CN105424319B - Based on bionical submerged jet surface drag reduction test device - Google Patents
Based on bionical submerged jet surface drag reduction test device Download PDFInfo
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- CN105424319B CN105424319B CN201511015655.7A CN201511015655A CN105424319B CN 105424319 B CN105424319 B CN 105424319B CN 201511015655 A CN201511015655 A CN 201511015655A CN 105424319 B CN105424319 B CN 105424319B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
Based on bionical submerged jet surface drag reduction test device, including fluidic component, power input module, with water assembly, moving assembly, magnet fluid sealing component and signal processing component, the motor of power input module is connected by first shaft coupling with the input shaft of fluidic component, the output shaft of fluidic component is connected by second shaft coupling with the torque signal coupler of signal processing component, and signal processing component, fluidic component are all arranged on moving assembly；The water inlet tube connection of water inlet pipe and fluidic component with water assembly, the delivery port pipeline communication of outlet pipe and fluidic component with water assembly；Described fluidic component is sealed by axial seal component.The beneficial effects of the invention are as follows：Realize the test of jet surface drag-reduction effect and structured non-smooth surface drag-reduction effect is tested, when doing the assessment of jet surface structure drag-reduction effect, tests exemplar can process different pore size shape, pore size, arrangement mode, the jet pore structure at angle of inclination.
Description
Technical field
The present invention relates to a kind of based on bionical submerged jet surface drag reduction test device.
Background technology
The achievement in research of current drag reduction technology both domestic and external mainly has groove drag reduction method, soft wall approach, bubble method, Wall Vibration
Drag reduction method, coating drag reduction method, high polymer Drag Reduction With Additives method, joint drag reduction and bionical jet surface drag reduction etc..For drag reduction
Huge meaning, the drag reduction technology of development efficiently, environmentally friendly is devoted to both at home and abroad, and bionical jet surface drag reduction technology is always state
One of hot issue of inside and outside research.Its drag-reduction effect is obvious, and the course of work is environment friendly and pollution-free.For diversified drag reduction side
Method is, it is necessary to have a kind of test device to test the sample surface frictional resistance under this method, to assess subtracting for this method
Effect is hindered, then compares the quality of resistance reducing performance.
Most of traditional experimental rig of test of fluid friction resistance uses the experiments such as water hole, wind-tunnel, pond to set
Standby, using above-mentioned experimental technique means, not only volume is big, cost is high, and requires higher to experimental enviroment and need to expend greatly
The expense of amount, so as to all many-sided all by by certain limitation and restriction.Therefore, make experimentally to bionical jet
Sufacing carries out determining quantifier elimination just seeming important.
So the design of bionical jet flow drag reduction testing experiment platform should meet following 3 design requirements.
(1) bionical jet flow drag reduction testing experiment platform should have a small volume, simple in construction, cost is low, and test capability is strong
Feature, jet surface drag reduction testing experiment and can be done by different tests exemplars and do the test examination of non-smooth surface drag reduction
Test.Tests exemplar part on bionical jet flow drag reduction testing experiment platform loads will can be according to the needs of experiment at any time more
Change, and convenient disassembly.
(2) the data acquisition hardware system requirements design of bionical jet flow drag reduction testing experiment platform is simple, cost is low, is easy to
User's operation and maintenance, it is convenient that signal wire is drawn, and the signal of output is directly, accurately.The interface of data acquisition software system will
It is succinct directly perceived, the functions such as input setting, real-time collection, display and the storage of data of parameter can be completed.
(3) there is systematic error and random error in system, system compensation be carried out to system before the test, to ensure to be
System is maintained in rational error range.In test because being difficult to keep absolute stability, and also with inevitably making an uproar
Acoustic jamming, so the data collected have fluctuation, therefore effective data processing method should be used to obtain relatively satisfactory number
According to result.
The device that experimental rig can be tested as jet surface and non-smooth surface drag reduction.Tested when as jet flow drag reduction
During device, the tests exemplar drag size suffered in jet is measured using the moment of torsion on measurement testpieces.
Therefore, cheap, stable performance the small-sized resistance measurement device of R ＆ D design one is for bionic surface problem
Research there is positive effect.
The content of the invention
The present invention is directed to the problem of above-mentioned, it is proposed that a kind of experimental rig that bionical submerged jet surface is provided, simultaneously
The measure of merit of the test of jet surface drag-reduction effect and structured non-smooth surface drag reduction can be carried out by the device, it is desirable to test
Apparatus structure is simple, operation is easy, test is accurately based on bionical submerged jet surface drag reduction test device.
It is of the present invention based on bionical submerged jet surface drag reduction test device, it is characterised in that：Including jet portion
Part, power input module, with water assembly, moving assembly, magnet fluid sealing component and signal processing component, the input of described power
The motor of component is connected by first shaft coupling with the input shaft of described fluidic component, and the output shaft of described fluidic component leads to
Second shaft coupling is crossed with the torque signal coupler of described signal processing component to be connected, it is described signal processing component, described
Fluidic component all be arranged on described moving assembly on；The described water inlet pipe with water assembly enters with described fluidic component
Mouth of a river pipeline connection, the described outlet pipe and the delivery port pipeline communication of described fluidic component with water assembly；Described penetrates
Stream unit is sealed by magnet fluid sealing component；
Described fluidic component includes sealing cartridge module, outer barrel component, interior cartridge module, input shaft and output shaft, described
Sealing cartridge module, described outer barrel component and described interior cartridge module, coaxial arrangement forms three layers telescopic from outside to inside successively
Structure；The power intake of described input shaft is connected with the clutch end of described power input module, described outer barrel
Magnet fluid sealing component be housed, and described outer barrel component passes through corresponding magnet fluid sealing component and described on the right side of component
Seal cartridge module sealing, sealing drum right end cap of the described interior cartridge module sealing mounted in described input shaft through sealing cartridge module
Clutch end, and ensure described interior cartridge module and described input shaft run-in synchronism；The power of described output shaft is defeated
Enter end and the outer barrel left end cap of described outer barrel component is tightly connected, the clutch end of described output shaft passes through the second shaft coupling
Device is connected with described signal processing component；
Described includes tank, centrifugal pump, water inlet pipe and outlet pipe with water assembly, and the water inlet of described centrifugal pump passes through
Pipeline is introduced in described tank, and the delivery port of described centrifugal pump is connected with the water inlet end of described water inlet pipe, and described enters
The water side of water pipe is connected with the blasthole of described sealing cartridge module, water inlet end and the sealing cartridge module of described outlet pipe
Apopore is connected, and the water side of described outlet pipe is introduced in described tank, realizes the circulation of test water；Described water inlet
Flowmeter and pressure gauge, described outlet pipe is set to be provided with ball valve on pipe；
Described moving assembly includes bottom bracket, V-type rail and V-type rail mobile platform, and described V-type rail is horizontal
Installed in the top of described support, described V-type rail mobile platform is slidably connected with described V-type rail, described V-type
Described signal processing component is installed, described fluidic component, described power output component are respectively mounted on guide rail mobile platform
On described bottom bracket, and keep described signal processing component, described fluidic component and described power output group
Part is on same axis；
Described signal processing component includes torque signal coupler base, keyway plate, torque signal coupler and signal
Processor, described torque signal coupler base are arranged on described V-type rail mobile platform, described torque signal coupling
The described keyway plate of clutch pedestal top installation, one end of described torque signal coupler are arranged on described keyway plate,
The other end is connected by second shaft coupling with the clutch end of described output shaft；The signal of described torque signal coupler
Output end is connected with the signal processor signal of outside.
