CN103175671A - Simulation device and method for wind resistance of speed-regulating laminar wind flow flowing test model - Google Patents
Simulation device and method for wind resistance of speed-regulating laminar wind flow flowing test model Download PDFInfo
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- CN103175671A CN103175671A CN2013101001505A CN201310100150A CN103175671A CN 103175671 A CN103175671 A CN 103175671A CN 2013101001505 A CN2013101001505 A CN 2013101001505A CN 201310100150 A CN201310100150 A CN 201310100150A CN 103175671 A CN103175671 A CN 103175671A
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Abstract
The invention discloses a simulation device and a simulation method for the wind resistance of a speed-regulating laminar wind flow flowing test model. The device comprises a front cylinder, a middle cylinder, a rear cylinder and a wind speed regulating device which are sequentially connected, wherein a wind-inlet guide wind grid is arranged in the front cylinder, and a wind-outlet wind grid is arranged in the rear cylinder; and a dual guide rail for placement of the model is arranged in the middle cylinder, a dynamometer is arranged outside the axial end wall of the front cylinder, and the dynamometer passes through the front cylinder through a connecting shaft provided with a hook and then is arranged in the middle cylinder. External disordered wind after passing through the wind-inlet guide wind grid forms a stable laminar wind flow and reaches the middle cylinder, the wind flow in the middle cylinder after passing through the wind-outlet wind grid forms multiple strands of uniform-speed wind flows, and then the wind flow is sucked out by a wind-outlet fan; and the wind resistance of the wind facing end of the model moves toward the wind-outlet wind grid, the model draws the dynamometer through the connecting shaft, and the dynamometer shows readings, thereby obtaining the data of the wind resistance of the model. The device disclosed by the invention is simple in structure, and solves the problems that the wind tunnel test is high in cost and difficult to popularize.
Description
Technical field
The present invention relates to lamina air flow flow simulating measuring technique, relate in particular to a kind of analogue means and method of speed governing lamina air flow flowing test model windage.
Background technology
Laminar flow is a kind of flow state of fluid, and when fluid flowed in pipe, its particle was made level and smooth rectilinear motion along the direction parallel with tubular axis, and the flow velocity of fluid is maximum at the tube hub place, its nearly wall place minimum.In laminar flow, the track of fluid micellar does not have obvious irregular fluctuation, the momentum-exchange that the adjacent fluid interlayer only has molecular thermalmotion to cause.The laminar flow generally frictional resistance than turbulent flow is little, thereby in aircraft or Ship Design, should make boundary-layer flow retaining layer stream mode as far as possible.But laminar flow is a kind of perfect condition, and for how to produce this problem of laminar flow in special experimental enviroment, many scholars have proposed to produce separately the method for laminar flow to this.Main method for generation of laminar flow is wind-tunnel method at present.Flow tunnel testing device mainly is comprised of several parts such as stable section, contraction section, test section and diffusers.But it is very large to build wind tunnel test facility Expenses Cost, and need the testing tools such as three-dimensional hot-wire anemometer, aerodynamic balance, sensor and data acquisition system (DAS) in test process, the problems such as high and test period is long due to cost, wind-tunnel method is subject to very large restriction aspect the popularizing of generation laminar flow.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of analogue means and method of speed governing lamina air flow flowing test model windage is provided, overcome the wind tunnel test Expenses Cost high, and the problem that is difficult to popularize.
The present invention is achieved through the following technical solutions:
A kind of analogue means of speed governing lamina air flow flowing test model windage comprises the placket that connects successively, middle cylinder, rear cylinder and wind-speed adjusting device, is provided with air inlet water conservancy diversion air grid in described placket, is provided with air outlet water conservancy diversion air grid in rear cylinder; Offer the air inlet fan interface on the radial sidewalls of placket, be provided with the blowing machine interface at the axial end wall of rear; Be provided with two guide rails of placing model in middle cylinder, outside the placket axial end wall, dynamometer be installed, dynamometer passes placket by a coupling shaft with hook, and is placed in cylinder the axis of described coupling shaft and the dead in line of placket.
