High-temperature three-way pipe integrated multi-runner cooling device and control method thereof

Abstract

The invention relates to the technical field of high-temperature gas pipeline cooling, and discloses a high-temperature three-way pipe integrated type multi-flow-channel cooling device and a control method thereof.The high-temperature three-way pipe integrated type multi-flow-channel cooling device comprises a first cooling pipeline, a second cooling pipeline, a third cooling pipeline, a fourth cooling pipeline and a fifth cooling pipeline, a casting method can be adopted to ensure smooth circulation of a coolant in the cooling channel, the cooling channel is provided with a coolant inlet and a coolant outlet, a transverse branch pipe of the high-temperature three-way pipe is coaxial with the fifth cooling pipeline, and a longitudinal pipeline is arranged in one cooling pipeline, so that the cooling channel of the structure shaped like the Chinese character'ri 'completely wraps the high-temperature three-way pipe; the three-way pipe cooling device can achieve efficient cooling and reduce thermal stress generated by the three-way pipe due to high temperature, is exquisite in design and regular in structure, does not occupy extra space, and provides safety guarantee for high-temperature gas equipment and related testers through system checking.

Description

Technical Field

[0001] This invention relates to the field of high-temperature gas pipeline cooling technology, and discloses a high-temperature tee integrated multi-channel cooling device and its control method. Background Technology

[0002] In modern gas turbine design, the T-junction pipe, as a core flow distribution component of the cooling system, directly affects the thermal management efficiency of the entire equipment. This special pipe structure typically employs a Y-shaped or T-shaped branch design, distributing the cooling medium (such as compressed air or coolant) along different paths to achieve localized cooling of high-temperature components. Its working principle is based on fluid dynamics; when the cooling medium enters the T-junction pipe, it is automatically distributed to each branch according to a preset flow ratio, and finally returns to the cooling system for circulation after merging. This structural design requires ensuring the accuracy of flow distribution to each branch while avoiding turbulent losses caused by abrupt changes in the flow path. Typical applications include internal cooling channels for turbine blades, combustion chamber bypass systems, and bearing housing cooling circuits—critical components whose performance directly affects the thermal efficiency and service life of the gas turbine.

[0003] Three-way pipe cooling systems face multiple technical challenges in practical applications, with sealing failure, insufficient material durability, structural reliability under high-temperature loads, and complex installation and maintenance being the most prominent issues. Due to the multiple branch channels within the three-way pipe, differences in the thermal expansion coefficients of different materials under high-temperature and high-pressure conditions can lead to micro-gaps at the joints, resulting in cooling medium leakage. This leakage not only reduces cooling efficiency but can also cause localized overheating. Regarding materials, traditional metal structures are prone to intergranular corrosion and creep deformation under long-term high-temperature oxidation environments, while non-metallic sealing materials may lose elasticity due to thermal aging. Furthermore, the three-way pipe is subjected to alternating thermal stress in gas turbines with frequent start-stop cycles, and stress concentration at branch connections accelerates fatigue crack formation. The complexity of the installation process is equally significant—multi-pipe connections require extremely high coaxiality; deviations in on-site welding or flange connections can lead to uneven flow resistance and even excessive vibration. These factors collectively constrain the stability and service life of three-way pipe cooling systems. Summary of the Invention

[0004] The purpose of this invention is to provide a high-temperature tee integrated multi-channel cooling device and its control method. The device utilizes a H-shaped cooling channel to completely enclose the high-temperature tee, which has a regular structure, does not occupy extra space, can achieve efficient cooling, and reduces the thermal stress generated by the tee due to high temperature.

[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows: A high-temperature three-way pipe integrated multi-channel cooling device, comprising a three-way pipe, as well as a first cooling pipeline, a second cooling pipeline, a third cooling pipeline and a fourth cooling pipeline. The first cooling pipeline, the second cooling pipeline, the third cooling pipeline and the fourth cooling pipeline are connected end to end in sequence to form a rectangular structure; a fifth cooling pipeline is arranged in the middle of the rectangular structure for connecting two opposite sides of the two rectangular structures, so that the rectangular structure forms a structure in the shape of a Chinese character 'Ri' with five cooling pipelines interconnected. One of the cooling pipelines on two opposite sides directly connected to the fifth cooling pipeline is sleeved outside the longitudinal pipeline of the three-way pipe. A part of the transverse branch pipe of the three-way pipe is located in the fifth cooling pipeline, and the rest extends outside the structure in the shape of a Chinese character 'Ri'. A coolant inlet and a coolant outlet communicating with the five cooling pipelines are further arranged on the structure in the shape of a Chinese character 'Ri'.