Described sealing cartridge module includes sealing drum, sealing drum left end cap and sealing drum right end cap with blasthole, institute
Sealing drum left end cap, the sealing drum right end cap stated are sealingly mounted at the both ends of described sealing drum respectively；Described outer barrel component
The inside of described sealing drum is arranged on, described outer barrel component includes tubular tests exemplar, outer barrel left end cap and outer barrel right-hand member
Lid, described outer barrel left end cap and described outer barrel right end cap are sealingly mounted at the both ends of described tests exemplar respectively, and
It is furnished with magnet fluid sealing component on the outside of described outer barrel right end cap, described outer barrel right end cap passes through corresponding magnet fluid sealing group
Part realizes the sealing between outer barrel right end cap and sealing drum right end cap round platform；It is left that described interior cartridge module includes inner cylinder, inner cylinder
End cap and inner cylinder right end cap, wherein described inner cylinder left end cap and described inner cylinder right end cap are sealingly mounted at described inner cylinder
Both ends, the output end of described inner cylinder right end cap and described input shaft are spirally connected, and keep inner cylinder right end cap, described outer barrel right-hand member
Lid and described sealing drum right end cap are coaxial.
Described sealing drum upper wall is provided with the first screwed hole for being vented, and the lower wall of described sealing drum, which is provided with, to be used to arrange
Second screwed hole of water, the first described screwed hole and the second screwed hole are provided with corresponding sealing bolt；Described sealing drum
Blasthole above be welded with to connect the screw boss of water-supply-pipe.
Described magnet fluid sealing component includes annular permanent magnet, two pieces of identical poles being engaged with permanent magnet
Boots, there is teeth groove on every piece of pole shoe inwall or outer wall；Two pieces of pole shoes, the revolving part for forming relative motion and pole shoe and revolving part it
Between gap form magnetic circuit, formed and be sealed in magnetic seal on revolving part.
The outside of described output shaft is socketed left connecting cylinder, and one end of left connecting cylinder is left with described sealing drum by bolt
End cap is affixed, and keeps left connecting cylinder and sealing drum left end cap coaxial；The other end of left connecting cylinder is equipped with left connecting cylinder end cap,
Equipped with a set of described magnet fluid sealing component between described left connecting cylinder and described output shaft, wherein left connecting cylinder is interior
Two pieces of pole shoe interference fits of hole and magnet fluid sealing component, between two pieces of pole shoes, output shaft and pole shoe and output shaft between
Gap forms magnetic circuit, forms the magnetic seal being sealed on output shaft.
Adjust pad is accompanied between described left connecting cylinder and described sealing drum left end cap, and described sealing drum is left
The mounting hole of end cap is embedded with water-sealed bearing, is furnished with deep groove ball bearing at described left connecting cylinder end cap, described output shaft
Both ends are on corresponding deep groove ball bearing and described water-sealed bearing.
The outside of described input shaft is socketed right connecting cylinder, wherein one end of right connecting cylinder and described sealing drum right end cap
Affixed, the other end is equipped with corresponding bearing air cover；Accompany and be used between described right connecting cylinder and described sealing drum right end cap
The felt collar end cap of sealing；Be embedded with water-sealed bearing at the mounting hole of described sealing drum right end cap, described right connecting cylinder with it is described
Input shaft between gap be furnished with deep groove ball bearing, the both ends of described input shaft are mounted in corresponding water-sealed bearing and deep-groove ball
On bearing；The input of described input shaft is furnished with the felt collar for sealing, and felt collar is interference fit with input shaft.
The inner surface of described sealing drum right end cap is provided with axial round platform, described outer barrel right end cap and described sealing drum
It is furnished with another set of magnet fluid sealing component between the round platform of right end cap, the wherein endoporus of outer barrel right end cap and corresponding magnetic fluid is close
Two pieces of pole shoe interference fits of sealing assembly, the gap between two pieces of pole shoes, round platform and pole shoe and round platform form magnetic circuit, shape
Into the magnetic seal being sealed on round platform.
Described first shaft coupling nullifies shaft coupling for elasticity, and described second shaft coupling is blossom type shaft coupling.
Described left connecting cylinder is made of non-magnet material aluminium alloy.
It is furnished with positive stop in the end of described V-type rail.
Magnet fluid sealing component in the present invention is magnet fluid sealing, by annular permanent magnet (N-S), pole shoe and rotation
The magnetic circuit that axle is formed, under magnetic fields caused by magnet, the magnetic fluid being placed between axle and pole shoe top gap
Concentrated, form it into the "O" ring of one, gap passage is blocked to the purpose for reaching sealing.Magnet fluid sealing is because be
The sealing that liquid is formed, as long as in the pressure differential range of permission, it is possible to achieve zero leakage, and be non-contacting seal, no
Can be in the friction of potted component and rotary shaft, therefore the accuracy of torque measurement can be improved, to system test result without obvious
Interference.Left connecting cylinder is made of non-magnet material aluminium alloy, its endoporus and two pieces of pole shoe interference fits.Felt is used at input shaft
Circle sealing, felt collar end cap is connected on sealing drum right end cap by bolt, and to prevent fluid from leaking, felt collar and input shaft are interference
Coordinate.Magnet fluid sealing is used between tests exemplar right end cap and sealing drum right end cap；Centrifugal pump with water assembly is from tank
Liquid is extracted to be sent into water inlet pipe by pipe, and by installed on pipe valve, in pressure gauge and flowmeter control pipe water flow velocity；This
Experimental design V-type rail platform is used for the replacing of tests exemplar.On moving platform device, sealing drum left end cap is straight by floor
Connect and be welded on V-type rail.After experiment is finished every time, water unnecessary in sealing drum is first discharged, after water is drained, turns on sealing drum
Screw on left end cap, V-type rail is moved outward together with the device on guide rail, when being moved to suitable position, by V-type rail
Fix, then change the tests exemplar on outer barrel, after more finishing changing tests exemplar, whole device is moved along, after fixing, even
Screw is connected, starts again at and tests next time.
