CN201382848Y - High wind speed smoke display device - Google Patents
High wind speed smoke display device Download PDFInfo
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- CN201382848Y CN201382848Y CN200820123718U CN200820123718U CN201382848Y CN 201382848 Y CN201382848 Y CN 201382848Y CN 200820123718 U CN200820123718 U CN 200820123718U CN 200820123718 U CN200820123718 U CN 200820123718U CN 201382848 Y CN201382848 Y CN 201382848Y
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Abstract
A high wind speed smoke display device comprises a smoke injection device A and a flow field recording device B, wherein, the smoke injection device A comprises an air compressor, a smoke generator, a smoke incoming pipeline, a model, a smoke diverter hole, a laser and a picture recorder; and inthe flow field recording device B, an argon-ion continuous laser emits lasers at first, the beam diameter of the lasers is less than 5 mm, the lasers are converted into sheet laser beams through a cylindrical mirror, a display flow field is irradiated in a high-intensity manner, and then the picture recorder controlled by a computer shoots automatically and records the structural picture of the flow field. The high wind speed smoke display device adopts advanced technologies of smoke injection, display, record and quantification at a high wind speed, leads the wind speed to be 60 m/s or even higher in a smoke display experiment, can display continuously, and supplies necessary technical means for complicated circumferential motions of a slender revolution body and an aircraft at high angle of attack and the Reynolds number effect research thereof.
Description
(1) technical field:
The utility model is a kind of high wind speed smoke display device, belongs to the Aero-Space experimental technique.
(2) background technology:
Modern advanced Aeronautics and Astronautics weaponry all requires to have high motor-driven and high quick ability usually, so on topological design, all made full use of controlled separated flow and favourable stable vortex motion and the corresponding favourable interference thereof of the big angle of attack in streaming, improved their flying quality with this.So, in aerodynamic arrangement's research and design process of contemporary aircraft, the FLOW VISUALIZATION technology that makes full use of in the experiment of wind-tunnel and water hole shows that its complicated fluidal texture and further its complicated Interference Flow mechanism of announcement and corresponding main contral parameter have become one of important research means.
Active service at present and the advanced fighter plane that is developing adopt the fuselage and the head of similar body of revolution invariably, result of study shows: the side force characteristic of the advanced fighter plane of this class under zero sideslip, the big angle of attack is by head and the decision of forebody shape, and moving and side force property class seemingly with the asymmetric eddy current of elongated body of revolution, the side force that promptly under the big angle of attack, not only has bigger asymmetric whirlpool generation, and structure is streamed in space, asymmetric whirlpool and the side force characteristic also can significant change take place along with the variation of Reynolds number (being Red).Be illustrated in figure 1 as α=50 °, different Red (Red=1 * 10
5～8 * 10
5) following elongated body of revolution 3.35 section surface pressure distribution curves, therefrom different as can be seen Red numbers down, there is evident difference in the boundary-layer separation characteristic of both sides, body of revolution cross section, promptly along with the increase of Reynolds number (being Red), body of revolution both sides boundary-layer separation has successively experienced subcritical/subcritical (Red=1.33 * 10
5, corresponding experiment incoming flow wind speed V=10m/s, the body of revolution both sides all are subcritical separation), subcritical/critical (Red=4 * 10
5, corresponding experiment incoming flow wind speed V=30m/s, body of revolution one side is subcritical separation, opposite side is critical separation), critical/critical (Red=8 * 10
5, corresponding experiment incoming flow wind speed V=60m/s, the body of revolution both sides all are critical separation) three kinds separate flow pattern, corresponding space is streamed flow pattern remarkable change has also been taken place, by less Red number (Red=1.33 * 10
5, corresponding experiment incoming flow wind speed V=10m/s) time asymmetric two vortex structures develop into higher Red number (Red=4 * 10 gradually
5, corresponding experiment incoming flow wind speed V=30m/s) time asymmetric three vortex structures, not only bigger change has taken place in the vortex system structure, and big variation has also taken place in the locus.
From existing result of study as can be seen, the Red number has bigger influence to the moving structure of the asymmetric eddy current of pressure distribution and corresponding space thereof and the form on body of revolution surface.This just needs development be applicable to that broad Red counts the Spatial Flow Visualization technology of variation range, streams flow field structure to disclose its big angle of attack, and then comes the aerodynamic characteristic and the flow mechanism of exploratory flight device with dynamometry and pressure measurement comparative analysis as a result.If the flow field shows and the Red number of aerodynamic force (pressure) experiments of measuring differs bigger, the flow field display result not only can not play the effect to the aerodynamic characteristic assistant analysis, but also understanding that probably leads to errors and understanding.
