CN103680266A - Small-size hydromechanics experimental apparatus - Google Patents
Small-size hydromechanics experimental apparatus Download PDFInfo
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- CN103680266A CN103680266A CN201310611674.0A CN201310611674A CN103680266A CN 103680266 A CN103680266 A CN 103680266A CN 201310611674 A CN201310611674 A CN 201310611674A CN 103680266 A CN103680266 A CN 103680266A
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Abstract
The invention discloses a small-size hydromechanics experimental apparatus. The apparatus is simple in structure, capable of providing a stable flow field, reusable and accurate in experimental test result. The apparatus comprises a ball valve, a water tank, a water outlet pipe, a water inlet pipe, a water storage tank and an electric water pump. The water tank is an important component of the experimental apparatus and comprises a water tank inlet section, a water tank experiment section and a water tank outlet section. The water tank made of organic glass is transparent and can display flowing states of water flow therein visually, thereby facilitating observing and shooting of the whole flow field.
Description
Technical field
The present invention relates to a kind of experimental provision, be specifically related to a kind of miniature fluid dynamics experimental device, belong to fluid mechanics experimental technique field.
Background technology
Experimental fluid mechanics is the important branch of fluid mechanics subject, and the effect of playing in fluid mechanics research and theoretical fluid mechanics and Fluid Mechanics Computation have same importance.Experimental fluid mechanics not only requires to have deep mathematics, physical basis and Hydrodynamics Theory knowledge, also requires to have stronger the scope of one's knowledge, Machine Design and manipulative ability.Along with scientific and technical development, a lot of fields such as ocean, the hydrology, fluid machinery have a lot of fluid mechanics problems to await research and analysis, so experimental fluid mechanics is being brought into play irreplaceable effect in these problems of research.Meanwhile, experimental fluid mechanics has good demonstration illustration to students ' understanding and understanding fluid phenomenon and essence thereof in teaching.
At present, when research associated fluid mechanics problem, generally all adopt similarity theory to carry out the simulation in flow field, by setting up wind-tunnel, pond and circulating water chennel, test.Hydrostatic vater tand in the past or dynamic water tank are all open type tanks, and the flow field of complex structure and formation is stable not, and it is unreliable to repeat to test, and can not obtain by experiment comparatively accurate data.And annular water tank in the past can not be eliminated cross current impact, also experimental results is produced to certain impact.
Summary of the invention
In view of this, the invention provides a kind of miniature fluid dynamics experimental device, this apparatus structure is simple, and stable flow field can be provided, can reuse and experimental results accurate.
This experimental provision comprises tank main body, reserve tank and water pump; The water inlet of described water pump is by pipeline and reserve tank, and water delivering orifice is connected with one end of tank main body, and the other end of tank main body is connected with reserve tank.Described tank main body comprises tank entrance, flume experiment section and tank outlet section; That above-mentioned each section is is that poly (methyl methacrylate) plate is made, hollow, the equal opening in two ends and xsect are foursquare structure; Described tank entrance, flume experiment section and tank outlet section are connected successively by flange.
Described tank entrance comprises trapezoidal sections and flat segments, the small end of its trapezoidal sections with by pipeline, be connected with water pump, large end is connected with flat segments, flat segments is connected with flume experiment section by flange; At the affixed screens in the junction of described tank entrance and flume experiment section, described screens is stainless steel woven wire.
The xsect of described flume experiment section is identical with the xsect size of flat segments in tank entrance; Upper surface in flume experiment section is processed with rectangular window, and this rectangular window seals by mounting cover; At the inside surface of flume experiment section, the vertical correspondence position of this rectangular window is processed with mounting groove; On described mounting cover surface, be provided with angle dial.
Described tank outlet section is connected with reserve tank by pipeline.
The vertical affixed honeycomb screen between inside surface up and down of flat segments in described tank entrance, described honeycomb screen is comprised of the above equally spaced organic glass sheet of a slice.
The length ratio of described tank entrance and flume experiment section 7 is 1:1.5～1:2; In described tank entrance, the length ratio of trapezoidal sections and flat segments is 1:1～1.5:1, and the side ratio of trapezoidal sections both ends of the surface is 1:2; Making the center of described rectangular window and the distance between flume experiment section and tank entrance link end face is L1, and the distance between flume experiment section and tank outlet section link end face is L2, and the Length Ratio of L1 and L2 is 2:1～3:1.
The order number of described screens is 30～50 orders.
On the connecting line of described water pump and tank main body, water adjusting valve is installed.
In the affixed silicagel pad of described flange connections.
