CN112345204A - Underwater bionic fin immersion type propulsion testing device and method - Google Patents
Underwater bionic fin immersion type propulsion testing device and method Download PDFInfo
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- CN112345204A CN112345204A CN202011354346.3A CN202011354346A CN112345204A CN 112345204 A CN112345204 A CN 112345204A CN 202011354346 A CN202011354346 A CN 202011354346A CN 112345204 A CN112345204 A CN 112345204A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses an underwater bionic fin immersion type propulsion testing device and method. The testing device comprises a water tank and a circulating water channel body, wherein the body is arranged in the water tank, the middle part of the body is provided with a middle partition plate to divide a water channel into a water flow driving water channel area and a test observation water channel area, the left end of the water flow driving water channel area is provided with a rice-shaped splitter plate, the right end of the water flow driving water channel area is provided with a propeller, the left end of the test observation water channel area is provided with a square honeycomb flow stabilizing sieve, the right end of the test observation water channel area is provided with a barrier, the left side of the body is provided with a; a circulating water driving motor is arranged on the outer side of the right end of the water tank and connected with a propeller; the test observation water channel area top is equipped with the waterproof driving motor of bionical fin, the waterproof driving motor of bionical fin has bionical fin shaft coupling, connecting axle II, force cell sensor, connecting axle I and bionical fin in proper order. The invention has simple structure, controllable water flow and accurate test.
Description
Technical Field
The invention relates to an underwater bionic fin immersion type propulsion testing device and method, and belongs to the field of hydrodynamics and experimental hydrodynamics research.
Background
The fish has extraordinary underwater motion capability, and biological geometric and kinematic characteristics of the bionic fin structure can be provided for the bionic fin structure design by observing the swimming posture of the live fish, and the experimental device for observing the live fish and testing the performance of the bionic fin is an important means for recording the posture of the live fish and analyzing the performance of the bionic structure, and is particularly important.
The existing experimental device for testing the structure performance of the bionic fin similar to a fish shape is mostly placed in an open static water environment. The application numbers are: the invention patent of CN201610128151.4 introduces a six-dimensional test platform for underwater equipment water tunnel experiments, which is a suspended beam guide rail type structure and can collect six-dimensional stress of underwater equipment in still water and under different water flows by adopting a relative motion principle. However, the water pool is a still water pool, six-dimensional stress collection under different water flows is realized by adopting a relative movement principle, the relative speed is low, the stability is poor, and a high-speed camera cannot be used for recording the movement in the movement process. Live fish observation and bionic fin performance tests have extremely high requirements on stable and continuous water flow. The application numbers are: 201720002509.9 discloses a horizontal circulating water tank with a flow guiding and rectifying device, wherein the flow guiding and rectifying device is of a sectional structure, and can effectively reduce the influence of the transverse circulation on the experimental result, but the invention can not eliminate the vortex influence caused by a propeller, and the propeller needs to push the water flow in the whole pipeline, so that the energy consumption is high, the efficiency is low, and simultaneously, the water medium is difficult to be ensured to fill the inside of the whole pipeline.
Disclosure of Invention
The invention aims to overcome the problems and the defects in the prior art and provides an underwater bionic fin immersion type propulsion testing device and an underwater bionic fin immersion type propulsion testing method.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme.
An underwater bionic fin immersion type propulsion testing device comprises a water tank 5 and a circulating water channel body 17, and is characterized in that the water tank 5 is a cuboid, the section of the circulating water channel body 17 is oval, the circulating water channel body is arranged in the water tank 5, the middle of the circulating water channel body 17 is divided into a water flow driving water channel area and a test observation water channel area by arranging a circulating water channel middle partition plate 12 along the long diameter direction, wherein the left end of the water flow driving water channel area is provided with a rice-shaped splitter plate 13 for splitting and stabilizing flow, the right end of the water flow driving water channel area is provided with a propeller 11, the left end of the test observation water channel area is provided with a square honeycomb stabilizing flow sieve 16, the right end of the test observation water channel area is provided with a barrier 22, the left sides of the rice-shaped splitter plate 13 and the square honeycomb stabilizing flow sieve 16 are provided with a; a circulating water driving motor 9 is arranged on the outer side of the right end of the water tank 5 through a motor support 27, the circulating water driving motor 9 is sequentially connected with a circulating water driving coupler II 8 arranged on the water tank 5 in a penetrating manner, a circulating water driving coupler I7 arranged on a circulating water channel body 17 in a penetrating manner and a propeller connecting shaft 10, and the other end of the propeller connecting shaft 10 is connected with the propeller 11; the testing observation water channel region top is provided with the waterproof driving motor of bionical fin 1, the waterproof driving motor of bionical fin 1 top-down has connected gradually bionical fin shaft coupling 26, bionical fin connecting axle II 25, force cell sensor 24, bionical fin connecting axle I23 and bionical fin 2.
