Distribution of air flow around a high-speed train

Saidburkhan Djabbarov,D Bazarov

doi:10.1051/e3sconf/202126402029

Abstract

The article presents the results of theoretical studies to establish the nature of the distribution and determine the speed of the air flow formed along a moving high-speed passenger train. In studies, to preserve the geometric similarity, a high-speed train is considered in the form of a bar (or plate) of rectangular cross-section moving in three-dimensional space. To simplify the problem, the movement of a high-speed train at a speed of 160-250 km / h in flat terrain, when the height of the embankment is constant, is considered. Assuming that when a high-speed train moves, a turbulent wake is formed, the problem is solved for a turbulent flow using the method of the equivalent heat conduction problem. An equation for the distribution of the layer and along a moving high-speed passenger train is obtained. The results obtained at this stage made it possible to establish the size of the boundary layer and the nature of the change in the distribution of the air flow velocity in its aisles; investigate the impact of secondary air currents generated by high-speed passenger trains on the environment along the high-speed railway.

Highlights

1 Introduction In Japan, China, Korea, the USA, Russia, Germany, France, England, Spain and other countries of Europe conducted experimental and theoretical studies of the aerodynamics of high-speed trains and the related individual questions. This is, because motion and trains with high speeds occur to change the physics of air flows around the trains, which negatively affect both the dynamics of the train speed and the speed of the railway infrastructure
The results of empirical studies using a wind tunnel and a model of trains made it possible to establish the dependence of the magnitude of aerodynamic drag on speed, the shape of the head car and tail of the train, movement conditions, type of train [1-4]
The results of many years of theoretical and experimental research by C. Baker made it possible to establish and understand the physics of the formation of aerodynamic flows in all parts of a moving high-speed train; ensure the safety and comfort of passengers; to develop measures to reduce the aerodynamic resistance to the movement of the train [1317]

Summary

Introduction

In Japan, China, Korea, the USA, Russia, Germany, France, England, Spain and other countries of Europe conducted experimental and theoretical studies of the aerodynamics of high-speed trains and the related individual questions This is, because motion and trains with high speeds occur to change the physics of air flows around the trains, which negatively affect both the dynamics of the train speed and the speed of the railway infrastructure. Natural, remain unresolved, and a theoretical study of the velocity field around a moving high-speed train is required The study of their aerodynamic impact on various objects of the railway infrastructure located near the passing train is becoming more and more relevant for high-speed train traffic

Methods

Results and Discussion

Conclusions

11. Djabbarov ST PRESSURE TO RAILWAY INFRASTRUCTURE FROM THE