CN104535292A - Cryogenic liquid cavitation experimental device - Google Patents
Cryogenic liquid cavitation experimental device Download PDFInfo
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- CN104535292A CN104535292A CN201510004702.1A CN201510004702A CN104535292A CN 104535292 A CN104535292 A CN 104535292A CN 201510004702 A CN201510004702 A CN 201510004702A CN 104535292 A CN104535292 A CN 104535292A
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Abstract
The invention belongs to the technical fields of fluid machinery engineering, cryogenic engineering and aerospace engineering and relates to cavitation experimental devices, in particular to a cryogenic liquid cavitation experimental device. The cryogenic liquid cavitation experimental device comprises a testing segment part, a pressure-regulating tank part and an auxiliary device part. Different from a traditional cavitation experimental device, the cryogenic liquid cavitation experimental device is characterized in that pressure and temperature adjustment is performed on the experimented cryogenic liquid through pressure control, and flowing adjustment is performed through pressure difference between a supply tank part and a collection tank part. The device can achieve synchronous collection of images, pressure data, temperature data and flow data of a cryogenic liquid cavitation flow field, and is good in experiment effect and high in safety; in addition, experiment equipment is easy and portable, convenient to disassemble and carry, small in occupied space and capable of saving experiment area.
Description
Technical field
The present invention relates to cavitation experimental provision, particularly relate to a kind of cryogenic liquid cavitation experimental provision.Belong to fluid machinery engineering, cryogenic engineering and space technology field.
Background technology
When the liquid internal local pressure of uniform temperature is reduced to hold-up vapour pressure, vaporization phenomenon can be produced, the gas be simultaneously dissolved in liquid also can be separated out, form steam bubble (also known as cavity, hole), when behind the place that steam bubble is higher to pressure with liquid flow movement, steam regelation in bubble, steam bubble is crumbled and fall.Cavity Emergence and Development in this liquid stream, the process crumbled and fall, and consequent series of physical and chemical change process are called cavitation.The generation of cavitation often causes machine efficiency to decline and causes the problems such as vibration, noise and material surface destruction, can make machine cisco unity malfunction time serious.
Under normal circumstances, normal atmosphere pressure boiling point can be referred to as cryogenic fluid lower than the element of 120K or compound and their potpourri, and common cryogenic liquid has liquid helium, liquid hydrogen, liquid oxygen, liquid nitrogen, liquefied natural gas (LNG) etc.Due to the material property that cryogenic liquid is special, the physical and chemical process of its cavitation and this complexity of cavitating flows is the study hotspot of association area always.Under normal temperature and pressure, the phase transformation water vapour in container surroundings air is frozen of very easily absorbing heat after cryogenic liquid contacts with air, cover vessel surface, this brings many difficult problems to the cavitation experimental study of cryogenic liquid.
The cryogenic liquid cavitation experimental provision that the basis of traditional cavitation experimental provision is improved needs the main equipments such as annular water hole, a high-power cryopump is needed to realize liquid-circulating, equipment and other servicing units of experiment are many, and the mode of parcel heat-barrier material often can only be adopted to prevent cryogenic liquid heat absorption phase transformation.There is some deficiency following in such experimental facilities: 1, floor area is large, and input cost is many, and operation and maintenance costly; 2, experimental facilities and complex structure, as carried out other types experiment, is inconvenient to change test section, and is difficult to change flow media; 3, heat insulation difference, not easily accomplishes visual inspection, affects cavitation experiment effect 4, experimental provision dynamic adjustments ability, and can not move; 5, poor stability, break once there is experimental provision, cryogenic liquid is gushed out, and very easily damages experimenter; 6, in use procedure, cryogenic liquid consumption is large, causes the more wasting of resources and noise, waste pollution.
Summary of the invention
The object of the invention is the defect in order to overcome prior art, in scientific research, carrying out cavitating flows display and the information of flow collection of Different hypothermia liquid, a kind of cryogenic liquid cavitation experimental provision is provided.
The present invention is achieved through the following technical solutions.
A kind of cryogenic liquid cavitation experimental provision, totally divides quinquepartite: charging-tank part, test section part, holding tank part, compensator part, utility appliance part.
Charging-tank part is used for storing and providing cryogenic liquid, can regulate the pressure and temperature of cryogenic liquid; Comprise charging-tank outer cover, charging-tank inner bag, charging-tank vacuum interface, filter connector, filtrator, charging-tank O-ring seal, charging-tank sensor interface, charging-tank pressurizing valve, charging-tank blowdown valve, the horizontal liquid level gauge of charging-tank, the longitudinal liquid level gauge of charging-tank, annexation: charging-tank outer cover is welded with support, charging-tank support and leg of test rig are bolted, and are fixed on by charging-tank on leg of test rig; Charging-tank outer cover bottom has charging-tank vacuum interface, charging-tank vacuum interface is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, the vacuum state (2-5Pa) that to be as the criterion between tank outer cover and charging-tank inner bag of guaranteeing supply; Cover on upper end outside charging-tank inner bag and charging-tank to realize being tightly connected by ring flange, it is inner that charging-tank inner bag is suspended on charging-tank outer cover; Charging-tank inner bag top is provided with pressurization mouth, pressure modulating opening and charging-tank sensor interface, and charging-tank inner bag bottom is provided with test section water inlet, and charging-tank inner bag inside is provided with the horizontal liquid level gauge of charging-tank and the longitudinal liquid level gauge of charging-tank; Charging-tank inner bag pressurization mouth is connected with from pressure and low-temperature liquid Dewar by pipeline, can cryogenic liquid be injected in charging-tank, after charging liquid at low-temperature, charging-tank inner bag pressurization mouth is connected with the first high pressure nitrogen steel cylinder by pipeline, pipeline is provided with charging-tank pressurizing valve and charging-tank blowdown valve, for improving the pressure in charging-tank inner bag, and ensureing that in inner bag, pressure is not higher than 2 atmospheric pressure, preventing inner bag and Visualization section from breaking; Charging-tank inner bag pressure modulating opening is connected with compensator first pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve, for reducing the pressure in charging-tank inner bag; The longitudinal liquid level gauge of charging-tank is for the volume of liquid in charging-tank inner bag during experiments of measuring device horizontal positioned, the horizontal liquid level gauge of charging-tank is used for after experiments of measuring device turns over clockwise and turn 90 degrees, the vertical volume of liquid in charging-tank inner bag when placing, so that experimental implementation; Be provided with pressure and temperature sensor in charging-tank inner bag, for measuring the pressure and temperature of cryogenic liquid in tank, sensor lead is drawn from charging-tank sensor interface; The test section water inlet of charging-tank inner bag is connected with filtrator by filter connector, and filtrator is connected with turbo flow meter by flange, prevents impurity from entering turbo flow meter and Visualization section; Charging-tank O-ring seal filtrator is equipped with.