Further preferably, the top of the circulating water channel body 17 is further provided with a circulating water channel sealing cover 18, a square opening for installing the circulating water channel observation area sealing cover 21 is further formed in the circulating water channel sealing cover 18 corresponding to the experiment observation water channel area, and the bionic fin waterproof driving motor 1 is fixedly installed on the circulating water channel observation area sealing cover 21.
Further preferably, a refractor 20 with an adjustable angle is arranged on the circulating water channel sealing cover 18 at the top of the experimental observation water channel area along the length direction of the circulating water channel body 17 through a refractor bracket 19.
Further preferably, a camera 3 with a tripod 4 is further arranged outside the front side of the water tank 5 and facing the refractor 20.
Preferably, the water tank 5 is made of transparent glass, and a white bottom plate 6 is further arranged at the bottom of the water tank 5.
Further preferably, the number of the semicircular guide plates 14 is 3-5, and the distance between the semicircular guide plates 14 is 2 cm-5 cm.
Preferably, the material of the circulating water channel body 17, the circulating water channel sealing cover 18 and the circulating water channel observation area sealing cover 21 is transparent glass or PVC material.
Preferably, the water tank 5 and the circulating water channel body 17 are respectively provided with a water inlet and outlet valve switch, wherein the water level of the filling water of the water tank 5 is 10cm-15cm higher than that of the circulating water channel body 17.
Further preferably, a sealing ring is further arranged at the installation position of the water tank 5 and the circulating water driving coupler II 8.
The invention discloses a testing method of an underwater bionic fin immersed propulsion testing device, which comprises the following steps:
step 1, injecting water into a water tank 5 until a circulating water channel body 17 is completely immersed, wherein the water level is 10-15cm higher than the top surface of the circulating water channel body 17;
step 3, recording the flow of the measuring points after the trend of the data curve acquired by each measuring point of the flowmeter 15 is stable, and calculating a stable speed at the moment;
and 6, repeating the steps 2 to 5 to obtain hydrodynamic performance indexes of the bionic fin 2 at different water flow speeds.
The invention has the following advantages and beneficial effects:
1. the meter-shaped plate is arranged in front through water circulation, vortex caused by the propeller can be segmented, the semicircular multi-channel water is guided in the vertical direction at the bend, the square honeycomb type flow stabilizing sieve is used for stabilizing the flow of the water again in the full section, and the water flow which is more stable, controllable in flow and accurate in measurement can be obtained. The water medium circulating structure adopts a local immersion mode, so that the flow velocity of small water in the water tank can be conveniently adjusted under the condition of lower energy consumption, and the living fish and the bionic fin can be ensured to obtain more stable water flow in a closed water medium environment.
2. The adjustable mirror surface structure is arranged above the observation area, the front view and the top view of the observation area can be positioned at the same visual angle, and the camera positioned right in front of the observation area can observe two visual angles in the same time domain, so that observation and test recording are facilitated.
Drawings
FIG. 1 is a top plan view of the general assembly of the test apparatus of the present invention.
FIG. 2 is a front view of the general assembly of the test apparatus of the present invention.
FIG. 3 is a view of the general assembly A-A of the test apparatus of the present invention.
FIG. 4 is a view of the general assembly B-B of the test apparatus of the present invention.
FIG. 5 is a schematic view of the overall assembly of the test apparatus of the present invention.
Fig. 6 is a schematic view of a semi-circular baffle.
Fig. 7 is a schematic view of a rice-shaped flow distribution plate.
