CN210315378U - Ice water two-phase flow water delivery test device - Google Patents
Ice water two-phase flow water delivery test device Download PDFInfo
- Publication number
- CN210315378U CN210315378U CN201920960042.8U CN201920960042U CN210315378U CN 210315378 U CN210315378 U CN 210315378U CN 201920960042 U CN201920960042 U CN 201920960042U CN 210315378 U CN210315378 U CN 210315378U
- Authority
- CN
- China
- Prior art keywords
- water
- ice
- basin
- sub
- test device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The utility model discloses an frozen water two-phase flow water delivery test device belongs to the hydraulic engineering field. The test device comprises: the basin with set for the slope, a controllable diversion mechanism for providing the water source to the high-order end of basin, a current measurement mechanism for measuring the basin water flow that flows through, one side of keeping away from the high-order end in the basin has set gradually sub-simulation pier column group and the baffle tail-gate of adjustable aperture, sub-simulation pier column group includes a plurality of semi-cylindrical and/or columniform sub-simulation pier columns that are located the same cross-section of basin, sub-simulation pier column group top is provided with the camera, the camera is connected with display device, be provided with the water level measurement mechanism who is used for surveying the sub-simulation pier column group section water level on the basin.
Description
Technical Field
The utility model relates to a hydraulic engineering field, concretely relates to frozen water two-phase flow water delivery test device.
Background
The long-distance water delivery project is the most effective and direct means for solving the problem of uneven time-space distribution of water resources. Because the water delivery distance of the water transfer project is generally longer, when the channel passes through the high-latitude areas in winter, the water in the channel dissipates heat to the atmosphere to cause the water temperature to be reduced along the way, and when the water temperature is reduced to be below 0 ℃, the water can generate running ice, and the channel enters the water delivery stage in the ice period. If the channel ice condition is not regulated, ice disasters can be caused. The ice disaster of the long-distance water delivery channel mainly has the following three forms: (1) ice plugs, ice dam floods: a large amount of ice blocks are accumulated in water to form an ice plug and an ice dam, and the water passing section is severely narrowed, so that the water level at the upstream of the section of the ice plug and the ice dam is rapidly increased to cause an embankment; (2) ice blockage: the ice flowers in the water and the floating ice on the water surface are attached to the solid surface, such as a trash rack, a gate and the like, so that the water passing section is reduced or completely blocked; (3) affecting the safety of hydraulic buildings: the floating ice blocks move along with water flow to generate larger impact force, and the expansion force when the ice blocks melt can also damage the buildings contacted with the ice blocks. Therefore, a certain hydraulic regulation and control method is adopted to ensure the operation safety when the water conveying channel operates in the ice period in winter.
The hydraulic regulation and control method provided by developing the research on the ice conveying mechanism of the open channel in the ice water two-phase flow mode has direct significance for guiding safe water conveying in the ice water two-phase flow mode of the channel and promoting economic development of China, and has certain value for enriching and expanding the research content of ice hydrodynamics.
For the open channel adopting the ice-water two-phase flow water delivery mode, floating ice is easy to block the cross section of the pier, and the safe operation of the water delivery channel is influenced. Therefore, a test device is urgently needed to research the motion rule and the transportation characteristic of the floating ice on the section of the channel pier so as to further research the ice transportation mechanism of the open channel in the ice-water two-phase flow mode.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can study the ice water two-phase flow water delivery test device of floating ice at the sectional law of motion of channel pier and defeated characteristic that moves.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that:
provided is an ice water two-phase flow water delivery test device, which comprises: the basin with set for the slope, a controllable diversion mechanism for providing the water source to the high-order end of basin, a current measurement mechanism for measuring the basin water flow that flows through, one side of keeping away from the high-order end in the basin has set gradually sub-simulation pier column group and the baffle tail-gate of adjustable aperture, sub-simulation pier column group includes a plurality of semi-cylindrical and/or columniform sub-simulation pier columns that are located the same cross-section of basin, sub-simulation pier column group top is provided with the camera, the camera is connected with display device, be provided with the water level measurement mechanism who is used for surveying the sub-simulation pier column group section water level on the basin.
Furthermore, the controllable water diversion mechanism comprises a water tank arranged above the water tank, the water tank is provided with a water inlet pipe, a water outlet pipe leading to the high-position end and a water outlet pipe leading to the outside of the water tank, and the water outlet pipe are respectively provided with a first flow regulating valve and a second flow regulating valve.