Holding tank part flows through the cryogenic liquid of test section part for storing, can regulate the pressure and temperature of cryogenic liquid; Comprise holding tank outer cover, holding tank inner bag, holding tank vacuum interface, holding tank O-ring seal, holding tank sensor interface, holding tank pressurizing valve, holding tank blowdown valve, the horizontal liquid level gauge of holding tank, the longitudinal liquid level gauge of holding tank, annexation: holding tank outer cover is welded with support, holding tank support and leg of test rig are bolted, and are fixed on by holding tank on leg of test rig; Holding tank outer cover bottom has holding tank vacuum interface, holding tank vacuum interface is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, ensures to be as the criterion between holding tank outer cover and holding tank inner bag vacuum state (2-5Pa); Cover on upper end outside holding tank inner bag and holding tank to realize being tightly connected by ring flange, it is inner that holding tank inner bag is suspended on holding tank outer cover; Holding tank inner bag top is provided with pressurization mouth, pressure modulating opening and holding tank sensor interface, and holding tank inner bag bottom is provided with test section water delivering orifice, and holding tank inner bag inside is provided with the horizontal liquid level gauge of holding tank and the longitudinal liquid level gauge of holding tank; Holding tank inner bag pressurization mouth is connected with the second high pressure nitrogen steel cylinder by pipeline, pipeline is provided with holding tank pressurizing valve and holding tank blowdown valve, for improving the pressure in holding tank inner bag, and ensureing that in inner bag, pressure is not higher than 2 atmospheric pressure, preventing inner bag and Visualization section from breaking; Holding tank inner bag pressure modulating opening is connected with compensator second pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve, for reducing the pressure in holding tank inner bag; The longitudinal liquid level gauge of holding tank is for the volume of liquid in holding tank inner bag during experiments of measuring device horizontal positioned, the horizontal liquid level gauge of holding tank is used for after experiments of measuring device turns over clockwise and turn 90 degrees, the vertical volume of liquid in holding tank inner bag when placing, so that experimental implementation; Be provided with pressure and temperature sensor in holding tank inner bag, for measuring the pressure and temperature of cryogenic liquid in tank, sensor lead is drawn from holding tank sensor interface; The test section water delivering orifice of holding tank inner bag is connected with pilot control valve by flange; The test section water delivering orifice pipeline place of holding tank inner bag is provided with holding tank O-ring seal.
The volume of described holding tank inner bag is greater than the volume of described charging-tank inner bag.
Test section part is used for carrying out or stop experiment, carries out visual inspection and experimental data collection, comprise turbo flow meter, corrugated tube, Visualization section outer cover, test section vacuum interface, pilot control valve, Visualization section, Visualization section inlet sensor mounting hole, Visualization section aditus laryngis sensor mounting hole, test section vacuum chamber, annexation: turbo flow meter, Visualization section are connected by pipeline successively with pilot control valve, Visualization section replaceable thus carry out other geometries cavitation experiment, Visualization section periphery is provided with Visualization section outer cover, and Visualization section outer cover plays a supportive role to Visualization section, and Visualization section outer cover is secured by bolts in test section support, Visualization section outer cover is furnished with four transparent observing windows, for testing visual observation, Visualization section outer cover front end and corrugated tube are connected by screw, the thermal deformation that corrugated tube causes for adapting to pipeline internal-external temperature difference, rubber seal is evenly equipped with between Visualization section outer cover surrounding dividing plate, employing screw seals, test section vacuum chamber is formed between Visualization section outer cover and Visualization section, offer test section vacuum interface, test section vacuum interface is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, ensure to be as the criterion between Visualization section outer cover and Visualization section vacuum state (2-5Pa), Visualization section inlet sensor mounting hole and Visualization section aditus laryngis sensor mounting hole is provided with below Visualization section, for setting pressure and temperature sensor, gathered the information of flow of Visualization section entrance non-cavitating region and Visualization section aditus laryngis cavitation generation area by sensor.
As preferably, described Visualization section aditus laryngis height h is the 0.01-0.08 that Visualization section goes out (entering) open height H.
On described Visualization section and Visualization section outer cover, transparent observing window adopts transparent material;
Described Visualization section adopts quartz glass; On described Visualization section outer cover, transparent observing window adopts plexiglas;
Compensator part is used for the pressure reduced fast in charging-tank inner bag and holding tank inner bag; Comprise holding tank pressure regulator valve, breather valve, vacuum pump operation valve, compensator, charging-tank pressure regulator valve, annexation: compensator offers respectively the first pressure modulating opening, the second pressure modulating opening, take out pressure mouth and blow vent, compensator first pressure modulating opening is connected with charging-tank inner bag pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve; Compensator second pressure modulating opening is connected with holding tank inner bag pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve; Compensator is taken out pressure mouth and is connected with the first vacuum pump by pipeline, and pipeline is provided with vacuum pump operation valve, and the first vacuum pump is for reducing the pressure in compensator; Compensator blow vent is communicated with air by pipeline, and pipeline is provided with breather valve, and pressure recover in compensator can be an atmospheric pressure by compensator blow vent, may be used for the cryogenic liquid in emptying experimental provision simultaneously.
Annexation: charging-tank part and holding tank part are secured by bolts in leg of test rig, Visualization section outer cover bolt is fixed on test section support, test section support is secured by bolts in leg of test rig, leg of test rig ensures that experimental provision is in horizontality, swivel bearing can realize the integral-rotation of experimental provision, realizes the overall dextrorotation of experimental provision turn 90 degrees by register pin; Turbo flow meter by Flange joint in test section part, for measuring the flow of the cryogenic liquid flowing into Visualization section in real time; Visualization section outer cover is other is provided with cold light source, and for the illumination of Visualization section, and the least possible cause heat radiation, light source controller is for controlling light source opening and closing and regulating the intensity of light source; Visualization section outer cover is other is provided with high-speed camera, for taking the cavitation image in Visualization section; In charging-tank inner bag and holding tank inner bag, Visualization section inlet sensor mounting hole and Visualization section aditus laryngis sensor mounting hole place, pressure transducer and temperature sensor are all installed, for the pressure and temperature in measurement mechanism and in Visualization section; Data collecting instrument is for gathering the data of pressure transducer, temperature sensor and turbo flow meter; Image and data for controlling the pressure of cavitation image in high-speed camera and data collecting instrument synchronous acquisition Visualization section and relevant position, temperature and data on flows, and store by computing machine.