Wherein, 1-bionic fin waterproof driving motor; 2, bionic fin; 3-a camera; 4-tripod rest; 5, a water tank; 6-white bottom plate; 7-circulating water drives the coupling I; 8, driving a coupling II by circulating water; 9-circulating water driving motor; 10-propeller connecting shaft; 11-a propeller; 12-a middle clapboard of a circulating water channel; 13-a rice-shaped flow distribution plate; 14-semicircular baffles; 15-a flow meter; 16-square honeycomb steady flow sieve; 17-circulating water channel body; 18-sealing a circulating water channel; 19-a refractor holder; 20-a refractor; 21-sealing a circulating water channel observation area; 22-a barrier gate; 23-bionic fin connecting shaft I; 24-a force sensor; 25-bionic fin connecting shaft II; 26-bionic fin coupling; 27-circulating water driving motor support.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, the underwater bionic fin immersion type propulsion test device of the present invention comprises a water tank 5 and a circulating water channel body 17, wherein the water tank 5, the circulating water channel body 17 and a circulating water driving motor 9 are arranged from left to right. The water tank 5 is a cuboid, and the section of the circulating water channel body 17 is oval and is placed in the water tank 5. A white bottom plate 6 is arranged below the water tank 5, so that a good contrast color is formed when living fishes or bionic fins are observed conveniently.
As shown in fig. 3-7, the middle part of the oval-shaped circulating water channel body 17 is provided with a circulating water channel middle partition plate 12 along the major axis direction to divide the water channel into a water flow driving water channel area and a test observation water channel area, wherein the left end of the water flow driving water channel area is provided with a rice-shaped splitter plate 13 for splitting and stabilizing flow, and the right end of the water flow driving water channel area is provided with a propeller 11. The right-hand member outside of water tank 5 is provided with circulating water driving motor 9 through motor support 27, and circulating water driving motor 9 connects gradually and wears circulating water drive coupling II 8 of dress on water tank 5, wears circulating water drive coupling I7 and the screw connecting axle 10 of dress on circulation water course body 17, the other end of screw connecting axle 10 is connected screw 11. The power of the circulating water in the oval circulating water channel body 17 is obtained by driving the propeller 11 by the circulating water driving motor 9 outside the water tank 5, so that water in the water channel driven by water flow obtains driving force and flows from right to left. The rice-shaped flow distribution plate 13 is arranged at the leftmost end of the water flow driving water channel area and divides and stabilizes the water flow pushed by the propeller 11.
Embedded 3 ~ 5 semi-circular guide plate 14 that the radius is unequal in the left end of circulating water channel body 17, semi-circular guide plate 14 equidistant placing (the interval is 2cm ~ 5cm), can communicate by circulating water channel median septum 12 part rivers drive water course district and experimental observation water course district, can be used to rivers turn to, also can be to the incoming flow segmentation stationary flow once more behind the rice shape flow distribution plate, and carry out perpendicular refluence, the influence of at utmost reduction torrent, make things convenient for experimental observation water course district to test and observe. The flow meters 15 are arranged between the semicircular guide plates 14 on one side of the experimental observation water channel area, so that the flow of water in each small interval is conveniently obtained, the water flow speed is obtained according to the regular cross section area, and the obtained value of each small interval flow meter 15 can be used as transverse comparison.
The experimental observation water channel area in the circulating water channel body 17 is composed of a square honeycomb flow stabilizing sieve 16 and a barrier grid 22 from left to right in sequence. The square honeycomb flow stabilizing sieve 16 is positioned at the left end of the experimental observation water channel area, and can perform full-section segmentation and flow stabilization on the incoming flow passing through the semicircular flow guide plate 14, so that the influence of the thickness of the semicircular flow guide plate 14 on the turbulence of the obtained vertical incoming flow is avoided. The blocking grid 22 is arranged at the right end of the experimental observation water channel area and is composed of bars at the same interval, so that live fish can be blocked when being observed. Between the square honeycomb flow stabilizing screen 16 and the barrier grid 22 is the test observation area of the test apparatus of the present invention.
