CN117147622A - Hydrogen leakage diffusion combustion simulation experiment device - Google Patents
Hydrogen leakage diffusion combustion simulation experiment device Download PDFInfo
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- CN117147622A CN117147622A CN202311106726.9A CN202311106726A CN117147622A CN 117147622 A CN117147622 A CN 117147622A CN 202311106726 A CN202311106726 A CN 202311106726A CN 117147622 A CN117147622 A CN 117147622A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 182
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 182
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- 238000009792 diffusion process Methods 0.000 title claims abstract description 40
- 238000004088 simulation Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 105
- 238000002156 mixing Methods 0.000 claims abstract description 42
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 238000012546 transfer Methods 0.000 claims description 16
- 150000002431 hydrogen Chemical class 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 238000004154 testing of material Methods 0.000 abstract description 2
- 239000002737 fuel gas Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 17
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 10
- 238000005192 partition Methods 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000003380 propellant Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 2
- RHUYHJGZWVXEHW-UHFFFAOYSA-N 1,1-Dimethyhydrazine Chemical compound CN(C)N RHUYHJGZWVXEHW-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
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Abstract
The invention relates to the technical field of material testing, in particular to a hydrogen leakage diffusion combustion simulation experiment device, which comprises a hydrogen source, a hydrogen conveying pipeline, a combustion-supporting gas source and a combustion-supporting gas conveying pipeline, wherein the hydrogen conveying pipeline is provided with a hydrogen inlet and a hydrogen outlet, the hydrogen inlet is connected with the hydrogen source, the combustion-supporting gas conveying pipeline is provided with a combustion-supporting gas inlet and a combustion-supporting gas outlet, the combustion-supporting gas inlet is connected with the combustion-supporting gas source, the experiment device also comprises a mixing cavity communicated with the hydrogen conveying pipeline and the combustion-supporting gas conveying pipeline, the hydrogen outlet and/or the combustion-supporting gas outlet are connected to the mixing cavity, the combustion-supporting gas conveying pipeline and the hydrogen conveying pipeline are communicated to the mixing cavity, and the hydrogen is discharged after being mixed with the combustion-supporting gas, so that the mixed gas can be ignited, and the experiment device is suitable for carrying out mixed gas diffusion combustion experiments containing hydrogen.
Description
Technical Field
The invention relates to the technical field of material testing, in particular to a hydrogen leakage diffusion combustion simulation experiment device.
Background
The liquid rocket is a carrier using liquid propellant, is common in various scenes such as spacecraft launching, attitude correction and control, orbit transfer and the like, common oxidants comprise liquid oxygen, dinitrogen tetroxide and the like, and common combustion agents comprise liquid hydrogen, unsymmetrical dimethylhydrazine, coal oil and the like, wherein the liquid hydrogen liquid oxygen propellant has the advantages of higher than impulse, safety, no toxicity, environment friendliness of products and the like, but the defects are also obvious, the liquid hydrogen needs to be temporarily poured, stored at low temperature and is difficult to prepare and transport, so the liquid hydrogen needs to be stored in an aerospace launching field for filling the liquid rocket propellant.
The boiling point of liquid hydrogen is-252 ℃, once the liquid hydrogen leaks from the storage device, the liquid hydrogen can quickly change phase, the liquid hydrogen is converted into gaseous hydrogen, the gaseous hydrogen has a diffusion speed similar to that of gasoline, and once the proportion of the gaseous hydrogen in the air reaches 4-74.2%, the combustion or explosion is easy to occur once the open fire or the energy is released (the minimum ignition energy is 0.02 mJ), so that the combustion phenomenon possibly occurring due to the hydrogen leakage is necessary to be studied in order to ensure the safety of a space launching field.