The test section water inlet of charging-tank inner bag is connected by pipeline with turbo flow meter; Pilot control valve is connected with the test section water delivering orifice of holding tank inner bag by pipeline; Charging-tank vacuum interface, holding tank vacuum interface are all connected with the second vacuum pump by pipeline with test section vacuum interface, before cryogenic liquid adds experimental provision, second vacuum pump continues to take out pressure, ensure that relevant position is as the criterion vacuum state (2-5Pa), also to ensure in process of the test that relevant position is as the criterion vacuum state, experimental provision wraps up and the position having cryogenic liquid to flow without vacuum chamber, all adopts heat-barrier material to wrap up, and absorbs heat vaporize to prevent cryogenic liquid.
Specific works process is as follows:
Ensure before experiment that all valves are all in closed condition, run the second vacuum pump and take out pressure the pressure in charging-tank outer cover, in holding tank outer cover and in Visualization section outer cover is reduced to 2-5Pa, and continuous service takes out pressure, disconnect the connection of the first high pressure nitrogen steel cylinder and charging-tank pressurizing valve, to be connected with charging-tank pressurizing valve from pressure and low-temperature liquid Dewar, open pilot control valve, holding tank pressure regulator valve and breather valve, open charging-tank pressurizing valve, open Dewar valve, cryogenic liquid in Dewar will flow into experimental provision under driving from pressure charging system, first charging-tank inner bag is entered, then holding tank inner bag is flowed into through Visualization section part, after charging liquid at low-temperature, close Dewar valve, charging-tank pressurizing valve, holding tank pressure regulator valve and breather valve, disconnect and being connected with charging-tank pressurizing valve from pressure and low-temperature liquid Dewar, by the connection of the first high pressure nitrogen steel cylinder and charging-tank pressurizing valve, open vacuum pump operation valve, run the first vacuum pump, the pressure in compensator is reduced to 2-5Pa, close vacuum pump operation valve, stop the first vacuum pump, by swivel bearing rotation test device, cryogenic liquid is flowed between charging-tank inner bag and holding tank inner bag back and forth, the temperature of whole device is reached unanimity, then experimental provision is placed in horizontality, is fixed by register pin, open charging-tank pressure regulator valve, pressure in charging-tank inner bag reduces rapidly, cryogenic liquid in holding tank inner bag flows into charging-tank inner bag under differential pressure action, when the cryogenic liquid in holding tank inner bag has flowed soon, close pilot control valve, close charging-tank pressure regulator valve, need ensure to be full of cryogenic liquid in the pipeline of Visualization section and test section part, through aforesaid operations, the pressure in compensator can raise, and adopts the same manner, opens vacuum pump operation valve, runs the first vacuum pump, the pressure in compensator is reduced to 2-5Pa, closes vacuum pump operation valve, stops the first vacuum pump, if open the first high pressure nitrogen cylinder valve, open charging-tank pressurizing valve, in charging-tank inner bag, the pressure of cryogenic liquid can sharply raise, and temperature also can increase, if open charging-tank pressure regulator valve, in charging-tank inner bag, the pressure of cryogenic liquid can sharply reduce, and temperature also can decrease, therefore can experimentally demand, regulate the pressure and temperature of cryogenic liquid in charging-tank inner bag, after adjustment, close corresponding control valve, open holding tank pressure regulator valve, reduce the pressure in holding tank inner bag, make to form pressure reduction before and after pilot control valve, then close holding tank pressure regulator valve, light-source controller controls cold light source is opened, and is adjusted to suitable sources intensity, and the position of adjustment high-speed camera and angle, clearly can photograph the cryogenic liquid in Visualization section, open pilot control valve, experiment starts immediately, cryogenic liquid in charging-tank inner bag will flow to holding tank inner bag through test section part, cryogenic liquid reaches the highest at Visualization section aditus laryngis place flow velocity, pressure reduces, when pressure reduces the saturated vapor pressure of cryogenic liquid at such a temperature, cryogenic liquid is at Visualization section aditus laryngis and aditus laryngis downstream part generation cavitation phenomenon, in cryogenic liquid flowing and cavitation processes, turbo flow meter will measure cryogenic liquid inlet flow rate, the pressure transducer at Visualization section inlet sensor mounting hole place and temperature sensor will measure the pressure and temperature of Visualization section porch cryogenic liquid, the pressure transducer at Visualization section aditus laryngis sensor mounting hole place and temperature sensor will measure the pressure and temperature of Visualization section aditus laryngis place cavitation zone, pressure transducer in charging-tank inner bag and temperature sensor will measure the change of pressure and temperature in charging-tank inner bag, pressure transducer in holding tank inner bag and temperature sensor are by the change of pressure and temperature in measurement collection tank inner bag, the data of all the sensors and flowmeter are all gathered by data collecting instrument and are stored in computing machine, high-speed camera is by the image of shooting Visualization section aditus laryngis place cavitation zone, then be stored in computing machine, the picture of all measurement data and shooting is synchro measure, pressure differential in experimentation before and after pilot control valve reduces gradually, and cryogenic liquid flow velocity reduces gradually, and cavitation phenomenon can close pilot control valve after stopping generation, and suspends data acquisition, completes an experimental observation thus,
After one time experimental observation completes, open the valve of the second high pressure nitrogen steel cylinder, open holding tank pressurizing valve, the pressure in holding tank inner bag is raised, close holding tank pressurizing valve, close the valve of the second high pressure nitrogen steel cylinder; Open charging-tank pressure regulator valve, the pressure in charging-tank inner bag is reduced, make pressure in charging-tank inner bag lower than the pressure in holding tank inner bag; Open pilot control valve, the cryogenic liquid in holding tank inner bag will flow back to charging-tank inner bag, when the cryogenic liquid in holding tank inner bag has flowed soon, close pilot control valve; Readjust the pressure and temperature of cryogenic liquid in charging-tank inner bag by the way, readjust the pressure of cryogenic liquid in holding tank inner bag, reach the experiment condition of setting; Open pilot control valve, new experimental observation once can be carried out.
Have cryogenic liquid vaporizer loss in experimentation unavoidably, if the quantity not sufficient of cryogenic liquid is once tested to complete, then adopt above-mentioned the same manner to annotate in device cryogenic liquid.
Experimental provision can be that axle center dextrorotation turn 90 degrees with swivel bearing, then makes experimental provision be in vertical state by register pin location; Employing same way completes the observation to cryogenic liquid cavitation phenomenon.
After having tested, close the second vacuum pump, disconnect the connection of the second vacuum pump and charging-tank vacuum interface, holding tank vacuum interface and test section vacuum interface, charging-tank inner bag, holding tank inner bag are contacted, the heat absorption vaporization of cryogenic liquid in Acceleration study device with Visualization Duan Junyu surrounding air; Open pilot control valve, holding tank pressure regulator valve, charging-tank pressure regulator valve and vacuum pump operation valve, run the first vacuum pump, the gas in device can be detached device, until cryogenic liquid is all emptying, after cryogenic liquid is emptying, stop the first vacuum pump, close all valves, complete experiment thus.
