CN104089750A - Top combustion stove flow field simulation device and method - Google Patents
Top combustion stove flow field simulation device and method Download PDFInfo
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- CN104089750A CN104089750A CN201410336328.0A CN201410336328A CN104089750A CN 104089750 A CN104089750 A CN 104089750A CN 201410336328 A CN201410336328 A CN 201410336328A CN 104089750 A CN104089750 A CN 104089750A
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Abstract
The invention provides a top combustion stove flow field simulation device. The top combustion stove flow field simulation device comprises a transparent top combustion stove model (5), an air blower (10), a data transmitter (18), a data receiver (19) and a computer (20). The invention further provides a top combustion stove flow field simulation method. According to the top combustion stove flow field simulation method, gas flow rate distribution at different positions in a top combustion stove is monitored online, gas flow field distribution is demonstrated by tracer particles, and therefore the purposes that a flow field is vividly displayed and flow rate distribution is quantitatively displayed are achieved and the top combustion stove flow field and flow rate distribution simulation method is simple and accurate.
Description
Technical field
The present invention relates to gas flowfield studying technological domain, particularly a kind of top combustion stove flow field simulation device and analogy method thereof in iron-making heat wind furnace.
Background technology
As far back as Hartmann's twenties in 20th century (Hartmann), just proposed the imagination of application top combustion stove, but do not come into one's own.Until the sixties in 20th century, due to the requirement of high wind-warm syndrome, people's top combustion stove that just begins one's study.But, external research also rests on test and conceptual level, does not also drop into industrial application.China adopts the country of top combustion stove in the world the earliest, late 1970s, Shoudu Iron and Steel Co has successfully been developed the top combustion stove that has self patented technology, top combustion stove is that firing chamber is moved on to heat generator vault, improve the usable floor area of checker brick, reduced floor area, with traditional internal combustion type and external combustion stove comparison, having the advantages such as simple in structure, floor area is little, output investment ratio is lower, is the developing direction of heat generator technology from now on.
In recent years top combustion stove technical development is swift and violent, successively there is card Shandong goldentop burning type hot-air furnace, the types such as ball formula top combustion stove and spiral-flow type top combustion stove, whether top combustion stove flow field distributes evenly and its serviceable life, the factors such as heat exchange efficiency are closely associated, gas flow is very complicated motion problems, for flow velocity in traditional stove and flow field, measure, conventionally adopt anemoscope single-spot testing method, there is the problems such as each point measurement data is asynchronous and inaccurate, therefore improve simulated determination device, the accuracy and the testing efficiency that improve flow-field test are extremely important.
Summary of the invention
Technical matters to be solved by this invention be to provide a kind of test simply, the device of top combustion stove flow field simulation accurately and analogy method thereof.
For solving the problems of the technologies described above, the invention provides a kind of top combustion stove flow field simulation device, comprise transparent top combustion stove model, fan blower, data transmitter, data sink, and the computing machine being connected with described data sink, in described heat generator model, be provided with detecting element, described detecting element is connected with data transmitter, after described fan blower is connected with electronic flow-meter with variable valve, electronic pressure measuring apparatus successively, then be connected with described heat generator model with lower stop valve through upper stop valve.
Further, on described variable valve, be provided with the valve opening detecting element with described data transmitter connection, on described electronic pressure measuring apparatus, be provided with the pressure detecting element with described data transmitter connection, on described electronic flow-meter, be provided with the flow detecting element with described data transmitter connection.
Further, described heat generator model comprises furnace roof, shaft enlarging and checker brick.
Further, the entrance measuring point place of described checker brick is provided with the detecting element being connected with described data transmitter, and the outlet measuring point place of described checker brick is provided with the detecting element being connected with described data transmitter.
A kind of top combustion stove flow field simulation method provided by the invention, comprises the steps:
1), while entering heat generator model from the air of fan blower, the pressure of air and flow signal are collected to computing machine, to determine gas working condition;
2) utilize homalographic multi-point speed measuring method, by the detecting element in heat generator model, measured the air velocity at each measuring point place in stove, and the gas flow rate data of each measuring point are delivered to computing machine through data transmitter and data sink;
3) trace particle is put into heat generator model, the camera by computing machine is taken the running orbit of trace particle under gas flowfield effect and is stored in computing machine;
4) computing machine, according to the gas flow rate data of each measuring point and the running orbit of trace particle, is exported furnace gas flow velocity and Flow Field Distribution cloud atlas by image processing software matching.
