CN106568888A - An experiment apparatus having a pressure stabilizing function and used for measuring the laminar flow burning rate of liquid fuel and a method thereof - Google Patents
An experiment apparatus having a pressure stabilizing function and used for measuring the laminar flow burning rate of liquid fuel and a method thereof Download PDFInfo
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- CN106568888A CN106568888A CN201610914740.5A CN201610914740A CN106568888A CN 106568888 A CN106568888 A CN 106568888A CN 201610914740 A CN201610914740 A CN 201610914740A CN 106568888 A CN106568888 A CN 106568888A
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- 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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Abstract
An experiment apparatus having a pressure stabilizing function and used for measuring the laminar flow burning rate of liquid fuel and a method thereof are disclosed. The apparatus includes a constant-volume incendiary bomb, platinum wire electrodes, a high-speed schlieren imaging system, a thermocouple, pressure gauges, four-way pneumatic connectors, high-pressure hoses, pilot-actuated safety valves, a pressure tank, a heating device and a fuel injecting valve. The apparatus can ensure that the pressure in the constant-volume incendiary bomb is constant in a whole experiment process, and can ensure safety of experiments under high-pressure conditions.
Description
Technical field
The invention belongs to fuel combustion characteristics research field, and in particular to a kind of measurement liquid fuel with voltage stabilizing function
The experimental provision and its method of laminar burning velocity.
Background technology
Laminar combustion is the important subprocess of turbulent combustion process, and the research to fuel laminar flow combustion characteristics is to grasp its combustion
Burn the important means of performance.Laminar combustion research has test and test process flame structure compared with simple and stable, state modulator side
Just the advantages of, can be used for reactive fuel laminar burning velocity, ignition energy, concentration and catch fire various combustions such as boundary and fuel delay period
Burn characterisitic parameter.Wherein, the numerical value of checking and turbulent combustion speed that laminar burning velocity can be used for fuel combustion mechanism is imitated
It is true etc., it is the important referential data for the equipment such as fresh fuel designed combustion device and special engine.Therefore, accurate laminar flow combustion
It is to realize the important guarantee of burner and the cleaning burning of electromotor colleges and universities to burn speed.
In the method for numerous research fuel laminar flow combustion characteristics, constant volume combustion bomb method is simple because of its model, data processing
Convenient, initial condition is easily controllable, is current most suitable method.Constant volume combustion bomb is typically a cylinder or class square
Container, both sides have a pair of quartz glass windows to be easy to light to pass through, around arrange fuel injection valve, heater, electrode
Silk, thermocouple, pressure gauge.When being tested, first a certain amount of fuel and air are injected by constant volume combustion bomb according to equivalent proportion
It is interior, required temperature is heated to heater, after fuel and the mixing of gas substantially uniformity, using wire electrode discharge
Mixed gas are lighted, while recording the change of flame front after igniting by high-speed schlieren imaging system.By schlieren picture, can
To calculate the laminar combustion characterisitic parameter such as laminar burning velocity, Markstein length of fuel.
The method presently, there are two weak points：1) in fuel combustion process, constant volume combustion bomb internal pressure can be drastically
Raise, the safety to testing has large effect, it is therefore desirable to which device materials have good high voltage performance；2) at data
During reason, it usually needs choose the data in burning starting stage pressure constant range to calculate laminar burning velocity, but
Because the pressure holding constant time is too short, to the selection of test data certain difficulty is caused.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of measurement liquid fuel with voltage stabilizing function
The experimental provision and its method of laminar burning velocity.
Technical scheme is as follows：
A kind of experimental provision of the measurement liquid fuel laminar burning velocity with voltage stabilizing function includes constant volume combustion bomb, electricity
Polar filament, high-speed schlieren imaging system, thermocouple, pressure gauge, four-way pneumatic joint, total four-way pneumatic joint, high-pressure rubber pipe, centre
High-pressure rubber pipe, total high-pressure rubber pipe, pilot operated safety valve, forbay, heater, fuel injection valve；
Constant volume combustion bomb is square, and in addition to two faces for being provided with form, remaining four face is respectively provided with four female threads
Hole, high-pressure rubber pipe is connected by internal thread hole and constant volume combustion bomb, and four high-pressure rubber pipes in each face are pneumatic by a four-way
Joint and an intermediate high-pressure sebific duct connection, four intermediate high-pressure sebific ducts being connected with four four-way pneumatic joints are total by one
Four-way pneumatic joint and a total high-pressure rubber pipe connection, total high-pressure rubber pipe and forbay connect, and are directly connected to constant volume combustion bomb
Each high-pressure rubber pipe on be respectively arranged with pilot operated safety valve, in constant volume combustion bomb be equipped with fuel injection valve, pressure gauge and thermoelectricity
It is even, pressure gauge is housed on forbay；Heater is arranged on the wall of constant volume combustion bomb surrounding, and wire electrode is arranged horizontally in just
To two faces on, and arranged direction is vertical with form direction, and the light path of high-speed schlieren imaging system is by constant volume combustion bomb
Form.
