阅读说明：本技术 一种后端设置锯齿形扰流板的排障器及其应用 (Obstacle deflector with sawtooth-shaped spoiler at rear end and application thereof ) 是由 朱剑月 王毅刚 李启良 陈羽 夏超 沈哲 杨志刚 于 2019-10-14 设计创作，主要内容包括：本发明涉及一种后端设置锯齿形扰流板的排障器及其应用,包括排障器本体(1),所述排障器本体(1)为扁平状结构,外形轮廓呈变截面流线型,前端为迎流面,所述排障器本体(1)的后缘设置锯齿形扰流板(2),所述扰流板(2)的前缘与排障器本体(1)的底部后端连接,后缘在水平面内沿展向呈凹凸相间锯齿形布置。与现有技术相比,本发明可有效降低高速列车排障器和转向架区域气动噪声的产生。(The invention relates to an obstacle deflector with a sawtooth-shaped spoiler at the rear end and application thereof, and the obstacle deflector comprises an obstacle deflector body (1), wherein the obstacle deflector body (1) is of a flat structure, the outline of the obstacle deflector body is in a variable cross-section streamline shape, the front end of the obstacle deflector body is a flow-facing surface, the sawtooth-shaped spoiler (2) is arranged at the rear edge of the obstacle deflector body (1), the front edge of the spoiler (2) is connected with the rear end of the bottom of the obstacle deflector body (1), and the rear edge of the spoiler is arranged in a concave-convex zigzag manner in the horizontal plane along the spreading direction. Compared with the prior art, the invention can effectively reduce the generation of pneumatic noise in the area of the high-speed train obstacle deflector and the bogie.)

1. A barrier removing device with a sawtooth-shaped spoiler at the rear end comprises a barrier removing device body (1), wherein the barrier removing device body (1) is of a flat structure, the outline of the barrier removing device body is of a variable cross-section streamline shape, the front end of the barrier removing device body is a flow-facing surface,

the obstacle deflector comprises a barrier deflector body (1), and is characterized in that a spoiler (2) is arranged at the bottom of the rear end of the barrier deflector body (1), the outer edge of the spoiler (2) is of a sawtooth structure, and the sawtooth structure is uniformly arranged along the spanwise direction of the spoiler (2).

2. The barrier remover with the sawtooth-shaped spoiler at the rear end as claimed in claim 1, wherein the spoiler (2) is a flat strip, the front end of the spoiler is connected with the bottom rear edge of the barrier remover body (1), and the rear end of the spoiler is of a sawtooth-shaped structure uniformly distributed in the spanwise direction.

3. The barrier remover with the sawtooth-shaped spoiler at the rear end as claimed in claim 1, wherein the inner angle of the tip of the sawtooth (201) of the sawtooth-shaped structure is 60-90 °.

4. A barrier guard with a rear end provided with a saw-tooth shaped spoiler according to claim 3, wherein the length of the saw-tooth (201) is 30mm-70 mm.

5. The obstacle deflector with the sawtooth-shaped spoiler arranged at the rear end as claimed in claim 4, wherein the pitch of the sawtooth (201) is 40mm-80 mm.

6. The barrier eliminator with the sawtooth-shaped spoiler arranged at the rear end as claimed in claim 1, wherein the spoiler (2) is mounted on the barrier eliminator body (1) by bonding or bolting.

7. The barrier remover with the sawtooth-shaped spoiler at the rear end as claimed in claim 1, wherein the spoiler (2) is made of alloy or engineering plastic material.

8. Use of a rear end zigzag spoiler in accordance with any one of claims 1-7 for a high speed train to reduce aerodynamic noise generated in the area of the deflector and the bogie.

9. The application of the barrier remover with the sawtooth-shaped spoiler at the rear end as claimed in claim 8, wherein the barrier remover is closely attached to the bottom area of the nose cone of the head of the high-speed train.

Technical Field

The invention relates to the technical field of high-speed train vehicle equipment and pneumatic noise control, in particular to a barrier removing device with a sawtooth-shaped spoiler at the rear end and application thereof.

Background

The high-speed railway is developed rapidly in various countries in the world due to the advantages of safe, reliable, comfortable and convenient transportation service characteristics, high efficiency, energy conservation and the like. In order to better promote the development of the transportation industry, greatly improve the transportation efficiency and solve the railway transportation pressure in the peak time of passenger flow, the railway high-speed has become an important trend of the development of the current world.

With the continuous improvement of the running speed of the train, the environmental problems caused by the continuous improvement are increasingly prominent, and the running experience of domestic and foreign high-speed railways shows that the noise problem is most prominent in the environmental pollution of the high-speed train. When the running speed of the high-speed train exceeds 300km/h, the aerodynamic noise exceeds the wheel rail rolling noise and the traction noise to occupy a dominant position. The main pneumatic noise sources of the high-speed train are a bogie, a pantograph pit, a connecting part of a carriage and the like. According to the contribution amount of the whole vehicle radiated noise, the bogie generates pneumatic noise about 15dB higher than that of a pantograph due to the large number of bogies. In the area of a bogie at the head of a high-speed train, when airflow flows through, violent flow separation and fluid impact are generated, and the airflow becomes a stronger pneumatic noise source. Therefore, the noise in the area of the head bogie is effectively reduced and restrained, the environmental quality along the railway and the noise level in a cab are improved, and the design and production of the high-speed train need to be considered and solved.