The TT＆C software part of the signal processor of this Test Data Acquisition System is write by LabVIEW.Motor passes through input
After axle drives interior cartridge module rotation, interior cartridge module is inconjunction with fluid and rotated together, and tests exemplar is rubbed by the frictional resistance of fluid
Wipe resistance and change into moment of torsion by output shaft measured by torque signal coupler.The simulation letter that torque signal coupler collects
Number by transmitter conversion, amplification and filtering processing, the signal that sensor is collected be converted to can and data acquisition module
The analog signal of block connection, analog signal carry out A/D conversions by data acquisition module, and being changed into can be stored by signal processor
Data signal, be stored in signal processor.
The fluid media (medium) that this experimental rig uses is environment friendly and pollution-free for water.In order that whole experimental rig is more efficient
Ground is run, and having opened individual screwed hole on sealing drum is used for connecting bolt.Centrifugal pump one end pulls water out, and will by certain pressure
Hydraulic pressure oral siphon.Around here, high-velocity flow is by the entrance inflow by flowmeter, and is flowed out from its outlet.The effect of flowmeter is to use
The flow velocity of water during calculating exit flow, for being carried with different jet velocity jet and the process of comparative analysis during device experiment
More structurally sound foundation is supplied.Then, can be entered into the water of sealing drum by the through hole in tests exemplar in cavity, now chamber
Internal air can be discharged with the screwed hole on sealing drum, and bolt is screwed on when water did not had screwed hole, now opens drainpipe
On PVC ball valves, the water in cavity can be flowed back in return flume by the through hole on end cover, complete the jet mistake of whole device
Journey.This process medium fluid will be back to tank via device drain outlet, complete recycling for water, economize on resources.Testing
During completion, the bolt that can turn on sealing drum lower end discharges unnecessary water.
The beneficial effects of the invention are as follows：Realize the test of jet surface drag-reduction effect and structured non-smooth surface drag reduction is imitated
Fruit is tested, and when doing jet surface structure drag-reduction effect and assessing, it is big that tests exemplar can process different pore size shape, aperture
Small, arrangement mode, the jet pore structure at angle of inclination；When doing the assessment of structured non-smooth surface drag-reduction effect, tests exemplar table
Face can also process different ridge-like structures, such as bowl configurations, bulge-structure, square type structure；Or coated on tests exemplar surface
Coating.Torque signal value in the case of different tests exemplar is gathered by data collecting system, comparing is carried out, obtains not
With the drag-reduction effect of surface texture, structured non-smooth surface and the property of reduction drag of jet surface structure are studied.Data collecting system
Simple in construction, operation is easy, and test is accurate.After the completion of the experiment of certain situation tests exemplar, tests exemplar only need to be changed,
For this experimental design V-type rail platform for tests exemplar with changing, this Renewal process is simple, operation is easy, saves the time, reduction
Use cost；Water supply part, can be accurate by coordinating the components such as centrifugal pump, PVC ball valves, pressure gauge, turbine flowmeter
The effluxvelocity of Control experiment model, simulate different effluxvelocity environment；Magnet fluid sealing is used at revolution dynamic sealing, is had
There is its long lifespan, without abrasion, the friction that zero leakage can be realized, potted component and rotary shaft will not be produced, therefore can improve
The accuracy of torque measurement.
Brief description of the drawings
Fig. 1 is the structure chart of the present invention.
Fig. 2 is the top view of the present invention.
Fig. 3 is the side view of the present invention.
Fig. 4 is the structure chart of the fluidic component of the present invention.
Fig. 5 is the top view of the fluidic component of the present invention.
Fig. 6 is the side view of the fluidic component of the present invention.
