CN110763426B - Method and device for simulating offshore flow in pool - Google Patents
Method and device for simulating offshore flow in pool Download PDFInfo
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- CN110763426B CN110763426B CN201910948405.0A CN201910948405A CN110763426B CN 110763426 B CN110763426 B CN 110763426B CN 201910948405 A CN201910948405 A CN 201910948405A CN 110763426 B CN110763426 B CN 110763426B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention belongs to the technical field of towing pool hydromechanics, and particularly relates to a method and a device for simulating an offshore flow in a pool. The device has a simple structure, is easy to install, can realize the simulation of the offshore flow, can meet the requirements of the sizes of the offshore flow in different degrees, can carry out controllable research on the offshore flow, better researches the flow velocity and the flow field characteristics of the offshore flow, and utilizes the PIV fluid testing technology to carry out test research on the fine flow field of the offshore flow.
Description
Technical Field
The invention belongs to the technical field of towing pool hydrodynamics, and particularly relates to a method and a device for simulating an offshore flow in a pool.
Background
Offshore currents are ubiquitous at sea and present a danger to people on shore due to the presence of offshore currents. The so-called ashore currents, also called fissures, are a narrow and powerful stream of water in a beam-like shape that flows out to the sea in a direction perpendicular or nearly perpendicular to the coast, and the resulting back flow can carry people swimming in the water into the sea and cause life risks. The method is characterized in that the off-shore flow is researched, performance prediction and safety rescue are carried out on the off-shore flow, fine flow field analysis is carried out on the off-shore flow in order to more accurately research the flowing state of the off-shore flow and the movement mechanism of fluid, the movement state of each part is analyzed, control research needs to be carried out in a test water pool, the harm of the off-shore flow under different states is researched, and then the harm brought by the off-shore flow can be well solved and the off-shore flow can be well predicted.
Disclosure of Invention
The invention aims to provide a method for simulating an offshore flow and an experimental device for carrying out an offshore flow test in a water pool.
The utility model provides a device of pond simulation off-shore flow, by lower carriage 1, liftable hydraulic telescoping device 2, middle low concave swash plate 3, connecting device 4, upper bracket 5, bolt 6 constitutes, lower carriage 1 upper surface is fixed with liftable hydraulic telescoping device 2, the one end of middle low concave swash plate 3 is together articulated with lower carriage 1, the lower surface of middle low concave swash plate 3 is together fixed with the upper portion of liftable hydraulic telescoping device 2, lower carriage 1 is kept away from and is fixed with the support perpendicular to lower carriage 1 with middle low concave swash plate 3 articulated one end, this support passes through bolt 6 with connecting device 4 and fixes together, connecting device 4 is together fixed with upper bracket 5.
The length of the connecting means 4 can be adjusted.
A method of simulating an offshore flow in a pool, comprising the steps of:
(1) mounting a device for simulating an offshore flow in a pool on a central side bridge of a trailer;
(2) adjusting the connecting device to enable the generated waves to rush onto the inclined plate;
(3) the hydraulic telescopic device capable of lifting is adjusted to change different inclinations of the inclined plate;
(4) colored particles are scattered on the inclined plate;
(5) and starting the wave generator on the other side of the water pool, inputting waves with different wave amplitudes and wavelengths, leading the caused waves to strike the inclined plate, and leading the waves on the inclined plate to flow to the low-lying part of the inclined plate and converge to form a backflow to quickly return to the water pool.
The invention has the beneficial effects that:
the device has a simple structure, is easy to install, can realize the simulation of the offshore flow, can meet the requirements of the sizes of the offshore flow in different degrees, can carry out controllable research on the offshore flow, better researches the flow velocity and the flow field characteristics of the offshore flow, and utilizes the PIV fluid testing technology to carry out test research on the fine flow field of the offshore flow.
Drawings
FIG. 1 is a general layout of a simulated offshore flow test apparatus;
FIG. 2 is a front view of the coupling device for coupling the upper and lower brackets;
FIG. 3 is a side view of a coupling device for coupling upper and lower brackets
FIG. 4 is a left side view of the simulated offshore flow test rig;
fig. 5 is a top view of the intermediate low swash plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention aims to provide a method and an experimental device for simulating coastal and offshore flow in a towing tank. The device includes: the hydraulic telescopic device comprises an upper bracket 5, a connecting device 4, 8 bolts 6, a lower bracket 1, a liftable hydraulic telescopic device 2 and a middle low concave inclined plate 3. When the offshore flow is simulated in the towing tank, the device is firstly arranged on a central side bridge of the towing tank, the wave generator on the other side of the tank is started, waves with different wave amplitudes and wavelengths are input, the caused waves hit the inclined plate, the waves on the inclined plate flow to the low-lying part of the inclined plate and are converged to form a backflow, the backflow returns to the tank quickly, and the simulation of the offshore flow is further realized.
