Influence of Vacuum Level on Heat Transfer Characteristics of Maglev Levitation Electromagnet Module
Source abstract
Abstract
The vacuum tube transportation (VTT) system has been a promising direction of future transportation. Within this system, a high-speed maglev travels in a low-vacuum environment to reduce aerodynamic drag. However, the heat dissipation of on-board heating devices will be compromised under low-vacuum conditions, and the device performance may thus be lowered. This study investigates the low-vacuum conjugate heat transfer characteristic of a levitation electromagnet module of a maglev using an experimentally verified numerical method. During the heating process, the surface temperature distribution of the levitation electromagnet, and the temperature and velocity characteristics of the flow field are examined. It is found that, as the vacuum level increases from 1.0 atm to 0.1 atm, the total heat dissipating from the levitation electromagnet module is decreased by 49% at 60 min, the contribution of convection heat flux over the total heat flux is decreased from 49% to 17%, and the convection heat transfer coefficient of the levitation electromagnet is decreased by 89%. This study can provide an efficient numerical model for low-vacuum heat transfer study on a VTT system as well as help the evaluation and optimization of low-vacuum maglev thermal management systems.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Aerodynamics and Fluid Dynamics Research · Refrigeration and Air Conditioning Technologies · Plasma and Flow Control in Aerodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Traffic Safety on Track, Central South University, Ministry of Education, Changsha 410075, China
Joint International Research Laboratory of Key Technologies for Rail Traffic Safety, Changsha 410075, China
National and Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha 410075, China
College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410000, China
Funding
Chinese Academy of Engineering · National Key R&D Program of China · Graduate Student Independent Innovation Project of Central South University
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