Fig. 7 is enlarged drawing at Fig. 4 A.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings
Referring to the drawings：
Embodiment 1 is of the present invention based on bionical submerged jet surface drag reduction test device, including fluidic component 1,
It is power input module 2, defeated with water assembly 3, moving assembly 4, magnet fluid sealing component 5 and signal processing component 6, described power
The motor for entering component 2 is connected by first shaft coupling 7 with the input shaft of described fluidic component 1, described fluidic component 1 it is defeated
Shaft is connected by second shaft coupling 8 with the torque signal coupler of described signal processing component 6, described signal transacting group
Part 6, described fluidic component 1 are all arranged on described moving assembly 4；The described water inlet pipe with water assembly 3 with it is described
The water inlet tube connection of fluidic component 1, the described outlet pipe and the water outlet pipe of described fluidic component 1 with water assembly 3
Road connects；Described fluidic component 1 is sealed by magnet fluid sealing component 5；
Described fluidic component 1 includes sealing cartridge module 11, outer barrel component 12, interior cartridge module 13, input shaft 14 and output
Axle 15, described sealing cartridge module 11, described outer barrel component 12 and described interior cartridge module 13 are coaxial from outside to inside successively to arrange
Cloth forms three layers of telescoping structure；The power of the power intake of described input shaft 14 and described power input module 2
Output end is connected, and the described right side of outer barrel component 12 is equipped with magnet fluid sealing component 5, and described outer barrel component 12 passes through phase
The magnet fluid sealing component 5 answered seals with described sealing cartridge module 11, and the sealing of described interior cartridge module 13 is mounted in described defeated
Enter axle 14 through the clutch end of the sealing drum right end cap of sealing cartridge module 11, and ensure described interior cartridge module 13 with it is described
The run-in synchronism of input shaft 14；The power intake of described output shaft 15 and the outer barrel left end cap of described outer barrel component 12 are close
Envelope connection, the clutch end of described output shaft 15 are connected by second shaft coupling 8 with described signal processing component 6；
Described includes tank 31, centrifugal pump 32, water inlet pipe 33 and outlet pipe 34, described centrifugal pump 32 with water assembly 3
Water inlet introduced by pipeline in described tank 31, the delivery port of described centrifugal pump 32 enters with described water inlet pipe 33
Water end (W.E.) is connected, and the water side of described water inlet pipe 33 is connected with the blasthole of described sealing cartridge module 11, described outlet pipe
34 water inlet end connects with sealing the apopore of cartridge module 11, and the water side of described outlet pipe 34 introduces described tank 31
It is interior, realize the circulation of test water；Flowmeter 331, pressure gauge 332 and first is set to control ball valve on described water inlet pipe 33
333, described outlet pipe 34 is provided with the second control ball valve 341；
Described moving assembly 4 includes bottom bracket 41, V-type rail 42 and V-type rail mobile platform 43, described V-type
The level of guide rail 42 is welded on the top of described support 41, and described V-type rail mobile platform 43 is slided with described V-type rail 42
Dynamic connection, installs described signal processing component 6 on described V-type rail mobile platform 43, described fluidic component 1, described
Power output component 2 be installed on described bottom bracket 41, and keep described signal processing component 6, described penetrate
Stream unit 1 and described power output component 2 are on same axis；
Described signal processing component 6 includes torque signal coupler base 61, keyway plate 62, torque signal coupler 63
And signal processor, described torque signal coupler base 61 is arranged on described V-type rail mobile platform 43, described
The described keyway plate 62 of the top of torque signal coupler base 61 installation, one end of described torque signal coupler 63 is arranged on
On described keyway plate 62, the other end is connected by second shaft coupling 8 with the clutch end of described output shaft 15；Described
The signal output part of torque signal coupler 63 is connected with the signal processor signal of outside.
It is right that described sealing cartridge module 11 includes the sealing drum 111 with blasthole, sealing drum left end cap 112 and sealing drum
End cap 113, described sealing drum left end cap 112, sealing drum right end cap 113 are sealingly mounted at described sealing drum 111 respectively
Both ends；Described outer barrel component 12 is arranged on the inside of described sealing drum 111, and described outer barrel component 12 is tested including tubular
Exemplar 121, outer barrel left end cap 122 and outer barrel right end cap 123, described outer barrel left end cap 122 and described outer barrel right end cap 123
The both ends of described tests exemplar 121 are sealingly mounted at respectively, and the described outside of outer barrel right end cap 123 is close equipped with magnetic fluid
Sealing assembly 5, described outer barrel right end cap 123 realize outer barrel right end cap 123 and sealing drum by corresponding magnet fluid sealing component 5
Sealing between the round platform of right end cap 113；Described interior cartridge module 13 includes inner cylinder 131, inner cylinder left end cap 132 and inner cylinder right-hand member
Lid 133, wherein described inner cylinder left end cap 132 and described inner cylinder right end cap 133 are sealingly mounted at the two of described inner cylinder 131
End, the output end of described inner cylinder right end cap 133 and described input shaft 14 is spirally connected, keep inner cylinder right end cap 133, it is described outside
Cylinder right end cap 123 and described sealing drum right end cap 113 are coaxial.
The described upper wall of sealing drum 111 is provided with the first screwed hole for being vented, and the lower wall of described sealing drum, which is provided with, to be used
In the second screwed hole of draining, the first described screwed hole and the second screwed hole are provided with corresponding sealing bolt；Described is close
It is welded with to connect the screw boss 1113 of water-supply-pipe above the blasthole of sealed tube 111.
Described magnet fluid sealing component 5 is engaged identical including 51, two pieces of annular permanent magnet with permanent magnet
Pole shoe 52, have teeth groove on every piece of inwall of pole shoe 52 or outer wall；Two pieces of pole shoes 52, the revolving part and pole shoe for forming relative motion
Gap between revolving part forms magnetic circuit, forms the magnetic seal being sealed on revolving part.
The outside of described output shaft 15 is socketed left connecting cylinder 151, one end of left connecting cylinder 151 by bolt with it is described
Sealing drum left end cap 112 is affixed, and keeps left connecting cylinder 151 and sealing drum left end cap 112 coaxial；Left connecting cylinder 151 it is another
One end is equipped with left connecting cylinder end cap, is furnished between the gap between described left connecting cylinder 151 and described output shaft 15 a set of
Described magnet fluid sealing component 5, wherein two pieces of transition of pole shoe 52 of the endoporus of left connecting cylinder 151 and magnet fluid sealing component 5
Coordinate, two pieces of pole shoes 52, magnetic circuit, formation are formed as the gap between the output shaft and pole shoe and output shaft of revolving part
The magnetic seal being sealed on output shaft.
Adjust pad 114 is accompanied between described left connecting cylinder 151 and described sealing drum left end cap 112, and it is described
The mounting hole of sealing drum left end cap 112 be embedded with water-sealed bearing 1121, be furnished with deep-groove ball axle at described left connecting cylinder end cap
153 are held, the both ends of described output shaft 15 are on corresponding deep groove ball bearing 153 and described water-sealed bearing 1121.
The outside of described input shaft 14 is socketed right connecting cylinder 141, wherein one end of right connecting cylinder 141 and described sealing
Cylinder right end cap 113 is affixed, and the other end is equipped with corresponding bearing air cover 143；Described right connecting cylinder 141 is right with described sealing drum
The felt collar end cap 144 for sealing is accompanied between end cap 113；Waterproof is embedded with the mounting hole of described sealing drum right end cap 113
Bearing 146, the gap between described right connecting cylinder 141 and described input shaft 14 are furnished with deep groove ball bearing 145, and described is defeated
Enter the both ends of axle 14 on corresponding water-sealed bearing 146 and deep groove ball bearing 145；The input of described input shaft 14 is furnished with
For the felt collar 147 of sealing, felt collar 147 is interference fit with input shaft 14.
The inner surface of described sealing drum right end cap 113 is provided with axial round platform 1131, described outer barrel right end cap 123 and institute
It is furnished with another set of magnet fluid sealing component 5 between the round platform 1131 for the sealing drum right end cap 113 stated, wherein right connecting cylinder 141
Two pieces of interference fits of pole shoe 52 of endoporus and corresponding magnet fluid sealing component 5, two pieces of pole shoes 52, round platform 1131 and pole shoe with
Gap between round platform forms magnetic circuit, forms the magnetic seal being sealed on round platform 1131.