At present, what be most widely used in wind-tunnel both at home and abroad is cigarette line (or pipe tobacco) display technique, and its displaying principle is the same with dyeing liquor display technique in the water hole, and actual is the chromonema that shows in the flow field, and shown chromonema is exactly a streamline in steady flow field.For the display effect that obtains, should reduce the turbulent flow percent ripple of Flow Field in Wind Tunnel as far as possible, make the indiffusion of cigarette line with flowing.Yet in having (ε=0.08～0.2%) conventional low-speed wind tunnel of common turbulivity, owing to the raising of turbulent flow pulsation with wind speed increases, the cigarette line is difficult to keep display effect clearly under high wind speed.The aeronautical laboratory of U.S. Notre Dame university has been developed the low turbulence wind tunnel (comprising subsonic wind tunnel and transonic wind tunnel) of big shrinkage ratio, multilayer gauze for this reason, all having obtained cigarette line display photos preferably from low speed to the transonic speed, is the higher laboratory of cigarette line reveal competence during the Flow Field in Wind Tunnel demonstration is tested in the world at present.Thereby owing to thisly reduce cigarette line diffusion and improve method that the cigarette line shows the experiment wind speed and will be referred to the fairly large transformation of wind-tunnel facilities (for example the Notre Dame aeronautical laboratory wind-tunnel shrinkage ratio of using this technology is up to 24 even 48 by reducing wind tunnel experiment section flow field turbulivity, for transonic wind tunnel even reach 150: 1, and at stable section gauze that is provided with more than 12 layers), cost is high, so be difficult in actual applications promote.China has carried out a large amount of research at the COMPLEX FLOW VISUALIZATION technical elements, but these researchs mainly concentrate on exploitation and the application thereof that laser sheet optical/cigarette line shows experimental technique, most experiment wind speed 2～5m/s, and the wind speed of Individual testwas reaches 10～20m/s.Owing to be subjected to the restriction (the generalized case Fluid field shows that the Reynolds number of experiment is lower) that the cigarette line shows the experimental technique development level, flow field/pneumatic being correlated with is not under same Reynolds number, the research of the integrated experimental technique of measuring for wind-tunnel high wind speed smoke demonstration/aerodynamic force (pressure) also launches at home so far as yet.In addition, the DPIV (Digital Particle Image Velocimetry) system (DPIV) that extensively adopts in the current domestic and international wind-tunnel is although can carry out quantitative measurment at stream field under the higher wind, can obtain more detailed cross section Flow Field Distribution feature, but use experience has shown the particle image velocimetry system and not only has been difficult to obtain large scale whole flow field structure picture, can't realize the overall cognitive and the full appreciation of stream field, and the acquisition of correct DPIV (DPIV (Digital Particle Image Velocimetry) system) measurement result is (as image acquisition, follow-up data and Flame Image Process and interpretation of result etc.) must rely on the prior visual understanding of basic flow field.In addition, the equipment cost of DPIV system is high and experiment difficulty and workload is all bigger, if the improper result's that also very easily leads to errors of smoking device and plume method for implanting appearance especially can produce wrong spiral structure and SPATIAL VORTEX architecture, influence is to the analysis of aerodynamic force experimental result.
Although the smog display technique is applied,, often under high wind speed, can not get desirable display effect owing to do not further investigate in that smog generation, smog injection etc. are technical in some researchs.
(3) utility model content:
A kind of high wind speed smoke display device of the utility model, its objective is: at the elongated body of revolution of above-mentioned argumentation with the aircraft at high angle of attack complexity is streamed and Red counts the flow field that exists in the effect study and streams the not cleer and peaceful space of structure cognizing and stream the vortex system structure and change with Reynolds number and wait new peculiar phenomenon greatly, and present domestic wind-tunnel is difficult to reduce this difficulty of existing flow field turbulivity (turbulivity of low-speed wind tunnel is greater than 0.08% usually), by developing novel smoke particle and fuming technology, adopt the smog under the advanced high wind speed to inject, show, record and quantification technology make smog show that the experiment wind speed reaches 60m/s (Red=8 * 10
5) or higher, and sustainable demonstration is for elongated body of revolution with the aircraft at high angle of attack complexity is streamed and Red counts the effect study means that provide the necessary technical.The research that relates to complex flow for modern combat aircraft development and developing advanced aerodynamic arrangement, the big angle of attack aerodynamic characteristic of aircraft etc. provides important laboratory facilities.
