An apparatus and method for generating multi-channel flow with equal distribution

Abstract

This invention discloses an equal-volume distribution multi-channel generation device and method, belonging to the field of aerodynamic design technology. The latex membrane airway structure and size of this equal-volume distribution multi-channel generation device are identical to the target airflow distribution airway to be designed. The flexible airway includes an inlet channel and multiple outlet channels. The inlet channel is sealed to a first inlet; the multiple outlet channels are sealed to multiple corresponding first outlets; the output pipe of a first liquid injection device is connected to the first inlet and the third inlet, and the first outlet pipe is connected to the liquid inlet of the first liquid injection device; the output pipe of a second liquid injection device is connected to the second inlet, and the second outlet pipe is connected to the liquid inlet of the second liquid injection device. A three-way valve is provided on the pipes connecting the second outlet and the liquid inlet of the second liquid injection device. The equal-volume distribution multi-channel generation device of this invention has a simple structure and can quickly generate equal-volume distribution multi-channels.

Description

Technical Field

[0001] This invention relates to the field of aerodynamic design technology, specifically to an equal-volume distribution multi-channel generation device and method. Background Technology

[0002] Single-inlet, multi-outlet airflow distribution ducts are widely used in multi-cylinder engines, playing a crucial role in providing equal amounts of fresh air to each cylinder, especially essential for spark-ignition engines with high air-fuel ratio requirements. Currently, engine intake duct design is generally assisted by numerical simulation optimization based on the basic configuration. However, this requires simultaneous matching with the engine's in-cylinder operating process, resulting in a massive computational workload exceeding the capabilities of typical workstations and incurring high optimization costs. Consequently, newly developed engines typically reuse the prototype's intake ducts without targeted improvements, failing to achieve maximum engine performance. This is particularly true for side-inlet ducts, where the intake airflow varies significantly between cylinders, leading to large cycle variations and limiting engine performance improvements. Therefore, there is an urgent need to develop a convenient, fast, high-precision, low-cost, low-resistance, equal-flow-rate design method for intake ducts. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing internal flow channel designs and provide a convenient, fast, high-precision, low-resistance, and high-efficiency method for generating equal-volume distribution multi-channel flow channels.

[0004] This invention provides an equal-volume distribution multi-channel generation device and a model box, which has a first inlet, multiple first outlets, a second inlet, a second outlet, a third inlet, and an overflow port on its side wall; the relative positions of the first inlet and the first outlet are the same as the positions of the air inlet and air outlet of the equal-volume distribution multi-channel to be designed; the second inlet and the second outlet are located on two opposite side walls of the model box, the overflow port is located at the top of the model box, and the third inlet is located at the top of the model box or on a side wall near the top;

[0005] The flexible air passage has the same structure and size as the equal-volume distribution multi-pass flow channel to be designed. The flexible air passage includes an air inlet channel and multiple air outlet channels. The air inlet channel is sealed to a first inlet. The multiple air outlet channels are sealed to multiple first outlets one by one. The second inlet is located above the flexible air passage.

[0006] The first liquid injection device has an output pipe connected to the first inlet and the third inlet, and the first outlet pipe connected to the liquid inlet of the first liquid injection device.

[0007] The second liquid injection device has an output pipe connected to the second inlet and an outlet pipe connected to the inlet of the second liquid injection device. A three-way valve is provided on the pipes connecting the second outlet and the inlet of the second liquid injection device.

[0008] The second liquid can solidify under certain conditions or within a certain time.

[0009] Preferably, the air intake channel is located on the side of the latex membrane air passage.

[0010] Preferably, the axes of the air intake channel and the air outlet channel are both in a horizontal plane.

[0011] Preferably, each of the first outlets and the inlet of the first liquid injection device is equipped with a flow pump.

[0012] Preferably, the overflow port is equipped with a valve.

[0013] Preferably, the first liquid is water, oil, or alcohol.