[0006] Furthermore, a box body is sleeved on the structure in the shape of a Chinese character 'Ri'. The first cooling pipeline, the second cooling pipeline, the third cooling pipeline, the fourth cooling pipeline and the fifth cooling pipeline are all located inside the box body.

[0007] Furthermore, the coolant inlet and the coolant outlet are externally arranged on the box body and extend outwards by 20 mm for connection with an external cooling device through a flange.

[0008] Furthermore, the outer wall of the three-way pipe is hermetically connected to the contact part of the corresponding cooling pipe wall.

[0009] Furthermore, it further comprises: A coolant flow rate regulating unit, comprising a flow regulating valve for adjusting the coolant flow rate at the coolant inlet position; A coolant temperature acquisition unit for acquiring the coolant temperature at the coolant outlet position through a temperature sensor; A coolant control element, electrically connected to the coolant flow rate regulating unit and the coolant temperature acquisition unit, for regulating the coolant flow rate at the coolant inlet position according to the acquired coolant temperature at the coolant outlet position.

[0010] To achieve the above technical effects, the present invention further provides a design method for a high-temperature three-way pipe integrated multi-channel cooling device for obtaining the above-mentioned high-temperature three-way pipe integrated multi-channel cooling device, comprising: Step 1: Establish a three-dimensional geometric model of the multi-channel cooling device according to the structure of the multi-channel cooling device; Step 2: Use the finite element method to perform mesh division on the flow field region and the solid structure region of the three-dimensional geometric model of the multi-channel cooling device; Step 3: Set the boundary conditions of the flow field and solid structure after mesh generation, and use the Ke RNG calculation model to solve the transient temperature of the multi-channel cooling device to obtain the transient temperature distribution of the three-way pipe and the H-shaped structure after cooling. Step 4: Import the transient temperature distribution of the T-shaped pipe and the H-shaped structure into the ANSYS Workbench static structure processing module, apply constraints including high-temperature gas flow rate and pressure, and coolant flow rate and pressure, obtain the stress distribution of the T-shaped pipe and the H-shaped structure after heating and cooling, and perform strength verification. If the strength of the T-shaped pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement, then the structure of the high-temperature T-shaped pipe integrated multi-channel cooling device meets the requirements. Otherwise, adjust the size of the H-shaped structure until the strength of the T-shaped pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement.

[0011] Furthermore, the dimensions of the H-shaped structure include the radial dimensions and wall thickness of the first, second, third, fourth, and fifth cooling pipes, as well as the length, wall thickness, and radial dimensions of the coolant inlet and coolant outlet.

[0012] Furthermore, the methods for meshing the flow field region and solid structure region of the three-dimensional geometric model of a multi-channel cooling device using the finite element method include: The flow area of ​​the three-dimensional geometric model of the high-temperature tee pipe and the first, second, third, fourth and fifth cooling pipes was meshed using the finite element method with structured hexahedral mesh, and the meshed flow field of the coolant and the internal fluid of the tee pipe was obtained. In this process, boundary layers are set on the inner walls of the three-dimensional geometric models of the first, second, third, fourth, and fifth cooling pipes, as well as the inner wall of the tee pipe, with a growth rate of 1.2 and 10 boundary layers.

[0013] Furthermore, the H-shaped structure is also fitted with a box, and the first cooling pipe, the second cooling pipe, the third cooling pipe, the fourth cooling pipe and the fifth cooling pipe are all located inside the box. The three-dimensional geometric model of the box is meshed using the finite element method with unstructured tetrahedral mesh.

