Experimental apparatus and combustion method for nano-fuel combustion

Abstract

This disclosure relates to an experimental apparatus for the combustion of nano-fuel, comprising a fuel supply mechanism, a dispersion mechanism, a flat-flame burner, and a pneumatic mechanism. The fuel supply mechanism is suitable for storing nano-fuel; the dispersion mechanism, disposed within the fuel supply mechanism, is suitable for dispersing and maintaining the nano-fuel in a dispersed state; the flat-flame burner, connected to the fuel supply mechanism, is suitable for igniting the nano-fuel input by the fuel supply mechanism; and the pneumatic mechanism, connected to the fuel supply mechanism, is suitable for supplying carrier gas to the fuel supply mechanism to create an oxygen-free environment and to provide pressure to the nano-fuel in the fuel supply mechanism to transport the nano-fuel from the fuel supply mechanism to the flat-flame burner.

Description

Technical Field

[0001] This invention relates to the field of nano-fuel combustion testing technology, specifically to an experimental apparatus and combustion method for nano-fuel combustion. Background Technology

[0002] With the development of nanomaterials, nano-fuels prepared using nanoparticles can effectively improve the power density of rapid combustion in diesel engines. Furthermore, due to their small particle size, nano-sized particles will not damage the fuel supply system or combustion chamber throughout the entire operation of the diesel engine; their excellent surface effects and thermal conductivity can improve the atomization and evaporation process during fuel injection. Appropriate addition of nanoparticles to fuel can improve in-cylinder combustion conditions and increase the fuel-air mixture and combustion rate without altering the original engine structure. Therefore, conducting spray combustion experiments on nano-diesel to explore its spray fragmentation and combustion characteristics is crucial for elucidating the mechanism of action of nanoparticle additives in diesel fuel.

[0003] Existing experimental devices for nano-diesel combustion often suffer from several problems over time. First, the nano-diesel comes into contact with air during operation, making it easy for the nano-diesel, which is made from nano-sized particles of active metals (such as iron and aluminum), to be oxidized by the air. This makes it difficult for the experimental results to reflect the actual combustion process. Second, the nano-diesel in the experimental device is difficult to maintain a uniformly dispersed state for a long time, which leads to errors in the experimental results. Summary of the Invention

[0004] To address at least one technical problem in the prior art and other aspects, this disclosure provides an experimental apparatus for nano-fuel combustion that at least partially solves at least one of the aforementioned technical problems.

[0005] One aspect of this disclosure provides an experimental apparatus for the combustion of nano-fuel, including a fuel supply mechanism, a dispersion mechanism, a flat-flame burner, and a pneumatic mechanism. The fuel supply mechanism is suitable for storing nano-fuel; the dispersion mechanism, disposed within the fuel supply mechanism, is suitable for dispersing and maintaining the nano-fuel in a dispersed state; the flat-flame burner, connected to the fuel supply mechanism, is suitable for igniting the nano-fuel input by the fuel supply mechanism; and the pneumatic mechanism, connected to the fuel supply mechanism, is suitable for supplying carrier gas to the fuel supply mechanism to create an oxygen-free environment and to provide pressure to the nano-fuel in the fuel supply mechanism to transport the nano-fuel from the fuel supply mechanism to the flat-flame burner.

[0006] According to embodiments of this disclosure, the fuel supply mechanism includes an inner cylinder, an outer cylinder, and an ultrasonic oscillator. The inner cylinder defines an inner cavity suitable for storing nano-fuel; the outer cylinder is sleeved outside the inner cylinder and defines an outer cavity suitable for storing water; the ultrasonic oscillator is disposed in the outer cavity below the outer cylinder and is used to ultrasonically oscillate the water within the outer cavity, so that the nano-fuel in the inner cavity is vibrated by an ultrasonic water bath.

[0007] According to embodiments of this disclosure, the fuel supply mechanism further includes an end cap adapted to cover the upper end of the inner cavity to form a seal within the inner cavity.

[0008] According to embodiments of this disclosure, the above-mentioned dispersing mechanism includes a stirrer suitable for stirring nano-fuel in the inner cavity.

[0009] According to an embodiment of this disclosure, the stirrer includes a stirring rod and a motor. The stirring rod is configured to pass through an end cap and extend into an inner cavity; the motor is disposed at the upper end of the end cap and rotatably connected to the stirring rod to drive the stirring rod to rotate.

