CN218412510U - Accurate measuring device for ignition energy of energetic fuel - Google Patents
Accurate measuring device for ignition energy of energetic fuel Download PDFInfo
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- CN218412510U CN218412510U CN202222264233.5U CN202222264233U CN218412510U CN 218412510 U CN218412510 U CN 218412510U CN 202222264233 U CN202222264233 U CN 202222264233U CN 218412510 U CN218412510 U CN 218412510U
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Abstract
The utility model relates to a fuel ignition can experimental technique, aims at providing one kind and contains accurate measuring device of ability fuel ignition energy. The heating wire ignition system of the device comprises a power supply module and a heating wire embedded in an energy-containing fuel pressing block, wherein a direct-current power supply and a power monitoring module are arranged in the power supply module; the direct current power supply is connected with two ends of the heating wire through a lead, and the power monitoring module is connected to the two ends of the heating wire and used for controlling the heating wire to heat at a set power; the camera of the high-speed camera is aligned with the energy-containing fuel pressing block, and the synchronous controller is respectively connected with the power monitoring module and the high-speed camera through signal lines and used for synchronizing the time when the electric heating wire starts to heat and the time when the high-speed camera starts to record. The device's simple structure, practical convenient, can accurate measurement ignition time and carry out accurate control to heating wire operating power, provide the condition for obtaining more accurate measuring result.
Description
Technical Field
The utility model relates to a fuel ignition can experimental technique, aims at providing one kind and contains accurate measuring device of ability fuel ignition energy.
Background
The energy-containing fuel has very high volume heat value and mass heat value, is widely applied to engines of spacecrafts, weapons and power devices and explosives and is a main energy-containing component in commonly used solid propellants and explosives, plays an irreplaceable role in improving the energy density of the propellants or the explosives, and directly influences the energy release process and the release degree of the solid propellants or the explosives. The combustion of the fuel is an important way and a mode for releasing the energy, so the ignition combustion characteristic of the energy-containing fuel is directly related to the performance of a propellant or an explosive, and even influences the navigational speed, the navigational range or the power of an explosive weapon of a spacecraft. The combustion process of the fuel is ignition firstly, the ignition of the fuel is a precondition and a prerequisite for combustion, and the main indexes for generally measuring the ignition characteristics of the energy-containing fuel are ignition delay time, ignition energy, ignition temperature and the like, and the indexes have important influence on the selection of the energy-containing fuel, the formulation design of a solid propellant or explosive, energy release performance and the like.
At present, ignition delay time and ignition temperature are easy to measure, the precision is high, the measuring method is more, and the ignition delay time of the energy-containing fuel can be conveniently measured and obtained by adopting a spectroscopic method or a high-speed camera shooting method; the ignition temperature of the energy-containing fuel can be conveniently measured by adopting a radiation pyrometer, an infrared thermal imager, a thermocouple, a thermal balance and the like. However, quantitative determination of ignition energy of energetic fuels is difficult, and there is no related instrument and equipment for directly measuring ignition energy and a corresponding calculation method which are relatively accurate.
In addition, there are many devices and methods for measuring ignition performance of energy-containing fuel, such as laser ignition method, shock tube, flat flame burner, horizontal or vertical tube furnace, xenon lamp condensation ignition, plasma ignition, etc., but these devices or methods can only qualitatively observe or detect ignition combustion performance of energy-containing fuel, and are generally used in comparative experiments, such as whether fuel can be effectively ignited, the speed of ignition time, the level of combustion intensity, the evolution of flame morphology and the process of ignition combustion, or with the aid of a measuring instrument, combustion characteristic parameters such as ignition temperature, combustion time, etc. can be obtained, but generally, relatively accurate ignition energy cannot be obtained. Methods such as laser ignition, xenon lamp condensation ignition, plasma ignition and the like are all large (high) energy ignition, i.e. much more excess energy is adopted, so that the magnitude of ignition energy which is really used for energy-containing fuel and is absorbed by the energy-containing fuel cannot be known; the methods of flat flame burner, horizontal or vertical tube furnace, etc. provide a relatively high ambient temperature to ignite the sample, and the energy consumed by the high temperature environment is completely different from the energy actually required by the energetic fuel sample (the former is much larger than the latter), so that the ignition energy actually required by the energetic fuel cannot be known.
In summary, a relatively accurate measurement technology for ignition energy of the energy-containing fuel is a problem which needs to be solved urgently at present, and has important practical significance for accurate, efficient and low-cost application of the energy-containing fuel and full play of energy effects of the energy-containing fuel.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome not enough among the prior art, provide an contain accurate measuring device of energy fuel ignition energy.
