Blender for air inlet heating adjusting system and cooling method of blender

Abstract

The invention relates to a mixer for an air inlet heating adjusting system and a cooling method thereof, and relates to the technical field of wind tunnel test, the mixer comprises a mixing temperature reduction section and a plurality of main flow pipes, the mixing temperature reduction section is provided with a main temperature reduction chamber, one end of the main temperature reduction chamber is provided with at least one first air inlet channel, and the other end of the main temperature reduction chamber is provided with a second air inlet channel. The first air outlet channels are in one-to-one correspondence with the main flow pipes; the main flow pipes penetrate through the main temperature reduction chamber, each main flow pipe is inserted into the corresponding first air outlet channel, and the inner walls of the first air outlet channels and the outer walls of the main flow pipes form a first annular channel. Each path of high-temperature and high-pressure gas entering the main flow pipe is surrounded by low-temperature gas sprayed out of the corresponding first annular channel and the second annular channel, so that the problem that the temperature uniformity of gas at an outlet of the mixer is poor and the mixing efficiency is high when the low-temperature gas is mixed in an existing annular blowing mode is solved to a certain extent. The technical problem that the mixer panel is easy to ablate, crack and deform is solved.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel testing technology, and in particular to a mixer for an intake air heating and regulating system and its cooling method. Background Technology

[0002] A high-temperature combustion wind tunnel is a ground-based test facility that uses high-temperature gases generated by combustion of fuel gas to simulate a high-speed flight environment. The intake heating and regulation system generates a high-enthalpy airflow within the high-temperature combustion wind tunnel to simulate specific flight altitudes and speeds, used for experimental research on hypersonic engines and hypersonic vehicles. The intake heating and regulation system employs a general technical solution of "high-temperature combustion of air and alcohol + air mixing," allowing for a wide range of adjustments while maintaining fixed geometry in the injector, combustion chamber, and nozzle throat, with no moving parts.

[0003] The mixer is a key component of the intake heating and control system. Its main function is to regulate the flow rate of cryogenic gas mixed into the high-temperature, high-pressure mainstream gas under Ma2.5 to Ma5 conditions, thereby reducing the overall temperature of the mixture and achieving the gas state required for wind tunnel testing. The mixer typically uses a circumferential blowing method to incorporate cryogenic gas into the high-temperature, high-pressure mainstream gas. When the amount of cryogenic gas incorporated is small, this incorporation method has poor penetration into the mainstream gas, resulting in poor gas temperature uniformity at the mixer outlet. Furthermore, under hypersonic conditions, direct combustion to generate the required fuel gas can easily lead to phenomena such as ablation, cracking, and deformation of the mixer panel, thus affecting the performance and reliability of the intake heating and control system. Summary of the Invention

[0004] To address the shortcomings of related technologies, this invention provides a mixer and its cooling method for an intake air heating and regulating system. High-temperature, high-pressure gas enters multiple main flow pipes of the mixer, and each flow of high-temperature, high-pressure gas entering a main flow pipe is surrounded by low-temperature gas ejected from a corresponding first and second annular channel. This addresses, to some extent, the technical problems of poor gas temperature uniformity at the mixer outlet and the ease with which the mixer panel is prone to burning, cracking, and deformation when using existing circumferential blowing methods with insufficient low-temperature gas.

[0005] This invention provides a mixer for an intake air heating and regulating system, comprising a mixing and cooling section and multiple main flow pipes. The mixing and cooling section is provided with a main cooling chamber. One end of the main cooling chamber has at least one first intake channel and a first exhaust channel corresponding to each of the main flow pipes. The main flow pipes pass through the main cooling chamber, and each main flow pipe is inserted into its corresponding first exhaust channel. The inner wall of the first exhaust channel and the outer wall of the main flow pipe form a first annular channel.

[0006] In some embodiments, the mixing and cooling section is provided with a first cooling chamber, which has a first inlet channel and a first outlet channel; the first cooling chamber is used to uniformly cool one end face of the mixing and cooling section, and the first outlet channel is not connected to the first cooling chamber.

[0007] In some embodiments, the mixing and cooling section is provided with a first diversion channel and a first confluence channel, and a plurality of first inflow channels parallel to the end face of the mixing and cooling section are provided around the first cooling cavity, all of which are connected to the first diversion channel; a plurality of first outflow channels parallel to the end face of the mixing and cooling section are provided around the first cooling cavity, and all of which are connected to the first confluence channel.

