低真空管道磁浮系统结构参数优化理论研究

针对低真空管道磁浮系统结构参数设计存在的问题和不足,提出了一种基于正交理论和流体力学仿真相结合的参数设计方法,采用多因素正交试验方法,以列车气动阻力为评价指标,研究阻塞比、管道压力和运行速度对列车气动阻力的影响趋势,并采用极差分析和方差分析,确定各因素影响的主次顺序以及不同因素对列车气动阻力影响的显著性,获得最佳参数方案。试验结果表明:阻塞比对列车气动阻力的影响程度最大,管道压力的影响程度最小,且阻塞比和运行速度对列车气动阻力的影响最显著,管道压力不显著,获得较优的方案为阻塞比取0.1、运行速度取600 km/h、管道压力取700 Pa,优化结果将为低真空管道磁浮系统设计提供理论依据。

Design Optimization of Vacuum Tube Maglev Transport Conditions: A Theoretical and Orthogonal Experimental Study

The influence of the vacuum tube maglev(magnetic levitation) transport conditions,including the blocking-ratio,pressure and train-speed,on the aerodynamic resistance was empirically approximated,mathematically formulated with standard κ-ε turbulent model,theoretically analyzed in fluid mechanics,orthogonal theory and range-and-variance analysis,numerically simulated in computational fluid dynamics with software Fluent,and experimentally evaluated with multi-factor orthogonal test for the design optimization.The results show that the major impact factors can be listed in a descending order:the blocking ratio> train-speed> pressure.The optimized conditions included:a blocking ratio of 0.1,a train-speed of 600 km/h and a tube pressure of 700 Pa.We suggest that the herein reported results be of some basic and technological interest in development of vacuum tube maglev transport.