For solving the technical problem, the utility model discloses a solution is:
the device is characterized by comprising an energy-containing fuel pressing block, a heating wire ignition system, a high-speed camera and a synchronous controller; wherein, the first and the second end of the pipe are connected with each other,
the heating wire ignition system comprises a power module and a heating wire embedded in the energy-containing fuel pressing block, and a direct-current power supply and a power monitoring module are arranged in the power module; the direct current power supply is connected with two ends of the heating wire through a lead, and the power monitoring module is connected to the two ends of the heating wire and used for controlling the heating wire to heat at set power;
the camera of the high-speed camera is aligned with the energy-containing fuel pressing block, and the synchronous controller is respectively connected with the power monitoring module and the high-speed camera through signal lines and used for synchronizing the time when the electric heating wire starts to heat and the time when the high-speed camera starts to record.
As the preferred scheme of the utility model, the heating wire is a linear type heating wire or a spiral type heating wire made of solid alloy material.
As the preferred scheme of the utility model, the heating section of heating wire runs through to bury underground in containing can fuel briquetting, and keeps unanimous with containing can fuel briquetting's syntropy cross-section width.
As the preferred scheme of the utility model, the energy-containing fuel pressing block is molded by a pressing die, and the shape of the energy-containing fuel pressing block is cubic; the section of the pressing block is square, the side length is 5-8 mm, and the height is 5-10 mm; the linear electric heating wire with the diameter of 0.5mm is positioned on the central axis of the energy-containing fuel pressing block and is 1mm away from the surface of the pressing block, and the length of the heating section is consistent with the width of the section of the pressing block.
As the preferred scheme of the utility model, the heating section both ends of heating wire are equipped with binding post respectively.
Description of the technical principle:
the utility model discloses a die pressing method is pressed the energy-containing fuel into blocks, buries a heating wire wherein in advance in the shaping manufacture process, prepares the energy-containing fuel briquetting of electrified wire like this. During experimental measurement, the electric heating wire in the pressing block is connected with a direct current power supply through an electric wire, the power supply is started, the output voltage is rapidly increased, when current passes through the electric heating wire with certain resistance, the current does work to consume electric energy, heat is generated, therefore, the electric heating wire in the pressing block can be heated and heated immediately after being electrified, and when the electric heating wire reaches certain heat dissipation capacity and meets the energy requirement of ignition of energy-containing fuel, the pressing block is ignited and continuously burns. Meanwhile, as the temperature rises quickly after the energy-containing fuel is ignited and combusted, the heating wire can be quickly fused and is not electrified any more, and the subsequent combustion process of the energy-containing fuel is not influenced. When the power monitoring module is used for switching on the direct-current power supply, the synchronous controller can automatically turn on the high-speed camera to carry out whole-course shooting on the ignition and combustion process, and whether the energetic fuel is combusted in a self-sustaining mode after being ignited is judged according to the camera record, so that whether ignition is successful and the ignition time is determined.
Because the heating wire is completely buried in the energy-containing fuel pressing block, the heat emitted by the heating wire during working can be considered to be completely transferred to the fuel. Therefore, after confirming that the ignition of the briquette is successful, the ignition timing is determined according to the image data recorded by the high-speed camera, and the ignition power integrated value (namely, the ignition energy) of the energy-containing fuel can be obtained by calculating the power integrated value of the heating wire in the ignition time length after the electrification.
Compared with the prior art, the utility model has the technical effects that:
(1) The utility model discloses a scheme at the pre-buried heating wire of energy-containing fuel forming process can utilize the fuel effect of heating wire electric current, turns into heat energy with the electric energy. During the experiment, the device can be used for measuring the electrifying time and the ignition time of the energy-containing fuel briquetting so as to obtain the ignition time; and further, the power monitoring module is used for controlling the heating wire to work at a set power value, so that the ignition energy of the energy-containing fuel can be calculated and obtained. The device simple structure, convenient operation can accurate measurement ignition time and carry out accurate control to heating wire operating power, provide the condition for obtaining more accurate measuring result.
(2) The utility model discloses a device does not receive the restriction that contains can the fuel kind, as long as adjust the voltage or the electric current through the heating wire, makes the ignition performance phase-match of its operating power and fuel, finally can both ignite successfully. On the basis of the energy, the ignition energy of the energy-containing fuel can be obtained through accurate and simple measurement and calculation. Therefore, the device can greatly widen the range of the energy-containing fuel which can be tested and calculated by experiments.
