磁流体管流准一维模型的数值验证与性能分析

Validation and Performance Analysis for the Quasi-One-Dimensional Models of MHD Flows

关键词:  涡轮发动机  磁流体  管流  准一维模型

Key words:  Turbojet engine  MHD  Pipe flow  Quasi-one-dimensional models

摘要:

为了快速分析磁流体管流,采用涡轮喷气发动机模型对磁流体管流进行类比分析,引入变截面管流理论和修改过的多变效率表达式,推导了磁流体发电器和加速器的准一维模型,采用二维数值方法验证了准一维模型的可行性,利用该准一维模型对磁流体管流进行了性能分析,结果表明,多变效率的引入使准一维模型更加完整,当负载系数不变时,磁流体装置中的平均马赫数越低,其等熵效率越高。 

Abstract:

For the Purpose of quick analysis for the magnetohydrodynamic(MHD) flow,quasi-one-dimensional models for the MHD equipments have been deduced using the turbojet engine model, the variable cross-section pipe flow theory and the expressions of modified polytropic efficiencies. The feasibility of the quasi-one-dimensional models have been validated with the 2D numerical method. Then, the performance analysis has been performed with these quasi-one-dimensional models,which shows that the modified polytropic efficiencies make the models improved, and when the load factors is kept to be constant, the efficiencies of the MHD flow increase by decreasing the average Mach number.