[0014] Preferably, the second liquid is gypsum liquid or epoxy resin.

[0015] Preferably, the flexible airway is made of latex membrane, polyvinyl acetate, or plastic wrap.

[0016] Preferably, a pressure regulating device is connected to the overflow port.

[0017] The present invention also provides a method for generating an equal-volume multi-channel flow using the above-described apparatus, comprising the following steps:

[0018] S101. The flexible air passage is fixed inside the model box, and the air inlet channel of the flexible air passage is sealed to the first inlet; each air outlet channel is sealed to each first outlet.

[0019] S102. Fill the flexible airway with a first liquid;

[0020] S103. Inject the first liquid into the model box, and stop when the injection volume reaches 85%-95% of the internal volume of the model box.

[0021] S104. Each first outlet draws the first liquid at the same flow rate, and the volumetric flow rate of the first liquid drawn by the first outlet is the same as the air flow rate of the engine under target operating conditions.

[0022] S105. Close the overflow port, open the three-way valve 13, and inject the second liquid into the model box. Replace the first liquid in the model box with the second liquid. After the replacement is completed, close the three-way valve 13, open the overflow port, and stop injecting when the second liquid starts to flow out of the overflow port.

[0023] S106. After the second liquid solidifies, the first outlet stops drawing the first liquid; then open the model box, take out the solidified solid model, take out the flexible air passage, and the obtained solid model inner cavity is the low-resistance equal-volume distribution multi-pass flow channel.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention utilizes a model box and a flexible airway to inject a first liquid inside and outside the flexible airway, resulting in a stable, equal flow output and a smooth outline of the flexible airway. Simultaneously, by combining air pressure regulation, the pressure difference between the external plaster liquid and the internal water is avoided from affecting the shape of the flexible airway. Then, the first liquid outside the flexible airway is replaced with a second liquid that can gradually solidify. After solidification, a flow channel cavity with equal outlet flow, lowest resistance, and optimal structure is formed.

[0026] Based on the principles of fluid mechanics, this invention uses a natural generation method to manufacture flow channels, resulting in flow channels with equal outlet flow rates, lowest resistance, and optimal structure. This method is highly adaptable and portable, applicable to the design of all "single inlet-multiple outlet" type low-speed flow field flow channels, such as the intake and exhaust channels of internal combustion engines and the cooling flow channels of lithium battery packs. When the fluid is a high-speed gas, it can be used for the structural design of aero-engine nozzle flow channels, rocket combustion chambers, and nozzle flow channels.

[0027] The method for generating flow channels in this invention is simple, low-cost, efficient, and effective. It can significantly reduce flow channel design costs and shorten production cycles, greatly improve production efficiency, enhance product quality, and promote the development and upgrading of new products. It can also greatly reduce the reliance of product design on numerical simulation design. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the model box of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Model box; 2-First inlet; 3-First outlet; 4-Second inlet; 5-Second outlet; 6-Third inlet; 7-Overflow port; 8-Latex membrane air passage; 9-Inlet channel; 10-Outlet channel; 11-First liquid injection device; 12-Second liquid injection device; 13-Three-way valve; 14-Second valve; 15-Flow pump. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-2 The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] The present invention provides an equal-volume distribution multi-channel generation device, including a model box 1, on which a first inlet 2, multiple first outlets 3, a second inlet 4, a second outlet 5, a third inlet 6, and an overflow port 7 are provided on its side wall; the relative positions of the first inlet 2 and the first outlet 3 are the same as the positions of the air inlet and air outlet of the equal-volume distribution multi-channel to be designed; the second inlet 4 and the second outlet 5 are provided on two opposite side walls of the model box 1, the overflow port 7 is provided on the top of the model box 1, and the third inlet 6 is provided on the top of the model box 1 or on the side wall near the top;

[0034] The flexible airway 8 has the same structure and size as the equal-volume distribution multi-pass flow channel to be designed. The flexible airway 8 includes an air inlet channel 9 and multiple air outlet channels 10. The air inlet channel 9 is sealed to the first inlet 2. The multiple air outlet channels 10 are sealed to multiple first outlets 3 in a one-to-one correspondence. The second inlet 4 is located above the flexible airway 8.

