CN111044257B - Rectifying device for water tunnel or water tank - Google Patents
Rectifying device for water tunnel or water tank Download PDFInfo
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- CN111044257B CN111044257B CN201911395885.9A CN201911395885A CN111044257B CN 111044257 B CN111044257 B CN 111044257B CN 201911395885 A CN201911395885 A CN 201911395885A CN 111044257 B CN111044257 B CN 111044257B
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- 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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Abstract
The invention discloses a rectifying device for a water tunnel or a water tank, which can rectify low, medium and high speed water tunnels or water tanks through a rectifying system, and the rectifying system for the rectifying device mainly comprises: buffer, first curb plate, stationary flow bent plate, second curb plate, first stationary flow board, second stationary flow board, honeycomb group, thin wall micro orifice plate, honeycomb ware, first turbulence baffle, second turbulence baffle, third turbulence baffle fall. The invention firstly buffers and stabilizes the water flow, then breaks the large vortex of the water flow, and the honeycomb group can obviously reduce the transverse and longitudinal turbulence of the water flow. The invention solves the difficulty that the damping net blocks trace particles or solid particles in the conventional water tunnel rectification, eliminates the problem of 'hissing sound' in a rectification device under high-speed water flow, and simultaneously, the honeycomb group structure can more effectively break large vortexes in the water flow, can obviously reduce the transverse and longitudinal turbulence of the water flow and improve the flow field quality.
Description
Technical Field
The invention belongs to the field of experimental hydromechanics test equipment, and particularly relates to a rectifying device for a water tunnel or a water tank.
Background
The water tunnel and water tank equipment for fluid mechanics experiment is a reverse running equipment, i.e. the object is fixed, and the water flow reversely flows through the object. In the experiment, in order to obtain a more accurate result, an experimental object needs to be in a more ideal flow field quality, the requirement on the flow field of a flowing medium in a water tunnel water tank is strict, the current rectifying data about the water tunnel is less, and the water tunnel rectifying devices and the water tank rectifying devices are designed by referring to the wind tunnel rectifying devices, but the influence of disturbance is larger due to the incompressible characteristic of water, and meanwhile, compared with air water, the wind tunnel rectifying device cannot be completely designed by referring to the air water with the characteristics of biodegradability, water elasticity, large density and larger viscosity difference. Aiming at the problems of poor rectifying effect, high loss and high cost of the current water tunnel and water tank, the development of a rectifying device for the water tunnel and the water tank is very meaningful.
The prior art adopts a method of combining a honeycomb device and a damping net for rectification, and the technology has the following defects: (1) the initial liquid flow is not stabilized, and the service life of rectifying devices in the equipment is easily reduced because the rectifying devices in the equipment are damaged due to the disturbance and instability of the liquid flow; (2) the whole loss is large due to the existence of the damping net; (3) these techniques are only suitable for wind tunnel and low speed water tunnel, but not for high speed water tunnel, when the water flow speed is more than 10m/s, the damping net will generate "whooshing" noise. (4) When the water tunnel and the water tank are used for researching solid-liquid two-phase flow, the existence of the damping net can block solid particles or trace particles.
Disclosure of Invention
The invention aims to provide a rectifying device for a water tunnel or a water tank. The technical scheme of the invention is as follows:
a fairing used for a water tunnel or a water tank comprises a fairing 1, wherein the fairing 1 is a horizontally arranged square box structure and comprises an inlet flange 11, a fairing system 12, a reinforcing rib plate 13, an observation window 14, an outlet flange 15, three turbulence reduction partition grooves 16 and a fairing chamber 17; rectifying chamber 17 is the square pipe that stainless steel pipe welding formed, deep floor plate 13 has been welded to the outer wall of square pipe, import flange 11 is located rectifying chamber 17's the direction of intaking one end, outlet flange 15 is located rectifying chamber 17's play water direction one end, three ways fall torrent baffle groove 16 along vertical direction and mutual parallel arrangement in next-door neighbour's outlet flange 15 department, observation window 14 is connected in rectifying chamber 17's last side.