A kind of high wind speed smoke display device of the present invention, displaying principle is different from the cigarette line and shows, but be similar to vapor shield display technique in the high-speed wind tunnel, and be mainly used in the spiral structure that shows in the flow field, stream correlation analysis between structure and the aerodynamic characteristics so that carry out aircraft space.If exist the space of vortex to inject an amount of smoke particle in the flow field, these smoke particles will show the structural form and the position of vortex in the flow field as high-speed wind tunnel steam particle.Smog shows has avoided intrinsic weakness in the cigarette line display technique, the present invention (introduces method, the smog introducing amount in flow field by development advanced person's fuming technology (waiting size, followability and the persistence of controlling smoke particle as selecting the suitable medium of being fuming, the method for being fuming) and special smog implantttion technique as smog, and consider that smog introduces the influence of flow characteristics etc.), and improve further that the flow field is observed and recording technique obtains clear, as to can be used for quantitative test flow field, space spiral structure.
A kind of high wind speed smoke display device of the present invention is at first developed special smoke particle, makes smoke particle satisfy the rerum natura requirements such as followability that the flow field shows; Secondly, development smog generation and injection device and technology are guaranteeing on the basis that smog continues to show, improving the visual and anti-high wind speed of smog, and research smog are injected the influencing characteristic of stream field structure; The 3rd, at the lighter problem of smog under the high wind speed, developed advanced illumination and register system, to obtain flow field figure spectrogram preferably; In addition, developed quantification on the basis of the above and determined that aircraft streams the method for vortex system position, space, flow field, be convenient to carry out the correlation analysis of flow field flow pattern and aerodynamic force (pressure) measurement result, and can quantitatively provide the space structure that aircraft streams the flow field, thereby realized the correlation analysis under flow field and the same Reynolds number of aerodynamic force.
Technical scheme of the present invention includes: smoke particle, and aerosol producer, smog injection device and implantttion technique, the pressure monitoring technology, illumination, photograph and video record system, vortex system position, space, flow field quantification is determined technology; Wherein,
(1) smoke particle: adopt nontoxic, edible olive oil as smoke generating agent, the diameter of smoke particle is at 2～5 μ m;
(2) aerosol producer: this aerosol producer is for choosing parts, mainly form by air compressor, pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity etc., its smog produces principle: by the pressurized air of air compressor output, supply with aerosol producer, aerosol producer sends the smoke particle of diameter 2～5 μ m; The principle of work of this aerosol producer is prior art, does not repeat them here;
(3) smog injection device and implantttion technique: the smog injection device mainly is made up of smog by-pass valve, smog introducing pipeline, smog tap hole, and its course of work is as follows: air compressor 1 output top pressure is 5 * 10
5The pressurized air of Pa, supply with aerosol producer, aerosol producer sends the smoke particle of diameter 2～5 μ m, introducing pipeline by smog respectively is incorporated in the smog tap hole of model, by the smog tap hole smog is injected the flow field, the medium that shows the flow field spiral structure is provided, and display space flow field structure picture under the irradiation of the high intensity laser beam sheet light that laser instrument provides is at last by the image recorder recording photograph; Different according to experiment content and requirement, injecting the size of flow field amount of smoke can adjust with the position of injecting the flow field from the smog tap hole, this adjustment can realize by the distribution that changes model surface smog tap hole, the on off state that smog is introduced the operation valve of pipeline, the fine smog that solved injects the interference problem that stream field flows, and the flow field structure photo that can obtain;
(4) pressure monitoring technology: will inevitably have influence on the turbulivity in flow field and the stalling characteristic that model streams because model surface smog injects, and then can have influence on model and stream structure of flow field, thereby influence the aerodynamic characteristic of model, therefore, by pressure tap (being the pressure monitoring hole) is set at model surface, find the influencing characteristic of smog injection phase, smog injection pressure and smog injection mode stream field structure, thereby guaranteed the accuracy and the confidence level of this technology; This pressure monitoring hole is located on certain axial xsect of model, in the experimentation under different smog injection pressures measurement model cross section pressure distribution, when injecting with non smoke the pressure distribution characteristic relatively obtain model is streamed flow field influence smog injection pressure value hour, this value can be used as the smog injection pressure that can use when the flow field shows;
(5) illumination, photograph and video record system: the beam diameter that illuminator employing argon ion continuous wave laser sends is converted to sheet light less than the laser of 5mm through cylindrical mirror, realizes the cross-section of stream field; Register system adopts computer-controlled image recorder to automatically snap, recorded stream field structure picture;
(6) space, flow field vortex system position quantification is determined technology: adopt pre-school, position survey technology, promptly earlier research flow field regions is quantitatively divided, adopt method for multiple exposures with multiple to realize quantitative test then, and analyze in conjunction with numerical analysis and treatment technology comparison film and to obtain quantitative result bit space position, whirlpool.
