基于理论与CFD仿真的压气机轴向气动力计算与分析  

Calculation and Analysis of Axial Aerodynamic Forces of Compressor Based on Theory and CFD Simulation

作　　者：陈欣 叶文彬 刘莹莹 蒲万里 张志莲[2] CHEN Xin;YE Wenbin;LIU Yingying;PU Wanli;ZHANG Zhilian(Powerchina Turbo Technologies Co.,Ltd.,Chengdu,610041,China;Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]中国电建集团透平科技有限公司,四川成都610041 [2]北京石油化工学院,北京102617

出　　处：《北京石油化工学院学报》2025年第1期10-15,共6页Journal of Beijing Institute of Petrochemical Technology

摘　　要：针对氢燃料电池动压悬浮压气机轴向力计算不够完善的问题,在分析现有的轴向力计算方法的基础上,采用理论公式计算与计算流体动力学(CFD)仿真2种方法对压气机密封轴向气动力进行了研究。首先建立了基于经典气体动力学的理论计算模型,随后通过CFD仿真对模型进行了验证和细化,以准确模拟实际工况下的气动力影响。结果表明,通过理论公式计算得出轴向力大小与CFD仿真计算出的结果对应良好;2种方法各有优劣,在初步设计阶段和快速评估时,公式计算方法简便快速,而在详细设计和性能优化阶段,CFD能提供更为详细和精确的流场分析。通过2种方法的对比,不仅验证了理论模型的有效性,也指出了进一步优化压气机设计中需考虑的关键因素,对提高氢燃料电池系统的整体效率和安全性具有重要意义。Aiming at the problem of insufficiently complete calculation of the axial force of the dynamic pressure suspension compressor in hydrogen fuel cell,based on the analysis of the existing axial force calculation methods,the axial gas dynamic force of the compressor seal was studied by using two methods:theoretical formula calculation and computational fluid dynamics(CFD)simulation.Firstly,a theoretical calculation model based on classical gas dynamics was established,and then the model was verified and refined through CFD simulation to accurately simulate the influence of gas dynamic force under actual working conditions.The results show that the axial force calculated by the theoretical formula is in good agreement with the results calculated by CFD simulation;both methods have their advantages and disadvantages.In the preliminary design stage and rapid evaluation,the formula calculation method is simple and fast,while in the detailed design and performance optimization stage,CFD can provide more detailed and accurate flow field analysis.Through the comparison of the two methods,not only the validity of the theoretical model is verified,but also the key factors that need to be considered in further optimizing the compressor design are pointed out,which is of great significance for improving the overall efficiency and safety of the hydrogen fuel cell system.

关 键 词：压气机 轮背密封 轴向力 数值计算 数值模拟 

分 类 号：TH138.21[机械工程—机械制造及自动化]