CN104819824B - Self inhaling injection stream flow behavior integrated testing apparatus system under water - Google Patents
Self inhaling injection stream flow behavior integrated testing apparatus system under water Download PDFInfo
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- CN104819824B CN104819824B CN201410285965.XA CN201410285965A CN104819824B CN 104819824 B CN104819824 B CN 104819824B CN 201410285965 A CN201410285965 A CN 201410285965A CN 104819824 B CN104819824 B CN 104819824B
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Abstract
The invention discloses a kind of Self inhaling injection stream flow behavior integrated testing apparatus system under water, described device system includes self-priming Air nozzle device and floods device two parts, two kinds of devices are made using lucite, wherein self-priming Air nozzle device is located at integrated testing apparatus system top, it is made up of the gentle body turbine flowmeter of self-priming gas jets, device is flooded positioned at integrated testing apparatus system bottom, is made up of press-bearing water tank, safety valve, pressure gauge, target disc and support, pressure measurement cover plate, drain valve and air bleeding valve.The integrated testing apparatus system not only can be observed and tested to Self inhaling nozzle interior biphase gas and liquid flow dynamic characteristic; and the impact flow behavior of nozzle bubble-liquid two-phase jet can be observed and tested; understand its impact property; the nozzle has broad application prospects in terms of water environment protection; such as jet-flow pneumatic sand surfing; the sudden and violent gas of jet improves water quality, and there are river regulation, reservoir and pumping plant desilting, Discussion On Measures of Rivers Pollution Treatment etc. in major project field.
Description
Technical field
The present invention relates to water-jet technology field, more particularly to a kind of one of Self inhaling injection stream flow behavior under water
Change test device system.
Background technology
A kind of low pressure and mass flow self-excitation air suction type jet nozzle (referenced patent document 1 is had been disclosed in the prior art）,
It is for many river courses of China and reservoir sediment accumulation seriousness and how by reservoir bottom sediment incipient motion, suspend
With it is defeated shifting and design, the self-excitation air suction type jet nozzle can be disturbed to silt and carried under one's arms by current and be washed away,
And then efficiently control and reduce river course and reservoir sediment accumulation.Self-excitation air suction type nozzle belongs to low pressure and mass flow nozzle category,
Nozzle interior flows and jet impulse flowing is biphase gas and liquid flow.
Therefore, to the especially biphase gas and liquid flow dynamic characteristic and nozzle gas-liquid of the Self inhaling nozzle interior of huge reservoir under water
The impact characteristics of dual-phase jet are observed and tested, for we deepen Self inhaling injection stream impact property understanding and
The research of nozzle practical application has highly important effect.
And the above-mentioned research for two aspects of Self inhaling injection stream must by a set of nozzle characteristic testing apparatus system come
Complete.The research of various submerged jet technology nozzle characteristic testing apparatus systems is concentrated mainly on high-pressure low-flow and small both at home and abroad at present
Dimensional structure nozzle.
The injection stream flow behavior test device system used in current water jet in the industry correlative study mainly includes
The seal pressure water pot of nozzle and steel structure（Or flood water tank）, it is characterized in nozzle being integrally positioned in seal pressure water pot,
Nozzle arrangements form mainly have conical nozzle, star_shaped nozzle, organ pipe self-vibration cavitating nozzle, self-excited oscillation pulsed jet nozzle,
Venturi scaling type cavitating nozzle etc., the jet media used during research is mainly clear water or abrasive material is added in clear water and shape
Into solid-liquid two-phase flow, be mainly used in research jet fading characteristics, erosion property, cutting performance etc., for above-mentioned three kinds of differences
Research purpose, it is necessary to correspondingly in seal pressure water pot place jet strike test device, erosion property test device, cut
Cut performance testing device etc..
If using existing injection stream flow behavior test device system, then, to the gas of Self inhaling nozzle interior
Liquid two-phase dynamic characteristic and the observation of nozzle bubble-liquid two-phase jet impact characteristics and test will be very difficult.