The device can change the gradient of swash plate through the hydraulic telescoping device of liftable, and then change the speed of backward flow, through scattering colored particle in swash plate department, can observe the flow state and the flow characteristic of liquid, utilizes the velocity of flow and the flow field of PIV test technique to the fluid to carry out analysis and measurement.
The sloping plate is hinged with the lower bracket, and waves on the sloping plate are converged at the position by the sloping plate with a low concave in the middle, so that a flow of fast backflow is formed.
The hydraulic drive drives the telescopic rod to lift, so that the inclination degree of the inclined plate is changed, and the flow rate of backflow is changed.
The distance to the water surface can be adjusted through the connecting device 4, so that the flexibility of the device is ensured, and the device is not limited by the water surface height of the water collecting pool as far as possible. The device can change the gradient of swash plate through the hydraulic telescoping device of liftable, and then change the speed of backward flow, through scattering colored particle in swash plate department, can observe the flow state and the flow characteristic of liquid, utilizes the velocity of flow and the flow field of PIV test technique to the fluid to carry out analysis and measurement.
The middle low concave sloping plate is hinged with the lower bracket, and waves on the sloping plate are converged at the middle low concave sloping plate, so that a flow of fast backflow is formed, which is the key for simulating the offshore flow.
The liftable hydraulic telescoping device drives the lift of telescopic link through hydraulic drive, and then changes the inclination of swash plate to change the velocity of flow of backward flow.
The device is firstly arranged on a central side bridge of a trailer, the stability of the device is ensured during testing through the fixation of the upper bracket 1, the lower bracket is fixedly connected through a connecting device, namely a figure 2 and 8 bolts, and the middle concave inclined plate is hinged with the lower bracket so as to incline the inclined plate at different inclination angles through the liftable hydraulic telescopic device. Before the test is carried out, the device is adjusted to ensure that the resulting waves can be washed onto the swash plate, and the adjustment of different heights can be carried out by adjusting the connecting device 4 or the height of the central side bridge of the trailer can be directly adjusted.
When the experiment of simulating coast and offshore flow is carried out, the test equipment is installed and debugged, the wave generator is started to input waves with different wave amplitudes and wavelengths, the caused waves hit the inclined plate, the waves on the inclined plate flow to the low-lying position of the inclined plate and are converged to form a reflux, the reflux returns to the water pool quickly, and the simulation of the offshore flow is further realized. The different inclinations of the inclined plate and the wave amplitude and wave height of the wave can be changed to change the offshore flow in different degrees, so that the harm caused by the non-stop offshore flow can be researched. The flow field of the water flow can be observed by scattering colored particles, the colored particles are sprinkled on an inclined plate to observe the flow direction of flowing liquid, and fine flow field analysis is carried out on the offshore flow by utilizing a PIV testing technology. The method has the advantages that certain artificial controllability can be realized by testing the offshore flow in the experiment, the flow field characteristic of the offshore flow can be more accurately measured, and a dangerous working condition is specially researched.
Claims (3)
1. The utility model provides a device of pond simulation off-shore flow, comprises lower carriage (1), hydraulic telescoping device (2) of liftable, middle low concave swash plate (3), connecting device (4), upper bracket (5), bolt (6), its characterized in that: the hydraulic telescopic device comprises a lower support (1), a liftable hydraulic telescopic device (2) is fixed on the upper surface of the lower support (1), one end of a middle low concave inclined plate (3) is hinged to the lower support (1), the lower surface of the middle low concave inclined plate (3) is fixed to the upper portion of the liftable hydraulic telescopic device (2), one end, hinged to the middle low concave inclined plate (3), of the lower support (1) is fixed to a support perpendicular to the lower support (1), the support is fixed to a connecting device (4) through bolts (6), and the connecting device (4) is fixed to an upper support (5).
2. A pool device for simulating offshore flow according to claim 1, characterised in that the length of the connection means (4) is adjustable.
3. A method for simulating an offshore flow in a pool is characterized by comprising the following steps:
(1) mounting a device for simulating an offshore flow in a pool on a central side bridge of a trailer;
(2) adjusting the connecting device to enable the generated waves to rush onto the inclined plate;
(3) the hydraulic telescopic device capable of lifting is adjusted to change different inclinations of the inclined plate;
(4) colored particles are scattered on the inclined plate;
(5) and starting the wave generator on the other side of the water pool, inputting waves with different wave amplitudes and wavelengths, leading the caused waves to strike the inclined plate, and leading the waves on the inclined plate to flow to the low-lying part of the inclined plate and converge to form a backflow to quickly return to the water pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948405.0A CN110763426B (en) | 2019-09-29 | 2019-09-29 | Method and device for simulating offshore flow in pool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948405.0A CN110763426B (en) | 2019-09-29 | 2019-09-29 | Method and device for simulating offshore flow in pool |
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| Publication Number | Publication Date |
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| CN110763426A CN110763426A (en) | 2020-02-07 |
| CN110763426B true CN110763426B (en) | 2021-09-10 |
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| CN115560951B (en) * | 2022-09-28 | 2023-07-25 | 江苏科技大学 | Model test pool capable of simulating underwater topography |
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