[0035] The first liquid injection device 11 has an output pipe connected to the first inlet 2 and the third inlet 6, and the first outlet 3 is connected to the liquid inlet of the first liquid injection device 11.

[0036] The second liquid injection device 12 has an output pipe connected to the second inlet 4 and a second outlet 5 connected to the liquid inlet of the second liquid injection device 12. A three-way valve 13 is provided on the pipe connecting the second outlet 5 and the liquid inlet of the second liquid injection device 12.

[0037] The second liquid can solidify under certain conditions or within a certain time.

[0038] The flexible airway 8 is made of latex film, polyvinyl acetate, or plastic wrap. In this embodiment, the flexible airway 8 is a latex film airway, with liquid inside and out. Generally, the liquid inside and outside the flexible airway 8 are different. For example, the first liquid inside the flexible airway 8 can be water, oil, alcohol, or other liquids or solutions. The second liquid outside the flexible airway 8 can be a liquid material that can cure under ultraviolet light, a liquid material that can cure under high temperature, or a liquid material that can gradually cure over time at room temperature. Preferably, the second liquid can be a gypsum suspension, epoxy resin, paraffin wax, or other fluids that can gradually solidify. In this embodiment, a gypsum suspension is selected.

[0039] Preferably, the air intake channel 9 is located on the side of the latex membrane air passage 8.

[0040] Preferably, the axes of the intake passage 9 and the exhaust passage 10 are both in a horizontal plane. The relative spatial positions of the intake and exhaust passages are the same as those of the engine air passages.

[0041] Preferably, each of the first outlets 3 and the inlet end of the first liquid injection device 11 is equipped with a flow pump 15.

[0042] Preferably, the overflow port 7 is provided with a valve 14.

[0043] Preferably, the first liquid is water, oil, or alcohol.

[0044] Preferably, the second liquid is gypsum liquid or epoxy resin.

[0045] Preferably, the overflow port 7 is connected to a pressure regulating device, which can be an air compressor or an air pump. The purpose is to adjust the cavity diameter and axial bending path by fine-tuning the air pressure inside the model box 1. The gas pressure is increased when the liquid flow velocity inside the latex membrane airway causes severe "Z"-shaped irregular deformation. When the second liquid is replaced with a denser, more viscous gypsum liquid or epoxy resin, the pressure is adjusted to negative pressure. Depending on the generated airway structure and the target airflow velocity within the airway, the gas pressure inside the model box is adjusted until the latex airway bends smoothly.

[0046] Furthermore, the present invention also provides a method for generating an equal-volume multi-channel flow using the above-described apparatus, comprising the following steps:

[0047] S101. Fix the flexible airway 8 inside the model box 1, and seal the air inlet channel 9 of the flexible airway 8 with the first inlet 2; seal each air outlet channel 10 with each first outlet 3 in a corresponding manner; the specific connection method can be sealing with sealant or sealing by binding, as long as the air inlet channel 9 of the flexible airway 8 is sealed with the first inlet 2 and each air outlet channel 10 is sealed with each first outlet 3.

[0048] S102. Fill the flexible airway 8 with a first liquid;

[0049] S103. Inject the first liquid into the model box 1, and stop when the injection volume reaches 85%-95% of the internal volume of the model box 1.

[0050] In this embodiment, water is preferred as the fluid inside and outside the latex membrane airway. This ensures that when the first liquid, water, is injected, the fluid inside and outside the latex membrane airway is identical—water—with no density or viscosity difference. This allows the latex airway to freely expand and shape, completing the initial self-optimization process. Once the latex airway shape stabilizes, the external water is gradually replaced with plaster liquid, minimizing the impact of the plaster liquid. If plaster liquid is directly injected outside the latex membrane airway, its high viscosity and density, coupled with continuous solidification, hinder the full development of the latex airway.

