CN212903808U - Ejector and wind tunnel test device with same - Google Patents
Ejector and wind tunnel test device with same Download PDFInfo
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- CN212903808U CN212903808U CN202021649789.0U CN202021649789U CN212903808U CN 212903808 U CN212903808 U CN 212903808U CN 202021649789 U CN202021649789 U CN 202021649789U CN 212903808 U CN212903808 U CN 212903808U
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Abstract
The utility model relates to an ejector and be equipped with wind-tunnel test device of this ejector. The method comprises the following steps: the air source access pipeline is communicated with the connecting pipeline, the connecting pipeline is communicated with the annular pipeline, a plurality of air outlet pipelines are evenly communicated with the annular pipeline at intervals, and the air outlet pipelines are communicated with the pipeline of the wind tunnel test device. In the embodiment of the disclosure, an external air source is connected into the ejector to replace an original wind tunnel fan section, so that a large high-speed airflow can be generated, the ejector comprises an annular pipeline, and a plurality of air outlet pipelines are uniformly communicated with each other at intervals on the annular pipeline, so that uniform ejection airflow can be generated.
Description
Technical Field
The utility model relates to a wind-tunnel experiment technical field especially relates to an ejector and be equipped with wind-tunnel test device of this ejector.
Background
Wind tunnel tests are the most common and effective component for aerodynamic tests, in which a flow of air is generated and controlled manually to simulate the flow of air around an aircraft or a body. With the development of industrial aerodynamics, the air-conditioning system is widely applied to the fields of transportation, building construction, wind energy utilization and the like.
The wind tunnel can be divided into a low-speed wind tunnel (Ma is less than or equal to 0.4), a high-speed wind tunnel (Ma is 0.4-4.5) and a hypersonic wind tunnel (Ma is more than or equal to 5.0) according to the air flow speed of the wind tunnel test section. In the related art, the airflow generated by the high-speed wind tunnel is not uniform enough, and the higher test requirement is difficult to meet.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an ejector and be equipped with wind-tunnel test device of this ejector.
According to the utility model discloses a first aspect provides an ejector.
The method comprises the following steps: the air source access pipeline is communicated with the connecting pipeline, the connecting pipeline is communicated with the annular pipeline, a plurality of air outlet pipelines are evenly communicated with the annular pipeline at intervals, and the air outlet pipelines are communicated with the pipeline of the wind tunnel test device.
In one possible implementation, the plurality of outlet pipes are located on the same side of the annular pipe.
In a possible implementation, the number of connecting pipes comprises an even number.
In one possible implementation, an even number of the connecting pipes are symmetrically connected to the annular pipe.
In a possible implementation manner, the tail end of the air outlet pipeline is connected with an injection nozzle, and the injection nozzles are uniformly arranged on the circumferential inner wall of the pipeline at intervals.
In a possible implementation manner, the gas source access pipeline is sequentially provided with a stop valve, a quick valve and a regulating valve along the direction of gas source entering.
In a possible implementation manner, the gas source access pipeline is communicated with a high-pressure gas source.
According to a second aspect of the present disclosure, there is provided a wind tunnel test device comprising:
the ejector according to any one of the embodiments of the present invention;
the ejector is communicated with the air mixing chamber, the diffusion section, the stabilization section, the contraction section and the test section in sequence.
In a possible implementation manner, an anechoic section is further arranged between the diffusion section and the stable section.
In a possible implementation manner, at least one or more of a silencer, a silencing lining and silencing cotton is/are arranged in the silencing section.
The utility model discloses beneficial effect includes: in the embodiment of the disclosure, the air source access pipeline is communicated with an external air source, the air source comprises a high-pressure airflow source, and the generated airflow sequentially passes through the air source access pipeline, the connecting pipeline, the annular pipeline and the air outlet pipeline to enter the pipeline of the wind tunnel test device, and is mixed in the pipeline to form uniform airflow. In the embodiment of the disclosure, an external air source is connected into the ejector to replace an original wind tunnel fan section, so that a large high-speed airflow can be generated, the ejector comprises an annular pipeline, and a plurality of air outlet pipelines are uniformly communicated with each other at intervals on the annular pipeline, so that uniform ejection airflow can be generated.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of an ejector according to an exemplary embodiment.
Fig. 2 is a schematic diagram of an eductor in accordance with an exemplary embodiment.
Fig. 3 is a schematic diagram of an eductor in accordance with an exemplary embodiment.
FIG. 4 is a schematic diagram of a wind tunnel test rig according to an exemplary embodiment.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Fig. 1 to 3 are schematic structural views of an ejector according to an exemplary embodiment. As shown with reference to figures 1 to 3,
an eductor, comprising: the air source access pipeline 4 is communicated with the connecting pipeline 5, the connecting pipeline 5 is communicated with the annular pipeline 6, a plurality of air outlet pipelines 7 are evenly communicated on the annular pipeline 6 at intervals, and the air outlet pipelines 7 are communicated with the pipeline 1 of the wind tunnel test device.