Described tank outlet section is identical with the structure of tank entrance, trapezoidal sections and flat segments, consists of; One end of its horizontal segment is connected with flume experiment section by flange, and the other end is connected with the large end of described trapezoidal sections, and the small end of trapezoidal sections is connected with reserve tank by pipeline.
Beneficial effect:
(1) this device have simple in structure, cost is low, can utilize laser velocimeter and be convenient to advantage such as repacking replacing etc., and by each section of tank theme carried out to proportional control, guarantee that flume experiment section flow field is stable, can realize circulating of current, thereby obtain comparatively accurate experimental data.
(2) tank main body adopts organic glass to make, and transparent visual can show the flow state of tank water flow inside intuitively, convenient whole flow field is observed and photographed.Moreover, along with development and the application of modern flow field measurement technique, this experimental provision can make full use of the measurement that laser Dppler veloicty measurement technology (LDV) and Particle Image Velocimetry (PIV) carry out flow field velocity distribution.The characteristic of LDV and its non-cpntact measurement of PIV, interference flowing field, can not carry out deep cognition to the flow field in water tank device, for further theoretical research and applied research lay the first stone.
(3) owing to being provided with angle dial on flume experiment section mounting cover, can accurately set the setting angle of empirical model, to guarantee the accuracy of test result.
(4) xsect of tank main body is rectangle, and the inspection surface while making to adopt laser measurement is plane, can not produce light curved surface refraction effect, accurate to guarantee test result.
(5) between each section of tank main body, by flange, connect, be convenient to assembling, dismounting, cleaning and the maintenance of tank.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of circulation experiment device;
Fig. 2 is the front view of tank main part;
Fig. 3 is the vertical view of tank main part;
Fig. 4 is the schematic diagram of screens.
Wherein: 1-ball valve, 2-tank main body, 3-water outlet water pipe, 4-reserve tank, 5-electric water pump, 6-tank entrance, 7-flume experiment section, the tested object of 8-, 9-tank outlet section, 10-honeycomb screen, 11-screens, 12-mounting cover, the 13-water pipe of intaking
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
The present embodiment provides a kind of miniature fluid dynamics experimental device, this device not only has that simple structure, cost are low, the space that saves space, can reuse, can laser velocimeter and be convenient to the multiple advantages such as repacking replacing, the more important thing is and can realize circulating of current, flume experiment section flow field is reliable and stable; Can study the common fluid mechanics problems such as aerofoil profile, machinery impeller vane, cylinder flow-disturbing.
The concrete structure of this device as shown in Figure 1, comprises ball valve 1, tank main body 2, water outlet water pipe 3, water inlet water pipe 13, reserve tank 4 and electric water pump 5.This device utilizes electric water pump 5 as the power source circulating, and electric water pump 5 is extracted the water in reserve tank 4 out, and is delivered in tank main body 2 by water inlet water pipe 13; The output terminal of tank main body 2 is connected with reserve tank 4 by water outlet water pipe 3.On described water inlet water pipe 13, ball valve 1 is installed.
The important component part that tank main body 2 is this experimental provision, comprises tank entrance 6, flume experiment section 7 and tank outlet section 9, as shown in Figures 2 and 3.Its each Duan Jun for that be put together by poly (methyl methacrylate) plate, hollow, the equal opening in two ends and xsect be foursquare structure.Because tank main body 2 adopts poly (methyl methacrylate) plate, make, transparent visual, can realize mobile Presentation Function, conveniently whole flow field is observed and is photographed.Tank entrance 6, flume experiment section 7 and tank outlet section 9 are connected successively by flange, for guaranteeing the sealing of flange connections, increase silicagel pad, and pass through bolt tightening in each junction.For making the even flow field of flume experiment section 7 stable, described tank entrance 6 is 1:1.5 with the length ratio of flume experiment section 7.
The rectification that tank entrance 6 is realized current, guarantees that the current of inflow flume experiment section 7 are uniform and stable.For making rectification effect good, described tank entrance 6 is by trapezoidal sections and flat segments is bonding forms (with respect to water (flow) direction, this trapezoidal sections is expansion segment), one end that in its trapezoidal sections, xsect is less is connected with water inlet water pipe 13 by transition section, one end that xsect is larger is bonding in flat segments, and flat segments is connected with flume experiment section 7 by flange.In tank entrance 6, the length ratio of trapezoidal sections and flat segments is 1:1, and the side ratio of trapezoidal sections both ends of the surface is 1:2; Tank entrance 6 flat segments between inside surface, be connected with up and down honeycomb screen 4, described honeycomb screen 4 by multi-disc equidistantly and the organic glass sheet that is parallel to this flat segments left and right wall form.In tank entrance 6 and the junction of flume experiment section 7, be provided with screens 5, screens 5 is 50 object stainless steel woven wires simultaneously, and screens 5 is fixed on the flange of this junction by screw.