Among the prior art, the application publication number is CN111812145A, the application publication day is the China invention patent application on the day of 2020, 10 months and 23 days discloses a low temperature liquid hydrogen jet flame research experimental apparatus, including high-pressure hydrogen cylinder group, high-pressure hydrogen cylinder group constitutes the hydrogen source, be connected with the hydrogen supply tube on the high-pressure hydrogen cylinder group, be equipped with relief valve and the flowmeter of monitoring hydrogen flow on the hydrogen supply tube, the main supply tube of hydrogen supply tube connection, the main supply tube is connected with ultralow temperature heat transfer system, ultralow temperature heat transfer system constitutes the cooler, ultralow temperature heat transfer system is connected with liquid hydrogen conveyer pipe, the hydrogen supply tube, main supply tube constitutes hydrogen conveying pipeline, liquid hydrogen conveyer pipe end is equipped with the nozzle, nozzle department is equipped with the ignition electrode, the ignition electrode constitutes the some firearm, the ignition electrode is used for low temperature liquid hydrogen, data acquisition system detects parameters such as the temperature of jet flame, heat radiation, the burning image and flame form of high-speed camera shooting hydrogen.
The experimental device is used for carrying out simulation experiments on the diffusion combustion of pure hydrogen leaked to the outside air, in the practical application scene, the situation of pure hydrogen leakage exists, the situation of leakage of mixed gas after mixing hydrogen and combustion-supporting gas exists, the diffusion characteristics of the mixed gas and the pure hydrogen in the air are different, the diffusion combustion state after the mixed gas leakage needs to be researched in addition, the existing experimental device is only suitable for the simulation experiments on the pure hydrogen leakage, and the experimental device cannot be suitable for the simulation experiments on the mixed gas leakage containing hydrogen.
Disclosure of Invention
The invention aims to provide a hydrogen leakage diffusion combustion simulation experiment device, which aims to solve the problem that the existing experiment device cannot be suitable for performing simulation experiments on mixed gas leakage containing hydrogen.
The technical scheme of the hydrogen leakage diffusion combustion simulation experiment device is as follows:
the utility model provides a hydrogen leakage diffusion burning simulation experiment device, this experiment device includes hydrogen source and hydrogen transfer line, hydrogen transfer line has hydrogen import and hydrogen export, the hydrogen import links to each other with the hydrogen source, this experiment device still includes combustion-supporting air source and combustion-supporting gas transfer line, combustion-supporting gas transfer line has combustion-supporting gas import and combustion-supporting gas export, combustion-supporting gas import links to each other with the combustion-supporting air source, this experiment device still includes the mixing chamber that all communicates with hydrogen transfer line and combustion-supporting gas transfer line, hydrogen export and/or combustion-supporting gas export are connected to mixing chamber.
The beneficial effects are that: the combustion-supporting gas source and the combustion-supporting gas conveying pipeline are matched with the hydrogen source and the hydrogen conveying pipeline to realize the supply of hydrogen and combustion-supporting gas, and meanwhile, the combustion-supporting gas conveying pipeline and the hydrogen conveying pipeline are communicated to the mixing cavity, so that the hydrogen and the combustion-supporting gas are discharged after being mixed, and then the mixed gas can be ignited, so that the device is suitable for carrying out a mixed gas diffusion combustion experiment containing hydrogen.
Further, the experimental device also comprises a nozzle, the mixing cavity is arranged in the nozzle, and the hydrogen outlet and the combustion-supporting gas outlet are connected to the nozzle.
The beneficial effects are that: the fuel gas and the hydrogen are directly mixed in the nozzle, so that the length of a conveying path of the mixed gas is shortened, and the safety is improved.
Further, the nozzle is a mixer, the mixer comprises a shell, the mixing cavity is arranged in the shell and is provided with a mixed gas outlet, a fan is arranged in the mixing cavity and is used for rotating under the action of air flow in the mixing cavity.
The beneficial effects are that: the fan is driven to rotate by the air flow of the mixed gas, the gas is stirred, the air flow is convenient to mix fully, and the gas mixing efficiency is improved.
Further, the combustion-supporting air source is an air source.
The beneficial effects are that: the air is used as the fuel gas, the oxygen amount can be controlled by controlling the air amount, and the safety is improved while the combustion experiment is realized.
Further, the air source is a gas cylinder filled with compressed air.
The beneficial effects are that: the gas cylinder is used as a gas source, so that the gas cylinder is convenient to disassemble and assemble and convenient to move.
Further, the experimental device also comprises a cooler, wherein the cooler is provided with a part correspondingly matched with the hydrogen conveying pipeline so that the cooler can cool the hydrogen.
The beneficial effects are that: the cooler is used for cooling the hydrogen, so that the low-temperature hydrogen leakage scene can be simulated.