[0008] In some embodiments, a plurality of first reinforcing columns are uniformly arranged in the first cooling chamber, parallel to the axis of the first air outlet channel; the two ends of the first reinforcing columns are fixedly connected to the inner wall of the first cooling chamber.

[0009] In some embodiments, the mixing and cooling section of the mixer is further provided with a secondary cooling chamber, and the primary cooling chamber is located between the secondary cooling chamber and the first cooling chamber; the secondary cooling chamber has a second air inlet channel and a second air outlet channel corresponding to the main air pipe; the main air pipe passes through the secondary cooling chamber, and each main air pipe is inserted into its corresponding second air outlet channel, the inner wall of the second air outlet channel and the outer wall of the main air pipe forming a second annular channel; the first annular channel and the second annular channel are located at both ends of the mixing and cooling section.

[0010] In some embodiments, the auxiliary cooling chamber is longer than the main cooling chamber in the axial direction of the mixer; an annular perforated plate is provided in the auxiliary cooling chamber, the outer wall of the annular perforated plate and the inner wall of the auxiliary cooling chamber form an annular cavity, the second air inlet is provided on the wall of the annular cavity, and all the main air pipes are evenly distributed on the inner side of the annular perforated plate.

[0011] In some embodiments, the mixer further includes a first distributor and a second distributor; the mixing and cooling section is provided with a plurality of first air intake channels evenly distributed around the axis of the main cooling chamber, and all the first air intake channels are connected to the first distributor; the mixing and cooling section is provided with a plurality of second air intake channels evenly distributed around the axis of the auxiliary cooling chamber, and all the second air intake channels are connected to the second distributor; all the second air intake channels are located on the side of the auxiliary cooling chamber away from the mixing and cooling section.

[0012] In some embodiments, a plurality of reinforcing rods parallel to the axis of the annular perforated plate are uniformly arranged on the inner side of the annular perforated plate, and the two ends of the reinforcing rods are fixedly connected to the inner wall of the secondary cooling chamber.

[0013] In some embodiments, the mixing and cooling section is provided with a second cooling chamber, the second cooling chamber having a second inlet channel and a second outlet channel; the second cooling chamber is used to uniformly cool the end face of the mixing and cooling section provided with the second outlet channel, the second outlet channel and the second cooling chamber are not interconnected; a plurality of second reinforcing columns are uniformly arranged inside the second cooling chamber; the two ends of the second reinforcing columns are fixedly connected to the inner wall of the second cooling chamber.

[0014] The present invention also provides a cooling method for an intake air heating and regulating system, using the mixer of the above-mentioned intake air heating and regulating system and a combustion chamber; the combustion chamber is detachably connected to the mixing and de-cooling section of the mixer, and the first cooling chamber of the mixer is located between the combustion chamber and the main de-cooling chamber of the mixing and de-cooling section; Cold water is continuously supplied to the first cooling chamber, and gas with adjustable temperature and pressure is supplied to the main cooling chamber; the high-temperature and high-pressure gas in the combustion chamber enters multiple main flow pipes of the mixer; the gas in the main cooling chamber is ejected through multiple first annular channels of the mixing and cooling section and mixed with the high-temperature and high-pressure gas in the main flow pipes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The high-temperature, high-pressure gas in the combustion chamber enters multiple main flow pipes of the mixer. Each main flow pipe is surrounded by low-temperature gas ejected from a corresponding first and second annular channel, achieving a uniform cross-distribution of hot and cold gas streams. This increases the contact area between the hot and cold gas streams, significantly improving the heat exchange efficiency and the temperature uniformity of the mixer's output gas. Furthermore, the cold gas streams in the main and auxiliary cooling chambers exchange heat with the gas streams in all main flow pipes through the pipe walls, further reducing the temperature of the gas streams within the main flow pipes to ensure the gas output from the mixer meets experimental requirements. The gas in the main and auxiliary cooling chambers also reduces the temperature of the mixing and cooling section, decreasing the likelihood of the mixer experiencing ablation, cracking, or deformation due to excessive temperature, extending its lifespan, and improving its reliability.

