CN213121979U - Tracer particle feeding device for gas phase fluid - Google Patents
Tracer particle feeding device for gas phase fluid Download PDFInfo
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- CN213121979U CN213121979U CN202021464380.1U CN202021464380U CN213121979U CN 213121979 U CN213121979 U CN 213121979U CN 202021464380 U CN202021464380 U CN 202021464380U CN 213121979 U CN213121979 U CN 213121979U
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Abstract
The utility model discloses a tracer particle throwing device for gas phase fluid, which comprises a main pipeline, a mixed gas pipeline with one end positioned in the main pipeline, a conical mixer fixedly connected with the other end of the mixed gas pipeline positioned outside the main pipeline, an air inlet pipe fixedly connected with the bottom of the mixer, a valve arranged on the air inlet pipe, a tracer particle inlet pipe fixedly connected with the mixer, and an included angle between the air inlet pipe and the tracer particle inlet pipe; the utility model discloses can realize that the high speed of tracer particle is brought into and tracer particle and fluid homogeneous mixing to control the concentration of tracer particle in the main fluid, thereby guarantee granule image speed measuring result's precision.
Description
Technical Field
The utility model relates to a tracer particle drops into device for gaseous phase fluid.
Background
Flow display and flow field measurement problems have long been problematic. The flow display technique is a technique of applying a certain substance in a transparent or translucent fluid medium to make a flow visible by an optical action or the like. The flow display technology is the most intuitive and effective means for researching the basic flow phenomenon, knowing the flow characteristics and deeply exploring the physical mechanism thereof, and is always paid attention to by people in the research of fluid mechanics to play an important role. At present, various technologies exist for measuring the infrared radiation film type ultrasonic sensor, wherein the infrared radiation film type ultrasonic sensor and the laser Doppler type ultrasonic sensor are limited to single-point measurement technologies, and the infrared radiation film type ultrasonic sensor is also in contact type measurement, so that the influence on a flow field is great. Compared with the image measurement technology, the laser measurement technology is a full flow field velocity measurement technology, and the obtained result comprises various physical information, such as a streamline atlas, a vorticity field and the like.
The PIV (particle image velocity) technology is an application of a typical full flow field velocity measurement technology, and the basic principle is that proper tracer particles are spread in a flow field, a pulse laser sheet is used for irradiating a section area of the measured flow field, a particle image of two or more exposures is shot through an imaging recording system to form a PIV negative, the average displacement of a particle image in a small area of each interpretation point is obtained, and therefore the two-dimensional velocity of multiple points on the section of the flow field is determined. The working process of the PIV system mainly comprises the following stages of tracer particle scattering, film light source scattering, camera shooting, image processing and the like. Wherein, the scattering of the tracer particles is very important for subsequent result processing, the tracer particles are too dense, the particle images can be overlapped, and laser speckles rather than independent particle images are formed on the images; if the concentration of the trace particles is too low, the flow velocity of a sufficient number of points in the flow field cannot be obtained, and thus, a sufficiently accurate flow velocity distribution cannot be obtained. Therefore, the reasonable putting of the trace particles is a key of PIV measurement, and the accuracy of the PIV technical measurement is influenced. At present, no equipment capable of regulating and controlling the quantity of trace particles and the mixing uniformity entering a main fluid pipeline exists in the market.
Disclosure of Invention
The utility model aims at the above-mentioned not enough of prior art, provide a gaseous phase fluidic tracer particle drops into device, it can realize that the high speed of tracer particle brings into and tracer particle and fluid homogeneous mixing to control the concentration of tracer particle in the main fluid, thereby guarantee granule image speed measuring result's precision.