[0010] According to an embodiment of the present disclosure, the pneumatic mechanism includes a carrier gas tank and a pressure reducing valve. The carrier gas tank is suitable for storing carrier gas and is in communication with the inner cavity. The first pressure reducing valve is disposed between the carrier gas tank and the inner cavity and is suitable for adjusting the pressure of the carrier gas tank delivering carrier gas to the inner cavity.

[0011] According to embodiments of this disclosure, the above-mentioned test apparatus further includes a gas supply mechanism adapted to supply gas and auxiliary gas to the flat flame burner so that the flat flame burner generates a planar flame by igniting the gas.

[0012] According to embodiments of this disclosure, the aforementioned flat flame burner includes: a burner body, a gas inlet, and a combustion plane communicating with the gas inlet, suitable for containing the combustion of gas and nano fuel oil; a plurality of parallel, spaced-apart capillaries arranged between the gas inlet and the combustion plane, suitable for delivering gas to the combustion plane; the burner body also includes an auxiliary gas inlet communicating with the gap between the capillaries, suitable for delivering auxiliary gas to the combustion plane of the flat flame burner; and an oil delivery pipe disposed in the middle of the burner body, communicating with the inner cavity, suitable for delivering nano fuel oil to the combustion plane of the flat flame burner.

[0013] According to embodiments of this disclosure, the gas supply mechanism described above is also suitable for supplying a co-flow gas to a flat flame burner and for forming a co-flow gas around a planar flame to block external airflow.

[0014] One aspect of this disclosure provides a combustion method according to the above-described experimental apparatus, comprising:

[0015] The fuel supply mechanism is vented to an oxygen-free state by a pneumatic mechanism, and nano fuel is added to the fuel supply mechanism. The nano fuel is then dispersed by a dispersing mechanism.

[0016] Gas and oxidizing agent are introduced into a flat-flame burner, which ignites the gas to form a planar flame; and

[0017] Carrier gas is introduced into the fuel supply mechanism via a pneumatic mechanism, which allows the nano fuel to be delivered from the fuel supply mechanism to the flat flame burner and ignited by the flat flame.

[0018] According to the experimental apparatus for the combustion of nano-fuel disclosed herein, by setting a dispersing mechanism in the fuel supply mechanism, the nano-fuel is always kept in a dispersed state. By setting a pneumatic mechanism to deliver carrier gas to the fuel supply mechanism to vent the air in the fuel supply mechanism, the nano-fuel is always in an oxygen-free environment, thereby reducing the degree of oxidation of nanoparticles in the combustion experimental system. This can truly reflect the combustion effect of nano-fuel and effectively reduce experimental errors. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of an experimental apparatus for nano-fuel combustion according to an illustrative embodiment of the present disclosure;

[0020] Figure 2 This is a cross-sectional view of a fuel supply mechanism according to an illustrative embodiment of the present disclosure;

[0021] Figure 3 This is a top view of a flat flame burner according to an illustrative embodiment of the present disclosure;

[0022] Figure 4 This is a cross-sectional view of a flat flame burner according to an illustrative embodiment of the present disclosure.

[0023] Figure Labels

[0024] 1. Fuel supply organizations;

[0025] 11. Outer cylinder;

[0026] 111. Water inlet pipe;

[0027] 112. Water outlet pipe;

[0028] 12. Inner cylinder;

[0029] 121. Liquid inlet pipe;

[0030] 122. Discharge pipe;

[0031] 123. Third flow controller;

[0032] 124. Liquid flow meter;

[0033] 13. Cover plate;

[0034] 131. Intake pipe;

[0035] 14. Mixer;

[0036] 141. Stirring rod;

[0037] 142. Electric motor;

[0038] 143. Fixtures;

[0039] 144. Main gear;

[0040] 145. Rotate the gear;

[0041] 146. Bracket;

[0042] 15. Ultrasonic oscillator;

[0043] 16. Controller;

[0044] 2. Flat flame burner;

[0045] 21. Capillary tube;

[0046] 22. Gas inlet;

[0047] 23. Combustion-supporting air inlet;

[0048] 24. Accompanying air inlet;

[0049] 25. First porous dielectric layer;

[0050] 26. Second porous dielectric layer;

[0051] 27. Oil pipelines;