Also, because self-priming gas jets are integrally placed in the pressure water tank of steel structure by existing nozzle characteristic testing apparatus system
Portion, the volume of meeting build-up of pressure water pot becomes big, adds manufacturing cost and operation difficulty.In addition, self-priming gas jets are integrally placed at
Inside the pressure water tank of steel structure, pressure is equally placed in the air intake duct and test pipeline of connection self-priming gas jets and turbine flowmeter
Inside water pot, squeeze pressure can be produced to air intake duct, when the simulation confined pressure of pressure water tank reaches to a certain degree so as to influence spray
Authenticity and the survey of the inspiratory capacity and Self inhaling performance of mouth, the further internal flow characteristics and hitting power effect of influence nozzle
The accuracy of system testing effect is put in trial assembly.
Therefore, a kind of new-type Self inhaling injection stream flow behavior integrated testing apparatus system how is designed, is not only had
Have small volume, lightweight, the features such as being easy to operation, and structure design can realize nozzle interior and flows outside characteristic simultaneously
Observation and test, eliminate above-mentioned adverse effect, be the problem that current those skilled in the art must solve.
Citation
Patent document 1：CN102069049A
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention proposes a kind of Self inhaling injection stream flow behavior under water
Integrated testing apparatus system, the integrated testing apparatus system is by self-priming Air nozzle device and floods device and constitutes, and it is processed
Material uses lucite, it is possible to achieve impact special to Self inhaling nozzle interior gas liquid two-phase flow and nozzle bubble-liquid two-phase jet
The observation and test of property, understand its impact property；And self-priming Air nozzle device is placed in the outer upper for flooding device, eliminate
Influence of the confined pressure for pumping property of device is flooded, the degree of accuracy of test is improved, while alleviating the overall body of test device
Product and weight.
The technical solution adopted in the present invention is：
The invention provides a kind of Self inhaling injection stream flow behavior integrated testing apparatus system, including self-priming under water
Air nozzle device and two parts of device are flooded, two parts are connected by ring flange, surrounding is subject to long bolt mounting flange and consolidated
It is fixed.
The self-priming Air nozzle device of the present invention is made up of the gentle body turbine flowmeter of self-priming gas jets, wherein self-priming gas jets
By top nozzle, cavity, air intake duct, lower nozzle composition, using pmma material, positioned at the top of integrated apparatus system, with
Nozzle is arranged on inside press-bearing water tank and compared, and arrangement and the material selection of air intake duct are easier to.Air intake duct, which is arranged in, floods device
, it is necessary to set air intake duct to export on press-bearing water tank when internal, due to being directly connected after air-breathing with air, overpressure after air-breathing
For atmospheric pressure, and confined pressure is high in press-bearing water tank, can cause air intake duct compression, cause inspiratory capacity to decline to a great extent.
The top nozzle of self-priming gas jets uses contraction structure, and diameter is gradually reduced to lower jet expansion from top nozzle entrance,
Can ensure that the velocity flow profile inside top nozzle is more uniform, and energy loss is small, top nozzle outlet diameter have to flow velocity compared with
The flow behavior and the whirlpool size of jet core both sides of jet core in big influence, influence nozzle.
The cavity body structure size of self-priming gas jets is controlled by the shape of chamber length, chamber footpath and impact walls, and impact walls are to incline
Biassed fabric is preferred, and inclined impact wall can ensure the symmetrical whirlpool that jet core both sides are formed, and not only size is big for this whirlpool, and whirlpool
Whirlpool immediate vicinity pressure is negative pressure, well below atmospheric pressure, it is ensured that nozzle air-breathing.Chamber length and the size and proportion relation pair in chamber footpath
Nozzle inspiratory capacity and impact property have considerable influence, it is necessary to determined according to experiment.
