CN103926371A - Device and method for testing gas generation rate of solid combustible - Google Patents
Device and method for testing gas generation rate of solid combustible Download PDFInfo
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- CN103926371A CN103926371A CN201410182108.7A CN201410182108A CN103926371A CN 103926371 A CN103926371 A CN 103926371A CN 201410182108 A CN201410182108 A CN 201410182108A CN 103926371 A CN103926371 A CN 103926371A
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Abstract
The invention discloses a device and a method for testing a gas generation rate of a solid combustible. The device is of a cylindrical structure, a porous clapboard is arranged at the middle to divide a combustion device into a combustion chamber and a filter chamber, a pressure tap and a gas conveying hole are formed in shell of the combustion chamber, a temperature measurement hole is formed in a shell of the filter chamber, and a front end cover and a rear end cover are fixedly connected to the two ends of the combustion device; an ignition electrode is installed on the front end cover and is connected with an ignition wire together with the solid combustible, a heating pipe and a temperature measurement sensor are placed in a filter medium filling the filter chamber, and a breathable material interlayer is arranged between the rear end cover and the filter medium. An ignition control device is used for applying a voltage to the ignition electrode to burn the solid combustible. A pressure measurement sensor is used for measuring the pressure in the combustion chamber in real time, and a temperature regulation and control device is used for regulating the temperature in the filter chamber to be at a set value. The testing device and the testing method are used for testing the gas generation rate of combustion at given pressure and in a heating environment, thereby improving the testing precision and avoiding experimental error caused by condensation of gas phase products with low boiling points in the filter chamber.
Description
Technical field
The invention belongs to combustion testing technical field, specifically, relate to a kind of one-tenth gas rate proving installation and method of solid combustible, be applicable to solid combustible especially the burning of solid propellant become gas rate test.
Background technology
Burn into gas rate and refer to after substance combustion, the gas-phase product quality of generation accounts for the percentage of sample proper mass.For solid combustible especially solid propellant, under given pressure, test is burnt into gas rate and is had more practical significance; In experiment gas-phase product separate time because condensing of low boiling products of combustion can be caused certain experimental error.Therefore how under given pressure, accurately to test into gas rate and become the focus of problem.
Existing disclosed document " burning of fuel-rich propellant becomes gas rate testing research " (solid-rocket technology, 2009, the 32nd the 5th phase of volume) in a kind of combustible proposed burnt into the method for gas rate test, realized separating of sample gas-phase product and solidifying phase product.But proving installation has the following disadvantages: (1) can not realize and under given pressure, test sample and become gas rate; (2) because low boiling gas-phase product can condense in filter medium, cause realizing gas-phase product in hot lower separation completely, can bring like this experimental error.In patent of invention 201310141664.5, propose " a kind of energetic material burns into gas rate proving installation and method ", method of testing described in the former has been carried out having improved filter effect, and realized gas-phase product and solidifying phase product separating under hot.The defect of this proving installation and method is: (1) can not realize and under given pressure, test sample and become gas rate; (2) do not design portfire, rely on entirety to heat and make sample spontaneous combustion, sample self-ignition temperature is required strictly, light a fire unreliable, and sample spontaneous combustion to be different from the mechanism of ignition; (3) owing to adopting heating jacket to the heating of burner entirety, make device huge, quality is heavier, is unfavorable for reducing experimental error; Also make troubles to experimental implementation.
Summary of the invention
The deficiency existing for fear of prior art, the present invention proposes a kind of one-tenth gas rate proving installation and method of solid combustible, realize at given pressure and burn into gas rate with test under heating environment by proving installation, both can realize the effective filtration to solidifying phase product, the experimental error of having avoided again low boiling gas-phase product to condense in filtering layer and to cause, improve measuring accuracy, made its more realistic burning condition.
The technical solution adopted for the present invention to solve the technical problems is: the one-tenth gas rate proving installation of solid combustible, comprise burner, ignition control device, pressure regulates and air delivery device, temperature control device, experimental stand, it is characterized in that described burner comprises firing chamber, filter chamber, dividing plate, front end end cover, rear end cap, filter medium, gas permeable material, temperature probe, heating tube, spark electrode, ignition wire, solid combustible, burner is columnar structured, centre has dividing plate with holes that burner is separated into firing chamber and filter chamber, on sidewall of combustion chamber, there are pressure tap and transfer port, on filter chamber's sidewall, there is thermometer hole, front end end cover and rear end cap are connected in the two ends of burner by screw thread, front end end cover middle part is provided with spark electrode, in spark electrode and firing chamber, solid combustible is connected with ignition wire, in filter chamber, fill filter medium, U-shaped heating tube and temperature probe are placed in the filter medium of filling in filter chamber, have gas permeable material interlayer between rear end cap and filter medium, uniform multiple air holes on rear end cap, and air hole diameter is 1～2mm, uniform multiple air holes on dividing plate, air hole diameter is 1～2mm,
Described filter medium adopts Mg0 and carbon fiber or acid-washed asbestos;
Described gas permeable material adopts high silica filter cloth.