Described first shaft coupling 7 nullifies shaft coupling for elasticity, and described second shaft coupling 8 is blossom type shaft coupling.
Described left connecting cylinder 151 is made of non-magnet material aluminium alloy.
It is furnished with positive stop 421 in the end of described V-type rail 42.
Magnet fluid sealing component in the present invention is magnet fluid sealing, by annular permanent magnet (N-S), pole shoe and rotation
The magnetic circuit that axle is formed, under magnetic fields caused by magnet, the magnetic fluid being placed between axle and pole shoe top gap
Concentrated, form it into the "O" ring of one, gap passage is blocked to the purpose for reaching sealing.Magnet fluid sealing is because be
The sealing that liquid is formed, as long as in the pressure differential range of permission, it is possible to achieve zero leakage, and be non-contacting seal, no
Can be in the friction of potted component and rotary shaft, therefore the accuracy of torque measurement can be improved, to system test result without obvious
Interference.Left connecting cylinder is made of non-magnet material aluminium alloy, its endoporus and two pieces of pole shoe interference fits.Felt is used at input shaft
Circle sealing, felt collar end cap is connected on sealing drum right end cap by bolt, and to prevent fluid from leaking, felt collar and input shaft are interference
Coordinate.Magnet fluid sealing is used between tests exemplar right end cap and sealing drum right end cap；Centrifugal pump with water assembly is from tank
Liquid is extracted to be sent into water inlet pipe by pipe, and by installed on pipe valve, in pressure gauge and flowmeter control pipe water flow velocity；This
Experimental design V-type rail platform is used for the replacing of tests exemplar.On moving platform device, sealing drum left end cap is straight by floor
Connect and be welded on V-type rail.After experiment is finished every time, water unnecessary in sealing drum is first discharged, after water is drained, turns on sealing drum
Screw on left end cap, V-type rail is moved outward together with the device on guide rail, when being moved to suitable position, by V-type rail
Fix, then change the tests exemplar on outer barrel, after more finishing changing tests exemplar, whole device is moved along, after fixing, even
Screw is connected, starts again at and tests next time.
The TT＆C software of the signal processor of this Test Data Acquisition System is write by LabVIEW.Motor passes through input shaft
After driving interior cartridge module rotation, interior cartridge module is inconjunction with fluid and rotated together, and tests exemplar is by the frictional resistance of fluid, friction
Resistance changes into moment of torsion by output shaft measured by torque signal coupler.The analog signal that torque signal coupler collects
By the processing of the conversion of transmitter, amplification and filtering, the signal that sensor is collected is converted to energy and data acquisition module
The analog signal of connection, analog signal carry out A/D conversions by data acquisition module, are changed into what can be stored by signal processor
Data signal, it is stored in signal processor.
The fluid media (medium) that this experimental rig uses is environment friendly and pollution-free for water.In order that whole experimental rig is more efficient
Ground is run, and having opened individual screwed hole on sealing drum is used for connecting bolt.Centrifugal pump one end pulls water out, and will by certain pressure
Hydraulic pressure oral siphon.Around here, high-velocity flow is by the entrance inflow by flowmeter, and is flowed out from its outlet.The effect of flowmeter is to use
The flow velocity of water during calculating exit flow, for being carried with different jet velocity jet and the process of comparative analysis during device experiment
More structurally sound foundation is supplied.Then, can be entered into the water of sealing drum by the through hole in tests exemplar in cavity, now chamber
Internal air can be discharged with the screwed hole on sealing drum, and bolt is screwed on when water did not had screwed hole, now opens drainpipe
On PVC ball valves, the water in cavity can be flowed back in return flume by the through hole on end cover, complete the jet mistake of whole device
Journey.This process medium fluid will be back to tank via device drain outlet, complete recycling for water, economize on resources.Testing
During completion, the bolt that can turn on sealing drum lower end discharges unnecessary water.
Installation process：The installation of fluidic component：Adjust pad is loaded into outer barrel right end cap, then turned left from the right side by a set of magnetic current
Body seal assembly is engaged with outer barrel right end cap, and circlip for hole is loaded on outer barrel right end cap as magnet fluid sealing part
Axially position.The purpose for setting device for sealing magnetic fluid herein is the leakage for reducing liquid to outer barrel component inner chamber body, is improved
The accuracy of experiment.Gasket seal is inserted in respectively on outer barrel left end cap and outer barrel right end cap, outer barrel left end cap and outer barrel right-hand member
Lid is connected in tests exemplar left and right ends by bolt.Output shaft is by screw threads for fastening on outer barrel left end cap.By water-sealed bearing
Installed in sealing drum left end cap correspondence position, the output shafting worked good combination is turned left loading by sealing drum left end cap from the right side,
Axial restraint is carried out to bearing.
Adjust pad, magnet fluid sealing part, adjust pad are sequentially loaded into left connecting cylinder；By screw by left connection
Cylinder end cap is connected on left connecting cylinder；This part connected is inserted in from the left end of output shaft again, is connected by screw close
On sealed tube left end cap.Rolling bearing is loaded from the left end of output shaft, bearing (ball) cover is fixed on by left connecting cylinder end by screw
Cover so as to realize the axially position to rolling bearing.
According to installation method similar at output shafting combination, the corresponding positions by water-sealed bearing installed in sealing drum right end cap
Put, turned left from the right side and load input shaft, the axially position to water-sealed bearing is realized using the shaft shoulder.Gasket seal is respectively charged into inner cylinder
Left end cap with inner cylinder right end cap, being connected by screw on inner cylinder respectively.In order to mitigate pressure of the interior cartridge module to output shaft end
Power, inner cylinder select PVC material, and interior cartridge module is hollow, and the gasket seal on inner cylinder left end cap and inner cylinder right end cap is to prevent
Water in cavity is leaked into interior cartridge module.The interior cartridge module combined is realized by the screw thread on inner cylinder right end cap and input shaft
Connection.Sealed on input shaft using felt collar, felt-ring seal original paper felt collar end cap is loaded to the relevant position of input shaft, then will
Right connecting cylinder is inserted on input shaft, and right connecting cylinder and felt collar end cap are fixed on sealing drum right end cap by screw.It will roll
Bearing is turned left from the right side to be loaded on input shaft.Bearing (ball) cover equipped with felt collar is connected by screw on right connecting cylinder, realization pair
The axial restraint of bearing.