Further, the plane side wall of the semi-cylindrical sub-simulation pier stud is connected with the inner side wall of the water tank.
Further, the flow measuring mechanism comprises a thin-wall weir arranged in the water tank.
Further, the water level measuring mechanism comprises a measuring scale arranged on the inner side wall of the water tank.
Further, the water tank is communicated with the underground reservoir through a water return channel communicated with the low-level end of the water tank.
Further, the flow measuring mechanism comprises a thin-wall weir arranged in the water return channel.
Furthermore, the water drain pipe leads to the underground reservoir, and the water inlet pipe is communicated with the underground reservoir through a water pump.
The utility model has the advantages that:
the motion condition of floating ice on the section of a channel pier is simulated by an ice-water two-phase flow water delivery test device. The adjustable water diversion mechanism is used for changing the flow of water flow, the baffle tail gate is used for adjusting the water level at the section of the simulated pier stud group, so that the flow velocity and the Froude number of the water flow are changed, the motion state of ice blocks with different specifications on the section of the simulated pier stud group is combined, the change rule of the ice blocks with different sizes passing through the critical hydraulic parameters of the simulated pier stud group and the influence factors of the change rule are analyzed, the motion rule and the transportation characteristic are summarized, the ice water two-phase flow hydraulic regulation and control method has important significance for realizing the ice water two-phase flow hydraulic regulation and control, scientific basis is provided for the formulation of the hydraulic regulation and control method, and the economic.
Drawings
Fig. 1 is a partial side view of an ice-water two-phase flow water delivery test apparatus in an embodiment.
Wherein, 1, a water tank; 2. a first flow regulating valve; 3. a water outlet pipe; 4. a water tank; 5. simulating pier columns of the bridge piers; 6. a baffle tailgate; 7. a return channel; 8. a thin-walled weir; 9. an underground reservoir; 10. a water pump; 11. a water inlet pipe; 12. a second flow regulating valve; 13. a drain pipe.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art. It should be understood that the embodiments described below are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step, without departing from the spirit and scope of the present invention as defined and defined by the appended claims, belong to the protection scope of the present invention.
As shown in fig. 1, the ice-water two-phase flow water transfer test device includes: basin 4 with set for the slope, a controllable diversion mechanism for providing the water source to the high-order end of basin 4, a current measurement mechanism for measuring 4 rivers flow through the basin, one side of keeping away from the high-order end in the basin 4 has set gradually sub-simulation pier column group and adjustable aperture's baffle tail-gate 6, sub-simulation pier column group includes a plurality of semi-cylindrical and/or columniform sub-simulation pier column 5 that are located the same cross section of basin 4, sub-simulation pier column group top is provided with the camera, the camera is connected with display device, be provided with the water level measurement mechanism that is used for surveying the sub-simulation pier column group section water level on the basin 4.
When the controllable diversion mechanism is implemented, the controllable diversion mechanism preferably comprises a water tank 1 arranged above a water tank 4, a water inlet pipe 11, a water outlet pipe 3 leading to a high-position end and a water outlet pipe 13 leading to the outside of the water tank 4 are arranged on the water tank 1, and a first flow regulating valve 2 and a second flow regulating valve 12 are respectively arranged on the water outlet pipe 3 and the water outlet pipe 13.
The water level in the water tank 1 is controlled by adjusting the pumping speed of the water pump 10, the opening degree of the second flow rate adjustment valve 12, and the opening degree of the first flow rate adjustment valve 2. When the pumping flow of the water pump 10 is equal to the sum of the drainage flow of the drainage pipe 13 controlled by the second flow regulating valve 12 and the water outlet flow of the water outlet pipe 3 controlled by the first flow regulating valve 2, the water level in the water tank 1 can be ensured to be stable and unchanged. The water flow of the water outlet pipe 3 is adjusted on the basis that the water level in the water tank 1 is kept stable and unchanged so that the water flow in the water tank 4 is maintained at a set value, and the water level is stable, so that the accuracy of a test result is further improved.
The plane side wall of the semi-cylindrical sub-simulation pier stud 5 is connected with the inner side wall of the water tank 4, so that the situation that the test result is influenced because the ice blocks are directly contacted with the inner side wall of the water tank 4 on the section of the simulation pier stud group is avoided.