Preferably, the set-pressure of pilot operated safety valve is the 105% of constant volume combustion bomb initial pressure.
Preferably, described forbay is cuboid, before the igniting of constant volume combustion bomb fuel, the inflated with nitrogen into forbay,
Its initial pressure is identical with initial pressure in constant volume combustion bomb.
Preferably, it is described be provided with two faces of form in constant volume combustion bomb just to two faces.Wire electrode can be
Platinum electrode silk.
The method of the experimental provision of the described measurement liquid fuel laminar burning velocity with voltage stabilizing function is：Work
When, according to required fuel to air equivalence ratio, fuel and air are passed through into constant volume combustion bomb by fuel injection valve, and use adds
Temperature in constant volume combustion bomb is heated to target temperature by thermal, after fuel and air form uniform gaseous mixture, by electricity
The electric spark that polar filament is produced lights gaseous mixture, with the rising of pressure in constant volume combustion bomb, original pilot-operated type safety closed
Valve will be automatically opened up so that the pressure stability inside constant volume combustion bomb reaches the effect of voltage stabilizing the 101 ± 1% of initial pressure
Really, it is ensured that the carrying out of safety is capable of in experiment；The time dependent image of flame front is recorded with high-speed schlieren system, so as to can
Studied with the laminar combustion characteristic to liquid fuel.
High-speed schlieren imaging system of the present invention is used to record the time dependent image of flame front, can be this
Art personnel according to the device that the ultimate principle of stration technique is built can also be the schlieren that is commercially available on the market into
As system, high-speed motion picture camera, light source, schlieren mirror, blade organization are generally comprised.
The present invention compared with prior art, is had an advantageous effect in that：In constant volume combustion bomb after igniting, on high-pressure rubber pipe
Pilot operated safety valve can automatically open up when pressure rises so that the pressure immediate stability inside container, it is ensured that whole real
Test the safety of process.Meanwhile, the increase of constant voltage time section expands the selection range of test data, gives data handling procedure band
Facility is carried out.
Description of the drawings
Fig. 1 is that the structure of the experimental provision of the measurement liquid fuel laminar burning velocity with voltage stabilizing function of the present invention is shown
It is intended to.
In figure, 1 represents high-speed schlieren imaging system, and 2 represent heater, and 3 represent thermocouple, and 4 represent pilot-operated type safety
Valve, 5 represent four-way pneumatic joint, and 6 represent constant volume combustion bomb, and 7 represent high-pressure rubber pipe, and 8 represent wire electrode, 9 representative pressure tables, and 10
Representative pressure case, 11 represent fuel injection valve, and 12 represent intermediate high-pressure sebific duct, and 13 represent total high-pressure rubber pipe, and 14 represent total four-way
Pneumatic joint.
Specific embodiment
As shown in figure 1, a kind of experimental provision of the measurement liquid fuel laminar burning velocity with voltage stabilizing function includes determining
Hold firebomb 6, wire electrode 8, high-speed schlieren imaging system 1, thermocouple 3, pressure gauge 9, four-way pneumatic joint 5, total four-way pneumatic
Joint 14, high-pressure rubber pipe 7, intermediate high-pressure sebific duct 12, total high-pressure rubber pipe 13, pilot operated safety valve 4, forbay 10, heater
2nd, fuel injection valve 11；
Constant volume combustion bomb 6 is square, and in addition to two faces for being provided with form, remaining four face is respectively provided with four female threads
Hole, high-pressure rubber pipe 7 is connected by internal thread hole and constant volume combustion bomb, and four high-pressure rubber pipes 7 in each face are by one four ventilation
Dynamic joint 5 and an intermediate high-pressure sebific duct 12 connect, and four intermediate high-pressure sebific ducts being connected with four four-way pneumatic joints 5 pass through
One total four-way pneumatic joint 14 and a total high-pressure rubber pipe 13 connect, and total high-pressure rubber pipe 13 and forbay 10 connect, with constant volume
Pilot operated safety valve 4 is respectively arranged with each high-pressure rubber pipe 7 that firebomb 6 is directly connected to, is noted equipped with fuel in constant volume combustion bomb 6
Enter valve 11, pressure gauge 9 and thermocouple 3, pressure gauge 9 is housed on forbay 10；Heater 2 is arranged in the surrounding of constant volume combustion bomb 6
Wall on, wire electrode 8 be arranged horizontally in just to two faces on, and arranged direction is vertical with form direction, high-speed schlieren into
As the form that the light path of system 1 passes through constant volume combustion bomb 6.
