CN207880834U - A kind of microminiature swiss roll burner suitable for non-premixed combustion - Google Patents
A kind of microminiature swiss roll burner suitable for non-premixed combustion Download PDFInfo
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- CN207880834U CN207880834U CN201820127305.2U CN201820127305U CN207880834U CN 207880834 U CN207880834 U CN 207880834U CN 201820127305 U CN201820127305 U CN 201820127305U CN 207880834 U CN207880834 U CN 207880834U
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Abstract
The utility model belongs to gaseous diffusion combustion technical field, and specifically disclose a kind of microminiature swiss roll burner suitable for non-premixed combustion, including the burner body and upper cover plate being disposed on the substrate, burner body includes the first combustion chamber, second combustion chamber, first exhaust passage, second exhaust channel, fuel channel and oxidant channel, first combustion chamber and the second entry of combustion chamber are symmetrically distributed in burner centre both sides up and down, outlet is connected with first exhaust passage and second exhaust channel respectively, fuel channel and oxidant channel outlet are symmetrically distributed at left and right sides of burner centre, and it is connected at the heart in the burner, fuel channel, first exhaust passage, oxidant channel and second exhaust channel are spiral shape, and arranged for interval.The utility model has many advantages, such as that good mixing effect, steady combustion range be wide, high combustion efficiency, is suitable for various microminiature thermal photovoltaic systems and heat and power system based on burning, can also be used directly as heat source.
Description
Technical field
The utility model belongs to gaseous diffusion combustion technical field, specially a kind of microminiature suitable for non-premixed combustion
Swiss roll burner is particularly suitable for various microminiature thermal photovoltaic systems and heat and power system based on burning, can also directly make
It is used for heat source.
Background technology
With the fast development of MEMS technology, many microminiature device and system are continued to bring out out, such as micro-satellite, micro-
The microminiatures electronic equipments such as humanoid robot, miniature propulsion system.Currently, the energy source of these equipment is mainly chemical cell,
However the energy density of chemical cell is relatively low, volume and weight is also larger.Carbon HC fuel has for chemical cell
It is higher by tens times of energy density advantage, if the energy density of typical liquid hydrocarbon fuels is about 45MJ/kg, and it is best
The energy density of lithium battery be about 1.2MJ/kg.Therefore, small power plant of the exploitation based on burning has very huge
Application prospect.Researchers have successfully been manufactured that micro- combustion gas turbine, Mini Rotary Engine, micromass culture system, low-grade fever photovoltaic
System and low-grade fever electric system etc., wherein burner are the critical components of microminiature dynamical system.
Whether mixed before entering into the combustion chamber according to fuel and oxidant, burning can be divided into premixed combustion and the combustion of non-premix
It burns.Premixed combustion is sufficiently mixed since fuel and oxidant have been carried out before entering burner, what completely burned needed
In general time is enough, the principal element for influencing its flame holding is radiation loss.For this purpose, researchers propose
A variety of different stable combustion technologies such as heat-circulation structure (for example, swiss roll burner), catalysis burning, bluff body and cavity stabilizer,
Achieve preferable effect.
Since micro-combustor is mainly used in various portable devices, ensure that safety is matter of utmost importance.For
It is dangerous to prevent tempering, it should the preferential combustion system for taking fuel and the non-premix of oxidant.But it thus can bring one
A new problem, i.e. fuel and oxidant mixing unevenness lead to react that insufficient, efficiency of combustion is low and flame instability.It is existing
The non-premix burner structure design having generally uses simple parallel feed channel or Y shape inlet channel, for example, Ju etc.
(Xu B,Ju Y.Studies on non-premixed flame streets in a mesoscale
channel.Proceedings of the Combustion Institute,2009,32(1):1375-1382) and
(Miesse C, Masel R I, Short M, the et al.Diffusion flame instabilities in a such as Miesse
0.75mm non-premixed microburner.Proceedings of the Combustion Institute,2005,
30(2):Both methods 2499-2507) is respectively adopted, they are found that in so-called " flame street " in an experiment, i.e., more
A flammule is along entry of combustion chamber to the phenomenon that exporting discrete distribution, it is clear that this is because fuel and oxidant mixing are not filled
Caused by point；In addition to this, micro diffusion combustor faces the big problem of radiation loss ratio as premixed combustion.
