Sweat coolling test macro and test method based on oxy-acetylene platformTechnical field
The present invention relates to a kind of Sweat coolling test macros and test method based on oxy-acetylene platform, belong to aerospaceThermal protection technology field.
Background technique
In the serious aerothermal load that aerospace field, supersonic aircraft are born, aircraft surface may causeShape changes, or even reduces the structural strength and rigidity of aircraft, influences the normal flight of aircraft.Therefore, thermal protection is setSystem eliminate aerothermal load bring adverse effect it is particularly significant, this be also develop Near Space Flying Vehicles key technology itOne.Currently, the development of ablative thermal protection system comparative maturity, but keeping flight vehicle aerodynamic dimensional stability, improving strike essenceAccuracy etc., there is also certain limitations for ablative thermal protection system, and Sweat coolling mode can make up the deficiency of this system.Sweat coolling mode has the characteristics that reusable, there is huge development potentiality in thermal protection system.But, existing skillDo not occur the Sweat coolling test macro that accurate calibration is carried out to flame based on oxy-acetylene platform in art also.In addition, in sweatingIn cooling test macro, how the surface temperature of the Sweat coolling test specimen under constant heat flux environment to be reduced to acceptableIt is the technical problem of current urgent need to resolve in range.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of Sweat coolling test macro based on oxy-acetylene platform andTest method controls the temperature of Sweat coolling surface of test piece, surface of test piece temperature is reduced to by adjusting the flow of coolantZone of reasonableness.
Sweat coolling test macro of the present invention based on oxy-acetylene platform, comprising: cooling agent regulating, hot-fluidSensor, oxyacetylene torch generating device, Sweat coolling test specimen, infrared temperature measurement apparatus and panel control system, the oxy-acetyleneFlame generating device is used to generate thermal-flame in the external of Sweat coolling test specimen；The heat flow transducer setting is in oxy-acetylene fireThe outside of flame generating device, for demarcating oxyacetylene torch generating device flame hot-fluid size, the cooling agent regulating is setIt sets in the outside of Sweat coolling test specimen, for providing the coolant of certain flow to Sweat coolling test specimen；The infrared measurement of temperature dressSet for measure test during Sweat coolling test specimen surface temperature；The panel control system passes through conducting wire and oxy-acetylene fireFlame generating device, cooling agent regulating, heat flow transducer and infrared temperature measurement apparatus are separately connected.
Transpiration cooling material test specimen is processed as required.In sample preparation, also need to pacify by requirement of experiment at the test specimen back sideCooling water pipeline is filled, cooling agent regulating is connected, opens panel control system switch, display screen is shown normally；Open oxygen secondAlkynes flame generating device switch is passed since heat flow transducer output potential is directly proportional to flame hot-fluid by acquisition hot-fluidThe output voltage of sensor carrys out the good flame hot-fluid size of accurate calibration.After equal hot-fluids are stablized, Sweat coolling test specimen is moved into high temp fireIn flame.Record the output valve of hot-fluid, infrared temperature measurement apparatus and coolant flow.Coolant is adjusted by cooling agent regulatingThe temperature of flow control Sweat coolling surface of test piece is big with hot-fluid without the Sweat coolling surface of test piece temperature of material for testingSmall variation relation is compensated for currently without the Sweat coolling test for being exclusively based on oxy-acetylene platform to flame progress accurate calibrationPlatform.
Further, system further includes cooling water circulating device, cooling water circulating device setting in Sweat coolling test specimen andThe outside of heat flow transducer is handled for cooling.
Further, system further includes auto-focusing imager, and auto-focusing imager connects panel control system.
Further, the inner surface of Sweat coolling test specimen be equipped with temperature sensor and pressure sensor, temperature sensor andPressure sensor connects panel control system.