Further, the cooler is provided with a part correspondingly matched with the combustion-supporting gas conveying pipeline so that the cooler can cool the combustion-supporting gas.
The beneficial effects are that: the auxiliary fuel gas is cooled by the cooler, so that the temperature of the mixed auxiliary fuel gas and hydrogen is ensured.
Further, a drying device is arranged on the combustion-supporting gas conveying pipeline at the downstream of the cooler.
The beneficial effects are that: and the moisture in the air is removed by using the drying equipment, so that the influence of the moisture in the air on the experimental result is avoided.
Further, a hydrogen concentration sensor is provided at the hydrogen source and/or at the nozzle.
The beneficial effects are that: hydrogen leakage may be perceived to facilitate the adoption of corresponding safety measures.
Further, the hydrogen conveying pipeline and the combustion-supporting gas conveying pipeline are provided with flow regulating valves.
The beneficial effects are that: the mixed gas with different concentration ratios is convenient to realize, and the simulation of stable premixed combustion of hydrogen and air is realized.
Drawings
FIG. 1 is a schematic structural diagram of an experimental apparatus for simulating hydrogen leakage diffusion combustion according to example 1 of the present invention;
FIG. 2 is a schematic view of the nozzle of FIG. 1;
FIG. 3 is a front view of the nozzle of FIG. 2;
FIG. 4 is a left side view of the nozzle of FIG. 2;
FIG. 5 is a right side view of the nozzle of FIG. 2;
FIG. 6 is a schematic view of the internal structure of the nozzle of FIG. 2;
FIG. 7 is a schematic view of the separator of FIG. 6;
FIG. 8 is a schematic diagram of the gas flow direction of the nozzle of FIG. 6.
In the figure: 1. a compressed hydrogen cylinder; 2. a first pressure reducing valve; 3. a first flow regulating valve; 4. a first flowmeter; 5. a first pressure gauge; 6. a first temperature sensor; 7. a second pressure gauge; 8. a second temperature sensor; 9. a nozzle; 10. an igniter; 11. a third temperature sensor; 12. a compressed air bottle; 13. a second pressure reducing valve; 14. a second flow regulating valve; 15. a second flowmeter; 16. a third pressure gauge; 17. a fourth temperature sensor; 18. a cold trap; 19. a drying device; 20. a fourth pressure gauge; 21. a fifth temperature sensor; 22. a first hydrogen concentration sensor; 23. a second hydrogen concentration sensor; 91. a first barrel; 911. a mixed gas outlet; 912. a mixing chamber; 92. a second barrel; 921. a buffer chamber; 93. a hydrogen pipe; 94. an air duct; 95. a fan; 96. a partition plate; 961. a central through hole; 962. the communication hole.
Detailed Description
Example 1 of the experimental apparatus for hydrogen leakage diffusion combustion simulation of the present invention:
in the embodiment, the combustion-supporting gas source and the combustion-supporting gas conveying pipeline are arranged to be matched with the hydrogen source and the hydrogen conveying pipeline to realize the supply of hydrogen and combustion-supporting gas, meanwhile, the combustion-supporting gas conveying pipeline is communicated with the hydrogen conveying pipeline, the mixed cavity on the hydrogen conveying pipeline is used for enabling the hydrogen and the combustion-supporting gas to be mixed and then sprayed out from the nozzle, and then the mixed gas can be ignited, so that the device is suitable for carrying out a mixed gas diffusion combustion experiment containing hydrogen.
As shown in fig. 1, the hydrogen leakage diffusion combustion simulation experiment device comprises a hydrogen source, a hydrogen conveying pipeline, an air source, an air conveying pipeline and a nozzle 9. The hydrogen source is a compressed hydrogen bottle 1, and the air source is a compressed air bottle 12. The hydrogen conveying pipeline and the air conveying pipeline are both connected with the nozzles, hydrogen is mixed with air at the nozzles 9 through the hydrogen conveying pipeline and sprayed out, and the mixed gas is ignited through the igniters 10 at the nozzles 9 to simulate the combustion phenomenon when the mixed gas containing hydrogen leaks.