[0052] 28. Combustion plane;

[0053] 3. Pneumatic mechanism;

[0054] 31. Carrier gas tank;

[0055] 32. First pressure reducing valve;

[0056] 33. First pressure gauge;

[0057] 34. First flow controller;

[0058] 35. First gas flow meter;

[0059] 4. Gas supply organizations;

[0060] 41. Gas cylinders;

[0061] 42. Combustion-supporting gas cylinder;

[0062] 43. Accompanying gas cylinder;

[0063] 44. Second pressure reducing valve;

[0064] 45. Second pressure gauge;

[0065] 46. ​​Second flow controller;

[0066] 47. Second gas flow meter. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0068] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0069] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0070] When using expressions such as "at least one of A, B, and C", they should generally be interpreted in accordance with the meaning that is commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.).

[0071] Figure 1 This is an overall structural diagram of an experimental apparatus for nano-fuel combustion according to an illustrative embodiment of the present disclosure.

[0072] The experimental apparatus for the combustion of nano-fuel according to this disclosure includes a fuel supply mechanism 1, a dispersion mechanism, a flat flame burner 2, and a pneumatic mechanism 3. The fuel supply mechanism 1 is suitable for storing nano-fuel; the dispersion mechanism, disposed within the fuel supply mechanism 1, is suitable for dispersing and maintaining the nano-fuel in a dispersed state; the flat flame burner 2, connected to the fuel supply mechanism, is suitable for igniting the nano-fuel input from the fuel supply mechanism 1; and the pneumatic mechanism 3, connected to the fuel supply mechanism 1, is suitable for supplying carrier gas to the fuel supply mechanism 1 to create an oxygen-free environment and for providing pressure to the nano-fuel in the fuel supply mechanism 1 to transport the nano-fuel from the fuel supply mechanism to the flat flame burner 2.

[0073] In this implementation, by setting a dispersing mechanism in the fuel supply mechanism 1, the nano fuel is always kept in a dispersed state. By setting a pneumatic mechanism 3 to deliver carrier gas to the fuel supply mechanism 1 to vent the air in the fuel supply mechanism 1, the nano fuel is always in an oxygen-free environment. This reduces the degree of oxidation of nanoparticles in the nano fuel in the combustion test system, which can truly reflect the combustion effect of the nano fuel and thus effectively reduce experimental errors.

[0074] According to embodiments of this disclosure, a gas supply mechanism 4 is also included, adapted to supply gas and auxiliary gas to the flat flame burner 2 so that the flat flame burner 2 generates a planar flame by igniting the gas.

[0075] In one illustrative embodiment, such as Figure 1 As shown, the gas supply mechanism 4 includes a gas cylinder 41 and an auxiliary gas cylinder 42. The gas cylinder 41 is used to supply gas to the flat flame burner 2, and the auxiliary gas cylinder 42 is used to supply auxiliary gas to the flat flame burner 2. A second pressure reducing valve 44, a second pressure gauge 45, a second flow controller 46, and a second gas flow meter 47 are sequentially installed between the gas cylinder 41 and the flat flame burner 2 to control and monitor the gas supply from the gas cylinder 41 and the auxiliary gas cylinder 42 to the flat flame burner 2, as well as the pressure and flow rate of the auxiliary gas.

[0076] In one illustrative embodiment, the fuel gas includes, but is not limited to, methane, ethane, propane, coal gas, liquefied petroleum gas, hydrogen, etc.; the combustion-supporting gas includes air, oxygen, etc.

[0077] According to embodiments of this disclosure, the gas supply mechanism 4 is also adapted to supply a co-flow gas to the flat flame burner 2, and to form a co-flow gas around the flat flame to block external airflow.

[0078] In this implementation, by forming a co-flow around the planar flame, the influence of the surrounding airflow on the flame can be prevented, thereby ensuring the stability of the combustion flame.

[0079] In one illustrative embodiment, such as Figure 1 As shown, the gas supply mechanism 4 also includes a tracing gas tank 43, which is suitable for supplying tracing gas to the flat flame burner 2. A second pressure reducing valve 44, a second pressure gauge 45, a second flow controller 46, and a second gas flow meter 47 are sequentially arranged between the tracing gas tank 43 and the flat flame burner 2 to control the pressure and flow rate of the tracing gas supplied from the tracing gas tank 43 to the flat flame burner 2. The tracing gas can be an inert gas, including but not limited to nitrogen and helium.