The rectification system 12 is installed in a rectification chamber 17 cavity, and the rectification system 12 comprises: a buffer device 121, a first flow stabilizer plate 122, a second flow stabilizer plate 123, a honeycomb stack 124, a first turbulence reduction baffle 125, a second turbulence reduction baffle 126, and a third turbulence reduction baffle 127; a buffer device 121, a first flow stabilizing plate 122, a second flow stabilizing plate 123, a honeycomb group 124, a first turbulence reduction partition plate 125, a second turbulence reduction partition plate 126 and a third turbulence reduction partition plate 127 are sequentially arranged from one end of the inlet flange 11 to the direction of the outlet flange 15; and a first turbulence reduction partition plate 125, a second turbulence reduction partition plate 126 and a third turbulence reduction partition plate 127 are respectively installed in the three turbulence reduction partition plate grooves 16.
The distance between the buffer device 121 and the first flow stabilizing plate 122 is L1, the distance between the first flow stabilizing plate 122 and the second flow stabilizing plate 123 is L2-500 mm, the distance between the second flow stabilizing plate 123 and the honeycomb group 124 is L3-500 mm, the distance between the honeycomb group 124 and the first turbulence reduction partition plate 125 is L4-50 mm, the distance between the first turbulence reduction partition plate 125 and the second turbulence reduction partition plate 126 is L5, and the distance between the second turbulence reduction partition plate 126 and the third turbulence reduction partition plate 127 is L6.
The buffer device 121 comprises a steady flow bent plate 1212, a first side plate 1211 and a second side plate 1213, wherein the steady flow bent plate 1212, the first side plate 1211 and the second side plate 1213 are made of stainless steel plates, the first side plate 1211 and the second side plate 1213 are welded on two sides of the steady flow bent plate 1212, the aperture ratio of the first side plate 1211, the second side plate 1213 and the steady flow bent plate 1212 is 85%, and the aperture diameter is 10 times of the thickness of the stainless steel plates.
The honeycomb device group 124 comprises a thin-wall micro-pore plate 1241 and a honeycomb device 1242 which are welded, the honeycomb device 1242 is formed by welding square pipe units 12421 in an array mode, the specification of each square pipe unit 12421 is the same, the thin-wall micro-pore plate 1241 is a stainless steel plate with the thickness of 0.1mm, round holes with the diameter of 0.3mm are uniformly arranged on the stainless steel plate, and the aperture ratio of the stainless steel plate is 60%.
The longitudinal center positions of four wall surfaces of the square tube unit 12421 are respectively provided with a row of round holes with the diameter of 0.3mm, the hole pitch is 10mm, and the ratio of the length of the honeycomb device to the equivalent diameter of the honeycomb device is 8-60.
When the rectifying chamber 17 is used for rectifying water tunnels, the upper side of the rectifying chamber 17 is closed and is provided with the observation window 14, so that observation and equipment installation are facilitated; when the rectifying chamber 17 is used for rectifying the water tank, the rectifying chamber 17 is a U-shaped open groove body, and the observation window 14 is not installed.
The observation window 14 is made of a transparent organic glass plate, bolt holes and sealing grooves are formed in the periphery of the organic glass plate, and the organic glass plate is fixed on the rectifying chamber 17 through bolts; the wall of the observation window 14 is provided with three turbulence-reducing baffle grooves 141, and the three turbulence-reducing baffle grooves 141 are groove bodies made of organic glass plates and are respectively used for accommodating the upper sides of the first turbulence-reducing baffle 125, the second turbulence-reducing baffle 126 and the third turbulence-reducing baffle 127.
Turbulence reduction baffle groove 16 is the channel-section steel structure, and its groove width size is 1 ~ 5 mm.
The first turbulence reduction partition plate 125, the second turbulence reduction partition plate 126 and the third turbulence reduction partition plate 127 are all provided with circular holes uniformly in a rectangular region within a distance of 20mm from the edge M of the partition plate, wherein the diameter of the open hole of the first turbulence reduction partition plate 125 is 0.9mm, the aperture ratio is greater than 80%, the diameter of the open hole of the second turbulence reduction partition plate 126 is 0.6mm, the aperture ratio is greater than 70%, the diameter of the open hole of the third turbulence reduction partition plate 127 is 0.3mm, and the aperture ratio is greater than 58%; the first turbulence reduction partition plate 125, the second turbulence reduction partition plate 126 and the third turbulence reduction partition plate 127 are respectively inserted into the three turbulence reduction partition plate grooves 16.