[0051] The injection of water into the outer layer of the latex membrane airway is stopped when it reaches 85%-95% of the internal volume of model box 1. The remaining 5-15% air is used to regulate the pressure inside model box 1, offsetting the pressure difference caused by the density difference between the plaster liquid outside the plastic airway and the water inside, which affects the shape of the plastic. If the latex membrane airway deforms excessively, the gas pressure can be increased to offset the dynamic pressure when the airflow turns, making the turns of the airway smooth.

[0052] To ensure the balance and stability of the latex membrane airway, the water injection speed should be gradually increased from zero to the target flow rate. The gypsum liquid inlet should not be directly facing the latex membrane airway, and the speed should be relatively low, so as not to have a significant impact on the latex airway.

[0053] S104. Each first outlet 3 draws the first liquid at the same flow rate, and the volumetric flow rate of the first liquid drawn by the first outlet 3 is the same as the air flow rate of the engine under target operating conditions.

[0054] S105. Close the overflow port 7, open the three-way valve 13, and inject the second liquid into the model box 1. The second liquid replaces the first liquid in the model box 1. After the replacement is completed, close the three-way valve 13, open the overflow port 7, and stop injecting when the second liquid starts to flow out of the overflow port 7. At the beginning of the replacement, since the water content of the second outlet 5 is relatively large, the water can be collected separately through the branch pipe of the three-way valve 13. As the replacement continues, the water is gradually replaced, and the plaster liquid flowing out of the second outlet 5 is slightly diluted. At this time, the plaster liquid flowing out of the second outlet 5 can be circulated to the second liquid injection device 12 through the pipeline switching of the three-way valve 13. Finally, after the replacement is completed, close the three-way valve 13 and continue to inject plaster liquid until the plaster liquid flows out of the overflow port 7 and stop injecting the second liquid.

[0055] S106. After the second liquid solidifies, the first outlet 3 stops drawing the first liquid; then open the model box 1, take out the solidified solid model, take out the flexible air passage 8, and the obtained solid model inner cavity is the low-resistance equal-volume distribution multi-pass flow channel. Example

[0056] like Figure 1 The method for generating a multi-channel flow path with equal distribution, as shown, is operated as follows:

[0057] All valves remain closed;

[0058] First, the intake passage 9 and the exhaust passage 10 of the required optimized air passage are installed at the first inlet 2 and the second outlet 3 set on the model box 1. The specific positions are the same as the relative positions of the air inlet and outlet of the engine's internal air passage. The axes of the intake passage 9 and the exhaust passage 10 are both in the horizontal plane.

[0059] The thin-walled latex membrane airway is tied and fixed to the first inlet 2 and the first outlet 3. The size and structure of the thin-walled latex membrane airway 8 are the same as those of the equal-volume distribution multi-pass flow channel. The latex membrane airway has moderate elasticity, is easy to stretch, and does not produce wrinkles when tightened, thus maintaining a smooth and continuous wall surface. The smaller the elasticity of the latex membrane airway, the better.

[0060] When the first liquid injection device 11 is connected to the first inlet 2, water automatically fills the latex membrane airway 8.

[0061] Close the three-way valve 13 and open the valve 14.

[0062] Turn on the water pump and fill the model box 1 with water to about 95% of its volume, then turn off the water pump.

[0063] Turn on three flow control pumps to pump water at the same flow rate, the volumetric flow rate being the same as the engine's target operating air flow rate.

[0064] Turn on the plaster liquid pump and inject plaster liquid into the model box 1. The plaster liquid replaces the water in the model box. After the replacement is completed, continue to inject plaster liquid. Turn off the plaster liquid pump when plaster liquid starts to flow out of the overflow port 7.