[0080] Figure 2 This is a cross-sectional view of a fuel supply mechanism 1 according to an illustrative embodiment of the present disclosure.

[0081] According to embodiments of this disclosure, such as Figure 1 As shown, the fuel supply mechanism 1 includes an inner cylinder 12, an outer cylinder 11, and an ultrasonic oscillator 15. The inner cylinder 12 defines an inner cavity suitable for storing nano-fuel; the outer cylinder 11 is sleeved outside the inner cylinder 12, defining an outer cavity suitable for storing water; the ultrasonic oscillator 15 is disposed in the outer cavity below the outer cylinder 11, and is used to ultrasonically oscillate the water in the outer cavity, so that the nano-fuel in the inner cavity is vibrated by an ultrasonic water bath.

[0082] In this embodiment, by using an ultrasonic oscillator 15 located in the outer cavity to perform ultrasonic water bath oscillation on the nano-fuel stored in the inner cavity, the interaction between the surfaces of nanoparticles in the nano-fuel can be interfered with, and the aggregation of particles in the base liquid medium can be weakened, thereby making it difficult for nanoparticles of nano crude oil to aggregate, and further maintaining the nano-fuel in a uniformly dispersed state.

[0083] According to embodiments of the present disclosure, the fuel supply mechanism 1 further includes an end cap adapted to cover the upper end of the inner cavity to form a seal within the inner cavity.

[0084] In this implementation, the end cap creates a sealed environment in the inner cavity. After the pneumatic mechanism 3 delivers carrier gas to purge the residual air from the inner cavity, the inner cavity can be kept in an oxygen-free state. This can prevent the nanoscale particles made of active metals (such as iron and aluminum) from being oxidized, thus affecting the accuracy of the experiment.

[0085] In one illustrative embodiment, the cover plate 13 and the inner cylinder 12, as well as the inner cylinder 12 and the outer cylinder 11, are detachably installed together, including but not limited to using a threaded structure, or can be molded into an integral structure.

[0086] In one illustrative embodiment, such as Figure 2As shown, the fuel supply mechanism 1 also includes a water inlet pipe 111 and a water outlet pipe 112 communicating with the outer cavity, and an air inlet pipe 131, a liquid inlet pipe 121, and a liquid outlet pipe 122 communicating with the inner cavity. Specifically, the water inlet pipe 111 and the water outlet pipe 112 are located on the side wall of the outer cylinder 11, suitable for inputting and discharging water required for ultrasonic water bath oscillation into the outer cavity. The air inlet pipe 131 is located on the end cap, connecting the carrier gas tank 31 and the inner cavity. The liquid inlet pipe 121 and the liquid outlet pipe 122 penetrate the side walls of the outer cylinder 11 and the inner cylinder 12. The liquid inlet pipe 121 can be used to input nano-fuel from the outside; the liquid outlet pipe 122 is used to connect the inner cavity and the flat flame burner 2. The liquid outlet pipe 122, in response to the pressure of the carrier gas output by the pneumatic mechanism 3, delivers nano-crude oil to the flat flame burner 2.

[0087] In one illustrative embodiment, a third flow controller 123 and a liquid flow meter 124 are also provided between the liquid outlet pipe 122 and the flat flame burner 2 for controlling and monitoring the flow rate of the output nano fuel.

[0088] According to embodiments of this disclosure, the dispersing mechanism includes a stirrer 14 adapted to stir the nano-fuel in the inner cavity.

[0089] In this embodiment, the stirrer 14 mechanically stirs the nano-fuel, which can apply mechanical external forces such as shear force and impact force to the fuel containing nanoparticles, thereby enabling the nanoparticles to be uniformly dispersed in the liquid medium.

[0090] According to an embodiment of the present disclosure, the stirrer 14 includes a stirring rod 141 and a motor 142. The stirring rod 141 is configured to pass through the end cap and extend into the inner cavity; the motor 142 is disposed at the upper end of the end cap and is rotatably connected to the stirring rod 141 to drive the stirring rod 141 to rotate.