Utilize the one-tenth gas rate proving installation of solid combustible to test a method of testing for the one-tenth gas rate of solid combustible, it is characterized in that comprising the following steps:
Step 1. weighs solid combustible sample quality, and solid combustible is placed in firing chamber, and spark electrode is connected ignition wire with solid combustible;
Step 2. weighs the quality of the front burner of burning;
Step 3. is fixed on burner on experimental stand, is fixedly connected with load cell, temperature probe, gas piping, ignition control device;
Step 4. is set filter chamber's temperature, and temperature regulator is controlled heating tube power supply after receiving the signal of temperature probe, and filtration indoor temperature is adjusted to setting value, and setting value is 100 DEG C～300 DEG C;
Step 5. is set combustion chamber pressure, gas cylinder supply gas, pass in firing chamber through reduction valve, flow regulator, transfer port, load cell is measured pressure in firing chamber in real time, and pressure information is fed back to flow regulator, flow regulator receives feedback information adjusting gas flow makes pressure remain on setting value;
Step 6. was ventilated after 5 minutes, treated that temperature, pressure are all adjusted to setting value, and ignition control device receives and spark electrode applied to voltage after instruction and light solid combustible;
Step 7. is taken off burner from experimental stand, sheds load cell, temperature probe, gas piping, ignition control device, weighs the burner quality after burning, and the one-tenth gas rate that obtains sample combustion is
Wherein, m is solid combustible sample quality, m
1for the burner quality after burning, m
2for the burner quality before burning.
Beneficial effect
One-tenth gas rate proving installation and the method for the solid combustible that the present invention proposes, be made up of burner, ignition control device, pressure adjusting and air delivery device, temperature control device and experimental stand.Burner adopts columnar structured, centre has dividing plate with holes that burner is separated into firing chamber and filter chamber, on sidewall of combustion chamber, have pressure tap and transfer port, on filter chamber's sidewall, have thermometer hole, front end end cover and rear end cap are connected in burner two ends by screw thread; Front end end cover is equipped with spark electrode, and is connected with ignition wire with solid combustible; In filtrator, be filled with heat-resisting, insulation, incombustible filter medium, heating tube and temperature probe are placed in the filter medium of filling in filter chamber, have some apertures on rear end cap, have gas permeable material interlayer between the filter medium in rear end cap and filter chamber.Ignition control device applies voltage to spark electrode, lights solid combustible.Gas cylinder passes into gas in firing chamber via reduction valve, flow regulator, transfer port, load cell is connected on pressure tap, measure in real time pressure in firing chamber, and pressure information is fed back to flow regulator, flow regulator receives that feedback information adjusting gas flow makes pressure remain on setting value.Temperature regulator is controlled heating tube power supply after receiving the signal of temperature probe, and temperature in filter chamber's device is adjusted in to setting value.Proving installation both can have been realized the effective filtration to solidifying phase product, had avoided again low boiling gas-phase product to condense in filtering layer and the experimental error that causes.Proving installation be applicable to solid combustible especially the burning of solid propellant become gas rate test.
Brief description of the drawings
Below in conjunction with drawings and embodiments, one-tenth gas rate proving installation and the method for a kind of solid combustible of the present invention are described in further detail.
Fig. 1 is the one-tenth gas rate proving installation structural representation of solid combustible of the present invention.
Fig. 2 is the one-tenth gas rate test device system figure of solid combustible of the present invention.