The lower nozzle of self-priming gas jets is that pipe equal diameter structure or diameter gradually taper up structure, is used according to practical application
Different structures, if to lower jet expansion impulsive force require it is higher, can take and gradually taper up structure, it is on the contrary then using etc. directly
Gauge structure.Lower nozzle outlet diameter be more than top nozzle outlet diameter, its size have to the inspiratory effects and impact property of nozzle compared with
Big influence, it is necessary to determined according to experiment.
The air-breathing tube material of self-priming gas jets is processed using common plastics tube, and suction hole location arrangements are near symmetrical whirlpool
Wall, close to impact walls under cavity, this position can make air enter cavity by air intake duct quickly, and inspiratory effects preferably, are inhaled
In nozzle interior formation biphase gas and liquid flow after gas, changed fluidal texture, nozzle cumulative effect is good, improve its impact
Performance.Formation of the air-breathing pipe diameter to jet core both sides gas collar vortex size has considerable influence, and then has influence on inspiratory capacity and punching
Hit performance, it is necessary to determine according to experiment.Because self-priming gas jets are designed using lucite, so being readily viewed spray
Gas liquid two-phase flow structure inside mouth, takes advanced flowing test technology exactly to be obtained to its flow behavior.
Gas turbine meter measures the inspiratory capacity size of nozzle, is connected with the air intake duct of nozzle, and junction sets one
Individual transition apparatus, multiple air intake ducts are connected with the entrance of flowmeter, and easily nozzle total air-breathing amount can be measured.
In order to prevent aqueous reflux from entering gas turbine meter, gate valve is installed at flowmeter import.
The present invention flood device by press-bearing water tank, safety valve, pressure gauge, target disc and support, pressure measurement cover plate, drain valve and
Air bleeding valve etc. is constituted, positioned at the bottom of integrated apparatus system.
Flood the press-bearing water tank of device its main function and be subject to confined pressure, to simulate underwater environment.For the ease of processing,
Using cylinder design, water flows through nozzle air-breathing and forms biphase gas and liquid flow after being sufficiently mixed inside it, is then injected into
Press-bearing water tank.Similar with the self-priming gas jets, press-bearing water tank also uses pmma material, and easily observation injection stream is not
With the bubble-liquid two-phase jet fluidal texture under confined pressure and under operating pressure, advanced flowing test technology is taken to be flowed to it
Characteristic is obtained exactly.
The safety valve and pressure gauge for flooding device are mainly arranged in the upside of press-bearing water tank, and the safety valve is mainly used in protecting
The safe operation of press-bearing water tank is demonstrate,proved, the pressure operating range of safety valve is between 0.1Mpa-0.8Mpa.When pressure is born more than it
During ability, automatically open up and pressure release, the pressure gauge is used to test the confined pressure of press-bearing water tank.
The target disc for flooding device is primarily subjected to the surge of injection stream, and different pressure taps, target are set on target disc
The diameter annular packing ring equal with target disc of varying number is provided below in disk, to adjust lower jet expansion and target disc away from
From.When pad quantity is different, the distance of nozzle off-target disk is different, and its pressure tap surge distribution character is also different
, according to these data can analyze optimal spray away from and shock-diffusion scope, compare nozzle rushing in air-breathing and non-air-breathing
Hit the quality of performance.
The pressure measurement cover plate for flooding device is arranged in the downside of press-bearing water tank, for receiving the Self inhaling injection stream on target disc
Surge, the pressure transmission point of pressure measurement cover plate is consistent with the Disposal of Pressure Detecting Point and quantity on target disc, by flange with it is described
Press-bearing water tank is connected, and pressure-measuring pipe is set between pressure measurement cover plate and target disc pressure tap, so as to transmission target disc pressure signal.