In order to achieve the above object, the utility model discloses a gaseous phase fluidic spike particle drops into device, be located the mixed gas road pipe of trunk line, characterized in that including trunk line, one end: the other end of the mixed gas path pipe outside the main pipeline is fixedly connected with a conical mixer, the bottom of the mixer is fixedly connected with an air inlet pipe, the air inlet pipe is provided with a valve, the mixer is fixedly connected with a trace particle inlet pipe, and the air inlet pipe and the trace particle inlet pipe are arranged at an included angle;
when the particle image velocity measuring device is used, the tracer particles and the compressed air respectively enter the mixer, the tracer particles and the compressed air form rotational flow type mixing, high-speed fluid is formed and is sprayed out of the main pipeline, and due to the fact that the tracer particles and the compressed air enter at a certain speed, the tracer particles and the fluid can be mixed uniformly easily in a turbulent flow state, high-speed entrainment of the tracer particles and uniform mixing of the tracer particles and the fluid can be achieved, and accuracy of a particle image velocity measuring result is guaranteed;
as a further improvement of the utility model, the port surface of the mixed gas path pipe positioned in the main pipeline is vertical to the axis of the main pipeline; the tracer particle airflow is favorably scattered in the main pipeline, and the mixing uniformity is improved;
as a further improvement of the utility model, the mixed gas pipeline is connected with a shunt pipe which is provided with a valve; the concentration of the trace particles in the main fluid can be controlled through the shunt pipe;
as a further improvement of the utility model, the included angle between the air inlet pipe and the trace particle inlet pipe is 40-50 degrees; better rotational flow mixing can be formed;
to sum up, the utility model discloses can realize that the high speed of tracer particle is brought into and tracer particle and fluid homogeneous mixing to control the concentration of tracer particle in the main fluid, thereby guarantee granule image speed measuring result's precision.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the trace particle throwing device for phase fluid according to this embodiment includes a main pipe 1, and a mixed gas path pipe 7 having one end located in the main pipe 1, wherein a port face 9 of the mixed gas path pipe 7 located in the main pipe 1 is perpendicular to an axis of the main pipe 1, the other end of the mixed gas path pipe 7 located outside the main pipe 1 is fixedly connected to a conical mixer 3, an air inlet pipe 8 is fixedly connected to the bottom of the mixer 3, a valve 4 is disposed on the air inlet pipe 8, the mixer 3 is fixedly connected to a trace particle inlet pipe 5, and the air inlet pipe 8 and the trace particle inlet pipe 5 form an included angle of 40-50 degrees; a shunt pipe 6 is connected on the mixed gas path pipe 7, and a valve 2 is arranged on the shunt pipe 6;
when the device is used, tracer particles and compressed air respectively enter the mixer 3 through the tracer particle inlet pipe 5 and the tracer particle inlet pipe 5, the included angle between the tracer particles and the compressed air and the conical mixer 3 can form rotational flow type mixing to form high-speed fluid to be sprayed to the main pipeline 1, and the high-speed fluid and the main fluid can be more easily and uniformly mixed in a turbulent flow state due to the fact that the tracer particles enter at a certain speed, so that the high-speed introduction of the tracer particles and the uniform mixing of the tracer particles and the fluid can be realized, and the accuracy of a particle image speed measurement result is ensured; the port surface 9 is vertical to the axis of the main pipeline 1, so that the tracer particle airflow can be favorably scattered in the main pipeline 1, and the mixing uniformity is improved;
if the concentration of the trace particles in the subject fluid is found to be high through the subsequent detection, the concentration of the trace particles in the subject fluid can be controlled through the shunt tube 6 and the valve 2.
Claims (4)
1. The utility model provides a tracer particle of gaseous phase fluid drops into device, includes that trunk line, one end are located the mixed gas way pipe of trunk line, its characterized in that: the other end of the mixed gas pipeline positioned outside the main pipeline is fixedly connected with a conical mixer, the bottom of the mixer is fixedly connected with an air inlet pipe, a valve is arranged on the air inlet pipe, the mixer is fixedly connected with a trace particle inlet pipe, and the air inlet pipe and the trace particle inlet pipe are arranged at an included angle.
2. The tracer particle feeding apparatus for gas-phase fluid according to claim 1, wherein: the port surface of the mixed gas pipeline positioned in the main pipeline is vertical to the axis of the main pipeline.
3. A tracer particle feeding apparatus for gas-phase fluid according to claim 1 or 2, wherein: the mixed gas pipeline is connected with a shunt pipe, and a valve is arranged on the shunt pipe.
4. The tracer particle feeding apparatus for gas-phase fluid according to claim 3, wherein: the air inlet pipe and the tracer particle inlet pipe form an included angle of 40-50 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021464380.1U CN213121979U (en) | 2020-07-23 | 2020-07-23 | Tracer particle feeding device for gas phase fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021464380.1U CN213121979U (en) | 2020-07-23 | 2020-07-23 | Tracer particle feeding device for gas phase fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213121979U true CN213121979U (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021464380.1U Active CN213121979U (en) | 2020-07-23 | 2020-07-23 | Tracer particle feeding device for gas phase fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213121979U (en) |
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2020
- 2020-07-23 CN CN202021464380.1U patent/CN213121979U/en active Active
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