The reason of above several aspects, makes the non-premixed combustion under minute yardstick implement with prodigious difficulty, never too much
Application example.
Utility model content
For the disadvantages described above or Improvement requirement of the prior art, the utility model provides a kind of microminiature swiss roll burning
Switzerland's volume structure is applied in the design of non-premix burner, passes through the concrete arrangement to each channel and combustion chamber by device
And the research and design of structure, it is high to provide wide a kind of good mixing effect, steady combustion range, high combustion efficiency, capacity usage ratio
Non- premix swiss roll burner, has many advantages, such as simple in structure, strong applicability, is suitably adapted for the various microminiature heat based on burning
Photovoltaic system and heat and power system can also be used directly as heat source.
To achieve the above object, the utility model proposes a kind of microminiature swiss roll burnings suitable for non-premixed combustion
Device comprising the burner body being disposed on the substrate and the upper cover plate being arranged above burner body, the burner sheet
Body includes the first combustion chamber, the second combustion chamber, first exhaust passage, second exhaust channel, fuel channel and oxidant channel,
In, the entrance of first combustion chamber and the second combustion chamber is symmetrically distributed in the both sides up and down of burner centre, outlet respectively with
First exhaust passage is connected with second exhaust channel, and the outlet of the fuel channel and oxidant channel is symmetrically distributed in burner
The left and right sides at center, and in the burner at the heart be connected to, the fuel channel, first exhaust passage, oxidant channel and
Second exhaust channel is spiral shape, and arranged for interval.
As it is further preferred that the entrance of first combustion chamber and the second combustion chamber is gradually expanded form structure.
As it is further preferred that the width in the first exhaust passage and second exhaust channel is equal, the fuel is logical
The width of road and oxidant channel is equal, and the width of first combustion chamber and the second combustion chamber is equal, and is more than fuel channel
Width.
As it is further preferred that first combustion chamber, the second combustion chamber, first exhaust passage, second exhaust channel,
Fuel channel and oxidant channel are directly processed acquisition by substrate.
As it is further preferred that entire burner is made of ceramic material or heat-resistance stainless steel.
As it is further preferred that the bottom of the substrate and upper cover plate are slab construction.
In general, mainly have the above technical solutions conceived by the present invention are compared with the prior art, with
Under technological merit：
1. the fuel channel and oxidant channel end opposite direction of the utility model are distributed, the structure that liquidates is formed, can be played just
The mixed effect of step.
2. the gradually expanded form structure of two entry of combustion chamber of the utility model can form recirculating zone, is inhaled and made using the volume of vortex
With the further mixing promoted between fuel and oxidant, while recirculating zone can stablize flame.
3. in Switzerland's volume structure of the utility model, the flow direction of fuel and oxidant is opposite with the flow direction of two strands of flue gases
(that is, reverse flow) can play the role of enhanced heat exchange, to make full use of burning after flue gas heat, it is unburned to preheat
Gas reduces waste-heat rejection, improves flame holding.
4. the utility model can maintain to stablize burning under low-down speed fuel and nominal equivalent proportion, therefore,
There are very extensive wall temperature adjustable range and power output range, wall temperature adjustable range is up to 400K~1250K, efficiency of combustion
Reach 92% or more, even as high as 99% or more.
5. the main thermal output surface (i.e. substrate, upper cover plate) of the utility model is slab construction, it is easy to be bonded various heat
Electrical switching device.
The distribution situation 6. each channel of the utility model is centrosymmetric, reduces difficulty of processing.
In short, the utility model overcomes the deficiencies in the prior art, thermal management technology is not only utilized, reduces exhaust heat waste
It loses, improves capacity usage ratio；And several different physical mechanisms are utilized in heat-circulation structure, reach fuel and oxidant it
Between be sufficiently mixed；Meanwhile also stablizing flame using low regime caused by reflux；Therefore, the utility model can be effective
The flame holding and capacity usage ratio in micro diffusion combustor are improved, various mini systems are widely used in.