The L1 is 20-50 times of the diameter of the opening of the buffer device 121, the L5 is 30-50 times of the diameter of the opening of the first turbulence reduction partition plate 125, and the L6 is 30-50 times of the diameter of the opening of the second turbulence reduction partition plate 126.
The beneficial technical effects of the invention are embodied in the following aspects:
(1) the invention replaces the damping net in the prior rectifying device, can rectify low, medium and high speed water holes or water tanks, and solves the problem that the damping net blocks trace particles or solid particles in the conventional water hole rectification.
(2) The 'hoarse sound' problem in the fairing under the high-speed water flow is eliminated.
(3) The honeycomb group structure can more effectively break large vortexes in water flow, can obviously reduce the transverse and longitudinal turbulence of the water flow, improves the uniformity of flow velocity distribution along the cross section and the flow velocity stability, and minimizes the water surface gradient and the wave making condition of the water tank.
(4) The main component is a stainless steel plate, so the structure is stable; the perforated member has a large diameter and a high opening ratio, and thus has a small flow resistance loss.
Drawings
Fig. 1 is a schematic view of the general structure of the present invention.
Fig. 2 is a partial sectional view of the general structure of the present invention.
FIG. 3 is a schematic view of a rectification system of the present invention.
Fig. 4 is a schematic view of the structure of the buffer device.
Fig. 5 is a schematic diagram of a cell cluster configuration.
Fig. 6 is a schematic diagram of a honeycomb.
FIG. 7 is a schematic view of a square tube unit.
FIG. 8 is a schematic view of a first turbulence reducing baffle.
Fig. 9 is a schematic view of the application of the present invention in a sink.
Sequence numbers in the upper figure: the flow rectification device 1, the inlet flange 11, the flow rectification system 12, the buffer device 121, the first side plate 1211, the steady flow bent plate 1212, the second side plate 1213, the first flow stabilization plate 122, the second flow stabilization plate 123, the honeycomb group 124, the thin-wall micro perforated plate 1241, the honeycomb device 1242, the square pipe unit 12421, the first turbulence reduction partition plate 125, the second turbulence reduction partition plate 126, the third turbulence reduction partition plate 127, the reinforcing rib plate 13, the observation window 14, the upper turbulence reduction partition plate groove 141, the outlet flange 15, the turbulence reduction partition plate groove 16, the flow rectification chamber 17, the contraction section 2, the test section 3, the power system 4, the backflow section 5, the support 6, the third corner 7 and the fourth corner 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Example one
In an exemplary embodiment of the invention, a fairing for a water tunnel or flume is provided.
As shown in fig. 1 to 3, a rectifying device for a water tunnel or a water tank according to the present invention includes: the turbulence reduction device comprises an inlet flange 11, a rectifying system 12, a buffer device 121, a first side plate 1211, a steady flow bent plate 1212, a second side plate 1213, a first steady flow plate 122, a second steady flow plate 123, a honeycomb group 124, a thin-wall micro-hole plate 1241, a honeycomb device 1242, a square tube unit 12421, a first turbulence reduction partition plate 125, a second turbulence reduction partition plate 126, a third turbulence reduction partition plate 127, a reinforcing rib plate 13, an observation window 14, an upper turbulence reduction partition plate groove 141, an outlet flange 15, a turbulence reduction partition plate groove 16 and a rectifying chamber 17. The rectifying chamber 17 is a square tube formed by welding stainless steel tubes, wherein the cross section of the square tube is 230 multiplied by 240mm, the outer wall of the square tube is welded with a reinforcing rib plate 13, the front and the back of the rectifying chamber 17 are provided with an inlet and an outlet of water flow, the water flow enters from an inlet flange 11 and flows out from an outlet flange 15 after passing through a rectifying system 12 in the rectifying chamber; if the device is a water tunnel rectifying device, an observation window 14 is arranged on the rectifying chamber, so that the internal flow field can be observed conveniently and internal equipment can be maintained conveniently; if the device is used for rectifying water in a water tank, the rectifying chamber is a U-shaped tank body, and the upper part of the rectifying chamber is not provided with an observation window 14; after flowing into the rectifying chamber 17 through the inlet flange 11, the water first passes through the buffer device 121 for buffering and distributing; the first flow stabilizing plate 122 and the second flow stabilizing plate 122 which have redistribution function on the liquid flow are positioned behind the buffering device 121, wherein the distance L1 between the buffering device 121 and the first flow stabilizing plate 122 is 120 mm; the distance L2 between the first flow stabilizer 122 and the second flow stabilizer 123 is 500 mm; the second flow stabilizer 123 is at a distance L3 from the honeycomb group 124, where L3 is 600 mm; the distance L4 between the honeycomb group 124 and the first turbulence reduction partition plate 125 is 60mm, and the distances L5 and L6 between the turbulence reduction partition plates are 45mm and 30mm respectively; a section of static flow section is left behind the turbulence reduction partition plate, wherein the distance of the static flow section is 47 mm.