[0091] In an illustrative implementation, such as Figure 2 As shown, the stirrer 14 employs mechanical stirring. Specifically, the stirring rod 141 is inserted into the inner cavity through the center of the cover plate 13. A clamp 143 is provided at the junction of the stirring rod 141 and the cover plate 13. The clamp 143 consists of a bearing and a bearing seat for fixing the bearing, allowing the stirring rod 141 to rotate smoothly. The stirring rod 141 is connected to a rotating gear 145 at the top of the cover plate 13. The motor 142 is mounted on a bracket fixed to the cover plate 13 and is connected to a main gear 144. The main gear 144 and the rotating gear 145 are meshed at 90°. By starting the motor 142, the gear is driven to rotate, thereby driving the stirring rod 141 to stir the nano-fuel in the inner cavity.

[0092] In one illustrative embodiment, the stirrer 14 can also be magnetically stirred, by setting a rotor in the inner cavity and setting a magnet on the end cover to control the rotation of the rotor to achieve stirring.

[0093] In one illustrative embodiment, such as Figure 1 As shown, the fuel supply mechanism 1 also includes a controller 16, which is fixed to the top of the cover plate 13, for example, fixed to the motor 142 bracket 146, and connected to the motor 142 and the ultrasonic oscillator 15 respectively, to control the opening and closing of the stirrer 14 and the ultrasonic oscillator 15.

[0094] According to an embodiment of the present disclosure, the pneumatic mechanism 3 includes a carrier gas tank 31 and a pressure reducing valve. The carrier gas tank 31 is suitable for storing carrier gas and is in communication with the inner cavity. The first pressure reducing valve 32 is disposed between the carrier gas tank 31 and the inner cavity and is suitable for adjusting the pressure of the carrier gas tank 31 delivering carrier gas to the inner cavity.

[0095] In this embodiment, the inner cavity is kept in an oxygen-free environment by introducing carrier gas into it to purge residual gas. After fuel is added to the inner cavity, the nano-fuel in the inner cavity can be delivered to the flat flame burner 2 by adjusting the pressure of the first pressure reducing valve 32 through the pressure of the carrier gas.

[0096] In one illustrative embodiment, a first pressure gauge 33, a first flow controller 34, and a first gas flow meter 35 are further disposed between the carrier gas tank 31 and the inner cavity to control the pressure and flow rate of the carrier gas input from the carrier gas tank 31 into the inner cavity. The carrier gas may be an inert gas, including but not limited to nitrogen or helium.

[0097] Figure 3 This is a top view of a flat flame burner 2 according to an illustrative embodiment of the present disclosure.

[0098] According to an embodiment of this disclosure, the flat flame burner 2 includes a burner body, a gas inlet 22, and a combustion plane 28 connected to the gas inlet 22, suitable for containing gas and nano fuel oil for combustion; a plurality of parallel, spaced-apart capillaries 21 arranged between the gas inlet 22 and the combustion plane 28, suitable for delivering gas to the combustion plane 28; the burner body also includes an auxiliary gas inlet 23, connected to the gap between the capillaries 21, suitable for delivering auxiliary gas to the combustion plane 28 of the flat flame burner 2; and an oil delivery pipe 27 disposed in the middle of the burner body, the oil delivery pipe 27 being connected to the inner cavity, suitable for delivering nano fuel oil to the combustion plane 28 of the flat flame burner 2.

[0099] In this embodiment, the gas is introduced into the combustion plane 28 through the capillary tube 21, and the gaps between the capillary tubes 21 introduce the combustion-supporting gas into the combustion plane 28 to ignite the flat flame burner 2. Multiple closely arranged blown-out diffusion flames can be formed on the combustion plane 28 of the flat flame burner 2 and further combined to form a planar flame. The nano fuel is introduced into the combustion plane 28 through the oil supply pipe 27, so that the nano fuel sprayed from the oil supply pipe 27 is ignited by the planar flame.

[0100] In one illustrative embodiment, such as Figure 3 As shown, the burner body contains a gas combustion passage, an auxiliary combustion passage, and a follow-up gas passage. The gas combustion passage is located in the center of the burner body and consists of multiple parallel, spaced-apart capillary tubes 21; the auxiliary combustion passage consists of the gaps between the capillary tubes 21. The follow-up gas passage surrounds the gas combustion passage and the auxiliary combustion passage. The upper surface of the square array formed by the multiple parallel, spaced-apart capillary tubes 21 forms the combustion plane 28.