Further, oxyacetylene torch generating device include the first digital flowmeter, oxygen cylinder, the second digital flowmeter,Acetylene gas bottle and oxyacetylene torch generator；Oxygen cylinder and acetylene gas bottle are connected to oxyacetylene torch by gas pipelineDevice；The first digital flowmeter, the acetylene gas bottle and institute are provided between the oxygen cylinder and the oxyacetylene torch generatorIt states and is provided with the second digital flowmeter between oxyacetylene torch generator.
Further, cooling agent regulating includes cooling fluid tank, digital metering pump and first pipe, and coolant passes through instituteIt states first pipe to be injected into inside Sweat coolling test specimen, the digital metering pump injects flow for regulating and controlling coolant.
Further, the lower section of Sweat coolling test specimen is equipped with sample stent, is equipped with and leads below the sample stentRail, for moving Sweat coolling test specimen.
Further, cooling water circulating device includes second pipe, water pump and cooling water tank, passes through cooling water circulating deviceHeat flow transducer and sample stent are cooled down.
Sweat coolling test method of the present invention based on the Sweat coolling test macro, comprising the following steps:
S1: after preparing Sweat coolling test specimen by test requirements document, first pipe, the are installed at the Sweat coolling test specimen back sideTwo pipelines, temperature sensor and pressure sensor；
S2: Sweat coolling test specimen is mounted on sample stent, connects cooling agent regulating, temperature sensor, pressureSensor, cooling water circulating device and auto-focusing imager；
S3: opening the switch of panel control system, until display screen is normally shown；Open heat flow transducer and oxy-acetyleneThe switch of flame generating device passes through the good flame hot-fluid size of heat flow transducer accurate calibration；After equal hot-fluids are stablized, by test specimen edgeBe slowly moved into thermal-flame by guide rail；The temperature of Sweat coolling surface of test piece is measured by infrared temperature measurement apparatus；
S4: the defeated of heat flow transducer, temperature sensor and pressure sensor, infrared temperature measurement apparatus and coolant flow is recordedIt is worth out；
S5: constantly regulate the flow of coolant by cooling agent regulating, constant to Sweat coolling surface of test piece temperatureWhen, off-test；When closing instrument, oxyacetylene torch generating device and heat flow transducer are first closed first, check that arrangement is errorlessAfterwards, cooling agent regulating, cooling water circulating device, temperature sensor, pressure sensor, infrared temperature measurement apparatus, face are turned offPanel control system；
S6: handling the experiment parameter recorded in step S5, obtains thermal-flame hot-fluid and Sweat coolling test specimenSurface temperature variation relation.
Compared with prior art, the present invention having the following beneficial effects:
Sweat coolling test macro and test method of the present invention based on oxy-acetylene platform, by adjusting cooling waterThe temperature of flow control Sweat coolling surface of test piece can be by Sweat coolling surface of test piece temperature under constant hot-fluid environmentDegree is reduced in acceptable range, compensates for the sweating for carrying out accurate calibration to flame based on oxy-acetylene platform in the prior artThe blank of cooling test platform；The test macro can test the Sweat coolling test specimen temperature and hot-fluid size of different materialsVariation；The test macro is easy to operate, is easy to build, is convenient to teaching experiment and scientific research；The test macro is close to flightThe true external environment of device flight, can obtain the thermal-flame hot-fluid of variation, the pass of cooling water flow and surface of test piece temperatureSystem.
Detailed description of the invention
The present invention has following attached drawing:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the temperature measurement result curve graph of test method of the invention under the conditions of a certain；
Fig. 3 is the temperature measurement result curve graph of test method of the invention in an other condition.