Further, in described homalographic multi-point speed measuring method, definite method of each measuring point is:
In heat generator model, get the cross section perpendicular to shaft, on same cross section, get n concentric circles, and each annulus area is equated, then get minute concentric circless such as ray that m bar is crossed the concentric circles center of circle, the intersection point of m bar ray and each circumference is each measuring point of mensurated gas composition flow velocity.
Further, the described concentric circles number n getting on same cross section is 5≤n≤100, and the described ray number m that crosses the concentric circles center of circle is 12≤m≤144.
Further, the detection data transmission of described data transmitter is wireless or Bluetooth transmission to the mode of data sink.
Further, the particle size diameter of described trace particle is less than 5mm, and density is less than 1.2kg/m
3.
Top combustion stove flow field simulation device provided by the invention and analogy method thereof, tool has the following advantages:
1, equal-area method is determined the measuring point on same cross section in stove, guarantees the continuity of different cross section overdraught velocity distribution
By measuring the gas velocity of position of halving and image matching on each circumference of homalographic donut on same cross section, guaranteed to distribute at the air-flow of same radius position, not only guaranteed Velocity Profiles continuity, and for effectively judging whether top combustion stove gas cyclone evenly provides accurate measurement data.
2, Particle-beam Tracing is visual strong
Adopt trace particle, follow the tracks of the movement locus of trace particle, can effectively show gas motion path, image shows gas flowfield.
Accompanying drawing explanation
The structural representation of the top combustion stove flow field simulation device that Fig. 1 provides for the embodiment of the present invention.
The top combustion stove layering point position figure of the top combustion stove flow field simulation method that Fig. 2 provides for the embodiment of the present invention.
The measuring point distribution plan in the top combustion stove A-A cross section of the top combustion stove flow field simulation method that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Referring to Fig. 1, a kind of top combustion stove flow field simulation device that the embodiment of the present invention provides, comprise transparent top combustion stove model 5, fan blower 10, data transmitter 18, data sink 19, and the computing machine 20 being connected with data sink 19, the interior detecting element that arranges of heat generator model 5, described detecting element is connected with data transmitter 18, after fan blower 10 is connected with electronic flow-meter 13 with variable valve 11, electronic pressure measuring apparatus 12 successively, upper stop valve 4 is connected with heat generator model 5 with lower stop valve 14.
Wherein, on variable valve 11, be provided with data transmitter 18 by the valve opening detecting element 1 of connection, on electronic pressure measuring apparatus 12, be provided with data transmitter 18 and pass through the pressure detecting element 2 of connection, on electronic flow-meter 13, be provided with data transmitter 18 by the flow detecting element 3 of connection.The setting of valve opening detecting element 1, pressure detecting element 2, flow detecting element 3 and heat generator model 5 interior detecting elements, can realize online detection and the demonstration of each measuring point gas velocity in gas flow, pressure, valve opening and stove, greatly reduce and measured step by step the error causing.Wherein, heat generator model 5 comprises furnace roof 7, shaft enlarging 8 and checker brick 15.
Wherein, entrance measuring point 9 places of checker brick 15 are provided with data transmitter 18 by the detecting element of connection, and outlet measuring point 17 places of checker brick 15 are provided with data transmitter 18 by the detecting element of connection.
The top combustion stove flow field simulation method that the embodiment of the present invention provides, comprises the steps:
1) air from fan blower 10 passes through variable valve 11 successively, after electronic pressure measuring apparatus 12 and electronic flow-meter 13, when the upper stop valve 4 of process or lower stop valve 14 enter heat generator model 5 again, valve opening detecting element 1 is by the valve opening data of the variable valve detecting 11, pressure detecting element 2 and flow detecting element 3 send the air pressure detecting and air flow rate signal to data transmitter 18, data transmitter 18 is transferred to data sink 19 by relevant data signals by wireless or bluetooth approach, data sink 19 will receive data-signal again and directly flow to computing machine 20, computing machine 20 is determined the working condition of gas by data analysis.
2) utilize homalographic multi-point speed measuring method, by the detecting element being arranged in heat generator model 5, measure the flow velocity at air each measuring point place in stove, and the gas flow rate data of each measuring point are delivered to computing machine 20 through data transmitter 18 and data sink 19.