Be placed with wind gage between described middle cylinder and rear cylinder; Described wind-speed adjusting device connects respectively air inlet fan and blowing machine.
Described middle cylinder is a transparent glass tube, and dodge gate is installed on glass tube.
Described middle cylinder tin is connected with being connected by screw rod and nut and placket.
Described air inlet water conservancy diversion air grid and air outlet water conservancy diversion air grid are by the straight tube Shu Zucheng of a plurality of identical circles.
A kind of method of test model windage comprises the steps:
(1) open the dodge gate of middle cylinder, model is lain in a horizontal plane on two guide rails, the windward side of model is hung on the hook of coupling shaft;
(2) start speed governing lamina air flow simulated flowing apparatus, extraneous chaotic air, after passing through air inlet water conservancy diversion air grid by the air inlet fan interface, form stable laminar-flow air flow and arrive in the cylinder, air-flow in middle cylinder passes through to form multiply air stream at the uniform velocity after air outlet water conservancy diversion air grid, then by the sucking-off of blowing machine interface; Meanwhile, the windward side of model is subject to the resistance of wind and yearns for air outlet water conservancy diversion air grid direction along two lead rail axis and move, and model pulls dynamometer by coupling shaft, by the registration that dynamometer shows, obtains the data that model is subjected to windage;
(3) complete the test of model after, close the power supply of speed governing lamina air flow simulated flowing apparatus, open dodge gate, take out the model of having completed test.
In described step (2), place coloured smog at the air inlet fan interface, these smog are along with air is inhaled into air inlet water conservancy diversion air grid together, then enter in middle cylinder, discharge from the blowing machine interface at last, by the fluidised form of these smog of observation and analysis in middle cylinder, observe simulation laminar flow flow state.
The present invention has following advantage and effect with respect to prior art:
The present invention can directly substitute wind tunnel test in test process, on the one hand, avoided carrying out wind tunnel test and the spent great number cost of need construction wind-tunnel facility; On the other hand, avoided the testing apparatus of required complexity in test process.
The present invention is simple in structure, convenient test is quick, has adopted two guide rails and inlet and outlet water conservancy diversion air grid, and the method for testing error is less, and market potential is large, and its application will be conducive to popularizing of lamina air flow flow simulating technology.
Description of drawings
Fig. 1 is the structural representation of the analogue means of speed governing lamina air flow flowing test model windage of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is done further concrete detailed description the in detail.
Embodiment
As shown in Figure 1, the analogue means of speed governing lamina air flow flowing test model windage of the present invention, comprise the placket 1 that connects successively, middle cylinder, rear cylinder 6 and wind-speed adjusting device (not shown), be provided with air inlet water conservancy diversion air grid 2 in described placket 1, be provided with air outlet water conservancy diversion air grid 7 in rear cylinder 6; Offer air inlet fan interface 13 on the radial sidewalls of placket 1, be provided with blowing machine interface 15 at the axial end wall of rear 6; Be provided with two guide rails 9 of placing model in middle cylinder 4, outside placket 1 axial end wall, dynamometer 14 be installed, dynamometer 14 passes placket 1 by a coupling shaft 11 with hook, and is placed in cylinder 3 dead in line of the axis of described coupling shaft 11 and placket 1.
Be placed with wind gage 8 between described middle cylinder 4 and rear cylinder 6; Described wind-speed adjusting device connects respectively air inlet fan (not shown) and blowing machine (not shown).
Two guide rails 9 adopt two sections diameters the same, and the identical guide rod of length.In the stressed process of model, model moves axially along guide rail on two guide rails 9.
For the ease of cylinder 4 inner laminar flow flow states in observing, in this, cylinder 4 adopts transparent glass tube.Dodge gate 5 is installed on glass tube, and dodge gate 5 opens and closes, and is convenient to take out and place model.
Described middle cylinder 4 by screw rod 10 and nut and placket 1 be connected cylinder 6 and be connected, be convenient to dismantle.