The top of the circulating water channel body 17 is provided with a circulating water channel sealing cover 18, a square opening for installing a circulating water channel observation area sealing cover 21 is further formed in the circulating water channel sealing cover 18 corresponding to the experimental observation water channel area, the top surface of the experimental observation water channel area is sealed by the circulating water channel observation area sealing cover 21 alone, and live fish or bionic fins can be collected and released conveniently during experimental operation. A circular hole is formed in the circulating water channel observation area sealing cover 21, and the bionic fin waterproof driving motor 1 is placed on the upper portion of the circular hole. An output shaft of the bionic fin waterproof driving motor 1 penetrates through a round hole from top to bottom to be sequentially connected with a bionic fin coupler 26, a bionic fin connecting shaft II 25, a force transducer 24, a bionic fin connecting shaft I23 and a bionic fin 2. The bionic fin waterproof driving motor 1 drives the bionic fin 2 to reciprocate periodically to swing, and the force sensor 24 can acquire the driving force, the lifting force, the transverse force and the torque generated when the bionic fin 2 swings.
On the circulating water channel closing cap 18 at experimental observation water course district top, install adjustable angle's refractor 20 along circulating water course body 17 major axis direction through setting up refractor support 19, refractor 20 is supported and adjustable angle by refractor support 19, and the front view and the overlooking visual angle of living fish or bionical fin 2 are observed at same time domain to the camera 3 that conveniently lies in experimental observation water course district dead ahead setting, acquire its motion gesture and wake characteristic.
In order to facilitate experimental observation, the water tank 5 and the circulating water channel body 17 are made of transparent glass or PVC and other materials.
The invention (working principle) is used for carrying out detailed operation explanation on a bionic fin test as an example, and the operation mode of the live fish test is observed to be similar:
the invention discloses a testing method of an underwater bionic fin immersed propulsion testing device, which comprises the following steps:
step 1, injecting water into the water tank 5 until the circulating water channel body 17 is completely immersed (the water level is 10-15cm higher than the circulating water channel).
And 2, starting the external circulating water driving motor 9, comparing data acquired by each measuring point of the flowmeter 15, and judging whether the circulating water driving motor 9 is in a stable operation state.
And 3, recording the flow of the measuring points after the trend of the data curve acquired by each measuring point of the flowmeter 15 is stable, and calculating a stable speed at the moment.
And 4, starting the bionic fin waterproof bionic driving motor 1, and recording the driving force, the lifting force, the transverse force and the torque generated when the bionic fin 2 swings through the force transducer 24. And simultaneously, starting the camera 3, and recording the forward-looking and overlooking motion postures and wake flow characteristics of the bionic fin 2.
And 5, after the acquired driving force, lifting force, transverse force and torque range are periodically changed, closing the bionic fin waterproof bionic driving motor 1.
And 6, repeating the steps 2-5 to obtain hydrodynamic performance indexes of the bionic fin 2 at different water flow speeds.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The underwater bionic fin immersion type propulsion testing device comprises a water tank (5) and a circulating water channel body (17), and is characterized in that the water tank (5) is a cuboid, the cross section of the circulating water channel body (17) is oval, the circulating water channel body is arranged in the water tank (5), the middle of the circulating water channel body (17) is divided into a water flow driving water channel area and a test observation water channel area by arranging a circulating water channel middle partition plate (12) along the long diameter direction, wherein a rice-shaped splitter plate (13) for splitting and stabilizing flow is arranged at the left end of the water flow driving water channel area, a propeller (11) is arranged at the right end of the water flow driving water channel area, a square honeycomb stabilizing flow sieve (16) is arranged at the left end of the test observation water channel area, a barrier (22) is arranged at the right end of the test observation water channel area, a plurality of semicircular guide plates (14) with different radiuses are, flow meters (15) are respectively arranged in the intervals; a circulating water driving motor (9) is arranged on the outer side of the right end of the water tank (5) through a motor support (27), the circulating water driving motor (9) is sequentially connected with a circulating water driving coupler II (8) arranged on the water tank (5) in a penetrating mode, a circulating water driving coupler I (7) arranged on a circulating water channel body (17) in a penetrating mode and a propeller connecting shaft (10), and the other end of the propeller connecting shaft (10) is connected with the propeller (11); the testing observation water channel region top is provided with a bionic fin waterproof driving motor (1), and the bionic fin waterproof driving motor (1) is sequentially connected with a bionic fin coupler (26), a bionic fin connecting shaft II (25), a force transducer (24), a bionic fin connecting shaft I (23) and a bionic fin (2) from top to bottom.
