A high-speed train wake passive control method

Abstract

A high-speed train wake passive control method, the steps are as follows: through theoretical analysis or numerical simulation or wind tunnel experiment method to find out the area where flow separation occurs on the surface of the tail car; set array pits on the flow separation area of ​​the tail car to form Non-smooth surface: By establishing the CAD model of the high-speed train under the non-smooth surface parameters, the CFD method is used to simulate the flow field in the wake area of ​​the high-speed train, and finally determine the optimal non-smooth surface parameters of the above pits. The invention has the characteristics of improving the vortex structure at the tail of the train, slowing down the vortex motion of the wake, reducing the pressure difference resistance of the whole vehicle, improving the running stability of the train, etc., and has deep theoretical guiding significance and practical promotion value.

Description

technical field [0001] The invention relates to a method for controlling the wake of a high-speed train, in particular to a method for reducing the motion intensity of the wake of a high-speed train and suppressing the vibration of the trailing train by using a non-smooth surface. Background technique [0002] The running speed of modern high-speed trains continues to increase, and the aerodynamic problems of trains are becoming more and more prominent. The wake problem of high-speed trains is also a key issue among many aerodynamic problems. [0003] At present, many studies have pointed out that with the continuous increase of the running speed of high-speed trains, the wake of high-speed trains will bring many problems: (1) The formation of wake areas of high-speed trains will increase the aerodynamic resistance of vehicles and reduce the energy consumption of vehicles. (2) The wake area of ​​the high-speed train is the area with the highest wind speed, which will endange...

AI Technical Summary

Problems solved by technology

[0003] At present, many studies have pointed out that with the continuous increase of the running speed of high-speed trains, the wake of high-speed trains will bring many problems: (1) The formation of wake areas of high-speed trains will increase the aerodynamic resistance of vehicles and reduce the energy consumption of vehicles. (2) The wake area of ​​the high-speed train is the area with the highest wind speed, which will endanger the safety of passengers waiting on the platform and staff beside the track; (3) The aerodynamic force formed by the violent vortex motion at the train tail acts on the The tail car will aggravate the vibration of the tail car, endangering the safety and stability of driving

The main goal of this patent is to effectively reduce the aerodynamic lift of the tail car of the high-speed train. The eddy current controller proposed by it has a right-angled trapezoidal structure, which has defects such as complicated manufacturing of the eddy current controller, high installation requirements, and a great impact on the appearance of the train.

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