The air bleeding valve for flooding device is arranged on the upside of the press-bearing water tank, to exclude gas in press-bearing water tank.Because
The substantial amounts of gas of press-bearing water tank internal reservoir can be made after self-priming gas jets air-breathing, gas floats up to tank top, and air is in pressure-bearing
Water tank confined pressure is easily compressed when higher, can influence the accuracy of press-bearing water tank confined pressure, so gas must be discharged regularly.
The drain valve for flooding device is located at the bottom of press-bearing water tank, by adjusting its aperture size, control Flow-rate adjustment institute
The confined pressure of press-bearing water tank is stated, confined pressure scope is can adjust between 0.1Mpa-0.8Mpa, can also be in integrated testing apparatus system
Water in press-bearing water tank is discharged when out of service.
Brief description of the drawings
Fig. 1 is Self inhaling nozzle section figure of the invention；
Fig. 2 is integrated apparatus system profile of the invention；
Fig. 3 is gland plate plan of the invention；
Fig. 4 is target disc pad plan of the invention；
Marked in figure:
1- working barrels；2- force (forcing) pumps；3- inlet channels；4- top nozzles；5- cavitys；Nozzle under 6-；7- air intake ducts；8- is collided
Wall；9- pressure gauges；10- safety valves；11- ring flanges；12- press-bearing water tanks；13- target discs；14- pads；15- target disc supports；16- is arranged
Air valve；17- pressure measurement cover plates；18- drain valves；19- gas turbine meters；20- pressure-measuring pipes；21- target disc pressure taps；22- pressure measurement
Cover plate pressure tap；23- bolts；24- ring flanges；25- tapping pipes；26- long bolts.
Embodiment
The core of the present invention, should to provide a kind of Self inhaling injection stream flow behavior integrated testing apparatus system under water
Apparatus system can realize submerged jets under the driving of working barrel 1 and force (forcing) pump 2；Because nozzle is arranged on outside press-bearing water tank 12
Portion, can greatly reduce the volume of press-bearing water tank 12, easy to operate, and manufacturing cost can be saved again；Pass through the power of adjustment work pump 1
Jet intensity and confined pressure can be adjusted with the aperture of drain valve 18；Overall processing material is lucite, can be with Real Time Observation, shooting
With biphase gas and liquid flow dynamic characteristic inside test nozzles and nozzle bubble-liquid two-phase jet impact characteristics；When the diameter of press-bearing water tank 12 is more than
During equal to 50cm, its side wall influences very little to jet, approximately can truly simulate submerged jets and save material again simultaneously.
In order that those skilled in the art is better understood from technical scheme, it is below in conjunction with the accompanying drawings and specific real
Applying example, the present invention is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, Self inhaling injection stream flow behavior integrated testing device system of the invention
System, it includes self-priming Air nozzle device and floods device, and both are connected by ring flange 11, and surrounding is subject to the connection method of long bolt 26
Blue disk is fixed.Self-priming Air nozzle device includes the gentle body turbine flowmeter 19 of self-priming gas jets, and wherein self-priming gas jets are by upper spray
Mouth 4, cavity 5, lower nozzle 6 and air intake duct 7 are constituted, and air intake duct 7 is located at 1/3 position away from impact walls 8 of cavity 5, air intake duct
Circumferentially 4, air intake duct is connected with gas turbine meter 19, and inlet channel 3 is connected with working barrel 1 and force (forcing) pump 2.
Flood device by press-bearing water tank 12, safety valve 10, pressure gauge 9, target disc 13 and pad 14, target disc support 15, pressure measurement cover plate 17, let out
Water valve 18 and the grade of air bleeding valve 16 composition, safety valve 10, pressure gauge 9 and air bleeding valve 16 are located at the top of press-bearing water tank 12, and pressure measurement lid
Plate 17 and drain valve 18 are located at bottom, and Fig. 3 gives pressure measurement cover plate Disposal of Pressure Detecting Point figure, and drain valve 18 is arranged on tapping pipe 25
On, tapping pipe 25 is connected by ring flange 24 with drainage pipeline.Target disc 13 is located inside device, and target disc 13 and pad 14 pass through spiral shell
Bolt 23 links together, and the Disposal of Pressure Detecting Point mode of target disc 13 is identical with pressure measurement cover plate 17, the pressure tap of target disc 13 and pressure measurement cover plate 17
Pressure tap 22 is connected by pressure-measuring pipe 20.