Flume experiment section 7 is one section of straight tank, and its xsect is identical with the xsect size of flat segments in tank entrance 6.Upper surface in flume experiment section 7 is processed with rectangular window, and this rectangular window seals by mounting cover 12, and therefore whole tank seals, and can all be full of current.At the inside surface of flume experiment section 7, the correspondence position of this rectangular window is processed with mounting groove; During test, tested object 8 is put into flume experiment section 7 inside from this rectangular window, the projection of tested object 8 bottoms is inserted in corresponding mounting groove, and the projection on top is stretched out the center pit of installing on flume experiment section 7 lids 12, forms knob.Mounting cover 12 is affixed.By mounting cover, by the uniform screw in its outer, be fixed in flume experiment section 7.There is angle dial on mounting cover 12 surfaces, by rotation knob, can accurately set tested object 8 with respect to the setting angle of water (flow) direction.
Making the center of described rectangular window and the distance between flume experiment section 7 and tank entrance 6 link end faces is L1, and the distance between flume experiment section 7 and tank outlet section 9 link end faces is L2, the current that flow through tested object for assurance are uniform and stable, and the Length Ratio of L1 and L2 is 2:1.
For easy to process, in the present embodiment, tank outlet section 9 is identical with the structure of tank entrance 6, by trapezoidal sections and flat segments, forms (with respect to water (flow) direction, this trapezoidal sections is contraction section).In tank outlet section 9, one end of horizontal segment is connected with flume experiment section 7 by flange, and one end that the other end and described trapezoidal sections xsect are larger is bonding, and one end that trapezoidal sections xsect is less is connected with water outlet water pipe 3 by transition section.
The principle of work of this experimental provision is: first tested object 8 is arranged in flume experiment section 7, and adjusts it with respect to the angle of water (flow) direction by knob and angle dial.Then start electric water pump, by electric water pump, the water in reserve tank is extracted out, by water inlet water pipe, be delivered in tank main body, by the ball valve before tank main body, control the size of water inlet current.After the rectification of current through honeycomb screen and screens in tank input section, enter flume experiment section, now current are uniform and stable gradually, while arriving the tested object 8 in flume experiment section, formed stable flow field.Thereby the Mechanics Phenomenons such as the whirlpool producing during the tested object 8 of observed temperature flow field process, flow-disturbing.Current flow through after tested object 8, and process tank deferent segment also turns back in reserve tank by water outlet water pipe, thereby realizes the circulation in whole flow field.
Utilize this device can study the common fluid mechanics problems such as aerofoil profile, machinery impeller vane, cylinder flow-disturbing, be a kind of can be significant and the experimental trough device of practical value at fundamental research and real application research.The experimental facilities that can be used as institution of higher learning's teaching, scientific research institutions' Study of Fluid mechanics, has very high reference and using value.This device not only can carry out hydromechanical fundamental test simultaneously, also can carry out the exploratory scientific experiments such as flow field demonstration and laser flow-field test.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a miniature fluid dynamics experimental device, is characterized in that: comprise tank main body (2), reserve tank (4) and water pump; The water inlet of described water pump is by pipeline and reserve tank (4), and water delivering orifice is connected with the one end of tank main body (2), and the other end of tank main body (2) is connected with reserve tank (4);
Described tank main body (2) comprises tank entrance (6), flume experiment section (7) and tank outlet section (9); That above-mentioned each section is is that poly (methyl methacrylate) plate is made, hollow, the equal opening in two ends and xsect are foursquare structure; Described tank entrance (6), flume experiment section (7) and tank outlet section (9) are connected successively by flange;
Described tank entrance (6) comprises trapezoidal sections and flat segments, the small end of its trapezoidal sections with by pipeline, be connected with water pump, large end is connected with flat segments, flat segments is connected with flume experiment section (7) by flange; The affixed screens in junction (11) at described tank entrance (6) with flume experiment section (7), described screens (11) is stainless steel woven wire;
The xsect of described flume experiment section (7) is identical with the xsect size of flat segments in tank entrance (6); Upper surface in flume experiment section (7) is processed with rectangular window, and this rectangular window seals by mounting cover; Inside surface in flume experiment section (7), the vertical correspondence position of this rectangular window is processed with mounting groove; On described mounting cover surface, be provided with angle dial;
Described tank outlet section (9) is connected with reserve tank (4) by pipeline.