Wherein, in homalographic multi-point speed measuring method, definite method of each measuring point is specially:
Referring to Fig. 2, in heat generator model 5, get a plurality of cross sections perpendicular to shaft, as a kind of embodiment of the present invention, in the interior intercepting of shaft enlarging 8 A, B, C, D, E, six cross sections of F of top combustion stove model 5, at a cross section H of furnace bottom intercepting of top combustion stove model 5.
Referring to Fig. 3, on same cross section, to get n concentric circles, and the area of each annulus of concentric circles formation is equated, then get minute concentric circless such as ray that m bar is crossed the concentric circles center of circle, the intersection point of m bar ray and each circumference is the measuring point of mensurated gas composition flow velocity; The concentric circles numerical value n getting on same cross section is 5≤n≤100, and the number of rays m that crosses the concentric circles center of circle is 12≤m≤144.In order to reduce workload, reduce working strength, as a kind of embodiment of the present invention, on the A-A cross section of top combustion stove model 5, get 5 concentric circless, and guarantee that the area of the annulus that 5 concentric circless form equates; Then cross the concentric circles center of circle and get 12 each concentric circless of ray decile, the intersection point of 12 rays and each circumference is each measuring point of mensurated gas composition flow velocity.The coordinate of each measuring point on A-A cross section (Xi, Yi) is shown in Table 1.
Each measuring point coordinate in the stove of table 1A-A cross section
Then according to the method for above-mentioned location survey point equally really, then determine the gas flow rate measuring point on other cross sections such as B-B cross section, C-C cross section, D-D cross section.
When simulated combustion is during the phase, close lower stop valve 14, air is after variable valve 11, electronic pressure measuring apparatus 12, electronic flow-meter 13, by upper stop valve 4, from the uptake 6 of heat generator model 5, entered in stove, furnace air, through the entrance measuring point 9 of furnace roof 7, checker brick 15, is discharged from checker brick 15 outlet at bottoms.In the process of air turnover heat generator model 5, directly the detecting element in heat generator model 5 is placed on each measuring point in A-A cross section of heat generator model 5, gas flow rate Vi on the coordinate of each measuring point (Xi, Yi) and corresponding each measuring point is transferred to data transmitter 18 by detecting element, then flows to computing machine 20 through data sink 19.Computing machine 20 carries out analyzing and processing by image processing software to the gas flow rate Vi of each measuring point coordinate (Xi, Yi) and corresponding each measuring point, obtains the three-dimensional Flow Field Distribution cloud atlas about (Xi, Yi, Vi).
Can measure after the same method the gas flow rate of each measuring point on other cross sections such as B-B cross section, C-C cross section or D-D cross section.Certainly, in stove, Suo Qu position in cross section is when the entrance measuring point 9 of checker brick 15 or outlet measuring point 17 place of checker brick 15, can be by being arranged on the more convenient mensuration of the detecting element at checker brick 15 entrance measuring points 9 and the outlet measuring point 17 places gas flow rate of each measuring point on cross section herein.
3) again particle size diameter is less than to 5mm, density is less than 1.2kg/m
3trace particle by the furnace roof mouth of heat generator model 5, put into furnace roof 7, trace particle, through the entrance measuring point 9 of checker brick 15, is discharged from checker brick 15 outlet at bottoms.Trace particle enters the gas flowfield effect of the air in stove at the uptake 6 from heat generator model 5, makes swirling motion in stove.Now the camera by computing machine 20 is taken the running orbit of trace particle under gas flowfield effect and is stored in computing machine 20.
4) computing machine 20, according to the gas flow rate data of each measuring point and the running orbit of trace particle, is exported furnace gas flow velocity and Flow Field Distribution cloud atlas by image processing software matching.
Certainly, if need simulation on air, can close and close stop valve 4, air is after variable valve 11, electronic pressure measuring apparatus 12, electronic flow-meter 13, by lower stop valve 14, from checker brick 15 outlet at bottoms, entered in stove, furnace air, through the entrance measuring point 9 of checker brick 15, is discharged from the furnace roof mouth of furnace roof 7.Take the method identical with the simulated combustion phase, measure the gas flow rate of each measuring point on interior each cross section of heat generator model 5, the flow velocity of each measuring point is fed back to computing machine 20, and according to the gas flow rate of the coordinate of each measuring point and each measuring point, computing machine 20 obtains Flow Field Distribution cloud atlas by image processing software.
Again trace particle being entered to checker brick 15 by checker brick 15 outlet at bottoms discharges through furnace roof 7 and furnace roof mouth.Trace particle, entering the gas flowfield effect of the air in stove from heat generator model 5 bottoms, is made swirling motion in stove.Now the camera by computing machine 20 is taken the running orbit of trace particle under gas flowfield effect and is stored in computing machine 20.