[0016] 2. Continuously supplying cold water to the first cooling chamber and the second cooling chamber can continuously cool and reduce the temperature of both ends of the mixer, thereby reducing the possibility of ablation, cracking, deformation, and other phenomena on the two ends of the mixer due to excessive temperature when there is less low-temperature gas in the mixer, extending the life of the mixer and improving its reliability. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the mixer in a specific embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the mixer in a specific embodiment of the present invention. Figure 2 ; Figure 3 A cross-sectional view of the mixer in a specific embodiment of the present invention. Figure 1 ; Figure 4 for Figure 3 Enlarged view of region A in the middle; Figure 5 for Figure 3 Enlarged view of region B in the middle; Figure 6 A cross-sectional view of the mixer in a specific embodiment of the present invention. Figure 2 ; Figure 7 This is a cross-sectional view illustrating the main pipe and its welding structure in a specific embodiment of the present invention; Figure 8 This is a cross-sectional view of the mixer in the main cooling chamber in a specific embodiment of the present invention; Figure 9 This is a cross-sectional view of the mixer showing the second positioning ring in a specific embodiment of the present invention; Figure 10 for Figure 9 Enlarged view of region C in the middle; Figure 11 This is a cross-sectional view of the mixer in the secondary cooling chamber in a specific embodiment of the present invention; Figure 12 This is a cross-sectional view of the mixer in a specific embodiment of the present invention, showing the first cooling chamber; Figure 13 This is a cross-sectional view of the mixer showing the second cooling chamber in a specific embodiment of the present invention; Figure 14 for Figure 13 Enlarged schematic diagram of region D in the middle; Figure 15 This is a cross-sectional view of the mixer in a specific embodiment of the present invention, showing the first air intake channel.

[0018] In the diagram: 1. Blending and cooling section; 11. Main heat shield; 111. First annular channel; 112. First conical surface; 113. First cooling chamber; 114. First inlet channel; 115. First outlet channel; 116. First confluence channel; 117. First branch channel; 118. First reinforcing column; 119. First annular groove; 12. Air cooling panel; 121. Main cooling chamber; 122. First air inlet channel; 13. Air cooling component; 131. Secondary cooling chamber; 132. Second cooling chamber; 133. Second inlet channel; 134. Second outlet channel; 135. Second cooling... 136. Reinforcing rod; 137. Annular perforated plate; 1371. Diverter hole; 138. Second air intake channel; 139. Second annular channel; 1310. Second conical surface; 1311. Second annular groove; 1312. Third annular groove; 1313. Second mounting hole; 1314. Annular clearance groove; 14. First mounting hole; 21. Main stream pipe; 22. First positioning ring; 23. Second positioning ring; 231. Air hole; 3. First distributor; 4. Second distributor; 51. First water inlet pipe; 52. First water outlet pipe; 53. Second water inlet pipe; 54. Second water outlet pipe. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figure 1-15 As shown in the schematic embodiment of a mixer and its cooling method for an intake air heating and regulating system according to the present invention, the mixer for the intake air heating and regulating system includes at least a mixing and cooling section 1 and a plurality of main flow pipes 21. The mixing and cooling section 1 is provided with a main cooling chamber 121. One end of the main cooling chamber 121 has at least one first intake channel 122 and a first exhaust channel corresponding to each of the main flow pipes 21. The main flow pipes 21 penetrate the main cooling chamber 121, and each main flow pipe 21 is inserted into its corresponding first exhaust channel. The inner wall of the first exhaust channel and the outer wall of the main flow pipe 21 form a first annular channel 111.

[0024] When the above-mentioned mixer is in use, high-temperature and high-pressure gas is continuously introduced into all the main pipes 21, and gas with adjustable temperature and pressure is introduced into the main cooling chamber 121; the gas in the main cooling chamber 121 is ejected through multiple first annular channels 111 of the mixing and cooling section 1 and mixed with the high-temperature and high-pressure gas in the main pipe 21.

[0025] Each high-temperature, high-pressure gas entering or exiting the main flow pipe 21 is surrounded by low-temperature gas ejected from the corresponding first annular channel 111, achieving a uniform cross-distribution of hot and cold gas flows. This increases the contact area between the hot and cold gas flows, significantly improving the heat exchange efficiency and simultaneously enhancing the temperature uniformity of the gas output from the mixer. Furthermore, the cold gas flow within the main cooling chamber 121 can exchange heat with the gas flow within all the main flow pipes 21 through the pipe wall, further reducing the temperature of the gas flow within the main flow pipes 21 to ensure that the gas output from the mixer meets experimental requirements. The gas within the main cooling chamber 121 can also reduce the temperature of the mixing and cooling section 1, decreasing the likelihood of the mixer experiencing ablation, cracking, or deformation due to excessive temperature, extending its lifespan, and improving its reliability.