[0014] Furthermore, the boundary conditions for the flow field and solid structure after mesh generation include: The coolant outlet pressure boundary condition is atmospheric pressure; A multi-channel cooling device comprising a first cooling pipe, a second cooling pipe, a third cooling pipe, a fourth cooling pipe, and a fifth cooling pipe, and a T-shaped pipe with a wall-like boundary type; The coolant inlet of the multi-channel cooling device and the fluid inlet interface of the three-way pipe are set as mass flow inlets; The coolant outlet of the multi-channel cooling device and the fluid outlet interface of the three-way pipe are set as pressure outlets.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The multi-channel cooling device of the present invention completely wraps the hot end of the three-way pipe and has a good heat exchange effect. The multi-channel cooling device has a simple structure, regular shape, and is not prone to structural damage, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the high-temperature three-way pipe integrated multi-channel cooling device in Embodiment 1 or 2; Figure 2 is a schematic diagram of the surface mesh of the three-dimensional geometric model in Embodiment 1 or 2; Figure 3 is a schematic diagram of the temperature distribution of the three-way pipe in Embodiment 2; Figure 4 is a schematic diagram of the temperature distribution of the "day" - shaped structure of the multi-channel cooling device in Embodiment 2; Figure 5 is a schematic diagram of the equivalent stress distribution of the multi-channel cooling device in Embodiment 2; Wherein, 1, the first cooling pipeline; 2, the second cooling pipeline; 3, the third cooling pipeline; 4, the fourth cooling pipeline; 5, the fifth cooling pipeline; 6, the coolant inlet; 7, the coolant outlet; 8, the box body; 9, the longitudinal pipeline; 10, the transverse branch pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described in detail below in conjunction with the embodiments and the drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0018] Embodiment 1 Refer to Figure 1 and Figure 2 , a high-temperature three-way pipe integrated multi-channel cooling device, including a three-way pipe, and the first cooling pipeline 1, the second cooling pipeline 2, the third cooling pipeline 3 and the fourth cooling pipeline 4. The first cooling pipeline 1, the second cooling pipeline 2, the third cooling pipeline 3 and the fourth cooling pipeline 4 are connected end to end in sequence to form a rectangular structure; a fifth cooling pipeline 5 is arranged in the middle of the rectangular structure and is used to connect two opposite sides of the two rectangular structures, so that the rectangular structure forms a "day" - shaped structure in which five cooling pipelines are interconnected; One of the cooling pipelines on two opposite sides directly connected to the fifth cooling pipeline 5 is sleeved outside the longitudinal pipeline 9 of the three-way pipe, and a part of the transverse branch pipe 10 of the three-way pipe is located in the fifth cooling pipeline 5, and the rest extends outside the day-shaped structure; A coolant inlet 6 and a coolant outlet 7 communicated with the five cooling pipelines are further arranged on the day-shaped structure.

[0019] In this embodiment, five cooling pipelines are arranged to form a day-shaped structure with a cooling channel. The casting method can be adopted to ensure the smooth flow of the coolant in the cooling channel. The cooling channel is provided with a coolant inlet 6 and a coolant outlet 7. The transverse branch pipe 10 of the high-temperature three-way pipe is coaxial with the fifth cooling pipeline 5, and the longitudinal pipeline 9 is arranged in one of the cooling pipelines, so that the cooling channel of the day-shaped structure completely wraps the high-temperature three-way pipe, which can achieve efficient cooling, reduce the thermal stress generated by the three-way pipe due to high temperature. At the same time, the design of the present invention is delicate, the structure is regular, and it does not occupy extra space. After system verification, it provides safety guarantee for high-temperature gas equipment and related testers.

[0020] In this embodiment, the day-shaped structure is further sleeved with a box body 8, and the first cooling pipeline 1, the second cooling pipeline 2, the third cooling pipeline 3, the fourth cooling pipeline 4 and the fifth cooling pipeline 5 are all located in the box body 8. The box body 8 is made of a material with good heat insulation performance, which can effectively reduce the influence of the external environment on the internal temperature of the cooling device and further improve the cooling effect.

[0021] The multi-channel cooling device in this embodiment further includes: A coolant flow rate regulating unit, including a flow regulating valve, for adjusting the coolant flow rate at the position of the coolant inlet 6; A coolant temperature acquisition unit, for acquiring the coolant temperature at the position of the coolant outlet 7 through a temperature sensor; A coolant control element, electrically connected to the coolant flow rate regulating unit and the coolant temperature acquisition unit, for regulating the coolant flow rate at the position of the coolant inlet 6 according to the acquired coolant temperature at the position of the coolant outlet 7.