2. The underwater bionic fin immersion type propulsion testing device according to claim 1, wherein a circulating water channel sealing cover (18) is further arranged at the top of the circulating water channel body (17), a square opening for installing the circulating water channel observation area sealing cover (21) is further formed in the circulating water channel sealing cover (18) corresponding to the experimental observation water channel area, and the bionic fin waterproof driving motor (1) is fixedly installed on the circulating water channel observation area sealing cover (21).
3. The underwater biomimetic fin submerged propulsion test device according to claim 1, wherein a refractor (20) with an adjustable angle is arranged on a circulating water channel sealing cover (18) at the top of the experimental observation water channel area along the long diameter direction of a circulating water channel body (17) through a refractor bracket (19).
4. The underwater biomimetic fin submerged propulsion test device according to claim 1, wherein a camera (3) with a tripod support (4) is further arranged outside the front side of the water tank (5) and facing the refractor (20).
5. The underwater bionic fin submerged propulsion test device as claimed in claim 1 or 4, wherein the water tank (5) is made of transparent glass, and a white bottom plate (6) is further arranged at the bottom of the water tank (5).
6. The underwater bionic fin submerged propulsion testing device as claimed in claim 1, wherein the number of the semicircular guide plates (14) is 3-5, and the distance between the semicircular guide plates (14) is 2-5 cm.
7. The underwater biomimetic fin submerged propulsion test device according to claim 2, wherein the circulating water channel body (17), the circulating water channel sealing cover (18) and the circulating water channel observation area sealing cover (21) are all made of transparent glass or PVC material.
8. The underwater bionic fin submerged propulsion testing device according to claim 1, wherein the water tank (5) and the circulating water channel body (17) are respectively provided with a water inlet and outlet valve switch, wherein the filling water level of the water tank (5) is 10cm-15cm higher than that of the circulating water channel body (17).
9. The underwater biomimetic fin submerged propulsion testing device according to claim 1, wherein a sealing ring is further arranged at the installation position of the water tank (5) and the circulating water driving coupling II (8).
10. A testing method of the underwater biomimetic fin submerged propulsion testing device according to any one of claims 1-9, characterized by comprising the following steps:
step 1, injecting water into a water tank (5) until a circulating water channel body (17) is completely immersed, wherein the water level is 10-15cm higher than the circulating water channel body (17);
step 2, starting an external circulating water driving motor (9), comparing data acquired by each measuring point of a flowmeter (15), and judging whether the circulating water driving motor (9) is in a stable operation state;
step 3, recording the flow of the measuring points after the trend of the data curve acquired by each measuring point of the flowmeter (15) is stable, and calculating the stable speed at the moment;
step 4, starting the bionic fin waterproof bionic driving motor (1), recording a pushing force, a lifting force, a transverse force and a torque generated when the bionic fin (2) swings through a force measuring sensor (24), simultaneously starting a camera (3), and recording the forward-looking and overlooking motion postures and wake flow characteristics of the bionic fin (2);
step 5, after the acquired driving force, lifting force, transverse force and torque process are periodically changed, the bionic fin waterproof bionic driving motor (1) is closed;
and 6, repeating the steps 2 to 5 to obtain hydrodynamic performance indexes of the bionic fin (2) at different water flow speeds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011354346.3A CN112345204B (en) | 2020-11-27 | 2020-11-27 | Underwater bionic fin immersion type propulsion testing device and method |
| PCT/CN2021/087807 WO2022110617A1 (en) | 2020-11-27 | 2021-04-16 | Submerged propulsion test device and method for underwater bionic fin |
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| CN202011354346.3A CN112345204B (en) | 2020-11-27 | 2020-11-27 | Underwater bionic fin immersion type propulsion testing device and method |
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| CN112345204B CN112345204B (en) | 2022-06-17 |
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| WO2022110617A1 (en) * | 2020-11-27 | 2022-06-02 | 江苏科技大学 | Submerged propulsion test device and method for underwater bionic fin |
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| CN115901051A (en) * | 2022-11-10 | 2023-04-04 | 哈尔滨工程大学 | Device and method for measuring net self-thrust of flexible plate in self-propelled state |
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| CN112345204B (en) | 2022-06-17 |
| WO2022110617A1 (en) | 2022-06-02 |
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