The present invention's high wind speed smoke display device, the step of its display packing is as follows:
Step 1: the making of device and preparation
(1) smoke particle takes place: adopt nontoxic, edible vegetable oil (as olive oil or soybean wet goods) as smoke generating agent, the diameter of smoke particle satisfies the rerum natura requirements such as followability that the flow field shows at 2～5 μ m;
(2) aerosol producer (Fig. 2): this aerosol producer mainly is made up of pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity etc. for choosing parts;
(3) smog tap hole (Fig. 3): in 100 ° of model leeward sides and 120 ° of positions, every 12.5mm the cross section that is fuming is set from distance head pinnacle 50mm beginning, totally 76 smoke cross sections, preceding 23 cross sections are provided with four ventholes, 53 cross sections, back only are provided with two ventholes, totally 198 ventholes, venthole internal diameter 1mm; Group more than 76 smoke cross sections can be divided into, every group by an aerosol producer confession cigarette;
(4) smog injection device (Fig. 4): air compressor 1 output top pressure is 5 * 10
5The pressurized air of Pa, supply with aerosol producer, aerosol producer sends the smoke particle of diameter 2～5 μ m, introducing pipeline by smog respectively is incorporated in the smog tap hole of model, by the smog tap hole smog is injected the flow field, the medium that shows the flow field spiral structure is provided, and the on off state of the distribution by changing the smog tap hole, the operation valve that smog is introduced pipeline is controlled the size of injecting the flow field amount of smoke and the position of injecting the flow field;
(5) flow field pen recorder (Fig. 4): display space flow field structure picture under the irradiation of the high intensity laser beam sheet light that laser instrument provides, and draw by image recorder recorded stream field pattern;
Step 2: the flow field shows: smog injects and shows (Fig. 3): vegetable oil (as olive oil or soybean wet goods) is put into aerosol producer, the pressurized air of air compressor output is introduced aerosol producer to atomize to vegetable oil, and introduce pipeline by the smoke particle of diameter 2～5 μ m of pressurized air after by smog and be incorporated in the smog tap hole of model atomizing, by the smog tap hole smog is injected the flow field, the medium that shows the flow field spiral structure is provided;
Step 3: pressure monitoring: by pressure tap being set, monitor the influencing characteristic of smog injection phase, smog injection pressure and smog injection mode stream field structure, thereby guaranteed the accuracy and the confidence level of this technology at model surface; This pressure monitoring hole is located on certain axial xsect of model, as shown in Figure 4, in the experimentation under different smog injection pressures measurement model cross section pressure distribution, when injecting with non smoke the pressure distribution characteristic relatively obtain model is streamed flow field influence smog injection pressure value hour, this value can be used as the smog injection pressure that can use when the flow field shows; Fig. 6 has provided under the different incoming flow wind speed the maximum cigarette pressure curve (pressure monitoring) that allows to annotate;
Step 4: flow field record: the beam diameter that employing argon ion continuous wave laser sends is converted to sheet light less than the laser of 5mm through cylindrical mirror, realizes the cross-section of stream field; Adopt computer-controlled image recorder to automatically snap, recorded stream field structure picture;
Step 5: flow field quantification: adopt pre-school, position survey technology, promptly earlier research flow field regions is quantitatively divided, adopt the quantitative test of method for multiple exposures with multiple realization then to bit space position, whirlpool, and analyze in conjunction with numerical analysis and treatment technology comparison film and to obtain quantitative result, be convenient to carry out the correlation analysis of flow field flow pattern and aerodynamic force (pressure) measurement result, and can quantitatively provide the space structure that aircraft streams the flow field, thereby realized the correlation analysis under flow field and the same Reynolds number of aerodynamic force;
A kind of high wind speed smoke display device of the present invention, it includes:
A: smog injection device: mainly introduce pipeline, model, smog tap hole laser instrument and image recorder and form, as shown in Figure 4 by air compressor, aerosol producer, smog.
