生体,从边界条件完备性与几何模型完备性方面分析了不同数值模型对涵道风扇数值孪生结果的影响;再结合现代高性能计算技术提出了一种压气机数字孪生过程中的高效计算技术,并针对某15级压气机开展了多级全环非定常模拟仿真计算。结果表明:满足压气机数值模型完备性要求是实现压气机数字孪生体准确性的前提,同时采用2层次计算模型的高效计算技术是获得压气机孪生模型的一种有效手段。

Simulation is an important means to construct digital twin for compressors.To meet the accuracy and real-time require⁃ments in the process of digital twin,a numerical model completeness analysis method was developed for the compressor digital twin model,and a digital twin simulation technology combing high-performance computing with full-annulus unsteady simulation was explored.The digital twin of a ducted fan with an S-shaped inlet was defined by the completeness analysis method,in terms of boundary condition com⁃pleteness and geometric model completeness,influences of different numerical models on the ducted fan digital twin were analyzed;Com⁃bined with modern high-performance computing technology,a high-performance computing technique for the digital twin process of the compressor was proposed,and multi-stage full-annulus unsteady simulations for a 15-stage compressor was conducted.The results show that meeting the completeness requirements of the compressor numerical model is a prerequisite for achieving digital twin accuracy,and the two-level parallel model of high-performance computing is an effective means for obtaining the compressor digital twin model.