[0026] In some embodiments, the mixing and cooling section 1 is provided with a first cooling chamber 113, the first cooling chamber 113 having a first inlet channel 114 and a first outlet channel 115; the first cooling chamber 113 is used to uniformly cool one end face of the mixing and cooling section 1, and the first outlet channel is not connected to the first cooling chamber 113.

[0027] When the mixer is in use, the first cooling chamber 113 is close to the air inlet end of the main flow pipe 21. Cold water is continuously supplied to the first cooling chamber 113, which can continuously cool down the end face of the mixing and cooling section 1 that is directly subjected to the impact of high temperature and high pressure gas. This reduces the possibility of the end face burning, cracking, deformation, etc. due to excessive temperature when less low temperature gas is ejected from the first annular channel 111, thus extending the life of the mixer and improving its reliability.

[0028] In some embodiments, the mixing and cooling section 1 is provided with a first diversion channel 117 and a first confluence channel 116, and a plurality of first inflow channels 114 parallel to the end face of the mixing and cooling section 1 are provided around the first cooling cavity 113, all of which are connected to the first diversion channel 117; and a plurality of first outflow channels 115 parallel to the end face of the mixing and cooling section 1 are provided around the first cooling cavity 113, all of which are connected to the first confluence channel 116.

[0029] Cooling water is diverted through the first diversion channel 117 to all the first inflow channels 114, so that it enters the first cooling chamber 113 simultaneously from multiple angles; the liquid in the first cooling chamber 113 is simultaneously collected into the first confluence channel 116 from multiple angles through multiple first outflow channels 115. This design can improve the temperature uniformity of the first cooling chamber 113.

[0030] Furthermore, the first diversion channel 117 and the first confluence channel 116 are symmetrically arranged on both sides of the first cooling chamber 113. The first diversion channel 117 is connected to the first water inlet pipe 51, and the first confluence channel 116 is connected to the first water outlet pipe 52.

[0031] Furthermore, both the first water inlet pipe 51 and the first water outlet pipe 52 are welded to the mixing and cooling section 1.

[0032] In some embodiments, a plurality of first reinforcing columns 118 parallel to the axis of the first air outlet channel are uniformly arranged in the first cooling chamber 113; the two ends of the first reinforcing columns 118 are fixedly connected to the inner wall of the first cooling chamber 113.

[0033] The structural strength of the first cooling chamber 113 is improved by all the first reinforcing columns 118, the pressure bearing capacity of the first cooling chamber 113 is improved, and the reliability of the mixer is ensured.

[0034] Furthermore, the two ends of the first reinforcing column 118 are welded to the inner wall of the first cooling cavity 113.

[0035] In some embodiments, the mixing and cooling section 1 of the mixer is further provided with a secondary cooling chamber 131, and the main cooling chamber 121 is located between the secondary cooling chamber 131 and the first cooling chamber 113; the secondary cooling chamber 131 has a second air inlet channel 138 and a second air outlet channel corresponding to the main air pipe 21; the main air pipe 21 passes through the secondary cooling chamber 131, and each main air pipe 21 is inserted into its corresponding second air outlet channel, the inner wall of the second air outlet channel and the outer wall of the main air pipe 21 form a second annular channel 139; the first annular channel 111 and the second annular channel 139 are located at both ends of the mixing and cooling section 1.

[0036] When the mixer is in use, high-temperature and high-pressure gas is continuously introduced into all main flow pipes 21, and gas with adjustable temperature and pressure is introduced into the main cooling chamber 121 and the auxiliary cooling chamber 131; the gas in the main cooling chamber 121 is ejected through multiple first annular channels 111 and mixed with the high-temperature and high-pressure gas in the main flow pipe 21; the gas in the auxiliary cooling chamber 131 is ejected through multiple second annular channels 139 and mixed with the high-temperature and high-pressure gas in the main flow pipe 21.