In figure: the cooling agent regulating of 1-；101- cooling fluid tank；102- digital metering pump；103- first pipe；2- is coolingWater circle device；201- second pipe；202- water pump；203- cooling water tank；3- temperature sensor；4- sample stent；5- guide rail；6- heat flow transducer；7- oxyacetylene torch generating device；The first digital flowmeter of 701-；702- oxygen cylinder；The second number of 703-Flowmeter；704- acetylene gas bottle；705- oxyacetylene torch generator；8- auto-focusing imager；9- Sweat coolling test specimen；10-Pressure sensor；11- infrared temperature measurement apparatus；12- panel control system.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1:
As shown in Figure 1, the Sweat coolling test macro of the present invention based on oxy-acetylene platform, including coolant are adjustedDevice 1, cooling water circulating device 2, temperature sensor 3, sample stent 4, guide rail 5, heat flow transducer 6, oxyacetylene torch occurDevice 7, auto-focusing imager 8, Sweat coolling test specimen 9, pressure sensor 10, infrared temperature measurement apparatus 11, panel control system12；
Oxyacetylene torch generating device 7 is used to generate thermal-flame in the external of Sweat coolling test specimen 9；Coolant adjusts dress1 outside that Sweat coolling test specimen 9 is set is set, for regulating and controlling to be injected into the coolant of Sweat coolling test specimen 9；Cooling water circulation dress2 outsides that Sweat coolling test specimen 9 and heat flow transducer 6 are set are set, are handled for cooling；6 face oxy-acetylene of heat flow transducerFlame generating device 7, for carrying out Accurate Calibration to oxyacetylene torch；
Infrared temperature measurement apparatus 11 is used to measure the surface temperature of Sweat coolling test specimen 9；The auto-focusing imager 8 is used forAcquire image information；The surface of Sweat coolling test specimen 9 is equipped with temperature sensor 3 and pressure sensor 10；
Oxyacetylene torch generating device 7 include the first digital flowmeter 701, oxygen cylinder 702, the second digital flowmeter 703,Acetylene gas bottle 704 and oxyacetylene torch generator 705；Oxygen cylinder 702 and acetylene gas bottle 704 are connected to oxygen second by gas pipelineAlkynes flame generating means 705；The first digital flow is provided between the oxygen cylinder 702 and the oxyacetylene torch generator 705Meter 701, is provided with the second digital flowmeter 703 between the acetylene gas bottle 704 and the oxyacetylene torch generator 705；
Cooling agent regulating 1 includes cooling fluid tank 101, digital metering pump 102 and first pipe 103；Coolant passes throughThe first pipe 103 is injected into inside Sweat coolling test specimen 9, and the digital metering pump 102 is for regulating and controlling injection pressure；
Cooling water circulating device 2 includes second pipe 201, water pump 202 and cooling water tank 203, the cooling water circulation dressThe effect for setting 2 is cooled down to heat flow transducer 6 and sample stent 4；
Based on the above technical solution, it is equipped with sample stent 4 in the lower section of Sweat coolling test specimen 9, in sample stent 4Lower section guide rail 5 is installed, for moving Sweat coolling test specimen 9；
Based on the above technical solution, cooling agent regulating 1, temperature sensor 3, heat flow transducer 6, oxy-acetyleneFlame generating device 7, auto-focusing imager 8, pressure sensor 10, infrared temperature measurement apparatus 11 are wired to panelIn control system 12, for acquiring information.
The working principle of the present embodiment are as follows: when work, by requirement of experiment, install cooling water at 9 back side of Sweat coolling test specimenSweat coolling test specimen 9, is then mounted on sample stent 4 by pipeline, temperature sensor 3 and pressure sensor 10, connects coolingAgent regulating 1, temperature sensor 3 and pressure sensor 10, cooling water circulating device 2 and auto-focusing imager 8 open facePanel control system 12 switchs, and display screen is shown normally；Heat flow transducer 6 is opened to switch, it is good by 6 accurate calibration of heat flow transducerSweat coolling test specimen 9 is slowly moved into thermal-flame after waiting hot-fluids to stablize by guide rail 5 by flame hot-fluid size.Record heatThe output valve of stream, temperature sensor 3 and pressure sensor 10, infrared temperature measurement apparatus 11 and coolant flow.Pass through coolant tuneRegulating device 1 constantly regulate the flow of coolant, until 9 surface temperature of Sweat coolling test specimen is constant, off-test.Close instrumentWhen, oxyacetylene torch generating device 7 and heat flow transducer 6 are first closed, after checking that arrangement is errorless, coolant is then shut off and adjusts dressSet 1, infrared temperature measurement apparatus 11, pressure sensor 10 and temperature sensor 3, cooling water circulating device 2, panel control system 12.The experiment parameter of record is handled, the variation relation of 9 surface temperature of thermal-flame hot-fluid and Sweat coolling test specimen is obtained.