Disclosure of Invention

The invention aims to solve the problems and provides a barrier removing device which can effectively reduce the aerodynamic noise of a bogie area at the head of a high-speed train and is provided with a sawtooth-shaped spoiler at the rear end and application thereof.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a high-speed train pilot structure, its rear end sets up the zigzag spoiler, includes the pilot body, the pilot body is the platykurtic structure, and the appearance profile is the variable cross section streamlined, and the front end is the incident surface, the bottom rear end of pilot body sets up a spoiler, the outside edge of spoiler is along the zigzag structure of spanwise equipartition range, and the spoiler adopts to paste or bolted connection mode and this body coupling of pilot.

The spoiler arranged at the rear edge of the obstacle deflector body is a flat long strip plate, the front edge of the spoiler is connected with the bottom of the obstacle deflector body, the rear edge of the spoiler is arranged in a zigzag manner in the horizontal plane along the extending direction, and the spoiler has the function of interfering the formation and the falling of large-scale vortexes at the rear edge of the vehicle head obstacle deflector and the front edge of a bogie cabin, reducing the turbulence vortex strength, the transport speed and the extending direction coherence of the tail end of the obstacle deflector, and inhibiting the formation and the interference of unstable disturbance waves, thereby reducing the generation of aerodynamic noise.

Further, the internal angle of the tooth tops of the saw teeth of the saw-tooth-shaped structure is 60-90 degrees.

Further, the length of the saw teeth is 30mm-70 mm.

Furthermore, the spoiler is made of alloy or engineering plastics and other materials.

The invention arranges the sawtooth-shaped spoiler at the rear end of the bottom of the obstacle deflector body, and controls and optimizes the pneumatic noise reduction effect of the bogie area of the head of the high-speed train by changing the parameters such as the included angle, the length, the interval and the like of the sawtooth.

The utility model provides an application of pilot of rear end setting zigzag spoiler, this pilot is applied to high-speed train, closely laminates with locomotive nose awl bottom region for reduce the pneumatic noise that pilot and bogie area produced.

The invention provides a barrier remover structure with a sawtooth-shaped spoiler at the rear end, which is inspired from the mechanism of silent flight of owl-shaped birds based on the bionics design concept, the outline of the barrier remover structure is transited in a streamline variable cross-section curve form, the sawtooth-shaped spoiler is arranged at the rear end of the bottom, the large-scale turbulent vortex is disturbed to form and fall off from the rear edge of a locomotive barrier remover and the front edge of a bogie cabin, the flow separation of the vortex is inhibited, the interaction between the wake and the fluid of each geometric body in the bogie cabin is alleviated, and the formation of pressure pulsation on the solid wall surface of the geometric body at the rear edge of the barrier remover and the front edge of the bogie cabin is weakened, so that the generation of aerodynamic noise of the barrier remover and structural components in the bogie cabin is inhibited, and the aerodynamic noise control effect of a bogie.

The invention can also be installed at the front edge of the bogie cabin in the area of the bogie outside the vehicle head part, so as to reduce the generation and radiation of aerodynamic noise in the area.

Compared with the prior art, the invention has the following advantages:

(1) the obstacle deflector structure provided by the invention has the advantages that the contour is designed in a streamline variable cross-section curve form, the rear end of the obstacle deflector structure is provided with the sawtooth-shaped spoiler, the flow impact of the incoming flow of a high-speed train and the geometrical body of the obstacle deflector can be relieved, the development of a shear layer at the rear edge of the obstacle deflector during the operation of the high-speed train is inhibited, the turbulence vortex strength, the conveying speed and the unfolding coherence of the tail end of the obstacle deflector are reduced by combing the flow structure again, the surface pressure pulsation formation is weakened, and the generation of the aerodynamic noise of the obstacle deflector part is effectively controlled.

(2) The sawtooth-shaped spoiler arranged at the rear end of the obstacle deflector can effectively destroy the formation and the falling of the separation vortex at the rear edge part of the bottom of the obstacle deflector, relieve the interaction of the wake and the fluid of the geometrical body in the bogie cabin, weaken the generation of pressure pulsation on the fixed wall surface of each structural part in the bogie area, and effectively improve the pneumatic noise control effect of the bogie area.

Drawings

FIG. 1 is a schematic structural diagram of a conventional obstacle deflector;

fig. 2 and 3 are schematic structural views of the obstacle deflector with a sawtooth-shaped spoiler at the rear end according to the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a schematic structural diagram of a sawtooth spoiler;

FIG. 6 is a side view of a rear end serrated spoiler mounted on a high speed train in accordance with the present invention;

FIG. 7 is a front view of a pilot assembly of the present invention with a serrated spoiler at the rear end of the pilot assembly mounted on a high speed train;

FIG. 8 is an enlarged view at B in FIG. 6;

FIG. 9 is a comparison graph of one third octave test data of far field radiated noise for a 60 ° internal angle of the serration tip of the present invention;

FIG. 10 is a comparison graph of one third octave test data of far field radiated noise for a 90 ° internal angle of the serration tips of the present invention;

fig. 11 is a sound source recognition result obtained by using a far field microphone array of a general obstacle deflector;

fig. 12 is a sound source recognition result obtained by using a far field microphone array of the barrier remover according to the present invention having a saw-tooth spoiler at the rear end thereof.

In the figure: 1-a pilot body; 2-a spoiler; 201-saw teeth; 3-vehicle head; 4-a bogie; 5-steel rail.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.