[0037] Each stream of high-temperature, high-pressure gas entering the main flow pipe 21 is surrounded by low-temperature gas ejected from the corresponding first annular channel 111, and each stream of gas exiting the main flow pipe 21 is surrounded by low-temperature gas ejected from the corresponding second annular channel 139. This achieves a uniform cross-distribution of hot and cold gas streams, increases the contact area between them, significantly improves the heat exchange efficiency, and simultaneously significantly enhances the temperature uniformity of the gas output from the mixer. Furthermore, the cold gas streams within the main cooling chamber 121 and the secondary cooling chamber 131 can exchange heat with all the gas streams within the main flow pipe 21 through the pipe wall, further reducing the temperature of the gas streams within the main flow pipe 21 to ensure that the gas output from the mixer meets the experimental requirements. The gas within the main cooling chamber 121 and the secondary cooling chamber 131 can also reduce the temperature of the mixing and cooling section 1, reducing the possibility of the mixer experiencing ablation, cracking, or deformation due to excessive temperature, extending the mixer's lifespan, and improving its reliability.

[0038] The above method allows the low-temperature gas to be mixed with the gas flowing through the main pipe 21 in two stages, which can further improve the mixing efficiency and ensure that the temperature of the mixed gas meets the test requirements.

[0039] In some embodiments, the auxiliary cooling chamber 131 is longer than the main cooling chamber 121 in the axial direction of the mixer; for the front end of the main flow pipe 21 with the highest temperature, a shorter main cooling chamber 121 is used to reduce flow resistance, improve gas flow efficiency within the main cooling chamber 121, accelerate the cooling efficiency of the inlet end of the main flow pipe 21, reduce the possibility of the inlet end of the main flow pipe 21 being burned, cracked, or deformed due to excessive temperature, extend the life of the main flow pipe 21, and improve the reliability of the main flow pipe 21.

[0040] Furthermore, an annular perforated plate 137 is provided inside the auxiliary cooling chamber 131. The outer wall of the annular perforated plate 137 and the inner wall of the auxiliary cooling chamber 131 form an annular cavity. The second air inlet is provided on the wall of the annular cavity. The annular perforated plate 137 has a plurality of evenly distributed branch flow holes 1371. All main flow pipes 21 are evenly distributed on the inner side of the annular perforated plate 137.

[0041] The low-temperature gas in the annular chamber exchanges heat evenly with the airflow in the main flow pipe 21 in the circumferential and axial directions through the diversion orifice 1371, thereby further improving the heat exchange efficiency and ensuring the temperature uniformity of the gas output from the mixer.

[0042] In some embodiments, the mixer further includes a first distributor 3 and a second distributor 4; the mixing and cooling section 1 is provided with a plurality of first air intake channels 122 evenly distributed around the axis of the main cooling chamber 121, and all the first air intake channels 122 are connected to the first distributor 3; the mixing and cooling section 1 is provided with a plurality of second air intake channels 138 evenly distributed around the axis of the auxiliary cooling chamber 131, and all the second air intake channels 138 are connected to the second distributor 4; all the second air intake channels 138 are located on the side of the auxiliary cooling chamber 131 away from the mixing and cooling section 1.

[0043] The low-temperature gas is diverted by the first distributor 3 to multiple first air inlet channels 122 circumferentially around the main cooling chamber 121 to improve the temperature uniformity of the main cooling chamber 121. The low-temperature gas is diverted by the second distributor 4 to multiple second air inlet channels 138 circumferentially around the auxiliary cooling chamber 131 to improve the temperature uniformity of the auxiliary cooling chamber 131.

[0044] Furthermore, both the first flow divider 3 and the second flow divider 4 are welded to the mixing and cooling section 1.

[0045] In some embodiments, a plurality of reinforcing rods 136 parallel to the axis of the annular perforated plate 137 are uniformly arranged on the inner side of the annular perforated plate 137, and the two ends of the reinforcing rods 136 are fixedly connected to the inner wall of the secondary cooling chamber 131. All the reinforcing rods 136 improve the structural strength of the secondary cooling chamber 131 and ensure its reliability.

[0046] Furthermore, the two ends of the reinforcing rod 136 are welded to the inner wall of the auxiliary cooling chamber 131.

[0047] In some embodiments, the mixing and cooling section 1 is further provided with a second cooling chamber 132, the second cooling chamber 132 having a second inlet channel 133 and a second outlet channel 134; the second cooling chamber 132 is used to uniformly cool the end face of the mixing and cooling section 1 provided with the second outlet channel, and the second outlet channel and the second cooling chamber 132 are not connected to each other.

[0048] When the mixer is in use, cold water is continuously supplied to the first cooling chamber 113 and the second cooling chamber 132 to continuously cool and reduce the temperature of both ends of the mixer. This reduces the possibility of burning, cracking, deformation, or other phenomena on the two ends of the mixer due to excessive temperature when there is less low-temperature gas inside the mixer, thus extending the life of the mixer and improving its reliability.