Last computing machine 20, according to the gas flow rate data of each measuring point and the running orbit of trace particle, is exported furnace gas flow velocity and Flow Field Distribution cloud atlas by image processing software matching.
As another kind of improvement of the present invention, air from fan blower 10 also can replace with other coloured gas, like this, when measuring the gas flow rate of coloured gas each measuring point on each cross section in heat generator model 5, can directly by the camera of computing machine 20, to the turn of coloured gas in stove, take.Saved and again trace particle has been put into the process that stove is demonstrated gas flowfield.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. a top combustion stove flow field simulation device, it is characterized in that: comprise transparent top combustion stove model (5), fan blower (10), data transmitter (18), data sink (19), and the computing machine (20) being connected with described data sink (19), in described heat generator model (5), detecting element is set, described detecting element is connected with data transmitter (18), described fan blower (10) successively with variable valve (11), after electronic pressure measuring apparatus (12) is connected with electronic flow-meter (13), through upper stop valve (4), be connected with described heat generator model (5) with lower stop valve (14) again.
2. top combustion stove flow field simulation device according to claim 1, it is characterized in that: on described variable valve (11), be provided with the valve opening detecting element (1) being connected with described data transmitter (18), on described electronic pressure measuring apparatus (12), be provided with the pressure detecting element (2) being connected with described data transmitter (18), on described electronic flow-meter (13), be provided with the flow detecting element (3) being connected with described data transmitter (18).
3. top combustion stove flow field simulation device according to claim 1, is characterized in that: described heat generator model (5) comprises furnace roof (7), shaft enlarging (8) and checker brick (15).
4. top combustion stove flow field simulation device according to claim 3, it is characterized in that: the entrance measuring point (9) of described checker brick (15) locates to be provided with the detecting element being connected with described data transmitter (18), the outlet measuring point (17) of described checker brick (15) locates to be provided with the detecting element being connected with described data transmitter (18).
5. a top combustion stove flow field simulation method, is characterized in that, comprises the steps:
1), while entering heat generator model (5) from the air of fan blower (10), the pressure of air and flow signal are collected to computing machine (20), determine gas working condition;
2) utilize homalographic multi-point speed measuring method, by the detecting element in heat generator model (5), measured the air velocity at each measuring point place in stove, and the gas flow rate data at each measuring point place are delivered to computing machine (20) through data transmitter (18) and data sink (19);
3) trace particle is put into heat generator model (5), the camera by computing machine (20) is taken the running orbit of trace particle under gas flowfield effect and is stored in computing machine (20);
4) computing machine (20), according to the gas flow rate data of each measuring point and the running orbit of trace particle, is exported furnace gas flow velocity and Flow Field Distribution cloud atlas by image processing software matching.
6. top combustion stove flow field simulation method according to claim 5, is characterized in that, in described homalographic multi-point speed measuring method, definite method of each measuring point is:
In heat generator model (5), get the cross section perpendicular to shaft, on same cross section, get n concentric circles, and each annulus area is equated, then get minute concentric circless such as ray that m bar is crossed the concentric circles center of circle, the intersection point of m bar ray and each circumference is each measuring point of mensurated gas composition flow velocity.
7. top combustion stove flow field simulation method according to claim 6, is characterized in that: the described concentric circles number n getting on same cross section is 5≤n≤100, and the described ray number m that crosses the concentric circles center of circle is 12≤m≤144.
8. top combustion stove flow field simulation method according to claim 5, is characterized in that: the detection data transmission of described data transmitter (18) is wireless or Bluetooth transmission to the mode of data sink (19).
9. top combustion stove flow field simulation method according to claim 5, is characterized in that: the particle size diameter of described trace particle is less than 5mm, and density is less than 1.2kg/m
3.
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| CN110046440A (en) * | 2019-04-22 | 2019-07-23 | 国电联合动力技术有限公司 | Flow field simulation calculation method and device based on CFD database |
| CN113125102A (en) * | 2021-03-24 | 2021-07-16 | 中国空气动力研究与发展中心空天技术研究所 | Equal-area distribution method for 5X 8 measuring points of elliptic-section Mi-character Rake flowmeter |
| CN114414201A (en) * | 2021-12-31 | 2022-04-29 | 浙江大学 | Visual device of celadon kiln internal flow field simulation |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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