Carried out by flange between other service pipes and connect.Visualization section and pipeline are also Flange joint, convenient disassembly, unload this test section used install other test section again when carrying out the experiment of other cavitation test sections.
Beneficial effect
1, a kind of cryogenic liquid cavitation experimental provision of the present invention, be different from traditional cavitation experimental facilities, experimental facilities is simple and easy, light, is convenient to dismounting and carrying, takes up room little, save practice ground.
2, a kind of cryogenic liquid cavitation experimental provision of the present invention, adopt vacuum heat-insulation, the impact that effective anti-leak-stopping heat is measured cavitation, dissimilar test section can be applied, can easily change Different hypothermia liquid, the synchro measure of pressure, temperature and image can be carried out test section and cavitation zone.
3, a kind of cryogenic liquid cavitation experimental provision of the present invention, it does not need to connect cryopump and realizes liquid flow, but realizes the flowing of cryogenic liquid by pressure controlled mode, can carry out the adjustment of pressure and temperature to cryogenic liquid, dynamic adjustments ability is strong, experiment condition broad covered area.
4, a kind of cryogenic liquid cavitation experimental provision of the present invention, the required equipment structure of experiment is simple, and component is few, easy to maintenance, and construction and the maintenance cost of experimental provision are low; The overall energy consumption of device is low, and the required Low Temperature Liquid scale of construction of experiment is few, and liquid can repeatedly use, and economizes on resources, emissions reduction.
5, a kind of cryogenic liquid cavitation experimental provision of the present invention, has double-deck insulation blocking and decompression protection, can effectively prevent from experimental provision from breaking and leak the cryogenic liquid caused gushing out, the safety of available protecting experimenter.
Accompanying drawing explanation
Fig. 1 is cryogenic liquid cavitation experimental provision schematic diagram;
Fig. 2 is charging-tank partial interior schematic diagram;
Fig. 3 is holding tank partial interior schematic diagram;
Fig. 4 is test section part schematic front view;
Fig. 5 is test section partial 3-D schematic diagram;
Fig. 6 is Visualization intersegmental part schematic diagram;
Fig. 7 is Visualization section scale diagrams;
Fig. 8 is compensator part schematic front view;
Fig. 9 is compensator partial 3-D schematic diagram.
Wherein, 1-the first high pressure nitrogen steel cylinder, 2-charging-tank outer cover, 3-filtrator, 4-turbo flow meter, 5-leg of test rig, 6-corrugated tube, 7-Visualization section outer cover, 8-test section support, 9-cold light source, 10-light source controller, 11-test section vacuum interface, 12-swivel bearing, 13-pilot control valve, 14-holding tank outer cover, 15-the second high pressure nitrogen steel cylinder, 16-holding tank blowdown valve, 17-holding tank pressurizing valve, 18-data collecting instrument, 19-computing machine, 20-high-speed camera, 21-holding tank pressure regulator valve, 22-the first vacuum pump, 23-breather valve, 24-vacuum pump operation valve, 25-compensator, 26-charging-tank pressure regulator valve, 27-charging-tank pressurizing valve, 28-charging-tank blowdown valve.
The horizontal liquid level gauge of 201-charging-tank inner bag, 202-charging-tank vacuum interface, 203-filter connector, 204-charging-tank O-ring seal, 205-charging-tank sensor interface, 206-charging-tank, the longitudinal liquid level gauge of 207-charging-tank.
The longitudinal liquid level gauge of 1401-holding tank inner bag, 1402-holding tank vacuum interface, 1403-holding tank, 1404-holding tank horizontal liquid level gauge, 1405-holding tank sensor interface, 1406-holding tank O-ring seal.
701-Visualization section, 702-Visualization section inlet sensor mounting hole, 703-Visualization section aditus laryngis sensor mounting hole, 704-test section vacuum chamber.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
Embodiment 1
A kind of cryogenic liquid cavitation experimental provision, totally divides quinquepartite: charging-tank part, test section part, holding tank part, compensator part, utility appliance part.
Charging-tank part, as shown in Figure 2, for storing and providing cryogenic liquid, can regulate the pressure and temperature of cryogenic liquid; Comprise charging-tank outer cover 2, charging-tank inner bag 201, charging-tank vacuum interface 202, filter connector 203, filtrator 3, charging-tank O-ring seal 204, charging-tank sensor interface 205, charging-tank pressurizing valve 27, charging-tank blowdown valve 28, the horizontal liquid level gauge 206 of charging-tank, the longitudinal liquid level gauge 207 of charging-tank, annexation: charging-tank outer cover 2 is welded with 3 supports, charging-tank support and leg of test rig 5 are bolted, and are fixed on by charging-tank on leg of test rig 5; Charging-tank O-ring seal 204 charging-tank outer cover 2 is equipped with, charging-tank outer cover 2 bottom has charging-tank vacuum interface 202, charging-tank vacuum interface 202 is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, the vacuum state (2-5Pa) that to be as the criterion between tank outer cover 2 and charging-tank inner bag 201 of guaranteeing supply; Charging-tank inner bag 201 and charging-tank outer cover 2 realize being tightly connected by ring flange in upper end, and it is inner that charging-tank inner bag 201 is suspended on charging-tank outer cover 2; Charging-tank inner bag 201 top is provided with pressurization mouth, pressure modulating opening and charging-tank sensor interface 205, charging-tank inner bag 201 bottom is provided with test section water inlet, and charging-tank inner bag 201 inside is provided with the horizontal liquid level gauge 206 of charging-tank and the longitudinal liquid level gauge 207 of charging-tank; Charging-tank inner bag 201 mouth that pressurizes is connected with from pressure and low-temperature liquid Dewar by pipeline, can cryogenic liquid be injected in charging-tank, after charging liquid at low-temperature, charging-tank inner bag 201 mouth that pressurizes is connected with the first high pressure nitrogen steel cylinder 1 by pipeline, pipeline is provided with charging-tank pressurizing valve 27 and charging-tank blowdown valve 28, for improving in charging-tank inner bag the pressure in 201, and ensureing that in inner bag, pressure is not higher than 2 atmospheric pressure, preventing inner bag and Visualization section 701 from breaking; Charging-tank inner bag 201 pressure modulating opening is connected with compensator 25 first pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve 26, for reducing the pressure in charging-tank inner bag 201; The longitudinal liquid level gauge 207 of charging-tank is for the volume of liquid in charging-tank inner bag 201 during experiments of measuring device horizontal positioned, after the horizontal liquid level gauge 206 of charging-tank turns over clockwise turn 90 degrees for experiments of measuring device, the vertical volume of liquid in charging-tank inner bag 201 when placing, so that experimental implementation; Be provided with pressure and temperature sensor in charging-tank inner bag 201, for measuring the pressure and temperature of cryogenic liquid in tank, sensor lead is drawn from charging-tank sensor interface 205; The test section water inlet of charging-tank inner bag 201 is connected with filtrator 3 by filter connector 203, and filtrator 3 is connected with turbo flow meter 4 by flange, prevents impurity from entering turbo flow meter 4 and Visualization section 701; Charging-tank O-ring seal 204 filtrator 3 is equipped with.