Description of the drawings
Fig. 1 is a kind of two-dimensional structure schematic diagram for microminiature swiss roll burner that the utility model embodiment provides；
Fig. 2 is the 3 d effect graph for the burner body that the utility model embodiment provides；
Fig. 3 is the utility model when fuel inlet speed is 3m/s, 1m/s and 0.1m/s, under different name equivalent proportions
Efficiency of combustion；
Fig. 4 is the utility model when fuel inlet speed is 3m/s, 1m/s and 0.1m/s, under different name equivalent proportions
Upper and lower cover plates outside wall surface maximum temperature.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
The microminiature swiss roll burner suitable for non-premixed combustion that the utility model embodiment provides, is in resistance to height
Fuel channel, oxidant channel and two combustion chambers and two exhaust passages, fuel and oxidant are processed on the substrate of temperature
It is passed through respectively by fuel channel and oxidant channel, the heart liquidates in the burner for fuel and oxidizer flow, preliminary to mix
Enter the combustion chamber of both sides afterwards, and further mix and burn in a combustion chamber, the flue gas of burning is then arranged by two respectively
Gas channel is discharged, wherein fuel and oxidizer flow and flue gas reverse flow, is exchanged heat by the partition board between adjacency channel,
Realize that the pre- heat effect to unburned gas, burner materials can be selected such as quartz (main component SiO2), silicon carbide
(SiC), silicon nitride (Si3N4) etc. heat safe ceramic material, if for compared with low velocity burning it is also an option that heat-resistance stainless steel
(SUS316) metal materials such as.
As shown in Figure 1 and Figure 2, micro-combustor provided by the utility model includes the burner sheet being disposed on the substrate
Body and the upper cover plate above burner body, wherein substrate and upper cover plate are slab construction, for burner sheet
Each channel of body and combustion chamber are packaged, the burner body include fuel channel 1, oxidant channel 2, the first combustion chamber 5,
Second combustion chamber 6, first exhaust passage 3 and second exhaust channel 4, the fuel channel 1, oxidant channel 2, the first combustion chamber 5,
Second combustion chamber 6, first exhaust passage 3 and second exhaust channel 4 are directly processed acquisition by baseplate material, such as on substrate directly
It connects and mills out each channel and combustion chamber so that fuel channel 1 and oxidant channel 2, the first combustion chamber 5 and the second combustion chamber 6, the
One exhaust passage 3 and second exhaust channel 4, be centrosymmetric distribution, and fuel channel 1, first exhaust passage 3, oxidation
Agent channel 2, second exhaust channel 4 are spiral shape (can be square spiral, round screw thread etc.), and are separately arranged, with this shape
At Switzerland's volume structure, the air-flow reverse flow in each channel, it is possible thereby to reach good thermal cycle effect, the fuel channel
1 be connected at the end (i.e. outlet end) of the oxidant channel 2 in the burner heart, formed the structure that liquidates, enhanced fuel with
The mixing of oxidant, preliminary mixed gas enter the combustion chamber of both sides.Specifically, two entry of combustion chamber runners are flaring
Shape nozzle arrangements can so form recirculating zone, further promote the mixing between fuel and oxidant, while improving flame stabilization
Property.
Due to the good thermal circulation performance of the utility model, waste-heat rejection is very low, and main heat is by burner
Substrate and upper cover plate export, are very suitable for providing heat source for minisize thermoelectric device or thermal photovoltaic system.Simultaneously as this practicality
Novel that stable flame can be formed under low-down fuel flow rate, therefore, the utility model also is suitable as temperature requirement
Lower microminiature heater.