Load gasket seal in the corresponding position of the combination of output shafting and input shafting combination.Will output shafting combination from
Load relevant position on sealing drum from left to right and be connected by screw fixation again；Input shafting combination is turned left from the right side and loads sealing drum
Upper relevant position is attached fixation by screw.
After the assembling of fluidic component is completed.Fluidic component is welded on test platform by floor, guarantee test device
The stability of the course of work.The shaft extension of frequency modulation motor is nullified shaft coupling by elasticity with input shaft and is connected.To ensure installation essence
Degree, it is ensured that the shaft extension of motor is in the same horizontal position with input shaft, and frequency modulation motor is arranged on test platform by motor support base
On.
Torque signal coupler one end is fixed on keyway plate by key, and the other end is connected to defeated by blossom type shaft coupling
On shaft, using the numerical value measured by torque signal coupler as test data, and recorded.Torque signal is coupled simultaneously
On device in the suffered numerical value deposit computer measured, the torque data that different tests exemplars collects is different, so according to difference
Torque signal learn the resistance situation that tests exemplar is subject to and then calculate drag reducing efficiency.
When assembling jet feed system, screw boss is welded in corresponding position on sealing drum, jet inlet pipeline leads to
The externally threaded pvc pipe of one end band is crossed to be connected in screw boss.The jet water inlet pipe other end is connected to the outlet conduit of centrifugal pump
On, the water in tank is delivered into sealing drum by centrifugal pump.On jet outlet pipe one end connection sealing drum right end cap
Water outlet, the other end are placed among tank.The hole more bigger than jet outlet pipe is provided with motor support base to penetrate for placement
Water pipe is flowed out, shares the weight of jet outlet conduit, is easy to the stability of overall pipe fitting.Have on sealed cylinder for exhaust
Screwed hole and the lower screwed hole for draining.As shown in Figure 7.Flowmeter, pressure are installed respectively on jet oral siphon simultaneously
Table, PVC ball valves, there are PVC ball valves jet outlet pipe is installed above, can be counted by the data for reading jet oral siphon flowmeter
Jet orifice jet flow size is calculated, by jet water inlet pipe and jet outlet pipe flow-rate ratio compared with can leak fluidic system
Quantified, the size of piping flow is adjusted by the PVC ball valves on fluid conduit.On the pipeline of jet feed system due to
The parts such as flowmeter, pressure gauge are installed so that the overall heavy burden of pipeline is bigger.In pressure gauge and the medium design of flowmeter
There is support frame, support frame will share the weight of whole jet water inlet pipe pipeline, and support frame is bolted in test platform
On relevant position.
The operation principle of jet feed system is：The PVC ball valves on drainpipe are tightened first, turn on the spiral shell on sealing drum
Bolt, water will be filled with tank, pulled water out by centrifugal pump one end, and by certain pressure by hydraulic pressure oral siphon.Around here, at a high speed
Current flow out the entrance inflow by flowmeter from its outlet.The stream of water when the effect of flowmeter is for calculating exit flow
Speed, to provide more structurally sound foundation during device experiment with different jet velocity jet and the process of comparative analysis.
Then, can be entered into the water in sealed cylinder by the through hole in tests exemplar in cavity, now the air in sealed cylinder
It can be discharged with the screwed hole on sealing drum, bolt is screwed on when water did not had screwed hole, now open the PVC balls on drainpipe
Valve, the water in cavity can be flowed back in return flume by the through hole on sealing drum right end cap, complete the jet process of whole device.This
Process medium fluid will be back to tank via device drain outlet, complete recycling for water, economize on resources.Completed in experiment
When, the bolt that can turn on sealing drum lower end discharges unnecessary water.
V-type rail mobile platform is mainly made up of signal coupler pedestal, V-type rail platform, V-type rail, postive stop baffle.
Torque signal coupler and keyway plate are combined, torque signal coupler are carried out by key circumferentially fixed.Torque signal couples
Device is connected by screw on keyway plate, and keyway plate is connected by screw on torque signal coupler base.Torque signal coupling
Clutch pedestal is connected by screw on V-type rail platform, and the sealing drum left end cap in fluidic component is welded in V-type by floor 64
On guide rail platform.V-type rail platform is enclosed on V-type rail, tightening and loosening and realize the shifting of V-type rail platform using bolt
It is dynamic.Wherein V-type rail is directly welded in relevant position on testing stand.Postive stop baffle be fixed by screws on testing stand play it is spacing
Effect.
The operation principle of V-type rail mobile platform is as follows:After experiment is finished every time, it is unnecessary in sealing drum first to discharge
Water, after water is drained, the screw on sealing drum left end cap is turned on, the bolt on V-type rail platform is unclamped, by V-type rail platform
On device move outward together, when being moved to suitable position, the bolt tightened on V-type rail platform consolidates V-type rail platform
Live calmly, then change the tests exemplar on outer barrel, after more finishing changing tests exemplar, whole device is moved along, after fixing, connection
Good screw, starts again at and tests next time.
When being tested as structured non-smooth surface, smooth surface structure tests exemplar is done respectively (if being set in tests exemplar
Dry limbers) and several groups of required structured non-smooth surfaces tests exemplar check experiment.According to assembling process, experiment is filled
It is good to put once mounting, tightens PVC ball valves, turns on the bolt in upper screwed hole, is flowed by jet oral siphon to being injected in sealing drum
Body, when there is stabilized fluid outflow in upper screwed hole, illustrate to fill with fluid in sealing drum, bolt is now screwed on into upper screw thread
Hole simultaneously closes off PVC ball valves and stops supplying water by centrifugal pump.During experiment, by frequency converter regulation motor in several groups of different rotating speeds
In the case of, the signal value measured by corresponding lower torque signal coupler under different rotating speeds is put by transmitter to signal
Analog signal is conveyed to capture card after big filtering, and computer is delivered to by capture card, by respective data storage in computer
In.After the completion of smooth surface structure situation, by turning on the bolt in lower screwed hole by the drain in sealing drum, utilization
V-type rail mobile platform takes out smooth tests exemplar.When tests exemplar is structured non-smooth surface, according to above same steps
Operated.During experiment, adjusting frequency converter successively makes the class of motor several groups of rotating speeds more than, and data in capture card are adopted
Collect, store successively in computer.After several groups of tests exemplar situations are sequentially completed, all data are compareed, analyzed, located
Reason, it was therefore concluded that.When doing structured non-smooth surface experiment, it is not necessary to provide fluid to jet inlet pipeline.Tests exemplar surface
Applying coating test operation process is consistent with structured non-smooth surface experiment process.
It is according to assembling process, experimental rig once mounting is good during stream test, before electric motor starting, tighten
PVC ball valves, turn on bolt, open centrifugal pump and are supplied water into sealing drum and seen in screwed hole when having the water to emerge, screw on bolt simultaneously
Open PVC ball valves.After electric motor starting, required rotating speed is reached by frequency converter regulation motor, because tests exemplar surface is provided with
Jet orifice, under the effect of the pressure, fluid project from jet orifice to inner cylinder direction.And inner cylinder surrounding fluid is due to jet reason,
Need excessive, discharged excess fluid by the jet outlet pipe on sealing drum right end cap, ensure in sealing drum all the time full of stream
Body, and pressure is atmospheric pressure state.Fluid enters fluidic device system from tank by jet water inlet pipe, and tests exemplar passes through
Jet orifice is to inner cylinder direction jet, and excess fluid flows into tank by jet outlet pipe in sealing drum, and fluid circulation supplies in tank
Give.Regulation frequency converter makes motor go out data acquisition in capture card, successively in the class of several groups of rotating speeds of required control successively
Store in computer.When doing smooth surface check experiment, because jet situation is not present in tests exemplar surface, therefore work as jet
After lumen portion is full of fluid between water cavity segment, sealing drum and tests exemplar around entrance pipe inner chamber, inner cylinder, by jet
PVC ball valves on PVC ball valves and jet outlet pipe on water inlet pipe are closed.It is right after several groups of tests exemplar situations are sequentially completed
All data are compareed, analyzed, handled, and are finally drawn a conclusion.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes art technology
Personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (10)
1. based on bionical submerged jet surface drag reduction test device, it is characterised in that：Including fluidic component, power input group
Part, lead to water assembly, moving assembly, magnet fluid sealing component and signal processing component, the motor of described power input module
The input shaft that first shaft coupling is crossed with described fluidic component is connected, and the output shaft of described fluidic component passes through second shaft coupling
It is connected with the torque signal coupler of described signal processing component, described signal processing component, described fluidic component are all
On described moving assembly；The described water inlet pipe with water assembly and the water inlet tube of described fluidic component connect
Connect, the described outlet pipe and the delivery port pipeline communication of described fluidic component with water assembly；Described fluidic component passes through
Magnet fluid sealing component seals；
Described fluidic component includes sealing cartridge module, outer barrel component, interior cartridge module, input shaft and output shaft, described sealing
Coaxial arrangement forms three layers of telescopic knot from outside to inside successively for cartridge module, described outer barrel component and described interior cartridge module
Structure；The power intake of described input shaft is connected with the clutch end of described power input module, described outer barrel group
Magnet fluid sealing component is housed on the right side of part, and described outer barrel component by corresponding magnet fluid sealing component with it is described close
Sealed tube component seals, and the sealing of described interior cartridge module passes through the sealing drum right end cap of sealing cartridge module mounted in described input shaft
Clutch end, and ensure described interior cartridge module and described input shaft run-in synchronism；The power input of described output shaft
End and the outer barrel left end cap of described outer barrel component are tightly connected, and the clutch end of described output shaft passes through second shaft coupling
It is connected with described signal processing component；
Described includes tank, centrifugal pump, water inlet pipe and outlet pipe with water assembly, and the water inlet of described centrifugal pump passes through pipeline
Introduce in described tank, the delivery port of described centrifugal pump is connected with the water inlet end of described water inlet pipe, described water inlet pipe
Water side be connected with the blasthole of described sealing cartridge module, the water outlet of the water inlet end of described outlet pipe and sealing cartridge module
Hole is connected, and the water side of described outlet pipe is introduced in described tank, realizes the circulation of test water；On described water inlet pipe
Flowmeter and pressure gauge, described outlet pipe is set to be provided with ball valve；
Described moving assembly includes bottom bracket, V-type rail and V-type rail mobile platform, and described V-type rail is horizontally mounted
On the top of described support, described V-type rail mobile platform is slidably connected with described V-type rail, described V-type rail
Described signal processing component is installed, described fluidic component, described power output component are installed in institute on mobile platform
On the bottom bracket stated, and keep at described signal processing component, described fluidic component and described power output component
In on same axis；
Described signal processing component includes torque signal coupler base, keyway plate, torque signal coupler and signal transacting
Device, described torque signal coupler base are arranged on described V-type rail mobile platform, described torque signal coupler
The described keyway plate of pedestal top installation, one end of described torque signal coupler is arranged on described keyway plate, another
End is connected by second shaft coupling with the clutch end of described output shaft；The signal output of described torque signal coupler
The signal processor signal with outside is held to be connected.
2. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described is close
Sealing drum, sealing drum left end cap and sealing drum right end cap of the sealed tube component including carrying blasthole, described sealing drum left end cap,
Sealing drum right end cap is sealingly mounted at the both ends of described sealing drum respectively；Described outer barrel component is arranged on described sealing drum
Inside, described outer barrel component includes tubular tests exemplar, outer barrel left end cap and outer barrel right end cap, described outer barrel left end cap
It is sealingly mounted at the both ends of described tests exemplar respectively with described outer barrel right end cap, and on the outside of described outer barrel right end cap
Equipped with magnet fluid sealing component, described outer barrel right end cap by corresponding magnet fluid sealing component realize outer barrel right end cap with it is close
Sealing between sealed tube right end cap round platform；Described interior cartridge module includes inner cylinder, inner cylinder left end cap and inner cylinder right end cap, wherein
Described inner cylinder left end cap and described inner cylinder right end cap are sealingly mounted at the both ends of described inner cylinder, described inner cylinder right end cap
It is spirally connected with the output end of described input shaft, keeps inner cylinder right end cap, described outer barrel right end cap and described sealing drum right
End cap is coaxial.
3. as claimed in claim 2 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described is close
Sealed tube upper wall is provided with the first screwed hole for being vented, and the lower wall of described sealing drum is provided with the second screwed hole for draining,
Described the first screwed hole and the second screwed hole is provided with corresponding sealing bolt；It is welded with above the blasthole of described sealing drum
To connect the screw boss of water-supply-pipe.