The hydrogen conveying pipeline is provided with a hydrogen inlet and a hydrogen outlet, the hydrogen inlet is connected with the air tap of the compressed hydrogen bottle 1, and the nozzle 9 is arranged at the hydrogen outlet. The hydrogen delivery pipeline is provided with a first pressure reducing valve 2, a first flow regulating valve 3, a first flowmeter 4, a first pressure measuring meter 5, a first temperature sensor 6, a second pressure measuring meter 7 and a second temperature sensor 8 from upstream to downstream.
The air conveying pipeline forms a fuel gas conveying pipeline, the air forms fuel gas, the air source forms a fuel gas source, the fuel gas conveying pipeline is provided with a fuel gas inlet and a fuel gas outlet, the fuel gas inlet is connected with an air tap of the compressed air bottle 12, and the fuel gas outlet is connected with a nozzle 9 of the hydrogen conveying pipeline. The secondary fuel gas delivery pipeline is provided with a second pressure reducing valve 13, a second flow regulating valve 14, a second flowmeter 15, a third pressure measuring meter 16, a fourth temperature sensor 17, a drying device 19, a fourth pressure measuring meter 20 and a fifth temperature sensor 21 from upstream to downstream. The air is used as the fuel gas, the oxygen amount can be controlled by controlling the air amount, and the safety is improved while the combustion simulation experiment is realized.
The nozzle 9 has a mixing chamber, and the hydrogen outlet and the combustion-supporting gas outlet are both communicated with the mixing chamber for mixing the hydrogen and the air. The air and the hydrogen are directly mixed in the nozzle 9, so that the length of the transport path of the mixture can be shortened as much as possible, and the safety can be improved.
The nozzle 9 is provided with an igniter 10 and a third temperature sensor 11, the temperature sensor at the nozzle 9 is used for detecting whether ignition is successful in a hydrogen-air combustion experiment, the igniter 10 is a spark plug, after the spark plug discharges according to a preset program, the temperature sensor detects the temperature at the outlet of the nozzle 9, if the temperature rises sharply at the moment and reaches a certain threshold value, the ignition is considered to be successful, the spark plug does not work any more, and otherwise, the spark plug performs the ignition of the next round.
The experimental device further comprises a cooler, wherein the cooler is a cold trap 18, the cooler is provided with a part which is correspondingly matched with the hydrogen conveying pipeline so that the cooler can cool hydrogen, the cooler is further provided with a part which is correspondingly matched with the combustion-supporting gas conveying pipeline so that the cooler can cool the combustion-supporting gas, the cooler is used for cooling the hydrogen, and a liquid hydrogen leakage scene can be simulated. The auxiliary fuel gas is cooled by the cooler, so that the temperature of the mixed auxiliary fuel gas and hydrogen is ensured. And a drying device 19 is arranged on the fuel gas conveying pipeline at the downstream of the cooler, and moisture in the air is removed by using the drying device 19, so that the influence of the moisture in the air on experimental results is avoided.
The nozzle 9 is provided with a first hydrogen concentration sensor 22, the compressed hydrogen cylinder 1 is provided with a second hydrogen concentration sensor 23, hydrogen leakage can be sensed, the concentration of leaked hydrogen in the environment is detected, and once the hydrogen concentration exceeds the standard, a warning is given and corresponding safety treatment measures are started.
The pressure reducing valve is a manual explosion-proof pressure reducing valve. The flow regulating valve, the flowmeter, the temperature sensor, the igniter 10 and the hydrogen concentration sensor are all in signal connection with the corresponding controllers. The flow rate of the hydrogen or the air is regulated by controlling the flow regulating valve, so that hydrogen-air mixed gases with different concentrations or different hydrogen-air flames are formed.
The delivery lines for both hydrogen and air pass through the cooler and the gas is cooled to a specified temperature by the refrigerant inside the cooler, in this example to-60 ℃. The conveying pipeline from the air source to the cold trap 18 is processed by a stainless steel seamless pipeline, the pipeline between the cold trap 18 and the nozzle 9 has the same material, but the pipeline is subjected to heat insulation treatment, so that the temperature of the air is ensured not to change excessively. And a pressure gauge and a temperature sensor are respectively arranged on each conveying pipeline at the upstream and downstream of the cooler so as to grasp the change before and after cooling and adjust parameters in time.
The pressure, temperature, duration and the like of the mixed combustion of the hydrogen and the air with different volume ratios are different, the accurate proportioning of the mixed gas is realized through means such as a flowmeter, real-time data acquisition, controller control and the like, and the mixed combustion phenomenon of the hydrogen and the air under different conditions is simulated. The stable diffusion combustion process of pure hydrogen with different temperatures (low temperature or normal temperature) and different flow rates in the air can be simulated by closing the air source. The air source and the hydrogen source are opened, so that the diffusion combustion process of the mixed gas in the air can be simulated, and the universality of the experimental device is improved.
The specific structure of the nozzle 9 is shown in fig. 2-8, the nozzle 9 is a mixer, the mixer comprises a shell, the shell comprises a cylinder body and a baffle plate 96 arranged in the cylinder body, the cylinder body comprises a first cylinder 91 and a second cylinder 92 which are arranged left and right, the first cylinder 91 and the second cylinder 92 are coaxially arranged, and the axis extends along the left and right direction. The second tube 92 is used for connecting an air pipe 94 and a hydrogen pipe 93, the air pipe 94 is used for connecting corresponding air conveying pipelines, and the hydrogen pipe 93 is used for connecting corresponding hydrogen conveying pipelines. The hydrogen forms the fuel gas and the air forms the auxiliary fuel gas. The left end opening of the first cylinder 91 constitutes a cylinder mouth of the cylinder body, and the cylinder mouth constitutes a mixture outlet 911 so that the fuel gas and the combustion-supporting gas flow out from the mixture outlet 911 after being mixed by the mixer.
The first cylinder 91 is penetrated from left to right, and the left end opening is smaller than the right end opening, and the first cylinder 91 comprises a small-diameter section, a conical section and a large-diameter section which are sequentially arranged from left to right. The second barrel 92 has a left end barrel port and a right end barrel bottom. The right end of the large diameter section of the first cylinder 91 is provided with an internal thread, and the left end of the second cylinder 92 is provided with an external thread, so that the first cylinder 91 and the second cylinder 92 are in threaded connection, and the threaded connection is subjected to sealing treatment. The right end barrel bottom of the second barrel 92 constitutes the barrel bottom of the barrel, the baffle 96 sets up in the left end barrel mouth department of second barrel 92, baffle 96 has divided into two left and right sides chambeies with the barrel inner chamber, first barrel 91 encloses into the mixing chamber 912 of leaning on the left side with baffle 96, the second barrel 92 encloses into the buffering chamber 921 of leaning on the right side with baffle 96, baffle 96 constitutes the partition portion that sets up between buffering chamber 921 and mixing chamber 912, the partition portion separates the casing inner chamber into buffering chamber 921 and mixing chamber 912, the opposite both sides wall of baffle 96 constitutes the one side chamber wall of mixing chamber 912 and one side chamber wall of buffering chamber 921 respectively.
The partition plate 96 is provided with a central through hole 961 and a plurality of communication holes 962, the central through hole 961 being provided at a central position of the partition plate 96, and the communication holes 962 being uniformly distributed around the central through hole 961. The center of the right end barrel bottom of the second barrel 92 is provided with a through hole for the hydrogen pipeline 93 to pass through, the hydrogen pipeline 93 passes through the right end barrel bottom of the second barrel 92 and the buffer cavity 921 to be connected with the center through hole 961 so that hydrogen can directly enter the mixing cavity 912, and the center through hole 961 forms a first pipeline interface. The right end barrel bottom of the second barrel 92 is provided with a second pipeline interface on one side passing through the hole, the second pipeline interface is communicated with the buffer cavity 921, the air pipeline 94 is connected with the second pipeline interface, the orientation of the first pipeline interface is the same with that of the second pipeline interface, the hydrogen pipeline 93 and the air pipeline 94 are connected at the same end of the shell, and the connection is convenient and the reduction of the pipeline occupation space is facilitated. The central through hole 961 forms a gas inlet which is arranged on the shell and is communicated with the mixing cavity 912, the gas inlet is communicated with a gas pipeline, the second pipeline interface forms a combustion-supporting gas inlet which is arranged on the shell and is communicated with the mixing cavity 912, and the combustion-supporting gas inlet is communicated with the mixing cavity 912 through the buffer cavity 921 and the communication hole 962. The air enters the buffer chamber 921 through the communication holes 962, enters the mixing chamber 912, mixes with the hydrogen gas in the mixing chamber 912, and flows out from the mixture outlet 911. The buffer chamber 921 allows the corresponding gas to enter the mixing chamber 912 from each communication hole 962, and the gas is dispersed, thereby facilitating uniform mixing.
