CN113432831B - Integrated experimental device and experimental method for vortex entrainment phenomenon research - Google Patents
Integrated experimental device and experimental method for vortex entrainment phenomenon research Download PDFInfo
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- CN113432831B CN113432831B CN202110657045.6A CN202110657045A CN113432831B CN 113432831 B CN113432831 B CN 113432831B CN 202110657045 A CN202110657045 A CN 202110657045A CN 113432831 B CN113432831 B CN 113432831B
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Abstract
An integrated experimental device and an experimental method for researching vortex entrainment phenomena are disclosed, wherein the device comprises a test section, a water inlet flowmeter, a water pumping flowmeter, a water inlet pump, a water pumping pump, a water tank, a double-branch closed loop consisting of a pipeline and a pipeline accessory, a loop supporting frame and a distribution box. The test section is a rectangular container and consists of an inlet section, a vortex generation section and an outlet section. The vortex generating section has two ends separated by partition board into parallel flow channels, one flow channel with two ends connected to the inlet section and the outlet section and the other flow channel with two ends of closed wall. The bottom of the center of the vortex generation section is provided with a vertically downward water pumping port. The loop supporting frame is used for fixing the double-branch closed loop and the distribution box. The experimental device can simulate vortex entrainment and realize direct observation and shooting record of the phenomenon, can be used for researching the generation mechanism of the vortex entrainment phenomenon of the fast reactor sodium pool, and is compact in integrated arrangement mode, so that the experimental land is reduced, the movement is easy, and the experimental research is convenient to carry out under different conditions.
Description
Technical Field
The invention belongs to the field of nuclear science and technology, particularly relates to the field of safety research of sodium-cooled fast reactors, and relates to an integrated experimental device and an experimental method for researching a vortex entrainment phenomenon.
Technical Field
Sodium-cooled fast reactors have outstanding advantages in terms of nuclear fuel proliferation, long-lived actinide transmutation and intrinsic safety, as well as a rich operating experience and technical accumulation, and have been considered as one of the most promising types of nuclear reactors of the fourth generation. When the coolant in the sodium pool has a certain horizontal flow velocity and a larger local downward velocity, the phenomenon of vortex entrained gas can be generated, and the safe operation of the reactor is seriously threatened. For economic reasons, fast reactors are relatively compact in construction, and the compact design increases coolant flow rate and thus the probability of vortex formation. The free liquid level of the pool type sodium-cooled fast reactor is far larger than that of the loop type fast reactor, vortex is easy to generate, and the structure of a primary pump, an intermediate heat exchanger, an air direct cooler and the like immersed in the sodium pool enables the coolant to flow around and further aggravate the phenomenon. Therefore, in order to ensure the safety level of the fast reactor, the vortex entrainment phenomenon needs to be studied deeply to find the occurrence mechanism. The invention provides an integrated experimental device for researching a vortex entrainment phenomenon formally based on the requirement, and aims to solve the problems that water is used as an experimental medium to simulate the vortex entrainment phenomenon and a movable integrated experimental device is arranged in a limited space.
Disclosure of Invention
In order to solve the problems, the invention provides an integrated experimental device and an experimental method for researching a vortex entrainment phenomenon, which can realize integrated compact arrangement on the premise of meeting experimental requirements.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an integrated experimental device for researching vortex entrainment phenomenon comprises a test section 10, a water inlet flowmeter 19, a water pumping flowmeter 20, a water inlet pump 18, a water pumping pump 21, a double-branch closed loop consisting of a water tank 1, a pipeline and pipeline accessories, a loop supporting frame 2 and a distribution box 22; the test section 10 is a rectangular container and consists of an inlet section 6, a vortex generation section 8 and an outlet section 11 which are communicated in sequence; the inlet section 6 comprises a reducing section 17 and a developing section 16 which are communicated, and a flow straightener 7 is arranged in the developing section 16; the two ends of the vortex generation section 8 are respectively divided into two parallel flow channels by a partition plate 15 along the center line, the two ends of one flow channel are respectively connected with the inlet section 6 and the outlet section 11, and the two ends of the other flow channel are closed wall surfaces; the bottom of the center of the vortex generation section 8 is provided with a water pumping port 9 which faces downwards vertically; the outlet section 11 comprises a buffer section 14 and a divergent section 13 which are communicated;
the water pumping port 9 is sequentially connected with a water pumping flowmeter 20, a water pumping pump 21 and the water tank 1 through pipelines to form a branch closed loop; the water tank 1 is sequentially connected with a water inlet pump 18, a thermometer 5, a water inlet flowmeter 19 and an inlet section 6 by pipelines; the outlet section 11 is connected to the water tank 1 to form another branch closed loop; the bottom of the water tank 1 is provided with a drain valve 12.
Optionally, the water tank 1 is connected with the water inlet pump 18 and the water suction pump 21 by metal hoses 3.