[0101] In one illustrative embodiment, such as Figure 3 As shown, four gas inlets 22, four auxiliary gas inlets 23, and four accompanying gas inlets 24 are provided, which are respectively located in the four directions of the gas passage, auxiliary gas passage, and accompanying gas passage, so that the gas and auxiliary gas are evenly delivered to the combustion plane 28, and the accompanying gas is evenly delivered to the periphery of the combustion plane 28.

[0102] Figure 4 This is a cross-sectional view of a flat flame burner 2 according to an illustrative embodiment of the present disclosure.

[0103] In one illustrative embodiment, such as Figure 4 As shown, the gas inlet 22 is located at the bottom of the burner body; the auxiliary gas inlet 23 is located above the inlet of the capillary tube 21 on the burner body and communicates with the gap between the capillary tube 21. The accompanying gas inlet 24 is located on the accompanying gas passage of the burner body.

[0104] In one illustrative embodiment, such as Figure 4 As shown, the burner body also includes a first porous media layer 25 and a second porous media layer 26. Specifically, the second porous media layer 26 is disposed between the capillary tube 21 and the gas inlet 22, and the first porous media layer 25 is disposed between the accompanying gas inlet 24 and the combustion plane 28. This allows the gas to be rectified by the second porous media layer 26 before being introduced into the inlet of the capillary tube 21, and the accompanying gas to be rectified by the first porous media layer 25 before being introduced into the combustion plane 28.

[0105] One aspect of this disclosure provides a combustion method according to the above-described experimental apparatus, comprising:

[0106] S110 uses pneumatic mechanism 3 to discharge fuel supply mechanism 1 to an oxygen-free state, adds nano fuel to fuel supply mechanism 1, and uses dispersing mechanism to make nano fuel dispersed.

[0107] S210 inputs fuel gas and combustion-supporting gas into the flat flame burner 2, and the flat flame burner 2 ignites the fuel gas to form a planar flame; and

[0108] S310 introduces carrier gas into the fuel supply mechanism 1 through the pneumatic mechanism 3, so that the nano fuel is delivered from the fuel supply mechanism 1 to the flat flame burner 2 and ignited by the flat flame.

[0109] In one illustrative embodiment, step S110 further includes,

[0110] S111 Add an appropriate amount of water to the outer cavity of the fuel supply mechanism 1; the height of the water added to the outer cavity should be greater than the height of the nano fuel in the inner cavity.

[0111] S112 turns on the stirrer 14 through the controller 16; the stirrer 14 thoroughly stirs the nano fuel in the inner cavity, so that the nano particles are evenly dispersed in the nano fuel.

[0112] S113 activates the ultrasonic oscillator 15 via the controller 16 to perform ultrasonic water bath oscillation on the nano fuel in the inner cavity.

[0113] In one illustrative embodiment, step S210 further includes,

[0114] S211 opens the combustion gas cylinder 42, introduces the combustion gas into the combustion gas inlet 23 of the flat flame burner 2, and delivers it to the combustion plane 28.

[0115] S212 opens the gas cylinder 41, introduces the gas into the gas inlet of the flat flame burner 2 and delivers it to the combustion plane 28, ignites it, and forms a flat flame on the combustion plane 28.

[0116] S213 opens the accompaniment gas tank 43, introduces the accompaniment gas into the accompaniment gas inlet of the flat flame burner 2, and delivers it to the combustion plane 28.

[0117] In one illustrative embodiment, step S310 further includes,

[0118] Open the carrier gas tank 31 and adjust the carrier gas to a suitable pressure through the first pressure reducing valve 32. Use the pressure of the carrier gas to deliver the nano fuel in the inner cavity to the oil supply pipe 27 of the flat flame burner 2. The nano fuel is injected into the combustion plane 28 through the oil supply pipe 27 and ignited by the plane flame.

[0119] The experimental apparatus and combustion method for nano-fuel combustion provided in this disclosure maintain the nano-fuel in a uniformly dispersed state through ultrasonic water bath oscillation and mechanical stirring. Inert gases such as nitrogen are used as carrier gases to deliver the nano-fuel to the flat flame burner, avoiding contact between the fuel and air and reducing the degree of oxidation of nanoparticles in the combustion experimental system. This reduces experimental errors and allows for better observation of the spray diffusion and combustion characteristics of the nano-fuel.