In the embodiment of the disclosure, the air source access pipeline 4 is communicated with an external air source, the air source comprises a high-pressure air flow source, the generated air flow sequentially passes through the air source access pipeline 4, the connecting pipeline 5, the annular pipeline 6 and the air outlet pipeline 7 to enter the pipeline 1 of the wind tunnel test device, and the air flow is mixed in the pipeline 1 to form uniform air flow. In the embodiment of the disclosure, an external air source is connected into the ejector to replace an original wind tunnel fan section, so that a large high-speed airflow can be generated, the ejector comprises an annular pipeline, and a plurality of air outlet pipelines are uniformly communicated with each other at intervals on the annular pipeline, so that uniform ejection airflow can be generated.
In a possible implementation, the plurality of outlet ducts 7 are located on the same side of the annular duct 6. The air outlet pipeline is positioned at the same side and is relatively centralized, so that the energy loss of an air source can be reduced.
In a possible implementation manner, the number of the connecting pipes 5 includes an even number, and the even number of the connecting pipes 5 are symmetrically connected to the annular pipe 6. The even number of connecting pipelines are connected to the annular pipeline in a bilateral symmetry mode to transmit bilateral symmetry airflow, and uniformity of the airflow is facilitated.
In a possible implementation manner, the tail end of the air outlet pipeline is connected with an injection nozzle, and the injection nozzles are uniformly arranged on the circumferential inner wall of the pipeline at intervals. The distances from the injection nozzles to the center of the pipeline are the same, and the distances from the plurality of injection nozzles to the center of the pipeline are the same. A uniform airflow can be generated.
In one possible implementation, the gas source access pipe 4 is provided with a stop valve, a quick valve and a regulating valve in sequence along the direction in which the gas source enters, so that the gas flow can be opened or closed, and the flow rate of the gas flow can be controlled.
In a possible implementation mode, a diffuser is arranged behind the air mixing chamber to reduce the flow speed and increase the static pressure.
FIG. 4 is a schematic diagram of a wind tunnel test rig according to an exemplary embodiment. Referring to fig. 4, the method includes:
the ejector of any one of the utility model;
the ejector is sequentially communicated with the air mixing chamber 8, the diffusion section 9, the stabilizing section 10, the contraction section 11 and the test section 12.
The main function of the diffuser section in the disclosed embodiment is to convert the kinetic energy of the airflow into pressure energy, and simultaneously reduce the energy loss of the airflow at each section downstream of the diffuser section. The area diffusion ratio and the diffusion angle of the diffusion section are optimally configured, so that the flow separation in the diffusion section is avoided as much as possible, the pressure loss in the diffusion section is reduced, and the pressure recovery efficiency of the diffusion section is improved.
In the disclosed embodiment, the stabilizing section contains a honeycomb device and a damping net rectifying device, and the main function of the stabilizing section is to provide uniform inlet airflow with good directivity and attenuated turbulence pulsation for the contraction section. The section size of the stable section is the same as that of the inlet of the contraction section, the length of the stable section firstly needs to ensure the space required by the rectifying device in the stable section, and secondly needs a static flow section with a certain length, so that turbulence pulsation behind the damping net can be continuously attenuated, and meanwhile, the anisotropy of the turbulence pulsation can be improved. The stabilizing section is positioned at the downstream of the air inlet silencing section, the width of the cross section is 2.4m, the height of the cross section is 2.4m, the length of the cross section is 3m, and a honeycomb device and five layers of damping nets are arranged in the stabilizing section. The honeycomb device is composed of stainless steel thin-wall regular hexagon units, the distance between the opposite sides of the units is 5mm, the length-diameter ratio is 20, and the unit length is 100 mm. 5 layers of damping nets with the same specification are installed behind the honeycomb device, the number of the damping nets is 16, the diameter of each net wire is 0.315mm, and the opening rate is about 64%. The damping net can be integrally disassembled and cleaned or replaced. And an air flow total temperature and total pressure measuring point is arranged in the rear static flow section of the stabilizing section damping net.
In the embodiment of the disclosure, the contraction section mainly functions to accelerate the airflow to reach the speed required by the test. According to the technical requirements given for the dimensions of the stabilization section and the test section, the contraction ratio of the contraction section is 36, the inlet section dimension is 2.4m wide and 2.4m high, the outlet section characteristic dimension is 0.4m wide and 0.4m high and 3.3m long, wherein the profile section is 3.2m and the outlet straight section is 0.1 m. The shrinkage section profile adopts a bicubic curve.