(a) air compressor:, provide 5 * 10 for choosing parts
5The pressurized air of Pa;
(b) aerosol producer (Fig. 2):, mainly form by pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity etc. for choosing parts.Vegetable oil (as olive oil or soybean wet goods) is put into aerosol producer, the pressurized air introducing aerosol producer that air compressor is exported atomizes to vegetable oil, and by pressurized air the outlet of the smoke particle of atomizing back diameter 2～5 μ m from aerosol producer is sprayed; Importing smog introduces in the pipeline;
(c) smog is introduced pipeline (Fig. 4): the plastic flexible pipe of choosing diameter 50mm is made, and is used as the smog mozzle, and the smog that aerosol producer is sent is incorporated in the smog tap hole of model;
(d) model surface smog tap hole (Fig. 4): in 100 ° of model leeward sides and 120 ° of positions, every 12.5mm the cross section that is fuming is set from distance head pinnacle 50mm beginning, totally 76 smoke cross sections, preceding 23 cross sections are provided with four ventholes, 53 cross sections, back only are provided with two ventholes, totally 198 ventholes, the venthole internal diameter is 1mm; Group more than 76 smoke cross sections can be divided into, every group by an aerosol producer confession cigarette.Smog is introduced pipeline through smog and is incorporated in the smog tap hole of model, by the smog tap hole smog is injected the flow field then, the medium that shows the flow field spiral structure is provided, and the on off state of the distribution by changing the smog tap hole, the operation valve that smog is introduced pipeline is controlled the size of injecting the flow field amount of smoke and the position of injecting the flow field;
B: flow field pen recorder: at first, the argon ion continuous wave laser sends the laser of beam diameter less than 5mm, is converted to sheet light through cylindrical mirror, to showing that the flow field provides high-intensity irradiation, adopt computer-controlled image recorder to automatically snap then, recorded stream field structure picture;
A kind of high wind speed smoke display device of the present invention, its advantage and the effect that reaches are: it is at elongated body of revolution and the aircraft at high angle of attack complexity is streamed and Red counts the flow field that exists in the effect study and streams the not cleer and peaceful space of structure cognizing and stream the vortex system structure and change with Reynolds number and wait new peculiar phenomenon greatly, and present domestic wind-tunnel is difficult to reduce existing flow field this difficulty of turbulivity, by developing novel smoke particle and fuming technology, adopt the smog under the advanced high wind speed to inject, show, record and quantification technology make smog show that the experiment wind speed reaches 60m/s (Red=8 * 10
5) or higher, and sustainable demonstration, for elongated body of revolution with the aircraft at high angle of attack complexity is streamed and Red counts effect study the necessary technology means are provided, the research that relates to complex flow for modern combat aircraft development and developing advanced aerodynamic arrangement, the big angle of attack aerodynamic characteristic of aircraft etc. provides important laboratory facilities.It provides the low-speed wind tunnel high wind speed smoke to show experimental technique with the form of in kind and development report, for the complex flow correlation analysis in aerodynamics field with deeply inquire into Physical Mechanism important experimental tool is provided, therefore, the research that relates to complex flow for modern combat aircraft development and developing advanced aerodynamic arrangement, the big angle of attack aerodynamic characteristic of aircraft etc. provides important laboratory facilities, and is that good facilitation is played in their development.
(4) description of drawings:
The different Red numbers of Fig. 1 are elongated body of revolution cross section pressure distribution characteristic (x/d=3.35, α=50 °) figure down.
Fig. 2 (a) and (b) aerosol producer principle of work synoptic diagram.
Fig. 3 model and smog tap hole distribute and the pressure monitoring hole is provided with figure.
Fig. 4 smog injection device and experimental principle synoptic diagram.
The different incoming flow wind speed of Fig. 5 maximum allowing are down annotated cigarette pressure curve (pressure monitoring) figure.
Influence (V=20m/s, 50 ° of the angles of attack) figure that Fig. 6 smog injection pressure stream field flows.
Number in the figure is as follows:
1 air compressor, 2 aerosol producers, 3 smog are introduced pipeline 4 models
4.1 smog tap hole 5 laser instruments 6 image recorders 7 wind-tunnel
(5) embodiment
The utility model is a kind of high wind speed smoke display device, on the basis of developing advanced smoke particle and aerosol producer, by the smog tap hole being set on one's body at elongated body of revolution prototype, change the mode of throwing in trace particle in traditional FLOW VISUALIZATION experiment, under high wind speed (v=60m/s) experiment condition, obtain laser sheet optical display image clearly, and realized the quantitative measurment of SPATIAL VORTEX position, flow field by pre-school, position survey technology.In addition, realize the monitoring of factor stream field display result influences such as smog injection mode and smog injection pressure by the method that the pressure monitoring ring is set, thereby guaranteed the accuracy that the flow field shows.This smog display technique and simple and easy whirlpool position quantitative measurment technology provide crucial technology platform to the research of carrying out elongated body of revolution Re count problem in the conventional wind tunnel of low speed, for people develop with the Re number to the asymmetric back of the body of slender bodies whirlpool and the understanding of development provides effective laboratory facilities, for the design of advanced aircraft provides important experimental study technology.