When implementing the test device of the present invention, the import gate valve of gas turbine meter 19 is closed first, target disc 13 is adjusted,
It is allowed to vertical with the holding of self-priming Air nozzle device, drain valve 18 is closed, and press-bearing water tank 12 fills water, Ran Houkai by force (forcing) pump 2
Working barrel 1 is opened, the simulation confined pressure size in the control press-bearing water tank 12 of drain valve 18 is opened.Water flows through inlet channel 3 and enters self-priming
Gas jets, treat after working stability, open the import gate valve of gas turbine meter 19, gas enters air intake duct and entered in nozzle
Portion, can observe and record the size of inspiratory capacity by gas turbine meter 19.Water flows through self-priming gas jets and entered with air intake duct 7
The gas mixing entered, forms biphase gas and liquid flow, projects, impacted on target disc 13 through lower nozzle 6, the pressure tap 21 on target disc 13
Pressure signal is produced, is sent to through pressure-measuring pipe 20 at pressure measurement cover plate 17, is resent to signal acquiring system（Not shown in figure）, lead to
Cross observation, shoot and test Self inhaling nozzle interior flow behavior and nozzle bubble-liquid two-phase jet impact characteristics, obtain nozzle
The impact property parameter such as impulsive force size and shock-diffusion scope.
Self inhaling injection stream flow behavior integrated testing apparatus system in the course of the work, can pass through working barrel 1
The operating pressure of nozzle water jet is adjusted, the confined pressure size in press-bearing water tank 12 is controlled by the aperture of drain valve 18, is observed
With the Self inhaling nozzle interior flow behavior under test different operating pressure and different confined pressures and the impact of nozzle bubble-liquid two-phase jet
Characteristic, understands its impact property.
During Self inhaling injection stream flow behavior integrated testing apparatus system off-test, drain valve 18 is first opened completely
Complete pressure release simultaneously closes off the import gate valve of gas turbine meter 19 to prevent press-bearing water tank reclaimed water from flowing back to damage to ensure safety
Bad tester, then closes force (forcing) pump 2 and working barrel 1 successively.
Self inhaling injection stream flow behavior integrated testing apparatus system in the course of the work, changes target disc pad 14 and counted
Amount can adjust its distance exported with lower nozzle 6, form different jet lengths, the impact observed and test under different ranges
The impact property parameter such as power size and shock-diffusion scope, finds the optimal jet length of self-priming gas jets.
Self inhaling injection stream flow behavior integrated testing apparatus system can also be under same operating pressure and confined pressure
The chamber length of Self inhaling nozzle chamber 5, chamber footpath and lower nozzle diameter carry out it is preferred, observation and test different cavity length, chamber footpath and under
Biphase gas and liquid flow dynamic characteristic and nozzle bubble-liquid two-phase jet impact characteristics inside nozzle diameter, contrast impulsive force size and impact
The impact property parameter such as range of scatter, can find the optimal proportion scope of chamber length, chamber footpath and lower nozzle diameter.