[0022] In this embodiment, the temperature at the coolant outlet 7 can be monitored in real time through the coolant temperature acquisition unit. As the intelligent core of the entire cooling device, the coolant control element sends a control instruction to the coolant flow rate regulating unit according to the acquired temperature information, so that the coolant flow rate regulating unit can accurately control the coolant flow rate entering the cooling channel according to actual needs, thereby realizing the dynamic regulation of the coolant flow rate, ensuring that the cooling effect reaches the best state, not only ensuring the effective cooling of the high-temperature three-way pipe, but also avoiding the waste of coolant and improving the energy efficiency ratio of the entire cooling device.

[0023] Based on the same inventive concept, this embodiment also provides a design method for a high-temperature tee-type integrated multi-channel cooling device, used to obtain the aforementioned high-temperature tee-type integrated multi-channel cooling device, comprising: Step 1: Establish a three-dimensional geometric model of the multi-channel cooling device based on its structure; Step 2: Mesh the flow field region and solid structure region of the three-dimensional geometric model of the multi-channel cooling device using the finite element method; Step 3: Set the boundary conditions of the flow field and solid structure after mesh generation, and use the Ke RNG calculation model to solve the transient temperature of the multi-channel cooling device to obtain the transient temperature distribution of the three-way pipe and the H-shaped structure after cooling. Step 4: Import the transient temperature distribution of the T-shaped pipe and the H-shaped structure into the ANSYS Workbench static structure processing module, apply constraints such as high-temperature gas flow rate and pressure, and coolant flow rate and pressure, obtain the stress distribution of the T-shaped pipe and the H-shaped structure after heating and cooling, and perform strength verification. If the strength of the T-shaped pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement, then the structure of the high-temperature T-shaped pipe integrated multi-channel cooling device meets the requirements. Otherwise, adjust the size of the H-shaped structure until the strength of the T-shaped pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement.

[0024] Example 2 See Figures 1 to 5 This embodiment proposes an integrated multi-channel cooling device to address the heat exchange requirements of a three-way pipe structure in a high-temperature gas heat exchanger. The specific structure is as follows: The main body of the multi-channel cooling device in this embodiment is a box structure 8, with a coolant inlet 6 and a coolant outlet 7 on the upper and lower ends respectively. The box 8 contains a first cooling pipe 1, a second cooling pipe 2, a third cooling pipe 3, a fourth cooling pipe 4, and a fifth cooling pipe 5, which together form a T-shaped cavity.

[0025] The longitudinal pipe 9 of the high-temperature tee is coaxial with the third cooling pipe 3, and the transverse branch pipe 10 is coaxial with the fifth cooling pipe 5. The first cooling pipe 1, the second cooling pipe 2, the third cooling pipe 3, the fourth cooling pipe 4 and the fifth cooling pipe 5 are interconnected. The multi-channel cooling pipe with the H-shaped structure completely encloses the high-temperature tee.

[0026] The coolant inlet 6 and coolant outlet 7 are located outside the housing 8 and extend outwards by 20mm, allowing connection to external cooling devices via flanges. The third cooling pipe 3 primarily cools the longitudinal section 9 of the high-temperature tee, while the fifth cooling pipe 5 primarily cools the transverse branch pipe 10 of the high-temperature tee. The first cooling pipe 1, second cooling pipe 2, and fourth cooling pipe 4 are primarily responsible for coolant inlet and outlet.

[0027] According to the test results, the air inlet of the three-way pipe and the coolant inlet 6 should be as close as possible to ensure the optimal cooling effect of the present invention.

[0028] In some embodiments, the multi-channel cooling device has multiple return branch pipes. Due to the influence of contact distance, the heat exchange between the high-temperature gas and the coolant is insufficient. Through the H-shaped pipe, multiple contacts can be made. By adjusting the external coolant flow regulating valve, the return coolant in the box 8 can perform secondary cooling on the high-temperature tee pipe.

[0029] In some embodiments, there is a gap between the tee pipe and the housing 8 of the multi-channel cooling device, and the connection between the tee pipe and the housing 8 of the multi-channel cooling device or each cooling pipe needs to be sealed.

[0030] In addition, the radius of the three openings in the multi-channel cooling device is the same as or slightly larger than the outer diameter of the tee pipe.

[0031] To avoid thermal stress concentration in the multi-channel cooling device, a gasket can be installed at the junction of the tee pipe and the integrated multi-channel cooling device.

