阅读说明：本技术 一种滑动弧等离子体-高扰动交叉结构的燃油雾化喷嘴 (Sliding arc plasma-high disturbance cross structure fuel oil atomizing nozzle ) 是由 曾文 陈雷 杨昆 马洪安 刘宇 郑玮琳 刘爱虢 刘凯 陈潇潇 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种滑动弧等离子体-高扰动交叉结构的燃油雾化喷嘴,包括内壳体中设有进气腔a,在进气腔a底部安装有旋流器a；所述内壳体一侧设有与进气腔a连通的进气管路a,另一侧设有进油管路,所述进油管路与进油腔顶部相连通,所述进油腔底部分别连接有倾斜向下通道a和倾斜向下弧形通道b,所述通道a、通道b端部形成交叉喷孔,钨电极依次穿过端盖、进气腔a、旋流器a伸入滑动弧放电区内；在内壳体下部外周连接有外壳体,所述外壳体一侧设有与进气腔b连通的进气管路b,在进气腔b上部设有旋流器b。该喷嘴当发动机点火成功后,可以持续稳定的提供高活性等离子体活性基团,促进燃烧更加充分,提高燃烧效率,降低污染排放。(The invention discloses a fuel oil atomizing nozzle with a sliding arc plasma-high disturbance cross structure, which comprises an inner shell, wherein an air inlet cavity a is arranged in the inner shell, and a swirler a is arranged at the bottom of the air inlet cavity a; an air inlet pipeline a communicated with the air inlet cavity a is arranged on one side of the inner shell, an oil inlet pipeline is arranged on the other side of the inner shell, the oil inlet pipeline is communicated with the top of the oil inlet cavity, the bottom of the oil inlet cavity is respectively connected with an inclined downward channel a and an inclined downward arc-shaped channel b, cross spray holes are formed at the end parts of the channel a and the channel b, and tungsten electrodes sequentially penetrate through the end cover, the air inlet cavity a and the swirler a and extend into the sliding arc discharge area; the periphery of the lower part of the inner shell is connected with an outer shell, one side of the outer shell is provided with an air inlet pipeline b communicated with the air inlet cavity b, and the upper part of the air inlet cavity b is provided with a swirler b. After the engine is ignited successfully, the nozzle can continuously and stably provide high-activity plasma active groups, promote combustion to be more sufficient, improve combustion efficiency and reduce pollution emission.)

1. A fuel oil atomizing nozzle with a sliding arc plasma-high disturbance cross structure is characterized by comprising a tungsten electrode, an inner shell, an outer shell and an end cover, wherein the end cover is positioned at the top of the inner shell, an air inlet cavity a is arranged in the inner shell, and a swirler a is arranged at the bottom of the air inlet cavity a; an air inlet pipeline a communicated with the air inlet cavity a is arranged on one side of the inner shell, an oil inlet pipeline is arranged on the other side of the inner shell, the oil inlet pipeline is communicated with the top of the oil inlet cavity, the bottom of the oil inlet cavity is respectively connected with an inclined downward channel a and an inclined downward arc-shaped channel b, cross spray holes are formed in the end portions of the channel a and the channel b and are communicated with an atomizing ignition region, the atomizing ignition region is communicated with a sliding arc discharge region on the atomizing ignition region, the sliding arc discharge region is located below the swirler a, and a tungsten electrode sequentially penetrates through the end cover, the air inlet cavity a and the swirler a to extend into the sliding arc; the outer shell is connected to the periphery of the lower portion of the inner shell, a space formed by the inner shell and the outer shell is an air inlet cavity b, an air inlet pipeline b communicated with the air inlet cavity b is arranged on one side of the outer shell, a cyclone b is arranged on the upper portion of the air inlet cavity b, and the bottom of the air inlet cavity b is communicated with the atomization ignition region.

2. The fuel atomizing nozzle of claim 1, wherein the top of the tungsten electrode is exposed, and the bottom of the tungsten electrode in the discharge area of the sliding arc is distributed with small protrusions in a spiral arrangement.

3. The fuel atomizing nozzle of claim 2, wherein the tungsten electrode is connected with a plasma power positive electrode as a high-voltage electrode, and the tungsten electrode is fixedly connected with the end cover and the swirler a in a threaded manner.

4. The sliding arc plasma-high disturbance cross structural fuel atomizing nozzle of claim 1, wherein said end cap includes a top cap and a boss connected, said boss is screwed into an inner housing, and a top end face of said inner housing is in contact with said top cap; the end cover is made of insulating materials, grooves are formed in the top and the bottom of the end cover respectively, metal positioners are arranged in the grooves, and the vertical positions of the tungsten electrodes are positioned and adjusted through the metal positioners.

5. The fuel atomizing nozzle of claim 1, wherein the intersecting orifice is a plurality of intersecting orifices arranged circumferentially.

6. The fuel atomizing nozzle of claim 1, wherein the contact portion of the swirler a with the tungsten electrode is made of an insulating material.

7. The sliding arc plasma-high disturbance cross structural fuel atomizing nozzle according to claim 1, wherein said inner housing is a cylindrical structure, the bottom of which extends obliquely downward and inward; the outer shell is in a round platform structure with a narrow upper part and a wide lower part.

8. The sliding arc plasma-high disturbance cross structural fuel atomizing nozzle of claim 7, wherein said inner and outer housings are made of metal material and are grounded.

9. The fuel atomizing nozzle of claim 1, wherein the air inlet pipeline a, the oil inlet pipeline, the oil inlet cavity, the channel a and the channel b are all formed on the inner shell.

Technical Field

The invention relates to the technical field of fuel atomizing nozzles, in particular to a fuel atomizing nozzle with a sliding arc plasma-high disturbance cross structure.