Described air inlet water conservancy diversion air grid 2 and air outlet water conservancy diversion air grid 7 are by the straight tube Shu Zucheng of a plurality of identical circles.They play a part shunting and water conservancy diversion, have guaranteed the middle cylinder 4 continual and steady laminar flows of interior formation.Make the windage measurement of model more accurate.
A kind of method of test model windage comprises the steps:
(1) open the dodge gate 5 of middle cylinder 4, model is lain in a horizontal plane on two guide rails 9, the windward side of model is hung on the hook of coupling shaft 11;
(2) start speed governing lamina air flow simulated flowing apparatus, extraneous chaotic air, after passing through air inlet water conservancy diversion air grid 2 by air inlet fan interface 13, form stable laminar-flow air flow and arrive in the cylinder 4, air-flow in middle cylinder 4 passes through the rear formation multiply of air outlet water conservancy diversion air grid 7 air stream at the uniform velocity, then by 15 sucking-offs of blowing machine interface; Meanwhile, the windward side of model is subject to the resistance of wind and axially moves toward air outlet water conservancy diversion air grid 7 directions along two guide rails 9, and model pulls dynamometer 14 by coupling shaft 11, by the registration that dynamometer shows, obtains the data that model is subjected to windage;
(3) complete the test of model after, close the power supply of speed governing lamina air flow simulated flowing apparatus, open dodge gate 5, take out the model of having completed test.
In above-mentioned steps (2), coloured smog is placed at 13 places at the air inlet fan interface, these smog are along with air is inhaled into air inlet water conservancy diversion air grid 2 together, then enter in middle cylinder 4, discharge from blowing machine interface 15 at last, by the fluidised form of these smog of observation and analysis in middle cylinder 4, observe simulation laminar flow flow state.
In the reality test, in order to obtain the simulation laminar flow under different wind speed, the frequency of frequency converter that can be by regulating wind-speed adjusting device realizes speed governing, the size of wind speed (range is 0-45m/s) will be presented on the display screen of wind gage 8, thereby simulates the lamina air flow flowing environment under different wind speed.In order to reduce test error as far as possible, for the same model, but follow-on test average for 3 times, and it is subjected to the size of windage as this model.
As mentioned above, just can realize preferably the present invention.
Embodiments of the present invention are not restricted to the described embodiments; other are any does not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitute, combination, simplify; all should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (7)
1. the method for a test model windage, is characterized in that comprising the steps:
(1) open the dodge gate of middle cylinder, model is lain in a horizontal plane on two guide rails, the windward side of model is hung on the hook of coupling shaft;
(2) start speed governing lamina air flow simulated flowing apparatus, extraneous chaotic air, after passing through air inlet water conservancy diversion air grid by the air inlet fan interface, form stable laminar-flow air flow and arrive in the cylinder, air-flow in middle cylinder passes through to form multiply air stream at the uniform velocity after air outlet water conservancy diversion air grid, then by the sucking-off of air outlet blower fan; Meanwhile, the windward side of model is subject to the resistance of wind and yearns for air outlet water conservancy diversion air grid direction along two lead rail axis and move, and model pulls dynamometer by coupling shaft, by the registration that dynamometer shows, obtains the data that model is subjected to windage;
(3) complete the test of model after, close the power supply of speed governing lamina air flow simulated flowing apparatus, open dodge gate, take out the model of having completed test.
2. the method for test model windage according to claim 1, it is characterized in that, in described step (2), place coloured smog at the air inlet fan interface, then these smog enter in middle cylinder along with air is inhaled into air inlet water conservancy diversion air grid together, discharge from the air outlet blower fan at last, by the fluidised form of these smog of observation and analysis in middle cylinder, observe simulation laminar flow flow state.