Embodiment 2:
Sweat coolling test method of the present invention based on oxy-acetylene platform, comprising the following steps:
S1: after preparing Sweat coolling test specimen 9 by test requirements document, first pipe is installed at 9 back side of Sweat coolling test specimen103, second pipe 201, temperature sensor 3 and pressure sensor 10；
S2: Sweat coolling test specimen 9 is mounted on sample stent 4, connect cooling agent regulating 1, temperature sensor 3,Pressure sensor 10, cooling water circulating device 2 and auto-focusing imager 8；
S3: opening the switch of panel control system 12, until display screen is normally shown；Open heat flow transducer 6 and oxygenThe switch of acetylene torch generating device 7 passes through the good flame hot-fluid size of 6 accurate calibration of heat flow transducer；It, will after equal hot-fluids are stablizedTest specimen 8 is slowly moved into thermal-flame along by guide rail 5；9 surface of Sweat coolling test specimen is measured by infrared temperature measurement apparatus 11Temperature；
S4: record heat flow transducer 6, temperature sensor 3 and pressure sensor 10, infrared temperature measurement apparatus 11 and coolant flowThe output valve of amount；
S5: constantly regulate the flow of coolant by cooling agent regulating 1, permanent to 9 surface temperature of Sweat coolling test specimenPeriodically, off-test；When closing instrument, oxyacetylene torch generating device 7 and heat flow transducer 6 are first closed first, are checked and are arrangedAfter errorless, cooling agent regulating 1, cooling water circulating device 2, temperature sensor 3, pressure sensor 10, infrared survey are turned offWarm device 11, panel control system 12；
S6: handling the experiment parameter recorded in step S5, obtains thermal-flame hot-fluid and Sweat coolling test specimen 9Surface temperature variation relation.
Fig. 2 is a measurement result of the present embodiment, when hot-fluid is 1.9MW/m2, when coolant flow is 0.1g/s, hairThe surface temperature of the cooling test specimen 9 of sweat tends to be constant, at 200 DEG C or so；After stopping injecting coolant, 9 table of Sweat coolling test specimenFace temperature rises rapidly；It is then turned off flame, the surface temperature decline of Sweat coolling test specimen 9.
Fig. 3 is another measurement result of the present embodiment, when hot-fluid is adjusted to 2.2MW/m2, coolant flow is adjusted toWhen 0.16g/s, the surface temperature of Sweat coolling test specimen 9 is in equilibrium state, is 260 DEG C or so；After closing flame, Sweat coollingThe surface temperature of test specimen 9 declines.
Such as above-described embodiment, the present invention can adjust hot-fluid by adjusting flame size, adjust digital metering pump 102The flow for adjusting coolant, to control the surface temperature of Sweat coolling test specimen 9；Under constant hot-fluid environment, it can will send outThe surface temperature of the cooling test specimen 9 of sweat is reduced in acceptable range, is solved the problems of the prior art, is compensated for existing skillCarry out the blank of the Sweat coolling test platform of accurate calibration in art to flame based on oxy-acetylene platform.Sweating of the present inventionCooling test platform, can test the surface temperature of different materials Sweat coolling test specimen 9 with the variation of hot-fluid and coolant flowRelationship facilitates experimental teaching and scientific research.
The present invention is not limited to described embodiment, without departing from the principles and spirit of the present invention, to thisVariation, modification, replacement and the deformation that embodiment carries out still fall within protection scope of the present invention.