Specifically, the gradient of the water tank 4 is 0.5%, the length of the water tank is 17m, the width of the water tank is 0.8m, the maximum water depth can reach 0.65m, the simulated pier column group comprises two cylindrical sub-simulated pier columns 5 and two semicircular sub-simulated pier columns 5, the radius of each sub-simulated pier column 5 is 5cm, and the clear width between every two adjacent sub-simulated pier columns 5 is 16.67 cm.
Wherein, the flow measuring mechanism comprises a thin-wall weir 8 arranged in the water tank 4, and the water level measuring mechanism comprises a measuring scale arranged on the inner side wall of the water tank 4.
In another embodiment, the water tank 4 communicates with the underground reservoir 9 through a return channel 7 communicating with a lower end thereof. Wherein, the flow measurement mechanism comprises a thin-wall weir 8 arranged in the water return channel 7. The water drain pipe 13 leads to the underground reservoir 9, and the water inlet pipe 11 is communicated with the underground reservoir 9 through the water pump 10 so as to facilitate the recycling of water.
Wherein, be located the basin 4 between sub-simulation pier stud 5 and the controllable diversion mechanism and be provided with rectification mechanism, like the grille for smooth-going rivers to improve experimental accuracy.
The test method of the ice water two-phase flow water delivery test device designed by the scheme comprises the following steps:
making ice blocks with various specifications according to the clear width between the adjacent sub-simulation pier columns 5;
measuring the water flow range of the water tank 4, and setting different water flow values of the test working conditions according to the water flow range;
according to the current test working condition, regulating the water flow of the water tank 4 to a flow value corresponding to the current test working condition through the controllable water diversion mechanism;
when the real-time flow in the water tank 4 is equal to the flow value corresponding to the current test working condition, single ice blocks with different specifications are put in;
recording the motion state of the ice block in front of the section of the pier column group of the simulated pier by using a camera, and sending the motion state to a display device for displaying;
when the ice blocks are stopped at the section of the simulated pier column group, the water level of the section of the simulated pier column group is gradually reduced by adjusting the baffle tail gate 6 until the ice blocks just pass through the section of the simulated pier column group, and the current flow and the water level value of the section of the simulated pier column group are recorded;
and calculating the flow velocity and the flow Froude number of the water flow on the section of the simulated pier stud group according to the size of the water tank 4 on the section of the simulated pier stud group, the recorded flow and the water level value.
Different ice block sizes have different leading edge effects and Venturi effects under the same water flow conditions, and the critical hydraulic parameters of the ice blocks through simulating the section of the pier stud group are different. Compared with the flow velocity of water, the flow Froude number integrates the influence of the flow velocity of water and the water depth, is dimensionless, and is more suitable for being used as a critical parameter for judging whether ice blocks can pass through the simulated pier stud group.
In the implementation, the net width between the pier columns 5 of the adjacent sub-simulation piers is preferably a, the ice cubes are cubic, the side length of the ice cubes is L, and L is more than or equal to 0.9a and less than or equal to 2 a. The device further ensures that all ice blocks cannot smoothly pass through the section of the simulated pier column group under the restriction of the specific size of the test device without the help of water conservancy conditions. Specifically, the side lengths L of the ice cubes are four, namely 16cm, 20cm, 24cm and 32 cm; the thickness t of the ice block is two, namely 3cm and 6 cm.
Claims (8)
1. Ice water two-phase flow water delivery test device, its characterized in that includes: have basin (4) of setting for the slope, be used for to the elevated end of basin (4) provides the controllable diversion mechanism at water source, is used for measuring the current surveying mechanism that flows through basin (4) water flow, keep away from in basin (4) one side of elevated end has set gradually sub-simulation pier column group and adjustable aperture's baffle tail-gate (6), sub-simulation pier column group is located including a plurality of same sectional semi-cylindrical and/or columniform sub-simulation pier column (5) of basin (4), sub-simulation pier column group top is provided with the camera, the camera is connected with display device, be provided with on basin (4) and be used for measuring the water level measurement mechanism of sub-simulation pier column group section water level.