(3) The pre-buried heating wire is used for ignition measurement of the energy-containing fuel, and the influence on the ignition and combustion process of the sample is small. When the energy-containing fuel is ignited, the temperature rises due to the energy released by the fuel, and the thin heating wire can be quickly melted and disconnected (blown) at high temperature, so that the heating wire is not electrified to generate heat and is melted and disappeared, and the subsequent combustion process of the energy-containing fuel cannot be influenced.
Drawings
FIG. 1 shows an accurate ignition energy measuring device for an energy-containing fuel briquette.
Fig. 2 is a view in the direction a of fig. 1.
Reference numerals are as follows: the device comprises an energy-containing fuel pressing block 1, an electric heating wire 2, a lead 3, a power module 4, a high-speed camera 5 and a synchronous controller 6.
Detailed Description
The precise measuring device for the ignition energy of the energy-containing fuel of the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the device for accurately measuring the ignition energy of the energy-containing fuel comprises an energy-containing fuel pressing block 1, a heating wire ignition system, a high-speed camera 5 and a synchronous controller 6; the heating wire ignition system comprises a power module 4 and a heating wire 2 pre-embedded in the energy-containing fuel pressing block, wherein a direct-current power supply and a power monitoring module are arranged in the power module 4; wherein, the direct current power supply is connected with two ends of the heating wire 2 through a lead 3, and the power monitoring module is connected to two ends of the heating wire 2 and is used for controlling the heating wire to heat with set power; the camera of the high-speed camera 5 is aligned with the energy-containing fuel pressing block 1, and the synchronous controller 6 is respectively connected with the power monitoring module and the high-speed camera 5 through signal lines and used for synchronizing the time when the heating wire 2 starts to heat and the time when the high-speed camera 5 starts to record.
The utility model discloses in, power monitoring module is used for monitoring heating wire 2's operating voltage, electric current, carries out the power calculation based on monitoring data to adjust DC power supply output's DC voltage or electric current according to the calculation result is automatic in succession, make the operating power of final heating wire controlled the requirement that accords with the default. Power monitoring module belongs to the commercial ripe product, and it is optional to have a great deal of model product, and certainly also can build by oneself according to the design purpose, the utility model discloses no longer describe repeatedly its concrete realization content.
As other alternatives: the heating wire can be a linear heating wire made of solid alloy (such as nickel-chromium alloy) or a spiral product, and the heating section of the heating wire penetrates through and is embedded in the energy-containing fuel pressing block and keeps consistent with the width of the section of the energy-containing fuel pressing block in the same direction. The two ends of the heating section of the electric heating wire 2 are respectively provided with a connecting terminal for connecting a lead 3, and the power monitoring module is also connected with the connecting terminals of the electric heating wire 2 through the lead 3.
As an example, the energetic fuel compact is formed by compression molding, and has a cubic shape; the section of the pressing block is square, the side length is 5-8 mm, and the height is 5-10 mm; the linear electric heating wire with the diameter of 0.5mm is positioned on the central axis of the energy-containing fuel pressing block and is 1mm away from the surface of the pressing block, and the length of the heating section is consistent with the width of the section of the pressing block. The DC power supply 4 can select an adjustable DC stabilized power supply UDP5303, and the equipment is provided with a power monitoring module and a display screen for displaying monitoring data in real time. High-speed camera 5 can select AVT new color high-speed camera (Bonito-400 c)
An example of an application method:
based on the device, the ignition energy of the energy-containing fuel can be accurately measured according to the following method:
(1) Placing the heating section of the electric heating wire 2 in a pressing die, filling powdery energetic fuel and compacting and forming to obtain an energetic fuel pressing block 1 with the electric heating wire embedded; according to past experience, after the energetic materials are briquetted, the size of the briquetted block of the same energetic material under the laboratory test condition has little influence on the ignition energy and can be ignored.