In figure:
1. spark electrode 2. front end end cover 3. ignition wire 4. solid combustible 5. firing chamber 6. dividing plate 7. filter chamber's 8. filter medium 9. rear end cap 10. gas permeable material 11. thermometer hole 12. temperature probe 13. heating tube 14. pressure tap 15. transfer ports
Embodiment
Consult Fig. 1, Fig. 2, the one-tenth gas rate proving installation of the present embodiment solid combustible, is made up of burner, ignition control device, pressure adjusting and air delivery device, temperature control device, experimental stand; Wherein, burner comprises firing chamber 5, filter chamber 7, dividing plate 6, front end end cover 2, rear end cap 9, filter medium 8, gas permeable material 10, temperature probe 12, heating tube 13, spark electrode 1, ignition wire 3, solid combustible 4; Burner is columnar structured, adopts aluminum alloy materials moulding.Burner middle part is provided with dividing plate 6 with holes burner is separated into firing chamber 5 and filter chamber's 7 two parts, and chamber length is 40～60mm, has pressure tap 14 and transfer port 15 on 5 sidewalls of firing chamber; Filter chamber's length is 60～80mm, on filter chamber's 7 sidewalls, has thermometer hole 11; Firing chamber is all 40～50mm mutually with filtrator external diameter; On central dividing plate 6, be uniformly distributed 25 air holes, air hole diameter is 1～2mm.On front end end cover 2 and rear end cap 9, be provided with screw thread, front end end cover 2 and rear end cap 9 are connected in the two ends of burner by screw thread, front end end cover 2 middle parts are provided with spark electrode 1, spark electrode 1 is connected with ignition wire 3 with the interior solid combustible 4 in firing chamber 5, on rear end cap 9, be uniformly distributed 25 air holes, air hole diameter is 1～2mm; In filter chamber 7, be filled with filter medium 8, U-shaped heating tube 13 is placed in the filter medium 8 of filter chamber's 7 interior fillings with temperature probe 12, gas permeable material 10 interlayers are housed between rear end cap 9 and filter medium 8, and filter medium 8 is selected Mg0 and carbon fiber or acid-washed asbestos; Gas permeable material 10 adopts high silica filter cloth.
In the present embodiment, pressure regulates with air delivery device and comprises gas cylinder, reduction valve, flow regulator, load cell, is realized the interior pressure in firing chamber 5 is controlled by flow regulator; Gas is passed in firing chamber 5 through reduction valve, flow regulator, transfer port by gas cylinder, load cell is connected on pressure tap, measure in real time the interior pressure in firing chamber 5, and pressure information is fed back to flow regulator, flow regulator receives feedback information adjusting gas flow makes pressure remain on setting value, realizes combustible under given pressure and become the test of gas rate.Before igniting, pass into gas and original gas in firing chamber can be driven away for 5 minutes, input gas with various burns solid combustible 4.Temperature control device comprises temperature probe, temperature regulator, heating tube, temperature regulator receives the signal of temperature probe, temperature regulator is controlled heating tube power supply after receiving the signal of temperature probe, interior filter chamber 7 temperature is regulated and remains on setting value, realize gas-phase product and separate under thermal environment, prevent that low-boiling point material in gas-phase product from condensing in filter chamber and the experimental error that causes.
Utilize the one-tenth gas rate proving installation of described solid combustible to test the method for testing of the one-tenth gas rate of solid combustible, it is characterized in that comprising the following steps:
It is 5.6473g that step 1. weighs solid combustible sample quality, and solid combustible is placed in firing chamber, is connected in ignition wire;
The quality that step 2. weighs whole burner is 383.47g;
Step 3. is fixed on burner on experimental stand, connects load cell, temperature probe, gas piping, ignition control device;
It is 250 DEG C that step 4. is set filter chamber's temperature, and temperature regulator is controlled heating tube power supply after receiving the signal of temperature probe, and filtration indoor temperature is adjusted to setting value;
It is 1MPa that step 5. is set combustion chamber pressure, gas cylinder supply gas, pass in firing chamber through reduction valve, flow regulator, transfer port, load cell is connected on pressure tap, measure in real time pressure in firing chamber, and pressure information is fed back to flow regulator, flow regulator receives feedback information adjusting gas flow makes pressure remain on setting value; The present embodiment mesohigh gas cylinder is selected nitrogen;
Step 6. was ventilated after 5 minutes, treated that temperature, pressure are all adjusted to setting value, and ignition control device receives and spark electrode applied to voltage after instruction and light solid combustible;
Step 7. is taken off burner from experimental stand, sheds load cell, temperature probe, gas piping, ignition control device, and the burner quality weighing after burning is 381.15g, and the one-tenth gas rate that obtains sample combustion is:
Wherein, m is solid combustible sample quality, m
1for the burner quality after burning, m
2for the burner quality before burning.