Holding tank part, as shown in Figure 3, for storing the cryogenic liquid flowing through test section part, can regulate the pressure and temperature of cryogenic liquid; Comprise holding tank outer cover 14, holding tank inner bag 1401, holding tank vacuum interface 1402, holding tank O-ring seal 1406, holding tank sensor interface 1405, holding tank pressurizing valve 17, holding tank blowdown valve 16, the horizontal liquid level gauge 1404 of holding tank, the longitudinal liquid level gauge 1403 of holding tank, annexation: holding tank outer cover 14 is welded with 3 supports, holding tank support and leg of test rig 5 are bolted, and are fixed on by holding tank on leg of test rig 5; Holding tank O-ring seal 1406 holding tank outer cover 14 is equipped with, holding tank outer cover 14 bottom has holding tank vacuum interface 1402, holding tank vacuum interface 1402 is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, ensures to be as the criterion between holding tank outer cover 14 and holding tank inner bag 1401 vacuum state (2-5Pa); Holding tank inner bag 1401 and holding tank outer cover 14 realize being tightly connected by ring flange in upper end, and it is inner that holding tank inner bag 1401 is suspended on holding tank outer cover 14; Holding tank inner bag 1401 top is provided with pressurization mouth, pressure modulating opening and holding tank sensor interface 1405, holding tank inner bag 1401 bottom is provided with test section water delivering orifice, and holding tank inner bag 1401 inside is provided with the horizontal liquid level gauge 1404 of holding tank and the longitudinal liquid level gauge 1403 of holding tank; Holding tank inner bag 1401 mouth that pressurizes is connected with the second high pressure nitrogen steel cylinder 15 by pipeline, pipeline is provided with holding tank pressurizing valve 17 and holding tank blowdown valve 16, for improving in holding tank inner bag the pressure in 1401, and ensure that in inner bag, pressure is not higher than 2 atmospheric pressure, prevent inner bag and Visualization section 701 from breaking; Holding tank inner bag 1401 pressure modulating opening is connected with compensator 25 second pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve 21, for reducing the pressure in holding tank inner bag 1401; The longitudinal liquid level gauge 1403 of holding tank is for the volume of liquid in holding tank inner bag 1401 during experiments of measuring device horizontal positioned, after the horizontal liquid level gauge 1404 of holding tank turns over clockwise turn 90 degrees for experiments of measuring device, the vertical volume of liquid in holding tank inner bag 1401 when placing, so that experimental implementation; Be provided with pressure and temperature sensor in holding tank inner bag 1401, for measuring the pressure and temperature of cryogenic liquid in tank, sensor lead is drawn from holding tank sensor interface 1405; The test section water delivering orifice of holding tank inner bag 1401 is connected with pilot control valve 13 by flange.The test section water delivering orifice pipeline place of holding tank inner bag 1401 is provided with holding tank O-ring seal 1406.
The volume of described holding tank inner bag 1401 is greater than the volume of described charging-tank inner bag 201.
Test section part, as shown in Figure 4, Figure 5, Figure 6 and Figure 7, for carrying out or stopping experiment, carries out visual inspection and experimental data collection, comprise turbo flow meter 4, corrugated tube 6, Visualization section outer cover 7, test section vacuum interface 11, pilot control valve 13, Visualization section 701, Visualization section inlet sensor mounting hole 702, Visualization section aditus laryngis sensor mounting hole 703, test section vacuum chamber 704, annexation: turbo flow meter 4, Visualization section 701 are connected by pipeline successively with pilot control valve 13, Visualization section 701 replaceable thus carry out other geometries cavitation experiment, Visualization section 701 periphery is provided with Visualization section outer cover 7, and Visualization section outer cover 7 pairs of Visualization sections 701 play a supportive role, and Visualization section outer cover 7 is secured by bolts in test section support 8, Visualization section outer cover 7 is furnished with four transparent observing windows, for testing visual observation, Visualization section outer cover 7 front end and corrugated tube 6 are connected by screw, the thermal deformation that corrugated tube 6 causes for adapting to pipeline internal-external temperature difference, rubber seal is evenly equipped with between Visualization section outer cover 7 surrounding dividing plate, employing screw seals, test section vacuum chamber 704 is formed between Visualization section outer cover 7 and Visualization section 701, offer test section vacuum interface 11, test section vacuum interface 11 is connected with the second vacuum pump by pipeline, in experimentation, the second vacuum pump continues to take out pressure, ensure to be as the criterion between Visualization section outer cover 7 and Visualization section 701 vacuum state (2-5Pa), Visualization section inlet sensor mounting hole 702 and Visualization section aditus laryngis sensor mounting hole 703 is provided with below Visualization section 701, for setting pressure and temperature sensor, gathered the information of flow of Visualization section entrance non-cavitating region and Visualization section aditus laryngis cavitation generation area by sensor.
Described Visualization section 701 aditus laryngis height h is that Visualization section 701 goes out 0.04 of (entering) open height H.
Described Visualization section 701 adopts quartz glass; On described Visualization section outer cover 7, transparent observing window adopts plexiglas;
Compensator part, as shown in Figure 8 and Figure 9, for reducing the pressure in charging-tank inner bag 201 and holding tank inner bag 1401 fast; Comprise holding tank pressure regulator valve 21, breather valve 23, vacuum pump operation valve 24, compensator 25, charging-tank pressure regulator valve 26, annexation: compensator 25 offers respectively the first pressure modulating opening, the second pressure modulating opening, take out pressure mouth and blow vent, compensator 25 first pressure modulating opening is connected with charging-tank inner bag 201 pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve 26; Compensator 25 second pressure modulating opening is connected with holding tank inner bag 1401 pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve 21; Compensator 25 is taken out pressure mouth and is connected with the first vacuum pump 22 by pipeline, and pipeline is provided with vacuum pump operation valve 24, first vacuum pump 22 for reducing the pressure in compensator 25; Compensator 25 blow vent is communicated with air by pipeline, and pipeline is provided with breather valve 23, and pressure recover in compensator can be an atmospheric pressure by compensator 25 blow vent, may be used for the cryogenic liquid in emptying experimental provision simultaneously.