(2) A direct current power supply in the power supply module is connected with wiring terminals at two ends of a heating section of the heating wire 2 by using a lead 3, and a power monitoring module in the power supply module is connected with the wiring terminals at two ends of the heating wire 2; the power monitoring module, the synchronous controller 6 and the high-speed camera 5 are connected in sequence by signal wires;
(3) The power monitoring module is used for setting the working power of the heating wire 2;
(4) The synchronous controller 6 is utilized to start the power monitoring module and the high-speed camera 5, so that the time for starting heating of the heating wire 2 and the time for starting recording of the high-speed camera 5 are kept synchronous, the energy-containing fuel pressing block 1 is ignited and continuously burnt after the heating wire 2 is heated for a certain time, the power monitoring module controls the heating wire 2 to work at a constant power P, and the high-speed camera 5 records the whole ignition process;
(5) If the ignition can be continued, the ignition is judged to be successful; calculating the ignition time length t of the energy-containing fuel pressure 1 according to the time when the heating wire 2 starts to heat and the ignition time of the energy-containing fuel briquetting recorded by the high-speed camera 5; since the heating wire 2 is entirely embedded in the energy-containing fuel briquette, it can be considered that all the heat radiation after the heating wire is operated is absorbed by the energy-containing fuel, that is, the integrated value of the power P within the ignition time period t after the heating wire 2 is electrified is the integrated value of the ignition power of the energy-containing fuel (i.e., the ignition energy).
The ignition energy E of the energetic fuel can be calculated according to the following equation:
E＝Pt
(6) After ignition of the energetic fuel compact 1, the high speed camera 5 continues to record until combustion is complete, and the recorded image information is used for analysis of combustion sustainability.
In the energy-containing fuel briquette, the effective component of the energy-containing fuel is any one of the following components: aluminum powder, boron powder, magnesium powder, solid propellant or explosive.
Table 1 shows exemplary specific parameters and ignition energy measurement calculations.
TABLE 1
As can be seen from table 1, in each test using the device of the present invention, the power required for igniting the single metal powder fuel is relatively large, generally more than 24 watts; after the propellant or the metal powder is added with ammonium perchlorate (the main component of the propellant), the ignition power is obviously reduced, generally between 10 and 24 watts; the explosive ignition power is the minimum, and is below 10 watts, which indicates that the implementation results in table 1 accord with the ignition characteristics of the actual energy-containing fuel.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An accurate measuring device for ignition energy of energy-containing fuel is characterized by comprising an energy-containing fuel pressing block, a heating wire ignition system, a high-speed camera and a synchronous controller; wherein the content of the first and second substances,
the heating wire ignition system comprises a power supply module and a heating wire pre-embedded in the energy-containing fuel pressing block, wherein a direct-current power supply and a power monitoring module are arranged in the power supply module; the direct current power supply is connected with two ends of the heating wire through a lead, and the power monitoring module is connected to the two ends of the heating wire and used for controlling the heating wire to heat at set power;
the camera of the high-speed camera is aligned to the energy-containing fuel pressing block, and the synchronous controller is respectively connected with the power monitoring module and the high-speed camera through signal lines and used for synchronizing the time when the electric heating wire starts to heat and the time when the high-speed camera starts to record.
2. The device for accurately measuring the ignition energy of the energy-containing fuel as claimed in claim 1, wherein the heating wire is a linear heating wire or a spiral heating wire made of a solid alloy material.
3. The device for accurately measuring the ignition energy of the energy-containing fuel as claimed in claim 1, wherein the heating section of the electric heating wire is embedded in the energy-containing fuel pressure block in a penetrating manner and is consistent with the width of the homodromous section of the energy-containing fuel pressure block.
4. The device for accurately measuring the ignition energy of the energy-containing fuel as claimed in claim 1, wherein two ends of the heating section of the electric heating wire are respectively provided with a connecting terminal.
5. The device for accurately measuring ignition energy of the energy-containing fuel as claimed in claim 1, wherein the energy-containing fuel compact is formed by compression molding and has a cubic shape; the section of the pressing block is square, the side length is 5-8 mm, and the height is 5-10 mm; the linear electric heating wire with the diameter of 0.5mm is positioned on the central axis of the energy-containing fuel pressing block and is 1mm away from the surface of the pressing block, and the length of the heating section is consistent with the width of the section of the pressing block.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222264233.5U CN218412510U (en) | 2022-08-27 | 2022-08-27 | Accurate measuring device for ignition energy of energetic fuel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222264233.5U CN218412510U (en) | 2022-08-27 | 2022-08-27 | Accurate measuring device for ignition energy of energetic fuel |
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| CN218412510U true CN218412510U (en) | 2023-01-31 |
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| CN202222264233.5U Active CN218412510U (en) | 2022-08-27 | 2022-08-27 | Accurate measuring device for ignition energy of energetic fuel |
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- 2022-08-27 CN CN202222264233.5U patent/CN218412510U/en active Active
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