[0032] The design method of the multi-channel cooling device in this embodiment adopts the following technical solution: Calculate the temperature field of the high-temperature three-way integrated multi-channel cooling device based on ANSYS finite element method and perform strength verification. The specific steps are as follows: Step 1: Based on the relevant structure of the multi-channel cooling device, construct a three-dimensional geometric model of the multi-channel cooling device; Step 2: Eliminate minute features, overlapping surfaces, and gaps in the 3D geometric model; Step 3: Perform topological segmentation on complex contact surfaces; Step 4: The finite element method is used to mesh the flow field near the three-dimensional geometric model. Since the cooling system contains multiple complex curves and surfaces, a partitioned meshing method is adopted for the integrated multi-channel cooling structure: unstructured tetrahedral meshes are used in the solid part region of the multi-channel cooling device and the external region of the three-way pipe, such as... Figure 2 The above is a surface mesh model of a multi-channel cooling device, with the internal channel area and the internal area of ​​the three-way pipe using a structured hexahedral mesh; Step 5, set mesh parameters: Set the number of boundary layers to 10 and the growth rate to 1.2. Check that the Jacobian ratio is >0.7 and the warpage is <15°; Step 6: After mesh generation, select the computation model. This process uses the RNG k-epsilon model with standard wall functions, C1 value of 1.42, C2 value of 1.68, and wall Prandtl number of 0.85. Step 7: Set boundary conditions for each region of the high-temperature gas channel and the internal channel flow field of the heat exchanger: set the outlet pressure of the high-temperature gas fluid region to 5 atmospheres and the outlet pressure of the cooling fluid region to 1 atmosphere, and suppress backflow at the outlet. Step 8: Set the boundary conditions for each part as follows: Set the boundary type of the tee pipe and the multi-channel cooling device as a wall, and set the wall structure material as 45 structural steel (density 8030kg / m³, specific heat 502.48J / (kg·K), thermal conductivity 16.27W / (m·K), allowable stress 140MPa). Step 9: Set the inlet interface of the three-way pipe flow area as the velocity inlet, set the two outlet interfaces of the three-way pipe flow area as the pressure outlet, set the interface of the multi-channel cooling device near the high-temperature gas inlet as the velocity inlet, and set the interface of the other end as the pressure outlet. Step 10: The high-temperature gas medium is defined as air at 500K, and the cooling fluid is defined as liquid water at 300K. Fluent software is used to solve for the unsteady temperature fluctuations in the flow field region to obtain the temperature distribution of the tee and the H-shaped structure, as shown below. Figure 3 , Figure 4 As shown; Step 8: Using the model temperature solved by Fluent as the boundary condition, the strength of the three-way integrated multi-channel heat exchange cooling device is checked using ANSYS Workbench static structure. Binding constraints are applied to one inlet and two outlet interfaces of the three-way pipe to obtain the equivalent stress distribution after heat exchange of the three-way pipe, as shown below. Figure 5 As shown, a strength check is performed; if the strength of the tee pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement, then the structure of the high-temperature tee pipe integrated multi-channel cooling device meets the requirements; otherwise, adjust the size of the H-shaped structure until the strength of the tee pipe meets the first strength requirement and the strength of the H-shaped structure meets the second strength requirement.

[0033] In some cases, it was found that when the relevant parameters such as the air pressure and flow rate of the coolant inlet 6 are set too low, the insufficient cooling dose will lead to insufficient cooling dose in the third cooling pipe 3, resulting in poor cooling effect of the longitudinal pipe 9 of the high-temperature tee pipe, and the cooling effect is much lower than that of the transverse branch pipe 10 of the high-temperature tee pipe.

[0034] In some cases, it was found that when the coolant inlet pressure, flow rate, and other related parameters were set too high, and the coolant was nitrogen, the excessively high nitrogen flow rate led to insufficient heat exchange in a short period, resulting in poor cooling performance. Most liquid coolants are significantly more effective than air coolants. Liquid coolants include: liquid water (at room temperature), fluorinated liquids, and ethylene glycol; air coolants include: nitrogen and air.

[0035] To ensure cooling effectiveness, the multi-channel cooling device in this embodiment further includes: The coolant flow regulating unit includes a flow regulating valve for adjusting the coolant flow at coolant inlet position 6; The coolant temperature acquisition unit is used to acquire the coolant temperature at coolant outlet 7 via a temperature sensor. The coolant control element is electrically connected to the coolant flow regulation unit and the coolant temperature acquisition unit, and is used to regulate the coolant flow at the coolant inlet at the coolant inlet at the coolant outlet at the acquired coolant temperature.