Optionally, the loop support frame 2 is divided into an upper layer and a lower layer, the upper layer is used for fixing the test section 10, the water inlet flowmeter 19 and the water pumping flowmeter 20, and the lower layer is used for fixing the water tank 1, the water inlet pump 18, the water pumping pump 21 and the distribution box 22; and the bottom of the loop supporting frame 2 is provided with a universal caster 4 with a brake.
Optionally, the flow straightener 7 consists of a set of orifice plates.
Optionally, the material of the test segment 10 is acrylic plastic.
Compared with the prior art, the invention has the following advantages:
1. the experimental device can simulate vortex entrainment and realize direct observation and shooting record of the phenomenon, and is an experimental device for researching the generation mechanism and the thermal characteristics of the vortex entrainment phenomenon of the fast reactor sodium pool.
2. The experimental device can be built in a limited space, and the compact arrangement mode reduces the occupied area of the experimental device.
3. The experimental device disclosed by the invention is easy to move due to the integrated structure, and is convenient for experimental research under different conditions.
Drawings
FIG. 1 is a front view of the apparatus of the present invention.
FIG. 2 is a top view of the apparatus of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the following detailed description is made in combination with the attached drawings and the specific embodiments:
as shown in fig. 1 and 2, an integrated experimental apparatus for vortex entrainment phenomenon research includes a test section 10, a water inlet flowmeter 19, a water pumping flowmeter 20, a water inlet pump 18, a water pumping pump 21, a double-branch closed loop formed by a water tank 1 and a pipeline accessory, a loop support frame 2 and a distribution box 22; the test section 10 is a rectangular container and consists of an inlet section 6, a vortex generation section 8 and an outlet section 11 which are communicated in sequence; the inlet section 6 comprises a reducing section 17 and a developing section 16 which are communicated, and a flow straightener 7 is arranged in the developing section 16; the two ends of the vortex generation section 8 are respectively divided into two parallel flow channels by a partition plate 15 along the center line, the two ends of one flow channel are respectively connected with the inlet section 6 and the outlet section 11, and the two ends of the other flow channel are closed wall surfaces; the bottom of the center of the vortex generation section 8 is provided with a water pumping port 9 which faces downwards vertically; the outlet section 11 comprises a buffer section 14 and a divergent section 13 which are communicated. The water pumping port 9 is sequentially connected with a water pumping flowmeter 20, a water pumping pump 21 and the water tank 1 through pipelines to form a branch closed loop; the water tank 1 is sequentially connected with a water inlet pump 18, a thermometer 5, a water inlet flowmeter 19 and an inlet section 6 by pipelines to form another branch closed loop; the outlet section 11 is connected to the water tank 1; the bottom of the water tank 1 is provided with a drain valve 12, and the water tank 1 is connected with a water inlet pump 18 and a water suction pump 21 through metal hoses 3.
As shown in fig. 1 and 2, the loop supporting frame 2 is divided into an upper layer and a lower layer, the upper layer is used for fixing the test section 10, the water inlet flowmeter 19 and the water pumping flowmeter 20, and the lower layer is used for fixing the water tank 1, the water inlet pump 18, the water pumping pump 21 and the distribution box 22; and the bottom of the loop supporting frame 2 is provided with a universal caster 4 with a brake.
As shown in fig. 1, the flow straightener 7 consists of a set of orifice plates.
As shown in FIG. 1, the material of the test section 10 is acrylic plastic.
Example one
As shown in fig. 1 and 2, under the driving of the water inlet pump 18, the water in the water tank 1 flows through the thermometer 5, the water inlet flow meter 19 and the inlet section 6 of the test section 10 in sequence along the pipeline, passes through the reducing section 17, and then passes through the developing section 16 at a stable and uniform flow rate under the action of the flow straightener 7. Due to the partition 15, which is divided along the centre line, the water will enter the vortex generation section 8 from one side of the partition, wherein a part of the water flows out from the same side, through the buffer section 14 and the divergent section 13 and back to the tank 1. The other part of water flows out from the vertically downward water pumping port 9 under the driving of the water pumping pump 21, and then returns to the water tank 1 after sequentially passing through the water pumping flowmeter 20 and the water pumping pump 21 along the pipeline. One side of the partition 15 is provided with water flowing through at a constant speed, and the other side is a detention area, so that a uniform tangential speed is formed; the suction opening 9 then creates a large local downward velocity. Under the action of the two velocities, vortices are generated in the middle of the vortex generation section 8, so that vortex entrainment is generated.
Example two
As shown in FIG. 1, after the brakes of the universal casters 4 are released, the integrated experimental device can be moved directly.