The fan 95 is arranged in the mixing chamber 912, and the fan 95 can rotate under the action of air flow in the mixing chamber 912 to stir the air in the mixing chamber 912, so that the mixing efficiency is improved. The fan 95 is arranged on the small diameter section of the first cylinder 91, the opening of the left end of the small diameter section of the first cylinder 91 is a mixed gas outlet 911, and the fan 95 corresponds to the mixed gas outlet 911 along the extending direction of the central line of the mixing cavity 912, so that the mixer can spray conveniently. Center holes 961 and center lines of the communication holes 962 extend in the left-right direction, the center holes 961 correspond to the fans 95 in the left-right direction, and the center holes 961 face the fans 95, so that air flows against the fans 95, the air flow is facilitated to drive the fans 95 to rotate, and stirring of the air by the fans 95 is facilitated.
The inner diameter and the outer diameter of the small diameter section of the first cylinder 91 are smaller than those of the large diameter section, the conical section is used as the transition from the large diameter section to the small diameter section, the conical section and the small diameter section form a necking structure of the first cylinder 91, so that the part of the mixing cavity 912, which is close to the mixed gas outlet 911, is a necking part, the part of the inner cavity of the first cylinder 91, which corresponds to the small diameter section, forms a cylindrical cavity part, the part, which corresponds to the conical section, forms a conical cavity part, the necking part comprises a conical cavity part and a cylindrical cavity part, the mixed gas outlet 911 is formed by a left opening of the cylindrical cavity part, the fan 95 is arranged in the cylindrical cavity part, the gas flow speed can be improved by utilizing the necking part, the fan 95 is accelerated to rotate, and meanwhile, the cylindrical cavity part is utilized to restrain the gas flow, and the gas flow ejection direction is ensured. The communication hole 962 is a tapered hole having a diameter gradually decreasing in the air flow direction to increase the air flow rate.
After the air enters the buffer cavity 921 and is sprayed out through each communication hole 962, the air flow of each communication hole 962 forms an accompanying flow of the hydrogen flow surrounding the central through hole 961, and the accompanying flow is matched with a fan to stir, so that the hydrogen diffusion is facilitated, the stability of the mixed gas combustion is improved, and the effective and stable simulation of the diffusion combustion after the liquid hydrogen leakage is facilitated.
Example 2 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a different form of arrangement of the combustion-supporting gas delivery line from embodiment 1, which is different from embodiment 1 in that the combustion-supporting gas delivery line in embodiment 1 is connected to the nozzle of the hydrogen delivery line. In this embodiment, the combustion-supporting gas delivery line is connected to the hydrogen delivery line.
Example 3 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a different arrangement form from embodiment 1, and the difference between this embodiment and embodiment 1 is that the nozzle in embodiment 1 includes a cylinder, a partition board is disposed in the cylinder, the partition board and the bottom of the cylinder enclose a mixing chamber, and an air injection hole is disposed on the partition board. In this embodiment, the nozzle is a cylinder, and the inner cavity of the cylinder forms a mixing cavity.
Example 4 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a different arrangement of the combustion-supporting air source from embodiment 1, which is different from embodiment 1 in that the combustion-supporting air source in embodiment 1 is an air source. In this embodiment, the combustion-supporting gas source is an oxygen source.
Example 5 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides an air source arrangement form different from embodiment 1, and the present embodiment is different from embodiment 1 in that the air source in embodiment 1 is a gas cylinder filled with compressed air. In this embodiment, the air source is an air compressor.
Example 6 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
this embodiment provides a different form of cooler arrangement from embodiment 1, which differs from embodiment 1 in that the simulation experiment apparatus in embodiment 1 further includes a cooler. In this embodiment, a cooler is not provided.
Example 7 of the experimental device for simulating hydrogen leakage diffusion combustion in the present invention:
the present embodiment provides a cooler arrangement different from that of embodiment 1 in that the cooler in embodiment 1 further has a portion corresponding to the combustion-supporting gas delivery line to allow the cooler to cool the combustion-supporting gas. In this embodiment, the cooler has only a portion for cooling the hydrogen gas, and does not cool the air.