4. as claimed in claim 2 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described magnetic
Fluid seal assemblies include annular permanent magnet, two pieces of identical pole shoes being engaged with permanent magnet, every piece of pole shoe inwall
Or there is teeth groove on outer wall；Two pieces of pole shoes, formed relative motion revolving part and pole shoe and revolving part between gap form magnetic
Property loop, formed and be sealed in magnetic seal on revolving part.
5. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described is defeated
The outside of shaft is socketed left connecting cylinder, and one end of left connecting cylinder is affixed by bolt and described sealing drum left end cap, and protects
It is coaxial to hold left connecting cylinder and sealing drum left end cap；The other end of left connecting cylinder is equipped with left connecting cylinder end cap, described left connecting cylinder
Equipped with a set of described magnet fluid sealing component between described output shaft, wherein the endoporus and magnet fluid sealing of left connecting cylinder
Two pieces of pole shoe interference fits of component, the gap between two pieces of pole shoes, output shaft and pole shoe and output shaft form magnetic circuit,
Form the magnetic seal being sealed on output shaft.
6. as claimed in claim 5 based on bionical submerged jet surface drag reduction test device, it is characterised in that：A described left side
Adjust pad is accompanied between connecting cylinder and described sealing drum left end cap, and the mounting hole of described sealing drum left end cap embeds
There is water-sealed bearing, be furnished with deep groove ball bearing at described left connecting cylinder end cap, the both ends of described output shaft are mounted in corresponding deep
On ditch ball bearing and described water-sealed bearing.
7. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described is defeated
Enter the outside of axle and be socketed right connecting cylinder, wherein one end of right connecting cylinder and described sealing drum right end cap are affixed, the other end is equipped with
Corresponding bearing air cover；The felt collar end cap for sealing is accompanied between described right connecting cylinder and described sealing drum right end cap；
Water-sealed bearing is embedded with the mounting hole of described sealing drum right end cap, between described right connecting cylinder and described input shaft between
Gap is furnished with deep groove ball bearing, and the both ends of described input shaft are on corresponding water-sealed bearing and deep groove ball bearing；Described is defeated
The input for entering axle is furnished with the felt collar for being used for sealing, and felt collar is interference fit with input shaft.
8. as claimed in claim 7 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described is close
The inner surface of sealed tube right end cap is provided with axial round platform, between described outer barrel right end cap and the round platform of described sealing drum right end cap
Equipped with another set of magnet fluid sealing component, wherein two pieces of pole shoes of the endoporus of outer barrel right end cap and corresponding magnet fluid sealing component
Interference fits, the gap between two pieces of pole shoes, round platform and pole shoe and round platform form magnetic circuit, and formation is sealed on round platform
Magnetic seal.
9. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described
One shaft coupling nullifies shaft coupling for elasticity, and described second shaft coupling is blossom type shaft coupling.
10. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterised in that：Described V
It is furnished with positive stop in the end of type guide rail.
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| CN106092505B (en) * | 2016-07-01 | 2018-11-13 | 浙江工业大学 | A kind of test device of the drag reduction surface based on bionical jet stream |
| CN106525307B (en) * | 2016-08-04 | 2022-05-24 | 浙江工业大学 | Bionic non-smooth surface friction resistance testing device based on underwater |
| CN106017767B (en) * | 2016-08-04 | 2019-03-01 | 浙江工业大学 | A kind of adjustable fluctuation wall surface resistance test device |
| CN106482926B (en) * | 2016-09-29 | 2019-04-12 | 浙江工业大学 | Based on underwater multifunctional bionic drag reduction test device |
| CN106596049B (en) * | 2017-01-23 | 2023-03-31 | 浙江工业大学 | Testing device for testing drag reduction effect of non-smooth hydrofoil surface |
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| CN107907297A (en) * | 2017-11-06 | 2018-04-13 | 常州大学 | A kind of multi-functional composite anti-drag experiment test device |
| CN108194385B (en) * | 2017-12-28 | 2024-03-26 | 浙江工业大学 | Device and method for testing wear performance of two-phase flow fluid machinery flow-through part |
| CN108982060B (en) * | 2018-08-27 | 2023-11-17 | 浙江工业大学 | Hydrofoil surface fluid resistance testing device capable of realizing jet flow |
| CN109253856B (en) * | 2018-09-29 | 2024-05-24 | 浙江工业大学 | Wall drag reduction testing device with different structures based on different environments |
| CN109974971A (en) * | 2019-04-25 | 2019-07-05 | 扬州大学 | It is a kind of for pressure fluctuation measurement pulsed flood impact jet flow experimental provision and its measurement method |
| CN110579331B (en) * | 2019-08-05 | 2021-05-11 | 中国计量大学 | Bionic jet test device for cavitation resistance of surface of hydrofoil |
| CN112067250B (en) * | 2020-09-10 | 2022-10-18 | 中国计量大学 | Bionic jet flow resistance reduction surface testing device with variable jet flow direction and jet flow hole size |
| CN112067251B (en) * | 2020-09-10 | 2022-06-07 | 中国计量大学 | Bionic jet flow surface testing device capable of realizing variable jet flow hole shape and jet flow angle |
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| US5301541A (en) * | 1992-06-19 | 1994-04-12 | Joseph Daniel D | Drag determining apparatus |
| CN102226736B (en) * | 2011-04-11 | 2012-12-19 | 哈尔滨工程大学 | Testing apparatus for evaluating drag-reduction effects of bionic non-smooth surface and bionic jet surface |
| CN103063404B (en) * | 2013-01-10 | 2015-03-11 | 哈尔滨工程大学 | Testing device applied to drag reducing testing of jet flow surface and non-smooth surface |
| CN103630329A (en) * | 2013-12-18 | 2014-03-12 | 哈尔滨工程大学 | Testing device and method for evaluating drag-reduction effect of bionic jet surface |
| CN103776761B (en) * | 2014-01-13 | 2016-01-27 | 哈尔滨工程大学 | A kind of inward turning vertical bionic, drag-reducing test experiments platform |
| CN205317444U (en) * | 2015-12-29 | 2016-06-15 | 浙江工业大学 | Efflux surface drag reduction testing arrangement under water based on it is bionical |
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