Cowcatcher with passive turbulent flow structure and application thereof

An obstacle remover and streamlined technology, applied in the direction of railway vehicle wheel guards/bumpers, railway car body parts, transportation and packaging, etc., can solve the problem of small peak noise suppression, limited effect of shear layer control, near-field noise Analyze fewer problems to achieve the effect of reducing excitation, reducing impact, and reducing peak noise

Pending Publication Date: 2021-12-31
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned disclosed obstacle remover structure has a certain effect of controlling aerodynamic noise. The through-flow obstacle remover reduces the broadband noise by directing the front airflow to both sides, but due to its limited effect on shear layer control, therefore Little effect on peak noise suppression
The pit remover reduces the peak noise by increasing the disturbance to the shear layer, but it greatly increases the broadband noise from 1kHz to 5kHz
And the two mainly analyze the noise reduction effect of far-field noise, and the analysis of near-field noise in the cabin is less

Method used

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  • Cowcatcher with passive turbulent flow structure and application thereof
  • Cowcatcher with passive turbulent flow structure and application thereof
  • Cowcatcher with passive turbulent flow structure and application thereof

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1-Figure 2 It is a schematic structural diagram of an ordinary obstacle remover, which does not have the function of reducing the aerodynamic noise in the bogie area of ​​the front of the high-speed train.

[0031] In order to effectively control the aerodynamic noise generated by the operation of high-speed trains, the present invention provides a barrier remover with a passive spoiler structure for reducing the aerodynamic noise in the bogie area of ​​the high-speed train head, such as Figure 3-Figure 4 As shown, including the obstacle remover body 1, the obstacle remover body 1 is a flat structure with a variable cross-section and streamlined shape, the front end is an upflow surface, and the bottom and rear end of the obstacle remover body 1 is provided with a cylindrical spoiler structure 2. The flow structure is hoisted...

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Abstract

The invention relates to a cowcatcher with a passive turbulent flow structure and application thereof. The cowcatcher comprises a cowcatcher body, the cowcatcher body is of a flat streamline structure, the passive turbulent flow structure is installed at the rear end of the bottom of the cowcatcher body, and the outline of the turbulent flow structure is cylindrical and is perpendicular to the airflow direction; and the ratio of the distance between the spoiler and the flat end face of the rear end of the cowcatcher body to the diameter of the spoiler is smaller than 1. Compared with the prior art, the angle of airflow entering the bogie cabin is changed through the interaction of the cylindrical wake flow and the shear layer, and aerodynamic noise generated in the bogie area of the high-speed train is effectively reduced.

Description

technical field [0001] The invention relates to the technical fields of high-speed train vehicle equipment technology and aerodynamic noise control, in particular to an obstacle remover with a passive spoiler structure and its application. Background technique [0002] With its advantages of safety, reliability, comfortable and convenient transportation service and high efficiency and energy saving, high-speed railway has been developing rapidly in all countries in the world. In order to better promote the development of the transportation industry, vigorously improve transportation efficiency, and solve the pressure of railway transportation during peak passenger flow periods, high-speed railways have become an important trend in the development of the world today. [0003] With the continuous increase of train speed, the resulting environmental problems have become increasingly prominent. A large amount of actual operation experience shows that the noise problem is the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61F19/06
CPCB61F19/06
Inventor 陈羽刘嘉楠李启良夏超王毅刚杨志刚
Owner TONGJI UNIV
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