:When high-speed railway further speeds up, it will face huge energy consumption, aerodynamic noise and horizontal wind instability problems. Vacuum tube traffic can well solve the above operation problems. Based on the minimum space size, Knudsen number can be calculated. Based on Knudsen number, fluid flow state can be determined in the vacuum pipe. Based on the three-dimensional, unsteady and compression effect, vacuum aerodynamic calculation model is established, include train, station and pipeline, to analysis the relationship among train running speed, vacuum degree, blockage ratio, environment temperature and train aerodynamic drag. Studies show that train aerodynamic drag is parabolic incremental relationship with speed, linear incremental relationship with vacuum degree, linear incremental relationship with blockage ratio and linear incremental relationship with environmental temperature. The higher the train speed, the lower the vacuum degree, the higher the blockage ratio, the higher the environmental temperature, the higher the train aerodynamic drag. The research results provide theoretical basis for the value of Knudsen number feature length, the judgment of fluid flow state in vacuum pipeline, the numerical calculation of vacuum aerodynamics and the analysis of aerodynamic drag of vacuum pipeline traffic train. Key words:vacuum tube traffic;aerodynamic drag;speed;vacuum degree;blockage ratio;environmental temperature 0 前言*
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.