Utility appliance part, as shown in Figure 1, experimental provision is supported and rotates, and observation synchronous recording experimental image and flow field data are carried out to Visualization section 701, comprise: turbo flow meter 4, leg of test rig 5, test section support 8, cold light source 9, light source controller 10, swivel bearing 12, data collecting instrument 18, computing machine 19, high-speed camera 20, pressure transducer, temperature sensor, second vacuum pump, annexation: charging-tank part and holding tank part are secured by bolts in leg of test rig 5, Visualization section outer cover 7 bolt is fixed on test section support 8, test section support 8 is secured by bolts in leg of test rig 5, leg of test rig 5 ensures that experimental provision is in horizontality, swivel bearing 12 can realize the integral-rotation of experimental provision, realize the overall dextrorotation of experimental provision by register pin to turn 90 degrees, turbo flow meter 4 by Flange joint in test section part, for measuring the flow of the cryogenic liquid flowing into Visualization section 701 in real time, Visualization section outer cover 7 is other is provided with cold light source 9, and for the illumination of Visualization section, and the least possible cause heat radiation, light source controller 10 is for controlling light source opening and closing and regulating the intensity of light source, Visualization section outer cover 7 is other is provided with high-speed camera 20, for taking the cavitation image in Visualization section 701, in charging-tank inner bag 201 and holding tank inner bag 1401, Visualization section inlet sensor mounting hole 702 and Visualization section aditus laryngis sensor mounting hole 703 place, pressure transducer and temperature sensor are all installed, for the pressure and temperature in measurement mechanism and in Visualization section 701, data collecting instrument 18 is for gathering the data of pressure transducer, temperature sensor and turbo flow meter 4, image and data for controlling the pressure of cavitation image in high-speed camera 20 and data collecting instrument 18 synchronous acquisition Visualization section 701 and relevant position, temperature and data on flows, and store by computing machine 19.
The test section water inlet of charging-tank inner bag 201 is connected by pipeline with turbo flow meter 4; Pilot control valve 13 is connected with the test section water delivering orifice of holding tank inner bag 1401 by pipeline; Charging-tank vacuum interface 202, holding tank vacuum interface 1402 are all connected with the second vacuum pump by pipeline with test section vacuum interface 11, before cryogenic liquid adds experimental provision, second vacuum pump continues to take out pressure, ensure that relevant position is as the criterion vacuum state (2-5Pa), also to ensure in process of the test that relevant position is as the criterion vacuum state, experimental provision wraps up and the position having cryogenic liquid to flow without vacuum chamber, all adopts heat-barrier material to wrap up, and absorbs heat vaporize to prevent cryogenic liquid.
Specific works process is as follows:
Ensure before experiment that all valves are all in closed condition, run the second vacuum pump and take out pressure the pressure in charging-tank outer cover 2, in holding tank outer cover 14 and in Visualization section outer cover 7 is reduced to 2-5Pa, and continuous service takes out pressure, disconnect the connection of the first high pressure nitrogen steel cylinder 1 and charging-tank pressurizing valve 27, to be connected with charging-tank pressurizing valve 27 from pressure and low-temperature liquid Dewar, open pilot control valve 13, holding tank pressure regulator valve 21 and breather valve 23, open charging-tank pressurizing valve 27, open Dewar valve, cryogenic liquid in Dewar will flow into experimental provision under driving from pressure charging system, first charging-tank inner bag 201 is entered, then holding tank inner bag 1401 is flowed into through Visualization section part, after charging liquid at low-temperature, close Dewar valve, charging-tank pressurizing valve 27, holding tank pressure regulator valve 21 and breather valve 23, disconnect and being connected with charging-tank pressurizing valve 27 from pressure and low-temperature liquid Dewar, by the connection of the first high pressure nitrogen steel cylinder 1 with charging-tank pressurizing valve 27, open vacuum pump operation valve 24, run the first vacuum pump 22, the pressure in compensator 25 is reduced to 2-5Pa, close vacuum pump operation valve 24, stop the first vacuum pump 22, by swivel bearing 12 rotation test device, cryogenic liquid is flowed between charging-tank inner bag 201 and holding tank inner bag 1401 back and forth, the temperature of whole device is reached unanimity, then experimental provision is placed in horizontality, is fixed by register pin, open charging-tank pressure regulator valve 26, pressure in charging-tank inner bag 201 reduces rapidly, cryogenic liquid in holding tank inner bag 1401 flows into charging-tank inner bag 201 under differential pressure action, when the cryogenic liquid in holding tank inner bag 1401 has flowed soon, close pilot control valve 13, close charging-tank pressure regulator valve 26, need ensure to be full of cryogenic liquid in the pipeline of Visualization section 701 and test section part, through aforesaid operations, the pressure in compensator 25 can raise, and adopts the same manner, opens vacuum pump operation valve 24, runs the first vacuum pump 22, the pressure in compensator 25 is reduced to 2-5Pa, closes vacuum pump operation valve 24, stops the first vacuum pump 22, if open the first high pressure nitrogen cylinder valve, open charging-tank pressurizing valve 27, in charging-tank inner bag 201, the pressure of cryogenic liquid can sharply raise, and temperature also can increase, if open charging-tank pressure regulator valve 26, in charging-tank inner bag 201, the pressure of cryogenic liquid can sharply reduce, and temperature also can decrease, therefore can experimentally demand, regulate the pressure and temperature of cryogenic liquid in charging-tank inner bag 201, corresponding control valve is closed after adjustment, open holding tank pressure regulator valve 21, reduce the pressure in holding tank inner bag 1401, make to form pressure reduction before and after pilot control valve 13, then close holding tank pressure regulator valve 21, light source controller 10 controls cold light source 9 and opens, and is adjusted to suitable sources intensity, and the position of adjustment high-speed camera 20 and angle, clearly can photograph the cryogenic liquid in Visualization section 701, open pilot control valve 13, experiment starts immediately, cryogenic liquid in charging-tank inner bag 201 will flow to holding tank inner bag 1401 through test section part, cryogenic liquid reaches the highest at Visualization section 701 aditus laryngis place flow velocity, pressure reduces, when pressure reduces the saturated vapor pressure of cryogenic liquid at such a temperature, cryogenic liquid is at Visualization section 701 aditus laryngis and aditus laryngis downstream part generation cavitation phenomenon, in cryogenic liquid flowing and cavitation processes, turbo flow meter 4 will measure cryogenic liquid inlet flow rate, the pressure transducer at Visualization section inlet sensor mounting hole 702 place and temperature sensor will measure the pressure and temperature of Visualization section 701 porch cryogenic liquid, the pressure transducer at Visualization section aditus laryngis sensor mounting hole 703 place and temperature sensor will measure the pressure and temperature of Visualization section 701 aditus laryngis place cavitation zone, pressure transducer in charging-tank inner bag 201 and temperature sensor will measure the change of pressure and temperature in charging-tank inner bag 201, pressure transducer in holding tank inner bag 1401 and temperature sensor are by the change of pressure and temperature in measurement collection tank inner bag 1401, the data of all the sensors and flowmeter are all gathered by data collecting instrument 18 and are stored in computing machine 19, high-speed camera 20 is by the image of shooting Visualization section 701 aditus laryngis place cavitation zone, then be stored in computing machine 19, the picture of all measurement data and shooting is synchro measure, pressure differential in experimentation before and after pilot control valve 13 reduces gradually, and cryogenic liquid flow velocity reduces gradually, and cavitation phenomenon can close pilot control valve 13 after stopping generation, and suspends data acquisition, completes an experimental observation thus,
After one time experimental observation completes, open the valve of the second high pressure nitrogen steel cylinder, open holding tank pressurizing valve 17, the pressure in holding tank inner bag 1401 is raised, close holding tank pressurizing valve 17, close the valve of the second high pressure nitrogen steel cylinder; Open charging-tank pressure regulator valve 26, the pressure in charging-tank inner bag 201 is reduced, make pressure in charging-tank inner bag 201 lower than the pressure in holding tank inner bag 1401; Open pilot control valve 13, the cryogenic liquid in holding tank inner bag 1401 will flow back to charging-tank inner bag 201, when the cryogenic liquid in holding tank inner bag 1401 has flowed soon, close pilot control valve 13; Readjust the pressure and temperature of cryogenic liquid in charging-tank inner bag 201 by the way, readjust the pressure of cryogenic liquid in holding tank inner bag 1401, reach the experiment condition of setting; Open pilot control valve 13, new experimental observation once can be carried out.