[0120] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0121] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. An experimental apparatus for nano-fuel combustion, characterized in that, include, Fuel supply mechanism (1), suitable for storing nano fuel; A dispersing mechanism is provided in the fuel supply mechanism (1) and is suitable for dispersing the nano fuel and maintaining its dispersed state. A flat flame burner (2), connected to the fuel supply mechanism (1), is adapted to ignite the nano fuel supplied by the fuel supply mechanism (1); and The pneumatic mechanism (3) is connected to the fuel supply mechanism (1) and is adapted to supply carrier gas to the fuel supply mechanism (1) so that the fuel supply mechanism (1) is in an oxygen-free state and to provide pressure to the nano fuel in the fuel supply mechanism (1) to deliver the nano fuel from the fuel supply mechanism to the flat flame burner (2).

2. The experimental apparatus according to claim 1, characterized in that, The fuel supply mechanism (1) includes, Inner cylinder (12), the inner cylinder (12) defining an inner cavity suitable for storing nano fuel; An outer cylinder (11) is fitted over the outer side of the inner cylinder (12) and defines an outer cavity suitable for storing water between the outer cylinder (12) and the inner cylinder (12); and An ultrasonic oscillator (15) is disposed in the outer cavity below the outer cylinder (11) and is adapted to ultrasonically oscillate the water in the outer cavity so that the nano fuel in the inner cavity is oscillated by an ultrasonic water bath.

3. The experimental apparatus according to claim 2, characterized in that, The fuel supply mechanism (1) also includes an end cap (13) adapted to cover the upper end of the inner cavity to form a seal in the inner cavity.

4. The experimental apparatus according to claim 3, characterized in that, The dispersing mechanism includes a stirrer (14) adapted to stir the nano-fuel in the inner cavity.

5. The experimental apparatus according to claim 4, characterized in that, The stirrer (14) includes, The stirring rod (141) is configured to penetrate the end cap (13) and extend into the inner cavity; as well as A motor (142) is located at the upper end of the end cap (13) and is rotatably connected to the stirring rod (141) to drive the stirring rod (141) to rotate.

6. The experimental apparatus according to claim 3, characterized in that, The pneumatic mechanism (3) includes, A carrier gas tank (31) is used to store the carrier gas and is in communication with the inner cavity; as well as A first pressure reducing valve (32) is disposed between the carrier gas tank (31) and the inner cavity, and is adapted to regulate the pressure of the carrier gas delivered from the carrier gas tank (31) to the inner cavity.

7. The experimental apparatus according to any one of claims 2-6, characterized in that, It also includes, The gas supply mechanism (4) is adapted to supply gas and auxiliary gas to the flat flame burner (2) so that the flat flame burner (2) generates a planar flame by igniting the gas.

8. The experimental apparatus according to claim 7, characterized in that, The flat flame burner (2) includes, The burner body is provided with a gas inlet (22) and a combustion surface (28) connected to the gas inlet (22), which is suitable for accommodating the combustion of the gas and the nano fuel; Multiple parallel, spaced-apart capillaries (21) are arranged between the gas inlet (22) and the combustion plane (28) to deliver the gas to the combustion plane (28). The burner body is also equipped with a combustion gas inlet (23), which communicates with the gap between the capillary tube (21) and the combustion gas, and is suitable for conveying the combustion gas to the combustion plane (28) of the flat flame burner (2); and An oil delivery pipe (27) is disposed in the middle of the burner body. The oil delivery pipe (27) is connected to the inner cavity and is suitable for delivering the nano fuel to the combustion plane (28) of the flat flame burner (2).

9. The experimental apparatus according to claim 7, characterized in that, The gas supply mechanism (4) is also adapted to supply a co-flow gas to the flat flame burner (2) to form a co-flow gas around the flat flame and block external airflow.

10. A combustion method for the experimental apparatus according to any one of claims 1-9, characterized in that, include, The fuel supply mechanism is vented to an oxygen-free state by a pneumatic mechanism, and nano fuel is added to the fuel supply mechanism. The nano fuel is then dispersed by a dispersing mechanism. Gas and combustion-supporting gas are input into a flat flame burner, and the gas is ignited by the flat flame burner to form a planar flame. as well as Carrier gas is introduced into the fuel supply mechanism through the pneumatic mechanism, so that the nano fuel is delivered from the fuel supply mechanism to the flat flame burner and ignited by the flat flame.

Images