In the embodiment of the disclosure, the wind tunnel is provided with a closed test section and an open test section according to test requirements. The length of the closed test section is 1.5m, the inlet dimension is 0.4m in width, the height is 0.4m, the outlet dimension is 0.412m in width and 0.4m in height, and the left side wall and the right side wall are slightly expanded so as to reduce the influence of a boundary layer on the axial static pressure gradient. For the change of conveniently opening, the experimental section of closing a mouthful, be anterior segment and back end with the split of first diffuser section, the anterior segment is 1300mm long, removable collector when being the opening experiment. The side wall of the closed test section is provided with an observation window which can be rapidly disassembled, and the upper wall and the lower wall are provided with turntables which can be manually rotated. The closed test section and the front expansion section are detached, and the collector is installed to form the open test section. The bottom of the replacing section (the closed test section, the first expanding front section, the collector and the like) is provided with a roller and a guide rail, so that the disassembly, the assembly and the replacement are convenient. The straight section of the outlet of the contraction section is equivalent to the nozzle of the opening test section, the size of the nozzle is 0.4m in width and 0.4m in height, the length of the test section is 1.5m, the opening degree of the inlet of the collector is 0.85m in width and 0.85m in height, and the length of the inlet of the collector is 1.16 m.
In a possible implementation manner, an anechoic section is further arranged between the diffusion section and the stable section, and at least one or more of a silencer, an anechoic lining and silencing cotton is/are arranged in the anechoic section. The muffling segment is arranged at the downstream of the second diffusion segment, the sizes of an inlet and an outlet are 1.2m in width, 1.4m in height and 3m in length, the sheet type mufflers are arranged in the muffling segment, and the total muffling amount is not less than 30 dB. The outlet of the silencing section is provided with a shutter and a safety protection net.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An ejector, comprising: air supply access pipeline (4), air supply access pipeline (4) are linked together with connecting tube (5), connecting tube (5) are linked together with annular duct (6), evenly communicate a plurality of outlet duct (7) at the interval on annular duct (6), outlet duct (7) are linked together with pipeline (1) of wind tunnel test device.
2. The ejector according to claim 1, wherein the plurality of outlet ducts (7) are located on the same side of the annular duct (6).
3. The ejector according to claim 1, characterized in that the number of connecting ducts (5) comprises an even number.
4. The ejector according to claim 3, wherein an even number of the connecting pipes (5) are connected to the annular pipe (6) in a left-right symmetrical manner.
5. The ejector according to claim 1, wherein the end of the air outlet pipe (7) is connected with ejector nozzles, the ejector nozzles are uniformly arranged on the circumferential inner wall of the pipe (1) at intervals, and the distances from the plurality of ejector nozzles to the center of the pipe (1) are the same.
6. The injector according to claim 1, characterized in that the gas source access pipe (4) is provided with a stop valve, a quick valve and a regulating valve in sequence along the gas source inlet direction.
7. The injector according to claim 1, characterized in that the gas source access duct (4) is in communication with a high-pressure gas source.
8. A wind tunnel test device, comprising: the eductor of any one of claims 1-6; the ejector is sequentially communicated with the air mixing chamber (8), the diffusion section (9), the stabilizing section (10), the contraction section (11) and the test section (12).
9. The wind tunnel test device of claim 8, wherein an anechoic section is further provided between the diffuser section and the stabilizing section.
10. The wind tunnel test device according to claim 9, wherein at least a silencer is arranged in the silencing section, and the silencer comprises a silencing lining and silencing cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021649789.0U CN212903808U (en) | 2020-08-11 | 2020-08-11 | Ejector and wind tunnel test device with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021649789.0U CN212903808U (en) | 2020-08-11 | 2020-08-11 | Ejector and wind tunnel test device with same |
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| CN212903808U true CN212903808U (en) | 2021-04-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049210A (en) * | 2021-06-01 | 2021-06-29 | 中国航空工业集团公司沈阳空气动力研究所 | Measuring system for air flow energy mixing |
| CN113945355A (en) * | 2021-09-21 | 2022-01-18 | 中国航空工业集团公司西安飞机设计研究所 | Air inlet duct wind tunnel test simulation system under shock wave |
-
2020
- 2020-08-11 CN CN202021649789.0U patent/CN212903808U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049210A (en) * | 2021-06-01 | 2021-06-29 | 中国航空工业集团公司沈阳空气动力研究所 | Measuring system for air flow energy mixing |
| CN113945355A (en) * | 2021-09-21 | 2022-01-18 | 中国航空工业集团公司西安飞机设计研究所 | Air inlet duct wind tunnel test simulation system under shock wave |
| CN113945355B (en) * | 2021-09-21 | 2024-01-30 | 中国航空工业集团公司西安飞机设计研究所 | Air inlet channel wind tunnel test simulation system under shock wave |
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