The utility model is a kind of high wind speed smoke display device, and its technical scheme includes: smoke particle, aerosol producer, smog injection device and implantttion technique, the pressure monitoring technology, illumination, image recording system, vortex system position, space, flow field quantification is determined technology; Wherein:
(1) smoke particle: adopt nontoxic, edible olive oil as smoke generating agent, the diameter of smoke particle is at 2～5 μ m;
(2) aerosol producer: see also shown in Fig. 2 a, the b; This aerosol producer is for choosing parts, mainly contain air compressor, pressure regulator valve, sprayer, pressurized air kapillary, compositions such as smoke agent outlet kapillary, safety valve and smoke agent cavity, its smog produces principle: by the pressurized air of air compressor output, supply with aerosol producer, aerosol producer sends the smoke particle of diameter 2～5 μ m; The principle of work of this aerosol producer is prior art, does not repeat them here;
(3) smog injection device and implantttion technique: see also shown in Figure 4; This smog injection device mainly is made up of smog by-pass valve, smog introducing pipeline, model 4 and smog tap hole, and its course of work is: air compressor 1 output top pressure is 5 * 10
5The pressurized air of Pa, supply with aerosol producer 2, aerosol producer 2 sends the smoke particle of diameter 2～5 μ m, dividing DLT to cross smog introducing pipeline 3 is incorporated in the smog tap hole 4.1 of model 4, by smog tap hole 4.1 smog is injected the flow field, the medium that shows the flow field spiral structure is provided, and display space flow field structure picture under the irradiation of the high intensity laser beam sheet light that laser instrument 5 provides is at last by image recorder 6 recording photographs; Different according to experiment content and requirement, injecting the size of flow field amount of smoke can adjust with the position of injecting the flow field from smog tap hole 4.1 (as shown in Figure 3), this adjustment can be by changing model 4 the distribution, the on off state that smog is introduced the operation valve of pipeline 3 of smog tap hole 4.1 realize, the fine smog that solved injects the interference problem that stream field flows, and the flow field structure photo that can obtain;
(4) pressure monitoring technology: will inevitably have influence on the turbulivity in flow field and the stalling characteristic that model streams because model surface smog injects, and then can have influence on model and stream structure of flow field, thereby influence the aerodynamic characteristic of model, therefore, by pressure tap being set at model surface, find the influencing characteristic of smog injection phase, smog injection pressure and smog injection mode stream field structure, thereby guaranteed the accuracy and the confidence level of this technology; This pressure monitoring hole is located on certain axial xsect of model, as shown in Figure 3, in the experimentation under different smog injection pressures measurement model cross section pressure distribution, when injecting with non smoke the pressure distribution characteristic relatively obtain model is streamed flow field influence smog injection pressure value hour, this value can be used as the smog injection pressure that can use when the flow field shows, and what Fig. 5 had provided maximum different incoming flow wind speed under allows to annotate cigarette pressure curve (pressure monitoring); Fig. 6 has shown the influencing characteristic of different smog injection pressures to the model surface pressure distribution, the mobile physical arrangement that different pressure distribution curves discloses is different, when smog injection pressure pressure distribution state when the substantial deviation non smoke has been injected during greater than 0.5bar, the flow field result that obtain this moment is incorrect;
(5) image recording system: see also shown in Figure 4ly, illuminator adopts beam diameter that argon ion continuous wave laser 5 the sends laser less than 5mm, is converted to sheet light through cylindrical mirror, realizes the cross-section of stream field; Register system adopts computer-controlled image recorder 6 to automatically snap, recorded stream field structure picture;
(6) space, flow field vortex system position quantification is determined technology: adopt pre-school, position survey technology, promptly earlier research flow field regions is quantitatively divided, adopt method for multiple exposures with multiple to realize quantitative test then, and analyze in conjunction with numerical analysis and treatment technology comparison film and to obtain quantitative result bit space position, whirlpool.