Example 8 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a different arrangement form of the drying apparatus from embodiment 1, which is different from embodiment 1 in that the drying apparatus is provided downstream of the cooler on the combustion air delivery line in embodiment 1. In this embodiment, however, no drying device is provided.
Example 9 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a hydrogen concentration sensor arrangement form different from embodiment 1 in that hydrogen concentration sensors are provided at the hydrogen source and at the nozzle in embodiment 1. In this embodiment, the hydrogen concentration sensor is not provided.
Example 10 of a hydrogen leakage diffusion combustion simulation experiment apparatus in the present invention:
the present embodiment provides a flow rate regulating valve arrangement different from that of embodiment 1, and the present embodiment is different from embodiment 1 in that the hydrogen gas delivery pipe and the combustion-supporting gas delivery pipe in embodiment 1 are both provided with flow rate regulating valves. In this embodiment, the flow rate regulating valve is provided only in the hydrogen delivery pipe.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a hydrogen leakage diffusion burning simulation experiment device, this experiment device includes hydrogen source and hydrogen transfer line, hydrogen transfer line has hydrogen import and hydrogen export, hydrogen import links to each other with the hydrogen source, characterized by, this experiment device still includes combustion-supporting air source and combustion-supporting gas transfer line, combustion-supporting gas transfer line has combustion-supporting gas import and combustion-supporting gas export, combustion-supporting gas import links to each other with combustion-supporting air source, this experiment device still includes the mixing chamber that all communicates with hydrogen transfer line and combustion-supporting gas transfer line, hydrogen export and/or combustion-supporting gas export are connected to mixing chamber.
2. A hydrogen leakage diffusion combustion simulation experiment apparatus according to claim 1, further comprising a nozzle, wherein the mixing chamber is disposed in the nozzle, and wherein the hydrogen outlet and the combustion-supporting gas outlet are connected to the nozzle.
3. The experimental device for simulating hydrogen leakage diffusion combustion according to claim 2, wherein the nozzle is a mixer, the mixer comprises a housing, the mixing chamber is provided with a mixed gas outlet, and a fan is provided in the mixing chamber and is used for rotating under the action of air flow in the mixing chamber.
4. A hydrogen leakage diffusion combustion simulation experiment device according to claim 1, 2 or 3, wherein the combustion-supporting gas source is an air source.
5. The experimental apparatus for simulating hydrogen leakage diffusion combustion according to claim 4, wherein the air source is a gas cylinder filled with compressed air.
6. A hydrogen leakage diffusion combustion simulation experiment apparatus according to claim 1, 2 or 3, further comprising a cooler having a portion corresponding to the hydrogen delivery line so that the cooler cools the hydrogen.
7. A hydrogen leakage diffusion combustion simulation experiment apparatus according to claim 6, wherein the cooler further has a portion corresponding to the combustion-supporting gas delivery line so that the cooler cools the combustion-supporting gas.
8. The experimental apparatus for simulating hydrogen leakage diffusion combustion according to claim 7, wherein the combustion supporting gas delivery pipe is provided with a drying device at the downstream of the cooler.
9. A hydrogen leakage diffusion combustion simulation experiment device according to claim 1, 2 or 3, wherein a hydrogen concentration sensor is provided at the hydrogen source and/or at the nozzle.
10. The experimental device for simulating hydrogen leakage diffusion combustion according to claim 1, 2 or 3, wherein flow regulating valves are arranged on the hydrogen conveying pipeline and the combustion-supporting gas conveying pipeline.
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| CN202311106726.9A CN117147622A (en) | 2023-08-30 | 2023-08-30 | Hydrogen leakage diffusion combustion simulation experiment device |
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| CN202311106726.9A CN117147622A (en) | 2023-08-30 | 2023-08-30 | Hydrogen leakage diffusion combustion simulation experiment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033034A (en) * | 2024-04-15 | 2024-05-14 | 合肥工业大学 | Liquid hydrogen jet combustion test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033034A (en) * | 2024-04-15 | 2024-05-14 | 合肥工业大学 | Liquid hydrogen jet combustion test system |
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