Specifically, first exhaust passage, second exhaust channel, fuel channel, oxidant channel, the first combustion chamber and
It is separated by heat safe partition board between two combustion chambers are each, which is baseplate material, and each channel and combustion chamber height
Equal, cover board is arranged in top, and first exhaust passage, second exhaust channel, fuel channel and oxidant channel width are equal, preferably
For 1~5mm (if fuel is hydrogen), the width of the first combustion chamber and the second combustion chamber is equal, and is more than the width of fuel channel,
And it is preferably wider 1~5mm than the width of fuel channel.By changing channel height, channel width, block board thickness, cover sheet thickness, leading to
The fillet of road inflection point and channel surround the number of turns, can further improve the mixed effect between fuel and oxidant, thermal cycle is imitated
Fruit and steady fuel efficiency fruit.
It is specific embodiment below：
The present embodiment uses hydrogen for fuel, and air is oxidant, and the width of fuel channel and oxidant channel is 2mm,
The structure of two combustion chambers is identical, and width is 3mm, and two exhaust channel structures are identical, and width is 2mm, combustion chamber and each
The height in channel is 3mm, and the wall thickness of the partition board in combustion chamber and each channel is 1mm, substrate and upper cover plate thickness 1mm, entirely
Combustion chamber dimensions are 41mm × 41mm × 5mm.Entire burner (i.e. substrate, each channel, each combustion chamber and upper cover plate) is equal
It is made of SUS316 materials, the density, specific heat capacity, thermal coefficient and normal emittance under room temperature are respectively 7980kg/m3、
502J/(kg·K)、16.2W/(m2K) and 0.65, using general CFD software for calculation Fluent 6.3, to burner not
Numerical simulation is carried out with the combustion characteristics under operating mode, as a result as shown in Figure 3 and Figure 4, wherein abscissa is ideal mixing situation
The nominal equivalent proportion of lower fuel/air mixture.
Fig. 3 give the utility model respectively the case where fuel inlet speed is 3m/s, 1m/s and 0.1m/s when, it is different
Efficiency of combustion under nominal equivalent proportion.From Fig. 3, it is apparent that the utility model burns under the fuel inlet speed of 1m/s
Efficiency is up to 99%, also has 92% or more efficiency of combustion under 3m/s and 0.1m/s fuel inlet speed, and by sky
After the adjustment of gas inlet velocity, 98% or more efficiency of combustion can reach.Fig. 4 give the utility model respectively fuel into
When the case where mouth speed is 3m/s, 1m/s and 0.1m/s, the upper and lower cover plates outside wall surface maximum temperature under different name equivalent proportions.From
Fig. 4, it is apparent that first, the utility model can make flame still stablize in the wall temperature of 400K or so burning (fuel into
When mouth speed 0.1m/s), this operating mode is suitably applied various heating devices；Secondly, by increasing fuel inlet speed, this practicality
Novel China and foreign countries' wall surface temperature can rise to the even higher temperature of 900K, and in Qiu and Hayden et al. (Qiu K, Hayden
A C S.Integrated Thermoelectric Generator and Application to Self-Powered
Heating Systems.International Conference on Thermoelectrics.IEEE,2006:198-
203) in the thermoelectric device designed, the temperature of burner wall surface is within the scope of 800K~1000K, since excessively high wall temperature can be to wall
Plane materiel material generates harmful effect, they also suggest that wall temperature is more preferably less than 1300K~1550K in thermoelectric device under study for action.Thus
As it can be seen that the utility model in the fuel inlet speed operating mode of 1m/s, can be suitable for various heat and power systems very well, and in fuel
When inlet velocity is 3m/s, outer wall temperature can reach 1200K, this operating mode is suitable for various thermal photovoltaic systems.Due to this practicality
Novel good mixed effect and thermal cycle effect can realize the wide scope regulation and control to wall temperature, can be very good to meet various
The wall temperature demand of thermoelectricity, thermal photovoltaic and heater, while the thermal output surface of the utility model is disk construction, is easy to paste
Close other microminiature devices.