2. a kind of miniature fluid dynamics experimental device as claimed in claim 1, it is characterized in that: the vertical affixed honeycomb screen (10) between inside surface up and down of flat segments in described tank entrance (6), described honeycomb screen (10) is comprised of the above equally spaced organic glass sheet of a slice.
3. a kind of miniature fluid dynamics experimental device as claimed in claim 1 or 2, is characterized in that: described tank entrance (6) is 1:1.5～1:2 with the length ratio of flume experiment section (7); In described tank entrance (6), the length ratio of trapezoidal sections and flat segments is 1:1～1.5:1, and the side ratio of trapezoidal sections both ends of the surface is 1:2; Making the center of described rectangular window and the distance between flume experiment section (7) and tank entrance (6) link end face is L1, with the distance between flume experiment section (7) and tank outlet section (9) link end face is L2, the Length Ratio of L1 and L2 is 2:1～3:1.
4. a kind of miniature fluid dynamics experimental device as claimed in claim 1 or 2, is characterized in that: the order number of described screens (11) is 30～50 orders.
5. a kind of miniature fluid dynamics experimental device as claimed in claim 1 or 2, is characterized in that: on the connecting line of described water pump and tank main body (2), water adjusting valve is installed.
6. a kind of miniature fluid dynamics experimental device as claimed in claim 1 or 2, is characterized in that: in the affixed silicagel pad of described flange connections.
7. a kind of miniature fluid dynamics experimental device as claimed in claim 1 or 2, is characterized in that: described tank outlet section (9) is identical with the structure of tank entrance (6), trapezoidal sections and flat segments, consists of; One end of its horizontal segment is connected with flume experiment section (7) by flange, and the other end is connected with the large end of described trapezoidal sections, and the small end of trapezoidal sections is connected with reserve tank (4) by pipeline.
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| CN201310611674.0A CN103680266A (en) | 2013-11-26 | 2013-11-26 | Small-size hydromechanics experimental apparatus |
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Cited By (8)
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| CN104132796A (en) * | 2014-07-22 | 2014-11-05 | 吉林大学 | Velocity measurement testing device for particle image of internal flow field of stator impeller |
| CN104599574A (en) * | 2014-12-29 | 2015-05-06 | 河海大学 | Physical model water tank with internal circulation flow generating device |
| CN107907304A (en) * | 2018-01-03 | 2018-04-13 | 燕山大学 | Karman vortex street visualized experiment platform |
| CN108597316A (en) * | 2018-03-14 | 2018-09-28 | 李�杰 | Hydrological experiment device |
| CN109243264A (en) * | 2018-11-09 | 2019-01-18 | 贵州民族大学 | A kind of physics teaching hydrodynamics apparatus for demonstrating |
| CN109342278A (en) * | 2018-11-28 | 2019-02-15 | 北京航空航天大学 | A kind of particle image velocimetry device with adjustable fixed structure |
| CN110686860A (en) * | 2019-09-20 | 2020-01-14 | 天津大学 | Experimental device capable of simulating constant-amplitude variable-frequency oscillation pipe flow |
| CN117168763A (en) * | 2023-11-03 | 2023-12-05 | 上海交通大学三亚崖州湾深海科技研究院 | Model test device of deep sea mining fluid mechanics |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104132796A (en) * | 2014-07-22 | 2014-11-05 | 吉林大学 | Velocity measurement testing device for particle image of internal flow field of stator impeller |
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| CN107907304A (en) * | 2018-01-03 | 2018-04-13 | 燕山大学 | Karman vortex street visualized experiment platform |
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| CN109243264A (en) * | 2018-11-09 | 2019-01-18 | 贵州民族大学 | A kind of physics teaching hydrodynamics apparatus for demonstrating |
| CN109342278A (en) * | 2018-11-28 | 2019-02-15 | 北京航空航天大学 | A kind of particle image velocimetry device with adjustable fixed structure |
| CN110686860A (en) * | 2019-09-20 | 2020-01-14 | 天津大学 | Experimental device capable of simulating constant-amplitude variable-frequency oscillation pipe flow |
| CN117168763A (en) * | 2023-11-03 | 2023-12-05 | 上海交通大学三亚崖州湾深海科技研究院 | Model test device of deep sea mining fluid mechanics |
| CN117168763B (en) * | 2023-11-03 | 2024-02-13 | 上海交通大学三亚崖州湾深海科技研究院 | Model test device of deep sea mining fluid mechanics |
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Application publication date: 20140326 |