On the basis of embodiment 1, the set-pressure of pilot operated safety valve 4 is the 105% of constant volume combustion bomb initial pressure.
Again in an alternative embodiment of the invention, described forbay 10 is cuboid, and the fuel of constant volume combustion bomb 6 is lighted a fire
Before, the inflated with nitrogen into forbay 10, its initial pressure is identical with initial pressure in constant volume combustion bomb 6.
Again in an alternative embodiment of the invention, it is described be provided with two faces of form in constant volume combustion bomb 6 just to
Two faces.Wire electrode 8 adopts platinum electrode silk.
The method of the experimental provision of the described measurement liquid fuel laminar burning velocity with voltage stabilizing function is：Work
When, according to required fuel to air equivalence ratio, fuel and air are passed through into constant volume combustion bomb 6 by fuel injection valve 11, and make
Temperature in constant volume combustion bomb 6 is heated to into target temperature with heater 2, after fuel and air form uniform gaseous mixture,
The electric spark produced by wire electrode 8 is lighted gaseous mixture, with the rising of pressure in constant volume combustion bomb 6, original elder generation for closing
Conduction relief valve 4 will be automatically opened up so that the pressure stability inside constant volume combustion bomb 6 reaches the 101 ± 1% of initial pressure
To the effect of voltage stabilizing, it is ensured that the carrying out of safety is capable of in experiment；It is time dependent flame front to be recorded with high-speed schlieren system 1
Image, such that it is able to study the laminar combustion characteristic of liquid fuel.
Claims (5)
1. it is a kind of with voltage stabilizing function measurement liquid fuel laminar burning velocity experimental provision, it is characterised in that including constant volume
Firebomb (6), wire electrode (8), high-speed schlieren imaging system (1), thermocouple (3), pressure gauge (9), four-way pneumatic joint (5),
Total four-way pneumatic joint (14), high-pressure rubber pipe (7), intermediate high-pressure sebific duct (12), total high-pressure rubber pipe (13), pilot operated safety valve
(4), forbay (10), heater (2), fuel injection valve (11)；
Constant volume combustion bomb (6) is square, and in addition to two faces for being provided with form, remaining four face is respectively provided with four female threads
Hole, high-pressure rubber pipe (7) is connected by internal thread hole and constant volume combustion bomb, and four high-pressure rubber pipes (7) in each face are by one four
Logical pneumatic joint (5) is connected with an intermediate high-pressure sebific duct (12), high in the middle of four be connected with four four-way pneumatic joints (5)
Moulding Gutron crosses a total four-way pneumatic joint (14) and total high-pressure rubber pipe (13) connection, total high-pressure rubber pipe (13) and pressure
Case (10) connects, and on each high-pressure rubber pipe (7) being directly connected to constant volume combustion bomb (6) pilot operated safety valve (4) is respectively arranged with,
Fuel injection valve (11), pressure gauge (9) and thermocouple (3) are housed in constant volume combustion bomb (6), pressure gauge is housed on forbay (10)
(9)；Heater (2) is arranged on the wall of constant volume combustion bomb (6) surrounding, wire electrode (8) be arranged horizontally in just to two
On face, and arranged direction is vertical with form direction, light path the regarding by constant volume combustion bomb (6) of high-speed schlieren imaging system (1)
Window.
2. it is according to claim 1 with voltage stabilizing function measurement liquid fuel laminar burning velocity experimental provision, its
It is characterized in that, the set-pressure of pilot operated safety valve (4) is the 105% of constant volume combustion bomb initial pressure.
3. it is according to claim 1 with voltage stabilizing function measurement liquid fuel laminar burning velocity experimental provision, its
It is characterised by that described forbay (10) is cuboid, before the igniting of constant volume combustion bomb (6) fuel, to the interior nitrogen charging of forbay (10)
Initial pressure is identical in gas, its initial pressure and constant volume combustion bomb (6).