Background

Nowadays, with the continuous development of engine technology, higher requirements are put forward on the characteristics of reliable ignition, efficient combustion, low pollution emission and the like of a combustion chamber. Studies have shown that the quality of fuel atomization directly affects the fuel combustion process and the formation of pollutants. Therefore, the improvement of the atomization quality and the enhancement of the regulation and control of the atomization flow field become important points of attention of people. At present, people generally adopt an optimized nozzle structure to optimize the fuel spraying process by means of electrostatic spraying, an external strong electric field, a magnetic field and the like. In recent years, a large number of domestic and foreign researchers apply the plasma excitation technology to the fuel oil atomization flow field of the engine due to the fact that the plasma excitation technology has the capabilities of disturbing the flow field, improving the reaction activity and reducing the emission.

However, the existing plasma fuel atomizing nozzles are relatively complex in structure, and generally adopt dielectric barrier discharge to ionize a fuel spray field. The discharge characteristics of dielectric barrier discharge determine that the discharge gap is small, so that the ionization of liquid fuel with wide range and large flow rate is difficult to realize, and meanwhile, as fuel oil flows through a metal nozzle, the active particles are inactivated.

Disclosure of Invention

In order to solve the problems that the existing plasma fuel oil atomizing nozzle is complex in structure, narrow in processing range, easy in inactivation of active particles during ignition and difficult in realization of ionization of liquid fuel with large flow, the application provides a fuel oil atomizing nozzle with a sliding arc plasma-high disturbance cross structure.

In order to achieve the purpose, the technical scheme of the application is as follows: a fuel oil atomizing nozzle with a sliding arc plasma-high disturbance cross structure comprises a tungsten electrode, an inner shell, an outer shell and an end cover, wherein the end cover is positioned at the top of the inner shell, an air inlet cavity a is arranged in the inner shell, and a swirler a is arranged at the bottom of the air inlet cavity a; an air inlet pipeline a communicated with the air inlet cavity a is arranged on one side of the inner shell, an oil inlet pipeline is arranged on the other side of the inner shell, the oil inlet pipeline is communicated with the top of the oil inlet cavity, the bottom of the oil inlet cavity is respectively connected with an inclined downward channel a and an inclined downward arc-shaped channel b, cross spray holes are formed in the end portions of the channel a and the channel b and are communicated with an atomizing ignition region, the atomizing ignition region is communicated with a sliding arc discharge region on the atomizing ignition region, the sliding arc discharge region is located below the swirler a, and a tungsten electrode sequentially penetrates through the end cover, the air inlet cavity a and the swirler a to extend into the sliding arc; the outer shell is connected to the periphery of the lower portion of the inner shell, a space formed by the inner shell and the outer shell is an air inlet cavity b, an air inlet pipeline b communicated with the air inlet cavity b is arranged on one side of the outer shell, a cyclone b is arranged on the upper portion of the air inlet cavity b, and the bottom of the air inlet cavity b is communicated with the atomization ignition region.

Furthermore, the top of the tungsten electrode is exposed outside, and small bulges which are spirally arranged are distributed at the bottom end of the tungsten electrode positioned in the sliding arc discharge area.

Furthermore, the tungsten electrode is used as a high-voltage electrode and is connected with the positive electrode of the plasma power supply, and the tungsten electrode is fixedly connected with the end cover and the cyclone a in a threaded connection mode.

Further, the end cover comprises a top cover and a boss which are connected, the boss is screwed into the inner shell through threads, and the top end face of the inner shell is in contact with the top cover; the end cover is made of insulating materials, grooves are formed in the top and the bottom of the end cover respectively, metal positioners are arranged in the grooves, and the vertical positions of the tungsten electrodes are positioned and adjusted through the metal positioners.

Furthermore, the crossed spray holes are a plurality of crossed holes which are arranged in the circumferential direction.

Furthermore, the contact part of the swirler a and the tungsten electrode is made of insulating materials.

Furthermore, the inner shell is of a cylindrical structure, and the bottom of the inner shell extends obliquely downwards and inwards; the outer shell is in a round platform structure with a narrow upper part and a wide lower part.

As a further step, the inner shell and the outer shell are made of metal materials and are grounded.

As a further step, the air inlet pipeline a, the oil inlet pipeline, the oil inlet cavity, the channel a and the channel b are all arranged on the inner shell.

Due to the adoption of the technical scheme, the invention can obtain the following technical effects: the fuel oil atomizing nozzle with the sliding arc plasma-high disturbance cross structure provides larger ignition energy when high-energy ignition is needed, and has the advantages of high energy and good ignition reliability; after the engine is ignited successfully, high-activity plasma active groups can be continuously and stably provided, combustion is promoted more sufficiently, combustion efficiency is improved, and pollutant emission is reduced; the defect of dielectric barrier discharge is avoided, and large-flow fuel oil treatment can be realized.

Drawings

The invention has the following figures 3:

FIG. 1 is a cross-sectional view of a fuel atomizing nozzle according to the present application;

FIG. 2 is a schematic illustration of the injection and ionization process of the fuel atomizing nozzle of the present application;

FIG. 3 is a flow chart of a method of controlling a fuel atomizing nozzle according to the present application.

The sequence numbers in the figures illustrate: 1-metal locator, 2-air inlet cavity a, 3-tungsten electrode, 4-oil inlet pipeline, 5-air inlet cavity b, 6-oil inlet cavity, 7-swirler b, 8-cross spray hole, 9-swirler a, 10-air inlet pipeline b, 11-air inlet pipeline a, 12-inner shell, 13-end cover, 14-fuel oil, 15-sliding arc, 16-atomization ignition region, 17-air and 18-excitation gas.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples: the present application is further described by taking this as an example.