Concrete implementation process is as follows:
＜1 〉. be initiated with 0 ° with the model plane of symmetry that facings the wind, in model cross section ± 100 ° and ± 120 ° locate along the axial arranged smog tap hole of model 4.1 somely, be two row vertically and distribute, as shown in Figure 3;
＜2 〉. with above-mentioned two row smog tap holes 4.1 vertically from the model head to the model afterbody, be divided into three parts, the smog tap hole of every part is introduced pipeline 3 by smog separately and is connected to aerosol producer 2, can whether send smog with realization smog tap hole 4.1 according to the aerosol producers different, that switch is different of requirement of experiment and purpose;
＜3 〉. close the pressure monitoring under aerosol producer and the different smog injection pressures, judge the influence of smog injection pressure stream field structure, thereby determine the maximum smog injection pressure (as illustrated in Figures 5 and 6) that different experiments incoming flow wind speed is allowed down, to guarantee the correct of experimental result;
＜4 〉. on the basis of above-mentioned preparation, experimentize, adopt pre-school, space survey technology that quantification measurement and school survey are carried out in the locus in observed flow field, and adopt computer-controlled image recorder 6 to take, obtain the flow field picture, the space scale that records in conjunction with pre-school carries out the quantification description to the actual flow field structure.
A kind of high wind speed smoke display method of the utility model and device thereof, its embodiment is described below once more:
A kind of high wind speed smoke display device of the utility model, the step of its display packing is as follows:
Step 1: the making of device and preparation
(1) smoke particle takes place: adopt nontoxic, edible olive oil or soybean wet goods vegetable oil as smoke generating agent, the diameter of smoke particle satisfies the rerum natura requirements such as followability that the flow field shows at 2～5 μ m;
(2) aerosol producer (Fig. 2): this aerosol producer mainly is made up of pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity etc. for choosing parts;
(3) smog tap hole 4.1 (Fig. 3): in 100 ° of model leeward sides and 120 ° of positions, every 12.5mm the cross section that is fuming is set from distance head pinnacle 50mm beginning, totally 76 smoke cross sections, preceding 23 cross sections are provided with four ventholes, 53 cross sections, back only are provided with two ventholes, totally 198 ventholes, the venthole internal diameter is 1mm; Group more than 76 smoke cross sections can be divided into, every group by an aerosol producer confession cigarette;
(4) smog injection device (Fig. 4): air compressor 1 output top pressure is 5 * 10
5The pressurized air of Pa, supply with aerosol producer 2, aerosol producer 2 sends the smoke particle of diameter 2～5 μ m, introducing pipeline 3 by smog respectively is incorporated in the smog tap hole 4.1 of model 4, by smog tap hole 4.1 smog is injected the flow field, the medium that shows the flow field spiral structure is provided, and the on off state of the distribution by changing smog tap hole 4.1, the operation valve that smog is introduced pipeline 3 is controlled the size of injecting the flow field amount of smoke and the position of injecting the flow field;
(5) flow field pen recorder (Fig. 4): display space flow field structure picture under the irradiation of the high intensity laser beam sheet light that laser instrument 5 provides, and draw by image recorder 6 recorded stream field patterns;
Step 2: the flow field shows: smog injects and shows (Fig. 3): olive oil or soybean wet goods vegetable oil are put into aerosol producer 2, the pressurized air of air compressor 1 output is introduced 2 pairs of vegetable oil of aerosol producer to atomize, and introduce pipeline 3 by the smoke particle of diameter 2～5 μ m of pressurized air after by smog and be incorporated in the smog tap hole 4.1 of model 4 atomizing, by smog tap hole 4.1 smog is injected the flow field, the medium that shows the flow field spiral structure is provided;
Step 3: pressure monitoring: by pressure tap being set, monitor the influencing characteristic of smog injection phase, smog injection pressure and smog injection mode stream field structure, thereby guaranteed the accuracy and the confidence level of this technology at model surface; This pressure monitoring hole is located on certain axial xsect of model, as shown in Figure 4, in the experimentation under different smog injection pressures measurement model cross section pressure distribution, when injecting with non smoke the pressure distribution characteristic relatively obtain model is streamed flow field influence smog injection pressure value hour, this value can be used as the smog injection pressure that can use when the flow field shows; Fig. 6 has provided under the different incoming flow wind speed the maximum cigarette pressure curve (pressure monitoring) that allows to annotate;
Step 4: flow field record: the beam diameter that employing argon ion continuous wave laser 5 sends is converted to sheet light less than the laser of 5mm through cylindrical mirror, realizes the cross-section of stream field; Adopt computer-controlled image recorder 6 to automatically snap, recorded stream field structure picture;
Step 5: flow field quantification: adopt pre-school, position survey technology, promptly earlier research flow field regions is quantitatively divided, adopt the quantitative test of method for multiple exposures with multiple realization then to bit space position, whirlpool, and analyze in conjunction with numerical analysis and treatment technology comparison film and to obtain quantitative result, be convenient to carry out the correlation analysis of flow field flow pattern and aerodynamic force (pressure) measurement result, and can quantitatively provide the space structure that aircraft streams the flow field, thereby realized the correlation analysis under flow field and the same Reynolds number of aerodynamic force.