[0065] After the plaster has solidified, turn off the three flow control pumps.

[0066] Open model box 1, take out the plaster model, take out the latex membrane airway 8, and the obtained plaster inner cavity is the low-resistance equal flow airway inner channel.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for generating equal-volume distribution multi-channel flow paths using an equal-volume distribution multi-channel flow path generation device, characterized in that, The equal-volume distribution multi-channel flow generation device includes: The model box (1) has a first inlet (2), multiple first outlets (3), a second inlet (4), a second outlet (5), a third inlet (6), and an overflow outlet (7) on its side wall; the relative positions of the first inlet (2) and the first outlet (3) are the same as the positions of the air inlet and air outlet of the equal distribution multi-channel to be designed; the second inlet (4) and the second outlet (5) are located on two opposite side walls of the model box (1), the overflow outlet (7) is located on the top of the model box (1), and the third inlet (6) is located on the top of the model box (1) or on the side wall near the top; The flexible air passage (8) has the same structure and size as the equal-volume distribution multi-pass flow channel to be designed. The flexible air passage (8) includes an air inlet channel (9) and multiple air outlet channels (10). The air inlet channel (9) is sealed to the first inlet (2). The multiple air outlet channels (10) are sealed to the multiple first outlets (3) one by one. The second inlet (4) is located above the flexible air passage (8). The first liquid injection device (11) has an output pipe connected to the first inlet (2) and the third inlet (6), and the first outlet (3) is connected to the liquid inlet of the first liquid injection device (11). The second liquid injection device (12) has an output pipe connected to the second inlet (4) and a second outlet (5) pipe connected to the liquid inlet of the second liquid injection device (12). A three-way valve (13) is provided on the pipe between the second outlet (5) and the liquid inlet of the second liquid injection device (12). The second liquid can solidify under certain conditions or within a certain time. The first liquid is water, oil or alcohol, and the second liquid is gypsum solution or epoxy resin; A method for generating equal-volume multi-pass flow channels using an equal-volume distribution multi-pass flow channel generation device includes the following steps: S101. Fix the flexible airway (8) inside the model box (1), and seal the air inlet channel (9) of the flexible airway (8) with the first inlet (2); seal each air outlet channel (10) with each first outlet (3) in a corresponding manner. S102, Fill the flexible airway (8) with a first liquid; S103. Inject the first liquid into the model box (1) and stop when the injection volume reaches 85%-95% of the internal volume of the model box (1); S104. Each first outlet (3) draws the first liquid at the same flow rate. The volumetric flow rate of the first liquid drawn by the first outlet (3) is the same as the air flow rate of the engine under the target operating condition. S105, close the overflow port (7), open the three-way valve (13), inject the second liquid into the model box (1), replace the first liquid in the model box (1) with the second liquid, close the three-way valve (13) after the replacement is completed, open the overflow port (7), and stop injecting when the second liquid starts to flow out of the overflow port (7); S106. After the second liquid solidifies, the first outlet (3) stops drawing the first liquid; then open the model box (1), take out the solidified solid model, take out the flexible air channel (8), and the obtained solid model inner cavity is the low-resistance equal distribution multi-pass flow channel.

2. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, The air intake channel (9) is located on the side of the flexible air passage (8).

3. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, The axes of the air intake channel (9) and the air outlet channel (10) are both in the horizontal plane.

4. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, Each of the first outlets (3) and the inlet end of the first liquid injection device (11) is equipped with a flow pump (15).

5. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, A valve (14) is provided on the overflow port (7).

6. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, The flexible airway (8) is made of latex film, polyvinyl acetate or plastic wrap.

7. The method for generating an equal-volume distribution multi-channel flow using an equal-volume distribution multi-channel flow generating device as described in claim 1, characterized in that, A pressure regulating device is connected to the overflow port (7).

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