[0036] The coolant flow regulation unit can adjust appropriate parameters such as inlet coolant pressure and flow rate to meet the requirements of high-temperature tee pipe strength and dynamic limiting response.

[0037] Step 1: Randomly set N monitoring points on the wall of the high-temperature tee pipe. The heat transfer flow from the high-temperature fuel gas to the coolant through the first cooling pipe 1, the second cooling pipe 2, the third cooling pipe 3, the fourth cooling pipe 4, and the fifth cooling pipe 5 at the nth position is as follows: (1) In the formula, The position number of the nth position is the total heat flow from the gas to the gas wall, which is obtained by adding the convective heat flow and the radiative heat flow from the gas to the gas wall, where n = 1, 2, ..., N. It refers to the thickness of the high-temperature tee pipe. It is the outer surface wall temperature of the high-temperature tee pipe. It is the inner surface wall temperature of the high-temperature tee pipe. It is the thermal conductivity of the high-temperature tee. The correction factor for the heat transfer flow from the high-temperature combustion gas to the coolant, i.e., the uncertainty, is expressed as: (2) In the formula, To select the inner surface wall temperature difference of the target points before and after on the same cross section, To select the outer surface wall temperature difference of the target points before and after on the same cross section, To select the distance between the target points before and after on the same cross section, The total distance over which heat conduction occurs. The difference in thermal conductivity is selected between target points before and after the same cross section. The thermal conductivity of the high-temperature tee pipe.

[0038] Step 2: The coolant flows in turbulent flow through the first cooling pipe 1, the second cooling pipe 2, the third cooling pipe 3, the fourth cooling pipe 4, and the fifth cooling pipe 5. The flow is corrected using two-dimensional geometry and the Nusselt number-related criterion is applied. Temperature change of liquid film import effect Channel bending effect roughness The correction is made, and the correction formula is: (3) In the formula, The diameter of the high-temperature tee pipe is [missing information]. For liquid reference temperature The thermal conductivity of the liquid is calculated for the qualitative temperature.

[0039] Refer to step 1 to calculate the convective heat transfer flux from the outer surface of the high-temperature tee to the coolant.

[0040] Step 3: The cooling pipe wall temperature can be solved using the discrete two-dimensional heat conduction control differential equation for thermal equilibrium, thus determining the rationality of using the coolant under specific operating conditions. The control differential equation is: (4) In the formula, To cool the pipe wall temperature, , These are the axial and radial coordinates of the cooling pipes, respectively.

[0041] In some instances, it has been found that the temperature of the outer wall of the housing 8 varies with the temperature of the fluid inside the high-temperature tee pipe, as well as the type of coolant and the cooling conditions. In some cases, the temperature of the outer wall of the cooling housing may cause harm to the human body. Therefore, in this embodiment, a thermal barrier coating is added to the outer wall of the cooling housing or physical isolation is adopted.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature tee-type integrated multi-channel cooling device, characterized in that, It includes a three-way pipe, as well as a first cooling pipeline, a second cooling pipeline, a third cooling pipeline and a fourth cooling pipeline. The first cooling pipeline, the second cooling pipeline, the third cooling pipeline and the fourth cooling pipeline are connected end to end in sequence to form a rectangular structure; a fifth cooling pipeline is arranged in the middle of the rectangular structure for connecting two opposite sides of the two rectangular structures, so that the rectangular structure forms a structure in the shape of a Chinese character 'Ri' with five cooling pipelines interconnected. One of the cooling pipelines on two opposite sides directly connected to the fifth cooling pipeline is sleeved outside the longitudinal pipeline of the three-way pipe. The transverse branch pipe of the three-way pipe is partially located in the fifth cooling pipeline, and the rest extends outside the structure in the shape of a Chinese character 'Ri'. A coolant inlet and a coolant outlet connected to the five cooling pipelines are also arranged on the structure in the shape of a Chinese character 'Ri'.

2. The multi-channel cooling device according to claim 1, characterized in that, A box body is also sleeved on the structure in the shape of a Chinese character 'Ri'. The first cooling pipeline, the second cooling pipeline, the third cooling pipeline, the fourth cooling pipeline and the fifth cooling pipeline are all located inside the box body.