2. The ice-water two-phase flow water conveying test device as claimed in claim 1, wherein the controllable water diversion mechanism comprises a water tank (1) arranged above the water tank (4), a water inlet pipe (11), a water outlet pipe (3) leading to the high-level end and a water drain pipe (13) leading to the outside of the water tank (4) are arranged on the water tank (1), and a first flow regulating valve (2) and a second flow regulating valve (12) are respectively arranged on the water outlet pipe (3) and the water drain pipe (13).
3. The ice-water two-phase flow water delivery test device as claimed in claim 1, wherein the planar side wall of the semi-cylindrical sub-simulation pier stud (5) is connected with the inner side wall of the water tank (4).
4. The ice-water two-phase flow water delivery test device as claimed in claim 1, wherein the flow measurement mechanism comprises a thin-walled weir (8) disposed in the water tank (4).
5. The ice-water two-phase flow water delivery test device as claimed in claim 1, wherein the water level measuring mechanism comprises a measuring scale arranged on an inner side wall of the water tank (4).
6. The ice-water two-phase flow water delivery test device as claimed in claim 2, wherein the water tank (4) is communicated with an underground reservoir (9) through a water return channel (7) communicated with a low-level end thereof.
7. The ice-water two-phase flow water delivery test device as claimed in claim 6, wherein the flow measuring mechanism comprises a thin-walled weir (8) arranged in the water return channel (7).
8. The ice-water two-phase flow water delivery test device as claimed in claim 6, wherein the water drain pipe (13) leads to the underground reservoir (9), and the water inlet pipe (11) is communicated with the underground reservoir (9) through a water pump (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920960042.8U CN210315378U (en) | 2019-06-24 | 2019-06-24 | Ice water two-phase flow water delivery test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920960042.8U CN210315378U (en) | 2019-06-24 | 2019-06-24 | Ice water two-phase flow water delivery test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210315378U true CN210315378U (en) | 2020-04-14 |
Family
ID=70146251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920960042.8U Active CN210315378U (en) | 2019-06-24 | 2019-06-24 | Ice water two-phase flow water delivery test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210315378U (en) |
-
2019
- 2019-06-24 CN CN201920960042.8U patent/CN210315378U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Elnikhely | Investigation and analysis of scour downstream of a spillway | |
| CN110186649B (en) | Test method of ice water two-phase flow water delivery test device | |
| Bazarov et al. | Extinguishing excess flow energy in spillway structures | |
| Zhang et al. | Transverse distribution of streamwise velocity in open-channel flow with artificial emergent vegetation | |
| CN110909490B (en) | Reservoir ice dam water blocking simulation method based on simplified Saint-Venn equation set | |
| CN103898863A (en) | Device and method for studying sediment incipient motion under condition of non-submerged rigid plants | |
| Farhoudi et al. | Investigation on local scour downstream of adverse stilling basins | |
| CN108824381A (en) | A kind of adjustable stepped fish pass of part water retaining height and its design method | |
| Azimi | An introduction to hydraulic structures | |
| Alhamid et al. | Discharge equation for simultaneous flow over rectangular weirs and below inverted triangular weirs | |
| CN210315378U (en) | Ice water two-phase flow water delivery test device | |
| Rostami et al. | An Experimental study into discharge coefficient of labyrinth weirs with rectangular-shaped plans | |
| CN109190263A (en) | Method based on full Basin Rainfall runoff and hydrodynamic model prediction precipitation flow | |
| CN211401323U (en) | Facility for utilizing existing drainage gate to drain down and monitor ecological flow | |
| CN110096670A (en) | A kind of Dynamic calculation method of storage pond reduction peak flow | |
| Leopold | Base level rise: gradient of deposition | |
| Smith et al. | Head ditch hydraulics and the variability of inflows to irrigation furrows | |
| Kao | Hydraulic jump assisted by cross-jet | |
| Salmasi et al. | Evaluation of various design models of irrigation sedimentation basins | |
| Alabas et al. | Investigation of flow regimes and energy dissipation in gabion stepped weirs | |
| Wright et al. | Surges associated with filling of stormwater storage tunnels | |
| Sharwan et al. | Effects on scour for different foundation geometry of compound circular bridge piers | |
| WONGSA et al. | Modelling pre-channelization and their impact on flood and sediment yield in Ishikari River basin | |
| Masood et al. | Utilization of Reverse Slope to Increase Full Supply Level in Small Irrigation Channels | |
| Lama et al. | Study of flow characteristics of junction flow with free flow condition at branch channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |