CN103528789B - Jet flow drag reduction effect of two-dimensional plane proving installation - Google Patents
Jet flow drag reduction effect of two-dimensional plane proving installation Download PDFInfo
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- CN103528789B CN103528789B CN201310466845.5A CN201310466845A CN103528789B CN 103528789 B CN103528789 B CN 103528789B CN 201310466845 A CN201310466845 A CN 201310466845A CN 103528789 B CN103528789 B CN 103528789B
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Abstract
The object of the present invention is to provide jet flow drag reduction effect of two-dimensional plane proving installation, comprise water tank, water pump, test section, test section comprises two-dimensional channel, two-dimensional channel one end arranges two-dimensional channel entrance, the other end arranges two-dimensional channel outlet, two-dimensional channel entrance is tapered shape, two-dimensional channel outlet is diverging shape, grid type rectification section is installed between two-dimensional channel entrance and two-dimensional channel, water pump joining water box, water pump is communicated with two-dimensional channel entrance by inlet ductwork, two-dimensional channel outlet is by export pipeline joining water box, inlet ductwork is provided with flow speed control valve, electromagnetic flowmeter, tensimeter, inlet ductwork is also communicated with the return line that surplus valve is housed, return line joining water box.Cost of the present invention is low, compact conformation, volume are little, daily servicing is convenient, noise is low; The test to jet surface and non-smooth surface drag-reduction effect can be realized, also can carry out Common fluids mechanical test.
Description
Technical field
What the present invention relates to is a kind of proving installation, specifically drag-reduction effect proving installation.
Background technology
At present, both at home and abroad relevant motion drag reduction between scholar's convection cell and solid interface carries out theory study extensively and profoundly and applied research, and successfully to achieve in many-side and be in progress comparatively significantly.Because drag reduction directly can have influence on energy consumption and the mechanical property of equipment, so the research of this problem receives the concern of various countries experts and scholars always, its research method is mainly studied from aspects such as theoretical analysis, numerical simulation, model tests, finally by test sample in comparison test device resistance reducing performance and draw required conclusion, and then to put into again in practical implementation.No matter be theoretical analysis, or numerical evaluation, all the highest with the data precision that model test obtains, closer to reality, therefore theoretical analysis, digital simulation etc. finally also all need inspection and the checking of test.Test method, as the important means of Study of Fluid drag reduction, serves very important effect to the development of propulsive fluid drag reduction theory, the proposition of fluid mechanics new phenomenon and new theory, generally needs convection cell to carry out a large amount of testing experiment.Bionical jet surface can reduce the frictional resistance between fluid and solid, drag-reduction effect is obvious, it is a kind of brand-new drag reduction technology, the current research for technique mainly concentrates on theoretical analysis and numerical simulation stage, because of the jet surface tester for testing that it does not also have complete set, therefore model test also cannot complete.Traditional drag reduction experimental study is carried out mostly in the environment such as water hole, tank or pond towing, but, due to its involve great expense, costly, bulky, daily servicing is difficult, noise is large, test condition is wayward, test model is complicated, in the various aspects of test condition, all there is certain limitation, and the above device all cannot carry out the research of jet surface drag reduction test, therefore, research and design one is with low cost, structure simple, test jet flow drag reduction tester for testing easily seems particularly important.
At present, the drag reduction test device of non-smooth surface and jet surface focuses mostly in rotating jet method of testing, consumes more tubulence energy.As application number is: 201110089369.0, name is called " test unit of assessment bionic non-smooth surface and bionical jet surface drag-reduction effect " and application number is: 201120070969.8, the patent that name is called " a kind of test unit to frictional resistance test ".
Summary of the invention
The object of the present invention is to provide and a kind ofly can be used in the proving installation of test fluid flow to different structure surface friction drag, be particularly useful for the jet flow drag reduction effect of two-dimensional plane proving installation that the frictional resistance of jet surface area non-smooth surface is tested.
The object of the present invention is achieved like this:
Jet flow drag reduction effect of two-dimensional plane proving installation of the present invention, it is characterized in that: comprise water tank, water pump, test section, test section comprises two-dimensional channel, two-dimensional channel one end arranges two-dimensional channel entrance, the other end arranges two-dimensional channel outlet, two-dimensional channel entrance is tapered shape, two-dimensional channel outlet is diverging shape, grid type rectification section is installed between two-dimensional channel entrance and two-dimensional channel, water pump joining water box, water pump is communicated with two-dimensional channel entrance by inlet ductwork, two-dimensional channel outlet is by export pipeline joining water box, inlet ductwork is provided with flow speed control valve, electromagnetic flowmeter, tensimeter, inlet ductwork is also communicated with the return line that surplus valve is housed, return line joining water box.
The present invention can also comprise:
1, two-dimensional channel is provided with jet pipe entrance, water pump is communicated with jet tube inlet by fluid conduit, and fluid conduit is provided with fluid valve, jet pipe entrance each side have a pressure tap, two pressure taps all connect differential manometer.
2, two described pressure taps are opened on bottom center's line of two-dimensional channel, and the width of two-dimensional channel is not less than 10 times of its height.
3, the PIV system measuring turbulence characteristic is also comprised, described PIV system comprises double-pulse laser, CCD camera, pattern process computer, the upper surface of two-dimensional channel offers optical windshield, optical windshield is other arranges double-pulse laser, two-dimensional channel side arranges CCD camera, CCD camera is towards the below of optical windshield, and CCD camera connects pattern process computer.
4, when measuring the drag-reduction effect of non-smooth surface film, fluid valve is closed, the non-smooth surface film needing to measure is laid in the bottom of two dimension pipeline, is detected the drag-reduction effect of non-smooth surface film by the contrast pressure difference laid before and after non-smooth surface film.
Advantage of the present invention is: cost of the present invention is low, compact conformation, volume are little, daily servicing is convenient, noise is low; Test unit can realize the test to jet surface and non-smooth surface drag-reduction effect, also can carry out Common fluids mechanical test; Water supply part, can the effluxvelocity of Control experiment model and mainstream speed accurately by coordinating the components and parts such as centrifugal pump, valve, flowmeter, simulates multiple jet environment; PIV system can measure the turbulence characteristic of fully developed zone accurately; Two-dimensional channel material adopts transparent organic glass, is convenient to carry out visual inspection to flow condition; Recycling of water is achieved, environmental protection and energy saving in process of the test, pollution-free.
Accompanying drawing explanation
Fig. 1 a is structural representation of the present invention, and Fig. 1 b is the front view of two-dimensional channel;
Fig. 2 is the optical arrangement figure that PIV of the present invention measures.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 2, the present invention includes main flow circulation line, jet-loop pipeline and PIV system three part composition.Main flow circulation line comprises water tank 1, centrifugal pump 2, surplus valve 3, flow speed control valve 4, electromagnetic flowmeter 5, tensimeter 6, filter screen 7, grid type rectification section 8, the entrance 9 of two-dimensional channel, two-dimensional channel 10, the outlet 13 of two-dimensional channel and the loop web member of necessity.Wherein the width of two-dimensional channel is more than 10 times of height, ensure that in the flowing across widthwise central face place be two-dimensional flow.The material of passage adopts the transparent organic glass that 20mm is thick, so that carry out visual inspection to mobility status.
Fluid conduit comprises the loop web member of water tank 1, centrifugal pump 2, surplus valve 3, flow speed control valve 4, tensimeter 6, jet pipe entrance 11 and necessity.Jet pipe entrance is arranged on the lower surface of two-dimensional channel, two pressure taps have been opened in the left and right of jet orifice entrance 11, this pressure of 2 is introduced high precision differential pressure gauge, to record the differential pressure of this point-to-point transmission, by with during non-jet measured by pressure difference carry out contrasting the drag-reduction effect detecting jet surface.
As shown in Figure 2, PIV system comprises double-pulse laser 15, laser optics eyeglass, CCD camera 17, time control loop, pattern process computer, image processing software.Coordinate x, y, z represents flow direction, the direction vertical with wall and across Width respectively.Laser beam irradiation at two-dimensional channel across on widthwise central face, to carry out the flow field survey in x-y face.PIV image covers the height of whole passage, and acquisition rate is 8Hz, gets 500 pairs of PIV images in whole measurement.The query window area of velocity analysis is 32 × 16 pixels, trace particle is the acrylic particles of diameter 1 ~ 4 μm, its concentration can be adjusted to that average numbers of particles in each query window is minimum reaches 10, when by after obtaining velocity field to a pair image procossing, correct away to it incorrect velocity field that noise effect of correlation function middle pitch causes with TSIInsight software, the self-editing FORTRAN routine in cavity produced after removing error rate is by filling the interpolation of adjacent velocity field.
Principle of work of the present invention is:
The present invention supplies water to main flow circulation line and jet-loop pipeline by driving centrifugal pump 2, is regulated the top hole pressure of centrifugal pump 2 by surplus valve 3.The entrance 9 of two-dimensional channel and the speed of jet pipe entrance 11 is regulated by regulating flow speed control valve 4.Respectively open a pressure tap at two ends, jet pipe entrance left and right, the force value recorded is introduced high precision differential pressure gauge, by comparing to the pressure difference recorded when not adding jet and add jet the drag-reduction effect detecting jet surface.When needing the drag-reduction effect measuring the non-smooth surfaces such as pit, convex closure, groove, do not need to add jet pipe, only need paste non-smooth surface film at the lower surface of two-dimensional channel, and the pressure difference measured before and after pad pasting is to detect the drag-reduction effect of above-mentioned non-smooth surface.Measured accurately by the velocity field of PIV system to two-dimensional channel.
The present invention includes water tank 1, centrifugal pump 2, surplus valve 3, flow speed control valve 4, electromagnetic flowmeter 5, tensimeter 6, filter screen 7, form as the two-dimensional channel 10 of test section and the loop connecting piece of necessity.Entrance 9 in two-dimensional channel adopts tapered shape, and be provided with grid type rectification section 8, adopt gradually expanded form to reduce the pressure surge of system two-dimensional channel export department 13, optical windshield 12 has been offered in two-dimensional channel downstream, measure with the PIV carrying out fully developed zone turbulence characteristic, on two-dimensional channel, streamwise offers two pressure taps, and this pressure of 2 is introduced high precision differential pressure gauge, to measure the pressure reduction of this point-to-point transmission.
In the exit of centrifugal pump 2, surplus valve 3 is installed, delivery side of pump pressure can have been regulated.
Main flow line and jet branch road all install flow speed control valve 4, the speed of two-dimentional pipeline and jet pipe entrance can have been regulated.
Main flow line and jet branch road all install tensimeter 6, can speed governing have been facilitated.
The turbulence characteristic of PIV system to fully developed zone is used to measure.
PIV system comprises double-pulse laser 15, laser optics eyeglass, CCD camera 17, time control loop, pattern process computer and image processing software.PIV image covers the height of whole passage, acquisition rate is 8Hz, 500 pairs of PIV images are got in whole measurement, the query window area of velocity analysis is 32 × 16 pixels, trace particle is the acrylic particles of diameter 1 ~ 4 μm, its concentration can be adjusted to that average numbers of particles in each query window is minimum reaches 10, when by after obtaining velocity field to a pair image procossing, with TSIInsight software, the incorrect velocity field that the noise effect of correlation function middle pitch causes is corrected away to it, the self-editing FORTRAN routine in cavity produced after removing error rate is by filling the interpolation of adjacent velocity field.
The material of two-dimensional channel adopts transparent organic glass, so that carry out visual inspection to flow condition.
Two pressure taps are opened in the bottom surface of two-dimensional channel across on width centreline, and first pressure tap opens the left end at jet pipe entrance, and another pressure tap opens the right-hand member at jet pipe entrance.Measure the pressure reduction of 2, calculated the drag-reduction effect of jet surface by the magnitude of pressure differential before and after contrast jet.
When needing the drag-reduction effect measuring non-smooth surface, do not need to add jet pipe, or the speed of jet pipe entrance is adjusted to 0, and the non-smooth surface film needing to measure is laid in the bottom of two-dimentional pipeline, the invariant position of pressure tap, measure the pressure reduction of 2, detected the drag-reduction effect of non-smooth surface by the contrast pressure difference laid before and after non-smooth surface film.
Claims (5)
1. jet flow drag reduction effect of two-dimensional plane proving installation, it is characterized in that: comprise water tank, water pump, test section, test section comprises two-dimensional channel, two-dimensional channel one end arranges two-dimensional channel entrance, the other end arranges two-dimensional channel outlet, two-dimensional channel entrance is tapered shape, two-dimensional channel outlet is diverging shape, grid type rectification section is installed between two-dimensional channel entrance and two-dimensional channel, water pump joining water box, water pump is communicated with two-dimensional channel entrance by inlet ductwork, two-dimensional channel outlet is by export pipeline joining water box, inlet ductwork is provided with flow speed control valve, electromagnetic flowmeter and tensimeter, inlet ductwork is also communicated with the return line that surplus valve is housed, return line joining water box,
Two-dimensional channel is provided with jet pipe entrance, water pump is communicated with jet tube inlet by fluid conduit, and fluid conduit is provided with fluid valve, jet pipe entrance each side have a pressure tap, two pressure taps all connect differential manometer.
2. jet flow drag reduction effect of two-dimensional plane proving installation according to claim 1, is characterized in that: two described pressure taps are opened on bottom center's line of two-dimensional channel, and the width of two-dimensional channel is not less than 10 times of its height.
3. jet flow drag reduction effect of two-dimensional plane proving installation according to claim 1 and 2, it is characterized in that: also comprise the PIV system measuring turbulence characteristic, described PIV system comprises double-pulse laser, CCD camera and pattern process computer, the upper surface of two-dimensional channel offers optical windshield, optical windshield is other arranges double-pulse laser, two-dimensional channel side arranges CCD camera, and CCD camera is towards the below of optical windshield, and CCD camera connects pattern process computer.
4. jet flow drag reduction effect of two-dimensional plane proving installation according to claim 1 and 2, it is characterized in that: when measuring the drag-reduction effect of non-smooth surface film, fluid valve is closed, the non-smooth surface film needing to measure is laid in the bottom of two dimension pipeline, is detected the drag-reduction effect of non-smooth surface film by the contrast pressure difference laid before and after non-smooth surface film.
5. jet flow drag reduction effect of two-dimensional plane proving installation according to claim 3, it is characterized in that: when measuring the drag-reduction effect of non-smooth surface film, fluid valve is closed, the non-smooth surface film needing to measure is laid in the bottom of two dimension pipeline, is detected the drag-reduction effect of non-smooth surface film by the contrast pressure difference laid before and after non-smooth surface film.
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| CN201310466845.5A CN103528789B (en) | 2013-10-09 | 2013-10-09 | Jet flow drag reduction effect of two-dimensional plane proving installation |
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| CN201310466845.5A CN103528789B (en) | 2013-10-09 | 2013-10-09 | Jet flow drag reduction effect of two-dimensional plane proving installation |
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| CN108760232B (en) * | 2018-05-30 | 2024-03-19 | 华中科技大学 | Test device and test method for exploring surface drag reduction mechanism |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3328622B2 (en) * | 1999-12-21 | 2002-09-30 | 住友重機械工業株式会社 | Free-running model test method and apparatus for ships |
| CN102183356A (en) * | 2011-03-17 | 2011-09-14 | 哈尔滨工程大学 | Device for testing fluid friction resistance |
| CN202041366U (en) * | 2011-05-06 | 2011-11-16 | 哈尔滨工程大学 | Pull-type test device for hydraulic resistance |
| US8152440B2 (en) * | 2008-08-26 | 2012-04-10 | General Electric Company | Resistive contact sensors for large blade and airfoil pressure and flow separation measurements |
| CN102998087A (en) * | 2012-11-27 | 2013-03-27 | 哈尔滨工程大学 | Resistance testing device suitable for jet flow surface and non-smooth surface |
-
2013
- 2013-10-09 CN CN201310466845.5A patent/CN103528789B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3328622B2 (en) * | 1999-12-21 | 2002-09-30 | 住友重機械工業株式会社 | Free-running model test method and apparatus for ships |
| US8152440B2 (en) * | 2008-08-26 | 2012-04-10 | General Electric Company | Resistive contact sensors for large blade and airfoil pressure and flow separation measurements |
| CN102183356A (en) * | 2011-03-17 | 2011-09-14 | 哈尔滨工程大学 | Device for testing fluid friction resistance |
| CN202041366U (en) * | 2011-05-06 | 2011-11-16 | 哈尔滨工程大学 | Pull-type test device for hydraulic resistance |
| CN102998087A (en) * | 2012-11-27 | 2013-03-27 | 哈尔滨工程大学 | Resistance testing device suitable for jet flow surface and non-smooth surface |
Non-Patent Citations (1)
| Title |
|---|
| 仿生射流表面减阻特性实验研究;赵刚等;《中南大学学报（自然科学版）》;20120831;第43卷(第8期);第3007-3012页 * |
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