The above description is only for the purpose of illustrating the present invention, and the implementation of the present invention will be apparent to those skilled in the art, and the present invention is not limited to the above description. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides an integral type experimental apparatus for vortex entrainment phenomenon research which characterized in that: the system comprises a test section (10), a water inlet flowmeter (19), a water pumping flowmeter (20), a water inlet pump (18), a water pumping pump (21), a double-branch closed loop consisting of a water tank (1), a pipeline and pipeline accessories, a loop supporting frame (2) and a distribution box (22); the test section (10) is a rectangular container and consists of an inlet section (6), a vortex generation section (8) and an outlet section (11) which are sequentially communicated; the inlet section (6) comprises a reducing section (17) and a developing section (16) which are communicated with each other, and a flow straightener (7) is arranged in the developing section (16); two ends of the vortex generation section (8) are respectively divided into two parallel flow channels by a partition plate (15) along a central line, two ends of one flow channel are respectively connected with the inlet section (6) and the outlet section (11), and two ends of the other flow channel are closed wall surfaces; a vertically downward water pumping port (9) is formed in the bottom of the center of the vortex generation section (8); the outlet section (11) comprises a buffer section (14) and a divergent section (13) which are communicated with each other;
the double-branch closed loop comprises the following steps: the water pumping port (9) is sequentially connected with a water pumping flowmeter (20), a water pumping pump (21) and the water tank (1) through pipelines to form a branch closed loop; the water tank (1) is sequentially connected with a water inlet pump (18), a thermometer (5), a water inlet flow meter (19) and an inlet section (6) by pipelines to form another branch closed loop; the outlet section (11) is connected to the water tank (1); the bottom of the water tank (1) is provided with a drain valve (12).
2. The integrated experimental device for researching the vortex entrainment phenomenon as claimed in claim 1, wherein: the loop supporting frame (2) is divided into an upper layer and a lower layer, the upper layer is used for fixing the test section (10), the water inlet flowmeter (19) and the water pumping flowmeter (20), and the lower layer is used for fixing the water tank (1), the water inlet pump (18), the water pumping pump (21) and the distribution box (22); the bottom of the loop supporting frame (2) is provided with a universal caster (4) with a brake.
3. The integrated experimental device for researching the vortex entrainment phenomenon as claimed in claim 1, wherein: the flow straightener (7) consists of a group of pore plates.
4. The integrated experimental device for researching the vortex entrainment phenomenon as claimed in claim 1, wherein: the material of the test section (10) is acrylic plastic.
5. The integrated experimental device for researching the vortex entrainment phenomenon as claimed in claim 1, wherein: the water tank (1) is connected with the water inlet pump (18) and the water suction pump (21) through metal hoses (3).
6. The experimental method of the integrated experimental device for researching vortex entrainment phenomenon as claimed in any one of claims 1 to 5, characterized in that: under the drive of a water inlet pump (18), water in the water tank (1) sequentially flows through a thermometer (5) and a water inlet flow meter (19) along a pipeline and enters an inlet section (6) of the test section (10), and after passing through a reducing section (17), the water passes through a development section (16) at a stable and uniform flow rate under the action of a flow straightener (7); due to the partition plate (15) separated along the center line, water enters the vortex generation section (8) from one side of the partition plate, and part of water flows out from the same side and returns to the water tank (1) after passing through the buffer section (14) and the divergent section (13); the other part of water flows out from a vertically downward water pumping port (9) under the driving of a water pumping pump (21), and then returns to the water tank (1) after sequentially passing through a water pumping flowmeter (20) and the water pumping pump (21) along a pipeline; one side of the partition (15) is provided with water flowing through at a constant speed, and the other side is a detention area, so that a uniform tangential speed is formed; the pumping port (9) forms a large local downward speed; under the action of the two speeds, the vortex is generated in the middle of the vortex generation section (8) so as to cause vortex entrainment.
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Citations (4)
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| JPS4968199A (en) * | 1972-09-13 | 1974-07-02 | ||
| CN101261195A (en) * | 2008-04-23 | 2008-09-10 | 无锡市冠云换热器有限公司 | Heat exchanger performance test stand |
| CN105139746A (en) * | 2015-08-27 | 2015-12-09 | 武汉大学 | Pumping station inlet pool whirlpool experiment bench |
| CN105719708A (en) * | 2016-04-12 | 2016-06-29 | 西安交通大学 | T-shaped tube entrainment test system and method based on fourth-level depressurization system of reactor |
-
2021
- 2021-06-11 CN CN202110657045.6A patent/CN113432831B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4968199A (en) * | 1972-09-13 | 1974-07-02 | ||
| CN101261195A (en) * | 2008-04-23 | 2008-09-10 | 无锡市冠云换热器有限公司 | Heat exchanger performance test stand |
| CN105139746A (en) * | 2015-08-27 | 2015-12-09 | 武汉大学 | Pumping station inlet pool whirlpool experiment bench |
| CN105719708A (en) * | 2016-04-12 | 2016-06-29 | 西安交通大学 | T-shaped tube entrainment test system and method based on fourth-level depressurization system of reactor |
Non-Patent Citations (3)
| Title |
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| AP1000中ADS-4液体夹带模型研究;丁雷等;《原子能科学技术》;20150531;第49卷(第5期);第801-806页 * |
| 竖直向下大、小支管气相夹带起始可视化研究;严睿豪等;《原子能科学技术》;20200131;第54卷(第1期);第53-57页 * |
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