3. The multi-channel cooling device according to claim 2, characterized in that, The coolant inlet and the coolant outlet are externally placed outside the box body and extend outwards by 20 mm for connection with an external cooling device through a flange.

4. The multi-channel cooling device according to claim 1, characterized in that, The outer wall of the three-way pipe is hermetically connected to the pipe wall of the corresponding cooling pipe.

5. The multi-channel cooling device according to claim 1, characterized in that, It also includes: A coolant flow rate regulating unit, including a flow regulating valve for adjusting the coolant flow rate at the coolant inlet position. A coolant temperature acquisition unit for acquiring the coolant temperature at the coolant outlet position through a temperature sensor. A coolant control element, electrically connected to the coolant flow rate regulating unit and the coolant temperature acquisition unit, for regulating the coolant flow rate at the coolant inlet position according to the acquired coolant temperature at the coolant outlet position.

6. A design method for a high-temperature tee-type integrated multi-channel cooling device, used to obtain the high-temperature tee-type integrated multi-channel cooling device according to any one of claims 1-5, characterized in that, It includes: Step 1: Establish a three-dimensional geometric model of the multi-channel cooling device according to the structure of the multi-channel cooling device. Step 2: Use the finite element method to perform mesh division on the flow field region and the solid structure region of the three-dimensional geometric model of the multi-channel cooling device. Step 3: Set the boundary conditions of the flow field and the solid structure after mesh division, and use the K-e RNG calculation model to solve the transient temperature of the multi-channel cooling device to obtain the transient temperature distribution after cooling of the three-way pipe and the structure in the shape of a Chinese character 'Ri'. Step 4: Import the transient temperature distribution of the three-way pipe and the structure in the shape of a Chinese character 'Ri' into the ANSYS Workbench static structure processing module, apply the constraint conditions including the high-temperature gas flow rate, pressure and coolant flow rate, pressure, and obtain the stress distribution of the three-way pipe and the structure in the shape of a Chinese character 'Ri' after heating and cooling and perform strength verification; if the strength of the three-way pipe meets the first strength requirement and the strength of the structure in the shape of a Chinese character 'Ri' meets the second strength requirement, then the structure of the high-temperature three-way pipe integrated multi-channel cooling device meets the requirements, otherwise adjust the size of the structure in the shape of a Chinese character 'Ri' until the strength of the three-way pipe meets the first strength requirement and the strength of the structure in the shape of a Chinese character 'Ri' meets the second strength requirement.

7. The design method according to claim 6, characterized in that, The dimensions of the structure in the shape of a Chinese character 'Ri' include the radial dimensions and wall thicknesses of the first cooling pipeline, the second cooling pipeline, the third cooling pipeline, the fourth cooling pipeline and the fifth cooling pipeline, and the lengths, wall thicknesses and radial dimensions of the coolant inlet and the coolant outlet.

8. The design method according to claim 6, characterized in that, Methods for meshing the flow field region and solid structure region of a three-dimensional geometric model of a multi-channel cooling device using the finite element method include: The flow area of ​​the three-dimensional geometric model of the high-temperature tee pipe and the first, second, third, fourth and fifth cooling pipes was meshed using the finite element method with structured hexahedral mesh, and the meshed flow field of the coolant and the internal fluid of the tee pipe was obtained. In this process, boundary layers are set on the inner walls of the three-dimensional geometric models of the first, second, third, fourth, and fifth cooling pipes, as well as the inner wall of the tee pipe, with a growth rate of 1.2 and 10 boundary layers.

9. The design method according to claim 8, characterized in that, The H-shaped structure is also fitted with a box, and the first, second, third, fourth and fifth cooling pipes are all located inside the box. The three-dimensional geometric model of the box is meshed using the finite element method with unstructured tetrahedral mesh.

10. The design method according to claim 6, characterized in that, The flow field and boundary conditions of the solid structure after mesh generation include: The coolant outlet pressure boundary condition is atmospheric pressure; A multi-channel cooling device comprising a first cooling pipe, a second cooling pipe, a third cooling pipe, a fourth cooling pipe, and a fifth cooling pipe, and a T-shaped pipe with a wall-like boundary type; The interface between the coolant inlet and the fluid inlet of the three-way pipe in the multi-channel cooling device is set as a mass flow inlet. The coolant outlet of the multi-channel cooling device and the fluid outlet interface of the three-way pipe are set as pressure outlets.

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