Have cryogenic liquid vaporizer loss in experimentation unavoidably, if the quantity not sufficient of cryogenic liquid is once tested to complete, then adopt above-mentioned the same manner to annotate in device cryogenic liquid.
Experimental provision can, with swivel bearing 12 for axle center dextrorotation turn 90 degrees, then make experimental provision be in vertical state by register pin location; Employing same way completes the observation to cryogenic liquid cavitation phenomenon.
After having tested, close the second vacuum pump, disconnect the connection of the second vacuum pump and charging-tank vacuum interface 202, holding tank vacuum interface 1402 and test section vacuum interface 11, make charging-tank inner bag 201, holding tank inner bag 1401 all contacts with surrounding air with Visualization section 701, the heat absorption vaporization of cryogenic liquid in Acceleration study device; Open pilot control valve 13, holding tank pressure regulator valve 21, charging-tank pressure regulator valve 26 and vacuum pump operation valve 24, run the first vacuum pump 22, gas in device can be detached device, until cryogenic liquid is all emptying, after cryogenic liquid is emptying, stop the first vacuum pump 22, close all valves, complete experiment thus.
Carried out by flange between other service pipes and connect.Visualization section 701 and pipeline are also Flange joint, convenient disassembly, unload this test section used install other test section again when carrying out the experiment of other cavitation test sections.
Claims (10)
1. a cryogenic liquid cavitation experimental provision, is characterized in that: totally divide quinquepartite: charging-tank part, test section part, holding tank part, compensator part, utility appliance part;
Charging-tank part comprises charging-tank outer cover (2), charging-tank inner bag (201), charging-tank vacuum interface (202), filter connector (203), filtrator (3), charging-tank O-ring seal (204), charging-tank sensor interface (205), charging-tank pressurizing valve (27), charging-tank blowdown valve (28), the horizontal liquid level gauge (206) of charging-tank, the longitudinal liquid level gauge (207) of charging-tank, annexation: (2) are welded with support to charging-tank outer cover, charging-tank support and leg of test rig (5) are bolted, charging-tank is fixed on leg of test rig (5), charging-tank outer cover (2) bottom has charging-tank vacuum interface (202), and charging-tank vacuum interface (202) is connected with the second vacuum pump by pipeline, charging-tank inner bag (201) and charging-tank outer cover (2) realize being tightly connected by ring flange in upper end, and it is inner that charging-tank inner bag (201) is suspended on charging-tank outer cover (2), charging-tank inner bag (201) top is provided with pressurization mouth, pressure modulating opening and charging-tank sensor interface (205), charging-tank inner bag (201) bottom is provided with test section water inlet, and charging-tank inner bag (201) inside is provided with the horizontal liquid level gauge (206) of charging-tank and the longitudinal liquid level gauge (207) of charging-tank, charging-tank inner bag (201) pressurization mouth is connected with from pressure and low-temperature liquid Dewar by pipeline, after charging liquid at low-temperature, charging-tank inner bag (201) pressurization mouth is connected with the first high pressure nitrogen steel cylinder 1 by pipeline, and pipeline is provided with charging-tank pressurizing valve (27) and charging-tank blowdown valve (28), charging-tank inner bag (201) pressure modulating opening is connected with compensator (25) first pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve (26), charging-tank inner bag is provided with pressure and temperature sensor in (201), and sensor lead is drawn from charging-tank sensor interface (205), the test section water inlet of charging-tank inner bag (201) is connected with filtrator (3) by filter connector (203), filtrator (3) is connected with turbo flow meter (4) by flange, prevents impurity from entering turbo flow meter (4) and Visualization section (701), charging-tank O-ring seal (204) filtrator (3) is equipped with,
Holding tank part comprises holding tank outer cover (14), holding tank inner bag (1401), holding tank vacuum interface (1402), holding tank O-ring seal (1406), holding tank sensor interface (1405), holding tank pressurizing valve (17), holding tank blowdown valve (16), the horizontal liquid level gauge (1404) of holding tank, the longitudinal liquid level gauge (1403) of holding tank, annexation: (14) are welded with support to holding tank outer cover, holding tank support and leg of test rig (5) are bolted, holding tank is fixed on leg of test rig (5), holding tank outer cover (14) bottom has holding tank vacuum interface (1402), and holding tank vacuum interface (1402) is connected with the second vacuum pump by pipeline, holding tank inner bag (1401) and holding tank outer cover (14) realize being tightly connected by ring flange in upper end, and it is inner that holding tank inner bag (1401) is suspended on holding tank outer cover (14), holding tank inner bag (1401) top is provided with pressurization mouth, pressure modulating opening and holding tank sensor interface (1405), holding tank inner bag (1401) bottom is provided with test section water delivering orifice, and holding tank inner bag (1401) inside is provided with the horizontal liquid level gauge (1404) of holding tank and the longitudinal liquid level gauge (1403) of holding tank, holding tank inner bag (1401) pressurization mouth is connected with the second high pressure nitrogen steel cylinder (15) by pipeline, and pipeline is provided with holding tank pressurizing valve (17) and holding tank blowdown valve (16), holding tank inner bag (1401) pressure modulating opening is connected with compensator (25) second pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve (21), for reducing the pressure in holding tank inner bag (1401), holding tank inner bag is provided with pressure and temperature sensor in (1401), and sensor lead is drawn from holding tank sensor interface (1405), the test section water delivering orifice of holding tank inner bag (1401) is connected with pilot control valve (13) by flange, the test section water delivering orifice pipeline place of holding tank inner bag (1401) is provided with holding tank O-ring seal (1406),