4. it is according to claim 1 with voltage stabilizing function measurement liquid fuel laminar burning velocity experimental provision, its
Be characterised by it is described be provided with two faces of form in constant volume combustion bomb (6) just to two faces.
5. a kind of experiment using the measurement liquid fuel laminar burning velocity with voltage stabilizing function as claimed in claim 1 is filled
The method put, when it is characterized in that work, according to required fuel to air equivalence ratio, by fuel injection valve (11) to constant volume combustion bomb
(6) fuel and air are passed through in, and the interior temperature of constant volume combustion bomb (6) is heated to into target temperature using heater (2), wait to fire
Material and air are formed after uniform gaseous mixture, and the electric spark produced by wire electrode (8) is lighted gaseous mixture, with constant volume burning
The rising of the interior pressure of bullet (6), original pilot operated safety valve (4) closed will be automatically opened up so that constant volume combustion bomb (6) is internal
Pressure stability the 101 ± 1% of initial pressure, reach the effect of voltage stabilizing, it is ensured that experiment be capable of safety carrying out；Use high speed stricture of vagina
Shadow system (1) records the time dependent image of flame front, such that it is able to carry out to the laminar combustion characteristic of liquid fuel
Research.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914740.5A CN106568888B (en) | 2016-10-20 | 2016-10-20 | The experimental provision and its method of measurement liquid fuel laminar burning velocity with voltage stabilizing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914740.5A CN106568888B (en) | 2016-10-20 | 2016-10-20 | The experimental provision and its method of measurement liquid fuel laminar burning velocity with voltage stabilizing function |
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| Publication Number | Publication Date |
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| CN106568888A true CN106568888A (en) | 2017-04-19 |
| CN106568888B CN106568888B (en) | 2018-10-19 |
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| CN201610914740.5A Expired - Fee Related CN106568888B (en) | 2016-10-20 | 2016-10-20 | The experimental provision and its method of measurement liquid fuel laminar burning velocity with voltage stabilizing function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397907A (en) * | 2020-02-24 | 2020-07-10 | 浙江大学 | System for researching cellularization flame space structure based on three-dimensional schlieren imaging technology |
| CN113109498A (en) * | 2021-03-12 | 2021-07-13 | 北京航天动力研究所 | Isobaric combustion device for quenching test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006349A1 (en) * | 1994-08-23 | 1996-02-29 | California Analytical Instruments, Inc. | Improved flame ionization detector |
| CN101382533A (en) * | 2008-10-15 | 2009-03-11 | 西安近代化学研究所 | Device for testing powder combustion characteristics in vacuum condition |
| CN104062394A (en) * | 2014-05-29 | 2014-09-24 | 南京航空航天大学 | Gaseous-phase Bunsen burner laminar flame propagation speed measurement device and measurement method for liquid fuel |
| CN104391074A (en) * | 2014-10-09 | 2015-03-04 | 西华大学 | Constant volume combustion bomb and liquid fuel combustion performance testing method |
| CN204594950U (en) * | 2015-04-17 | 2015-08-26 | 上海交通大学 | The constant volume combustion system analyzed is detected for solid fuel ignition |
-
2016
- 2016-10-20 CN CN201610914740.5A patent/CN106568888B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006349A1 (en) * | 1994-08-23 | 1996-02-29 | California Analytical Instruments, Inc. | Improved flame ionization detector |
| CN101382533A (en) * | 2008-10-15 | 2009-03-11 | 西安近代化学研究所 | Device for testing powder combustion characteristics in vacuum condition |
| CN104062394A (en) * | 2014-05-29 | 2014-09-24 | 南京航空航天大学 | Gaseous-phase Bunsen burner laminar flame propagation speed measurement device and measurement method for liquid fuel |
| CN104391074A (en) * | 2014-10-09 | 2015-03-04 | 西华大学 | Constant volume combustion bomb and liquid fuel combustion performance testing method |
| CN204594950U (en) * | 2015-04-17 | 2015-08-26 | 上海交通大学 | The constant volume combustion system analyzed is detected for solid fuel ignition |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397907A (en) * | 2020-02-24 | 2020-07-10 | 浙江大学 | System for researching cellularization flame space structure based on three-dimensional schlieren imaging technology |
| CN113109498A (en) * | 2021-03-12 | 2021-07-13 | 北京航天动力研究所 | Isobaric combustion device for quenching test |
| CN113109498B (en) * | 2021-03-12 | 2023-02-03 | 北京航天动力研究所 | Isobaric combustion device for quenching test |
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| CN106568888B (en) | 2018-10-19 |
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