Claims (2)
1. the one-tenth gas rate proving installation of a solid combustible, comprise burner, ignition control device, pressure regulates and air delivery device, temperature control device, experimental stand, it is characterized in that: described burner comprises firing chamber, filter chamber, dividing plate, front end end cover, rear end cap, filter medium, gas permeable material, temperature probe, heating tube, spark electrode, ignition wire, solid combustible, burner is columnar structured, centre has dividing plate with holes that burner is separated into firing chamber and filter chamber, on sidewall of combustion chamber, there are pressure tap and transfer port, on filter chamber's sidewall, there is thermometer hole, front end end cover and rear end cap are connected in the two ends of burner by screw thread, front end end cover middle part is provided with spark electrode, in spark electrode and firing chamber, solid combustible is connected with ignition wire, in filter chamber, fill filter medium, U-shaped heating tube and temperature probe are placed in the filter medium of filling in filter chamber, have gas permeable material interlayer between rear end cap and filter medium, uniform multiple air holes on rear end cap, and air hole diameter is 1～2mm, uniform multiple air holes on dividing plate, air hole diameter is 1～2mm,
Described filter medium adopts Mg0 and carbon fiber or acid-washed asbestos;
Described gas permeable material adopts high silica filter cloth.
2. utilize the one-tenth gas rate proving installation of the solid combustible described in claim 1 to test a method of testing for the one-tenth gas rate of solid combustible, it is characterized in that comprising the following steps:
Step 1. weighs solid combustible sample quality, and solid combustible is placed in firing chamber, and spark electrode is connected ignition wire with solid combustible;
Step 2. weighs the quality of the front burner of burning;
Step 3. is fixed on burner on experimental stand, is fixedly connected with load cell, temperature probe, gas piping, ignition control device;
Step 4. is set filter chamber's temperature, and temperature regulator is controlled heating tube power supply after receiving the signal of temperature probe, and filtration indoor temperature is adjusted to setting value, and setting value is 100 DEG C～300 DEG C;
Step 5. is set combustion chamber pressure, gas cylinder supply gas, pass in firing chamber through reduction valve, flow regulator, transfer port, load cell is measured pressure in firing chamber in real time, and pressure information is fed back to flow regulator, flow regulator receives feedback information adjusting gas flow makes pressure remain on setting value;
Step 6. was ventilated after 5 minutes, treated that temperature, pressure are all adjusted to setting value, and ignition control device receives and spark electrode applied to voltage after instruction and light solid combustible;
Step 7. is taken off burner from experimental stand, sheds load cell, temperature probe, gas piping, ignition control device, weighs the burner quality after burning, and the one-tenth gas rate that obtains sample combustion is:
Wherein, m is solid combustible sample quality, m
1for the burner quality after burning, m
2for the burner quality before burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410182108.7A CN103926371A (en) | 2014-04-30 | 2014-04-30 | Device and method for testing gas generation rate of solid combustible |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410182108.7A CN103926371A (en) | 2014-04-30 | 2014-04-30 | Device and method for testing gas generation rate of solid combustible |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105277670A (en) * | 2015-10-14 | 2016-01-27 | 西安近代化学研究所 | Gunpowder specific volume measuring instrument |
| CN105911213A (en) * | 2016-04-07 | 2016-08-31 | 西北工业大学 | Constant-pressure apparatus used in testing of burning rate of solid propellant |
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| CN201607417U (en) * | 2010-01-21 | 2010-10-13 | 西北工业大学 | Unit for measuring ignition temperature of gunpowder |
| CN103235084A (en) * | 2013-04-22 | 2013-08-07 | 西北工业大学 | Device and method for testing gas generation rate of energetic material during combustion |
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2014
- 2014-04-30 CN CN201410182108.7A patent/CN103926371A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201607417U (en) * | 2010-01-21 | 2010-10-13 | 西北工业大学 | Unit for measuring ignition temperature of gunpowder |
| CN103235084A (en) * | 2013-04-22 | 2013-08-07 | 西北工业大学 | Device and method for testing gas generation rate of energetic material during combustion |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277670A (en) * | 2015-10-14 | 2016-01-27 | 西安近代化学研究所 | Gunpowder specific volume measuring instrument |
| CN105911213A (en) * | 2016-04-07 | 2016-08-31 | 西北工业大学 | Constant-pressure apparatus used in testing of burning rate of solid propellant |
| CN105911213B (en) * | 2016-04-07 | 2018-01-02 | 西北工业大学 | A kind of solid propellant burning velocity testing constant-voltage equipment |
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Application publication date: 20140716 |