The observation window 14 is made of a transparent organic glass plate, bolt holes and sealing grooves are formed in the periphery of the organic glass plate, and the organic glass plate is fixed on the rectifying chamber 17 through bolts; the wall of the observation window 14 is provided with three turbulence-reducing baffle grooves 141, the three turbulence-reducing baffle grooves 141 are groove bodies made of organic glass plates, wherein the width of the turbulence-reducing baffle grooves 141 is 5mm, and the turbulence-reducing baffle grooves are respectively used for accommodating the upper sides of the first turbulence-reducing baffle 125, the second turbulence-reducing baffle 126 and the third turbulence-reducing baffle 127.
The turbulence reduction clapboard groove 16 is of a channel steel structure, and the width of the groove is 5 mm.
As shown in fig. 4, the buffer device 121 is composed of a steady flow bent plate 1212, a first side plate 1211 and a second side plate 1213, wherein the steady flow bent plate 1212 is formed by bending a stainless steel plate, and the first side plate 1211 and the second side plate 1213 are welded to two sides of the steady flow bent plate 1212; the buffer device part requires that the opening rate is 85%, the opening diameter is 4mm, and the wall thickness is 0.4mm, and the buffer device 121 is used for buffering the incoming flow, increasing the stability of the incoming flow and redistributing the incoming flow.
As shown in fig. 5-7, the honeycomb unit 124 is formed by tightly welding a thin-wall micro-perforated plate 1241 and a honeycomb device 1242, and the thin-wall micro-perforated plate 1241 is welded to the front end of the honeycomb device 1242; the honeycomb device 1242 is formed by arranging and welding square tube units 12421, the wall surfaces of the square tube units 12421 are provided with holes, the unit length is 200mm, the length-diameter ratio is 50, the material is stainless steel, the diameter of each hole is 0.3mm, and the center distance of each hole is 10 mm; wherein the thin-wall micro-orifice plate 1241 is a stainless steel thin plate with an opening, the wall thickness is 0.1mm, the opening diameter is 0.3mm, and the opening rate is 60%.
As shown in fig. 8, the first turbulence reduction partition plate 125 is made of stainless steel thin-wall steel plate, and a rectangular region with circular holes is uniformly formed in a distance of 20mm from the edge M of the partition plate, wherein the diameter of the opening of the first turbulence reduction partition plate 125 is 0.9mm, the opening rate is greater than 84%, the diameter of the opening of the second turbulence reduction partition plate 126 is 0.6mm, the opening rate is 72%, the diameter of the opening of the third turbulence reduction partition plate 127 is 0.3mm, and the opening rate is 58.5%; the first turbulence reduction partition plate 125, the second turbulence reduction partition plate 126 and the third turbulence reduction partition plate 127 are inserted into the turbulence reduction partition plate groove 16, so that the disassembly is convenient.
As shown in fig. 9, the application of the present invention in a water tank with test section size of 70mm x 70mm shows that the water tank mainly comprises: the device comprises a rectifying device 1, a contraction section 2, a test section 3, a power system 4, a backflow section 5, a bracket 6, a third corner 7 and a fourth corner 8; the rectifying device 1 used in the water tunnel or the water tank is arranged between the contraction section 2 and the fourth corner 8, and the connection mode is flange connection; the section of the rectifying device 1 used in a water tunnel or a water tank is 230mm multiplied by 240mm, and the size of the section of an inlet of a contraction section 2 is 230mm multiplied by 240 mm; wherein no part of the observation window 14 is present because the invention is applied in a sink.
Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should clearly recognize that the present invention is applicable to a water tunnel or sink fairing. The water tunnel or water tank rectifying device has the characteristics of flexible deployment, good quality of a changed flow field, small loss and relatively small overall size, and can meet different requirements for water tunnel or water tank design.
It should be noted that the above definitions of the components and methods are not limited to the specific structures, shapes or modes mentioned in the embodiments, and those skilled in the art can make simple modifications or substitutions.
It is also noted that the illustrations herein may provide examples of parameters that include particular values, but that these parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error tolerances or design constraints.
The invention is not the best known technology.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. 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 (7)
1. A rectifying device for a water tunnel or a water tank comprises a rectifying device (1), wherein the rectifying device (1) is of a horizontally arranged square box structure and comprises an inlet flange (11), a rectifying system (12), reinforcing rib plates (13), an observation window (14), an outlet flange (15), three turbulence reduction partition plates (16) and a rectifying chamber (17); the turbulence reduction baffle plate is characterized in that the rectifying chamber (17) is a square pipe formed by welding stainless steel pipes, a reinforcing rib plate (13) is welded on the outer wall of the square pipe, the inlet flange (11) is positioned at one end of the rectifying chamber (17) in the water inlet direction, the outlet flange (15) is positioned at one end of the rectifying chamber (17) in the water outlet direction, the three turbulence reduction baffle grooves (16) are arranged close to the outlet flange (15) in the vertical direction and in parallel, and the observation window (14) is connected to the upper side face of the rectifying chamber (17);
the method is characterized in that: the rectification system (12) is mounted in a rectification chamber (17) cavity, the rectification system (12) comprising: the turbulence reduction device comprises a buffer device (121), a first turbulence stabilizing plate (122), a second turbulence stabilizing plate (123), a honeycomb group (124), a first turbulence reduction partition plate (125), a second turbulence reduction partition plate (126) and a third turbulence reduction partition plate (127); a buffer device (121), a first flow stabilizing plate (122), a second flow stabilizing plate (123), a honeycomb group (124), a first turbulence reducing partition plate (125), a second turbulence reducing partition plate (126) and a third turbulence reducing partition plate (127) are sequentially arranged from one end of the inlet flange (11) to the direction of the outlet flange (15); and a first turbulence reduction partition plate (125), a second turbulence reduction partition plate (126) and a third turbulence reduction partition plate (127) are respectively arranged in the three turbulence reduction partition plate grooves (16); the distance between the buffer device (121) and the first flow stabilizing plate (122) is L1, the distance between the first flow stabilizing plate (122) and the second flow stabilizing plate (123) is L2-500 mm-800 mm, and the distance between the second flow stabilizing plate (123) and the honeycomb group (124) is L3-500 mm; the honeycomb device group (124) comprises a thin-wall micro pore plate (1241) and a honeycomb device (1242) which are welded, wherein the honeycomb device (1242) is formed by arranging and welding square pipe units (12421), the specifications of the square pipe units (12421) are the same, the thin-wall micro pore plate (1241) is a stainless steel plate with the thickness of 0.1mm, the stainless steel plate is provided with uniformly arranged round holes with the diameter of 0.3mm, and the aperture ratio of the stainless steel plate is 60%; a row of round holes with the diameter of 0.3mm are respectively formed in the longitudinal center positions of four wall surfaces of the square tube unit (12421), the distance between the holes is 10mm, and the ratio of the length of the honeycomb device to the equivalent diameter of the honeycomb device is 8-60; the distance between the honeycomb group (124) and the first turbulence reduction partition plate (125) is L4-50 mm, the distance between the first turbulence reduction partition plate (125) and the second turbulence reduction partition plate (126) is L5, and the distance between the second turbulence reduction partition plate (126) and the third turbulence reduction partition plate (127) is L6.
2. A fairing for a water tunnel or flume as recited in claim 1, further comprising: the buffer device (121) comprises a steady flow bent plate (1212), a first side plate (1211) and a second side plate (1213), wherein the steady flow bent plate (1212), the first side plate (1211) and the second side plate (1213) are made of stainless steel plates, the first side plate (1211) and the second side plate (1213) are welded on two sides of the steady flow bent plate (1212), the aperture ratio of the first side plate (1211), the aperture ratio of the second side plate (1213) and the steady flow bent plate (1212) is 85%, and the aperture diameter is 10 times of the thickness of the stainless steel plates.