3. the analogue means of a speed governing lamina air flow flowing test model windage, comprise the placket that connects successively, middle cylinder, rear cylinder and wind-speed adjusting device, it is characterized in that: be provided with air inlet water conservancy diversion air grid in described placket, be provided with air outlet water conservancy diversion air grid in rear cylinder; Offer the air inlet fan interface on the radial sidewalls of placket, be provided with the blowing machine interface at the axial end wall of rear; Be provided with two guide rails of placing model in middle cylinder, outside the placket axial end wall, dynamometer be installed, dynamometer passes placket by a coupling shaft with hook, and is placed in cylinder the axis of described coupling shaft and the dead in line of placket.
4. the analogue means of speed governing lamina air flow flowing test model windage according to claim 3, is characterized in that: be placed with wind gage between described middle cylinder and rear cylinder; Described wind-speed adjusting device connects respectively air inlet fan and blowing machine.
5. the analogue means of speed governing lamina air flow flowing test model windage according to claim 3 is characterized in that: described middle cylinder is a transparent glass tube, and dodge gate is installed on glass tube.
6. the analogue means of speed governing lamina air flow flowing test model windage according to claim 3 is characterized in that: described middle cylinder tin is connected with being connected by screw rod and nut and placket.
7. the analogue means of speed governing lamina air flow flowing test model windage according to claim 3, it is characterized in that: described air inlet water conservancy diversion air grid and air outlet water conservancy diversion air grid are by the straight tube Shu Zucheng of a plurality of identical circles.
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| CN201310100150.5A CN103175671B (en) | 2013-03-26 | 2013-03-26 | A kind of analogue means and method of speed governing lamina air flow flowing test model windage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
| CN104101476A (en) * | 2014-06-06 | 2014-10-15 | 华南理工大学 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
| CN107830986A (en) * | 2017-11-29 | 2018-03-23 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of air intake duct model flow control device |
| CN110033676A (en) * | 2019-03-12 | 2019-07-19 | 华南理工大学 | A kind of air layers reducing resistance physical analogy test device and its test method |
| CN117928880A (en) * | 2024-03-22 | 2024-04-26 | 南京沃姆传动技术有限公司 | Diversion equipment and diversion method for wind tunnel test |
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| CN1136664A (en) * | 1995-05-24 | 1996-11-27 | 普利司通运动株式会社 | Inspecting method and apparatus for badminton |
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| CN202119614U (en) * | 2010-12-20 | 2012-01-18 | 西安开容电子技术有限责任公司 | Air resistance characteristic testing device |
| CN102937509A (en) * | 2012-10-31 | 2013-02-20 | 中国航天空气动力技术研究院 | Comprehensive testing platform of propelling system |
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2013
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Patent Citations (7)
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| JPS5985960A (en) * | 1982-11-09 | 1984-05-18 | Kokuritsu Kogai Kenkyusho | Wind speed calibrating apparatus |
| CN1136664A (en) * | 1995-05-24 | 1996-11-27 | 普利司通运动株式会社 | Inspecting method and apparatus for badminton |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
| CN104101476A (en) * | 2014-06-06 | 2014-10-15 | 华南理工大学 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
| CN104101476B (en) * | 2014-06-06 | 2017-01-11 | 华南理工大学 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
| CN107830986A (en) * | 2017-11-29 | 2018-03-23 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of air intake duct model flow control device |
| CN107830986B (en) * | 2017-11-29 | 2024-05-07 | 中国航空工业集团公司沈阳空气动力研究所 | Air inlet channel model flow regulating mechanism |
| CN110033676A (en) * | 2019-03-12 | 2019-07-19 | 华南理工大学 | A kind of air layers reducing resistance physical analogy test device and its test method |
| CN110033676B (en) * | 2019-03-12 | 2021-08-10 | 华南理工大学 | Air film resistance reduction physical simulation testing device and testing method thereof |
| CN117928880A (en) * | 2024-03-22 | 2024-04-26 | 南京沃姆传动技术有限公司 | Diversion equipment and diversion method for wind tunnel test |
| CN117928880B (en) * | 2024-03-22 | 2024-05-28 | 南京沃姆传动技术有限公司 | Diversion equipment and diversion method for wind tunnel test |
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