The fuel channel and oxidant channel of the utility model separately arrange that reverse flow is fired with two exhaust passages
Material and oxidant are preheated by the high-temperature gas in exhaust passage, are carried out at the heart in the burner pair in the way for leading to combustion chamber
Punching mixing, then respectively enters and burns in the combustion chamber of both sides, can effectively realize being sufficiently mixed for fuel and oxidant
With stablize flame, obtain higher efficiency of combustion and very wide temperature modification scope, be widely used in various microminiature dynamical systems
System.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of microminiature swiss roll burner suitable for non-premixed combustion, which is characterized in that including what is be disposed on the substrate
Burner body and the upper cover plate being arranged above burner body, the burner body include the first combustion chamber (5), second
Combustion chamber (6), first exhaust passage (3), second exhaust channel (4), fuel channel (1) and oxidant channel (2), wherein institute
The entrance for stating the first combustion chamber (5) and the second combustion chamber (6) is symmetrically distributed in the both sides up and down of burner centre, outlet respectively with
First exhaust passage (3) is connected with second exhaust channel (4), and the outlet of the fuel channel (1) and oxidant channel (2) is symmetrical
It is distributed in the left and right sides of burner centre, and is connected at the heart in the burner, the fuel channel (1), first exhaust are logical
Road (3), oxidant channel (2) and second exhaust channel (4) are spiral shape, and arranged for interval.
2. being suitable for the microminiature swiss roll burner of non-premixed combustion as described in claim 1, which is characterized in that described the
The entrance of one combustion chamber (5) and the second combustion chamber (6) is gradually expanded form structure.
3. being suitable for the microminiature swiss roll burner of non-premixed combustion as claimed in claim 1 or 2, which is characterized in that institute
The width for stating first exhaust passage (3) and second exhaust channel (4) is equal, the fuel channel (1) and oxidant channel (2)
Width is equal, and the width of first combustion chamber (5) and the second combustion chamber (6) is equal, and more than the width of fuel channel.
4. being suitable for the microminiature swiss roll burner of non-premixed combustion as described in claim 1, which is characterized in that described the
One combustion chamber (5), the second combustion chamber (6), first exhaust passage (3), second exhaust channel (4), fuel channel (1) and oxidant
Channel (2) is directly processed acquisition by substrate.
5. being suitable for the microminiature swiss roll burner of non-premixed combustion as claimed in claim 4, which is characterized in that entire combustion
Burner is made of ceramic material or heat-resistance stainless steel.
6. being suitable for the microminiature swiss roll burner of non-premixed combustion as described in claim 1, which is characterized in that the base
The bottom of plate and upper cover plate are slab construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820127305.2U CN207880834U (en) | 2018-01-25 | 2018-01-25 | A kind of microminiature swiss roll burner suitable for non-premixed combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820127305.2U CN207880834U (en) | 2018-01-25 | 2018-01-25 | A kind of microminiature swiss roll burner suitable for non-premixed combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207880834U true CN207880834U (en) | 2018-09-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820127305.2U Withdrawn - After Issue CN207880834U (en) | 2018-01-25 | 2018-01-25 | A kind of microminiature swiss roll burner suitable for non-premixed combustion |
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| Country | Link |
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| CN (1) | CN207880834U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131670A (en) * | 2018-01-25 | 2018-06-08 | 华中科技大学 | A kind of microminiature swiss roll burner suitable for non-premixed combustion |
| CN111623349A (en) * | 2020-05-27 | 2020-09-04 | 华中科技大学 | Double-cavity annular micro-combustor based on Swiss roll structure |
-
2018
- 2018-01-25 CN CN201820127305.2U patent/CN207880834U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131670A (en) * | 2018-01-25 | 2018-06-08 | 华中科技大学 | A kind of microminiature swiss roll burner suitable for non-premixed combustion |
| CN108131670B (en) * | 2018-01-25 | 2023-09-29 | 华中科技大学 | Microminiature Swiss coil burner suitable for non-premixed combustion |
| CN111623349A (en) * | 2020-05-27 | 2020-09-04 | 华中科技大学 | Double-cavity annular micro-combustor based on Swiss roll structure |
| CN111623349B (en) * | 2020-05-27 | 2021-07-27 | 华中科技大学 | Double-cavity annular micro-combustor based on Swiss roll structure |
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