A kind of high wind speed smoke display device of the utility model, it includes:
A: smog injection device: mainly introduce pipeline 3, model 4, smog tap hole 4.1, laser instrument 5 and image recorder 6 and form, as shown in Figure 4 by air compressor 1, aerosol producer 2, smog.
(a) air compressor 1: for choosing parts, provide 5 * 10
5The pressurized air of Pa;
(b) aerosol producer (Fig. 2):, mainly form by pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity etc. for choosing parts.Olive oil or soybean wet goods vegetable oil are put into aerosol producer 2,2 pairs of vegetable oil of pressurized air introducing aerosol producer that air compressor 1 is exported atomize, and by pressurized air the outlet of the smoke particle of atomizing back diameter 2～5 μ m from aerosol producer 2 are sprayed; Importing smog introduces in the pipeline 3;
(c) smog is introduced pipeline 3 (Fig. 4): the plastic flexible pipe of choosing diameter 50mm is made, and is used as the smog mozzle, and the smog that aerosol producer 2 is sent is incorporated in the smog tap hole 4.1 of model 4;
(d) model surface smog tap hole 4.1 (Fig. 4): in 100 ° of model leeward sides and 120 ° of positions, every 12.5mm the cross section that is fuming is set from distance head pinnacle 50mm beginning, totally 76 smoke cross sections, preceding 23 cross sections are provided with four ventholes, 53 cross sections, back only are provided with two ventholes, totally 198 ventholes, the venthole internal diameter is 1mm; Group more than 76 smoke cross sections can be divided into, every group by an aerosol producer confession cigarette.Smog is introduced pipeline 3 through smog and is incorporated in the smog tap hole 4.1 of model 4, by smog tap hole 4.1 smog is injected the flow field then, the medium that shows the flow field spiral structure is provided, and the on off state of the distribution by changing smog tap hole 4.1, the operation valve that smog is introduced pipeline is controlled the size of injecting the flow field amount of smoke and the position of injecting the flow field;
B: flow field pen recorder: at first, argon ion continuous wave laser 5 sends the laser of beam diameter less than 5mm, is converted to sheet light through cylindrical mirror, to showing that the flow field provides high-intensity irradiation, adopt computer-controlled image recorder 6 to automatically snap then, recorded stream field structure picture.
Claims (1)
1. high wind speed smoke display device, it includes smog injection device and flow field pen recorder; This smog injection device is introduced pipeline, model, smog tap hole, laser instrument and image recorder by air compressor, aerosol producer, smog and is formed; It is characterized in that: this aerosol producer is made up of pressure regulator valve, sprayer, pressurized air kapillary, smoke agent outlet kapillary, safety valve and smoke agent cavity; The diameter that this smog is introduced pipeline is 50mm; Shape, the structure situation of this model surface smog tap hole are: in 100 ° of model leeward sides and 120 ° of positions, every 12.5mm the cross section that is fuming is set from distance head pinnacle 50mm beginning, totally 76 smoke cross sections, preceding 23 cross sections are provided with four ventholes, 53 cross sections, back only are provided with two ventholes, totally 198 ventholes, the venthole internal diameter is 1mm; Group more than 76 smoke cross sections can be divided into, every group by an aerosol producer confession cigarette.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820123718U CN201382848Y (en) | 2008-11-12 | 2008-11-12 | High wind speed smoke display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820123718U CN201382848Y (en) | 2008-11-12 | 2008-11-12 | High wind speed smoke display device |
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| CN201382848Y true CN201382848Y (en) | 2010-01-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865740A (en) * | 2016-04-13 | 2016-08-17 | 西北工业大学 | Outdoor measuring method for dynamic characteristic of flow field in rising and landing periods of airplane and smoke generating device for measurement |
| CN108414189A (en) * | 2018-01-20 | 2018-08-17 | 南京航空航天大学 | A kind of dyeing liquor delivery device for rotating model water tunnel test |
-
2008
- 2008-11-12 CN CN200820123718U patent/CN201382848Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865740A (en) * | 2016-04-13 | 2016-08-17 | 西北工业大学 | Outdoor measuring method for dynamic characteristic of flow field in rising and landing periods of airplane and smoke generating device for measurement |
| CN105865740B (en) * | 2016-04-13 | 2018-07-10 | 西北工业大学 | Takeoff and landing stage flow field dynamic characteristic open air measuring method and measurement smoking device |
| CN108414189A (en) * | 2018-01-20 | 2018-08-17 | 南京航空航天大学 | A kind of dyeing liquor delivery device for rotating model water tunnel test |
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