Test section part comprises turbo flow meter (4), corrugated tube (6), Visualization section outer cover (7), test section vacuum interface (11), pilot control valve (13), Visualization section (701), Visualization section inlet sensor mounting hole (702), Visualization section aditus laryngis sensor mounting hole (703), test section vacuum chamber (704), annexation: turbo flow meter (4), Visualization section (701) is connected by pipeline successively with pilot control valve (13), Visualization section (701) replaceable thus carry out other geometries cavitation experiment, Visualization section (701) periphery is provided with Visualization section outer cover (7), and Visualization section outer cover (7) is secured by bolts in test section support (8), Visualization section outer cover (7) is furnished with four transparent observing windows, Visualization section outer cover (7) front end and corrugated tube (6) are connected by screw, rubber seal is evenly equipped with between Visualization section outer cover (7) surrounding dividing plate, employing screw seals, test section vacuum chamber (704) is formed between Visualization section outer cover (7) and Visualization section (701), offer test section vacuum interface (11), test section vacuum interface (11) is connected with the second vacuum pump by pipeline, Visualization section (701) below is provided with Visualization section inlet sensor mounting hole (702) and Visualization section aditus laryngis sensor mounting hole (703), for setting pressure and temperature sensor,
Compensator part comprises holding tank pressure regulator valve (21), breather valve (23), vacuum pump operation valve (24), compensator (25), charging-tank pressure regulator valve (26), annexation: compensator (25) offers respectively the first pressure modulating opening, the second pressure modulating opening, take out pressure mouth and blow vent, compensator (25) first pressure modulating opening is connected with charging-tank inner bag (201) pressure modulating opening by pipeline, and pipeline is provided with charging-tank pressure regulator valve (26); Compensator (25) second pressure modulating opening is connected with holding tank inner bag (1401) pressure modulating opening by pipeline, and pipeline is provided with holding tank pressure regulator valve (21); Compensator (25) is taken out pressure mouth and is connected with the first vacuum pump (22) by pipeline, and pipeline is provided with vacuum pump operation valve (24), and the first vacuum pump (22) is for reducing the pressure in compensator (25); Compensator (25) blow vent is communicated with air by pipeline, pipeline is provided with breather valve (23), pressure recover in compensator can be an atmospheric pressure by compensator (25) blow vent, may be used for the cryogenic liquid in emptying experimental provision simultaneously;
Utility appliance part comprises: turbo flow meter (4), leg of test rig (5), test section support (8), cold light source (9), light source controller (10), swivel bearing (12), data collecting instrument (18), computing machine (19), high-speed camera (20), pressure transducer, temperature sensor, second vacuum pump, annexation: charging-tank part and holding tank part are secured by bolts in leg of test rig (5), Visualization section outer cover (7) bolt is fixed on test section support (8), test section support (8) is secured by bolts in leg of test rig (5), leg of test rig (5) ensures that experimental provision is in horizontality, swivel bearing (12) can realize the integral-rotation of experimental provision, realize the overall dextrorotation of experimental provision by register pin to turn 90 degrees, turbo flow meter (4) by Flange joint in test section part, Visualization section outer cover (7) is other is provided with cold light source (9), and light source controller (10) is for controlling light source opening and closing and regulating the intensity of light source, Visualization section outer cover (7) is other is provided with high-speed camera (20), in charging-tank inner bag (201) and holding tank inner bag (1401), Visualization section inlet sensor mounting hole (702) and Visualization section aditus laryngis sensor mounting hole (703) place, be all provided with pressure transducer and temperature sensor, data collecting instrument (18) is for gathering the data of pressure transducer, temperature sensor and turbo flow meter (4), image and data for controlling the pressure of cavitation image in high-speed camera (20) and data collecting instrument (18) synchronous acquisition Visualization section (701) and relevant position, temperature and data on flows, and store by computing machine (19),
The test section water inlet of charging-tank inner bag (201) is connected by pipeline with turbo flow meter (4); Pilot control valve (13) is connected by the test section water delivering orifice of pipeline with holding tank inner bag (1401); Charging-tank vacuum interface (202), holding tank vacuum interface (1402) are all connected with the second vacuum pump by pipeline with test section vacuum interface (11), before cryogenic liquid adds experimental provision, second vacuum pump continues to take out pressure, ensure that relevant position is as the criterion vacuum state, also to ensure in process of the test that relevant position is as the criterion vacuum state, experimental provision wraps up and the position having cryogenic liquid to flow without vacuum chamber, all adopt heat-barrier material to wrap up, absorb heat to prevent cryogenic liquid and vaporize.
2. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: the volume of described holding tank inner bag (1401) is greater than the volume of described charging-tank inner bag (201).
3. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described Visualization section (701) aditus laryngis height h is the 0.01-0.08 of Visualization section (701) entry and exit height H.
4. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described Visualization section (701) and the upper transparent observing window of Visualization section outer cover (7) adopt transparent material.
5. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described Visualization section (701) adopts quartz glass; The upper transparent observing window of described Visualization section outer cover (7) adopts plexiglas.
6. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described Visualization section (701) is replaceable.
7. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, it is characterized in that: described device carries out pressure and temperature adjustment by the cryogenic liquid of Stress control to experiment, controls to carry out flow adjustment by the pressure reduction between charging-tank inner bag (201) and holding tank inner bag (1401).
8. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described Visualization section (701) place, can realize the synchronous acquisition of the image of cryogenic liquid cavitating flow, pressure data, temperature data and data on flows.
9. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, is characterized in that: described swivel bearing (12) can realize the integral-rotation of experimental provision, realizes the overall dextrorotation of experimental provision turn 90 degrees by register pin.
10. a kind of cryogenic liquid cavitation experimental provision as claimed in claim 1, it is characterized in that: described charging-tank inner bag (201), holding tank inner bag (1401) and Visualization section (701) are all wrapped up by vacuum chamber, wrap up and the position having cryogenic liquid to flow without vacuum chamber, all adopt heat-barrier material parcel, absorb heat to prevent cryogenic liquid and vaporize.
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