Claims (5)
1. a kind of Self inhaling injection stream flow behavior integrated testing apparatus system under water, the apparatus system is used to study self-priming
Biphase gas and liquid flow dynamic characteristic and nozzle bubble-liquid two-phase jet impact characteristics inside gas jets, it is characterised in that：The integration
Test device system is by self-priming Air nozzle device and floods two parts of device and constitutes, and wherein self-priming Air nozzle device is integrally located at
The outer upper of device is flooded, is directly connected to flooding device；The self-priming Air nozzle device is by the gentle body whirlpool of self-priming gas jets
Flowmeters are constituted；Self-priming gas jets are processed using lucite, its by top nozzle, cavity, air intake duct, impact walls and under
Nozzle is constituted；The top nozzle uses diminishing contraction structure, and its inlet diameter is identical with water inlet pipe diameter；The cavity
The impact walls of bottom are to be obliquely installed；The lower nozzle is isodiametric circular tube structure；The air intake duct be arranged on cavity away from
At the position of impact walls 1/3；The device that floods includes press-bearing water tank, safety valve, pressure gauge, target disc and support, pressure measurement cover plate, let out
Water valve and air bleeding valve；The press-bearing water tank is the closed structure processed using lucite, the confined pressure born by it come
Simulate underwater environment；The target disc is fixed on the press-bearing water tank by support, a number of pressure measurement of target disc surface layout
Distance of a number of pad to adjust lower jet expansion and target disc is disposed below in point, target disc；The pressure measurement cover plate and institute
State press-bearing water tank to connect using ring flange, connected between pressure measurement cover plate and target disc by pressure-measuring pipe, to transmit surge；Institute
State drain valve to be arranged on tapping pipe, the confined pressure for adjusting press-bearing water tank, and can discharge the water inside press-bearing water tank,
Tapping pipe is connected by ring flange with drainage pipeline.
2. the injection stream of Self inhaling under water flow behavior integrated testing apparatus system according to claim 1, its feature
It is：The gas turbine meter is used to measure the total air-breathing amount of self-priming gas jets.
3. the injection stream of Self inhaling under water flow behavior integrated testing apparatus system according to claim 1, its feature
It is：The connection for flooding device and the self-priming Air nozzle device is using ring flange connection, and surrounding is subject to long bolt connection
Ring flange is fixed.
4. the injection stream of Self inhaling under water flow behavior integrated testing apparatus system according to claim 1, its feature
It is：The safety valve and pressure gauge are used for the control and test for flooding device confined pressure, and safety valve is applicable pressure limit and is
0.1Mpa-0.8Mpa。
5. the injection stream of Self inhaling under water flow behavior integrated testing apparatus system according to claim 1, its feature
It is：The device and the self-priming Air nozzle device of flooding is to be integrally formed using 3D printing technique.
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| CN108225728B (en) * | 2018-01-09 | 2020-06-02 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for measuring and calculating relationship between jet velocity and air carrying capacity |
| CN108240899B (en) * | 2018-01-16 | 2024-05-14 | 上海衡拓液压控制技术有限公司 | Jet flow detection device and method for jet flow tube type electrohydraulic servo valve nozzle |
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| CN113834747B (en) * | 2021-09-22 | 2024-02-23 | 兰州理工大学 | Visual experiment system and method for hydraulic valve port submerged jet erosion |
| CN114136650A (en) * | 2021-11-05 | 2022-03-04 | 新乡航空工业(集团)有限公司 | Gas-liquid two-phase flow mixing test box device |
| CN114486223B (en) * | 2022-01-27 | 2023-01-31 | 中国海洋大学 | Experimental device and experimental method for measuring impact force of high-pressure water jet nozzle |
| CN114965134A (en) * | 2022-08-02 | 2022-08-30 | 北京科技大学 | Device and method for testing cavitation erosion resistance of material |
| CN114964718B (en) * | 2022-08-02 | 2022-10-11 | 北京科技大学 | Device and method for detecting jet cavitation and oscillation characteristics in confining pressure environment |
| CN116593126B (en) * | 2023-07-11 | 2023-09-15 | 中国石油大学(华东) | Cavitation performance evaluation method of cavitation nozzle |
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| Title |
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| 深水自激吸气脉冲射流喷嘴性能的试验研究;高传昌 等;《人民黄河》;20140331;第36卷(第3期);第17-18、第22页 * |
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| CN104819824A (en) | 2015-08-05 |
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