3. A fairing for a water tunnel or flume as recited in claim 1, further comprising: when the rectifying chamber (17) is used for rectifying water tunnels, the upper side of the rectifying chamber (17) is closed and provided with an observation window (14), so that observation and equipment installation are facilitated; when the rectifying chamber (17) is used for rectifying the water tank, the rectifying chamber (17) is a U-shaped open groove body, and the observation window (14) is not installed.
4. A fairing for a water tunnel or flume as recited in claim 1, further comprising: the observation window (14) is made of a transparent organic glass plate, bolt holes and sealing grooves are formed in the periphery of the organic glass plate, and the organic glass plate is fixed on the rectifying chamber (17) through bolts; three turbulence-reducing baffle grooves (141) are arranged on the wall of the observation window (14), and the three turbulence-reducing baffle grooves (141) are groove bodies made of organic glass plates and are respectively used for containing the upper sides of the first turbulence-reducing baffle plate (125), the second turbulence-reducing baffle plate (126) and the third turbulence-reducing baffle plate (127).
5. A fairing for a water tunnel or flume as recited in claim 1, further comprising: turbulence reduction baffle groove (16) are the channel-section steel structure, and its groove width size is 1 ~ 5 mm.
6. A fairing for a water tunnel or flume as recited in claim 1, further comprising: the first turbulence reducing partition plate (125), the second turbulence reducing partition plate (126) and the third turbulence reducing partition plate (127) are all provided with circular holes uniformly in a rectangular area within a distance of 20mm from the edge M of the partition plate, wherein the diameter of the opening of the first turbulence reducing partition plate (125) is 0.9mm, the opening rate is greater than 80%, the diameter of the opening of the second turbulence reducing partition plate (126) is 0.6mm, the opening rate is greater than 70%, the diameter of the opening of the third turbulence reducing partition plate (127) is 0.3mm, and the opening rate is greater than 58%; the first turbulence reduction partition plate (125), the second turbulence reduction partition plate (126) and the third turbulence reduction partition plate (127) are respectively inserted into the three turbulence reduction partition plate grooves (16).
7. A fairing for a water tunnel or flume as recited in claim 1, further comprising: the L1 is 20-50 times of the diameter of the opening of the buffer device (121), the L5 is 30-50 times of the diameter of the opening of the first turbulence reduction partition plate (125), and the L6 is 30-50 times of the diameter of the opening of the second turbulence reduction partition plate (126).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911395885.9A CN111044257B (en) | 2019-12-30 | 2019-12-30 | Rectifying device for water tunnel or water tank |
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| CN201911395885.9A CN111044257B (en) | 2019-12-30 | 2019-12-30 | Rectifying device for water tunnel or water tank |
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| CN111504601A (en) * | 2020-05-25 | 2020-08-07 | 天津科技大学 | Adjustable fluid uniform flow experiment platform |
| CN113252293B (en) * | 2021-06-08 | 2021-10-01 | 中国空气动力研究与发展中心低速空气动力研究所 | Gas rectification structure inside box body |
| CN116358829B (en) * | 2023-03-22 | 2023-10-31 | 南京理工大学 | Water tank flow stabilizing device |
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| CN1207546C (en) * | 2001-05-16 | 2005-06-22 | 中国科学院力学研究所 | Low water level gravity type water-tunnel with large flow speed and low turbulence |
| JP5100049B2 (en) * | 2006-07-10 | 2012-12-19 | 株式会社西日本流体技研 | Circulating water tank device |
| CN103528789B (en) * | 2013-10-09 | 2015-12-02 | 哈尔滨工程大学 | Jet flow drag reduction effect of two-dimensional plane proving installation |
| CN105444986B (en) * | 2015-12-29 | 2018-11-16 | 国家海洋技术中心 | A kind of multifunctional vertical circulation makes stream test facilities |
| CN107063629B (en) * | 2017-04-12 | 2019-04-19 | 江苏科技大学 | A kind of underwater drag reduction surface performance testing device |
| CN109060300B (en) * | 2018-10-23 | 2020-04-10 | 河北工业大学 | Vertical water tunnel of heterogeneous stream that can two-way flow |
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