[0049] In some embodiments, cooling water enters the second cooling chamber 132 simultaneously from multiple angles through the second inlet channel 133; the liquid in the second cooling chamber 132 simultaneously converges into the second outlet channel 134 from multiple angles. This design improves the temperature uniformity of the second cooling chamber 132.

[0050] Furthermore, the second inlet channel 133 and the second outlet channel 134 are symmetrically arranged on both sides of the second cooling chamber 132. The second inlet channel 133 is connected to the second water inlet pipe 53, and the second outlet channel 134 is connected to the second water outlet pipe 54.

[0051] Furthermore, the first diversion channel 117, the first confluence channel 116, the second inflow channel 133, and the second outflow channel 134 are arranged alternately in the circumferential direction of the mixing and cooling section 1 to improve the circumferential temperature uniformity of the mixing and cooling section 1.

[0052] Furthermore, both the second water outlet pipe 54 and the second water inlet pipe 53 are welded to the mixing and cooling section 1.

[0053] In some embodiments, a plurality of second reinforcing columns 135 are uniformly arranged within the second cooling chamber 132, parallel to the axis of the second air outlet channel; both ends of the second reinforcing columns 135 are fixedly connected to the inner wall of the second cooling chamber 132. The structural strength of the second cooling chamber 132 is improved by all the second reinforcing columns 135, thereby enhancing its pressure-bearing capacity.

[0054] Furthermore, the two ends of the second reinforcing column 135 are welded to the inner wall of the second cooling cavity 132.

[0055] In some embodiments, the blending and cooling section 1 includes a main heat shield 11, an air cooling panel 12, and an air cooling component 13, which are detachably and sealingly connected along their axial direction. The first cooling chamber 113 is located within the main heat shield 11. The main cooling chamber 121 is jointly formed by the main heat shield 11 and the air cooling panel 12. The secondary cooling chamber 131 and the second cooling chamber 132 are disposed within the air cooling component 13. The first distributor 3 is installed on the air cooling panel 12, and the second distributor 4 is installed on the air cooling component 13.

[0056] Furthermore, the main heat shield 11, the air cooling panel 12, and the air cooling component 13 are all welded structures, and the deformation during welding is required to be less than or equal to 0.5 mm. The coaxiality of the two end plates of the main heat shield 11 is less than or equal to 0.1 mm, and the coaxiality of the two end plates of the air cooling panel 12 is less than or equal to 0.02 mm.

[0057] Furthermore, all parts of the main heat shield 11, air cooling panel 12, and air cooling component 13 are machined using machine tools, with a surface roughness of less than or equal to 0.8 micrometers. The end face of the main heat shield 11 furthest from the air cooling panel 12 has a thickness of greater than or equal to 5 mm to ensure its structural strength under high temperature and high pressure impact.

[0058] Furthermore, all parts of the mixer are made of stainless steel.

[0059] In some embodiments, the first cooling chamber 113 and the second cooling chamber 132 of the blending cooling section 1 need to be subjected to a water pressure test, and their maximum bearing pressure needs to be greater than or equal to 1.5 times the test design pressure.

[0060] Furthermore, the main heat shield 11 is constructed by welding multiple components, the air cooling panel 12 is constructed by welding multiple components, and the air cooling component 13 is constructed by welding multiple components.

[0061] Furthermore, the main heat shield 11 has at least one first annular groove 119 for installing a sealing ring on its end face near the air cooling panel 12. The air cooling component 13 has at least one second annular groove 1311 for installing a sealing ring on its end face near the air cooling panel 12.

[0062] In some embodiments, a first positioning ring 22 and a second positioning ring 23 are provided on the outer side of the main flow pipe 21. The first positioning ring 22 and the second positioning ring 23 pass through the two end faces of the air cooling panel 12 and are press-fitted with the air cooling panel 12. The first positioning ring 22 abuts against the air cooling component 13. The first air outlet channel is provided on the main heat shield 11. The second positioning component is provided with a plurality of air holes 231 evenly distributed around the main flow pipe 21. The gas in the air cooling panel 12 enters the first air outlet channel at an accelerated speed through the air holes 231.

[0063] Furthermore, the interference fit between the first positioning ring 22 and the second positioning ring 23 and the air cooling panel 12 does not exceed 0.03 mm.

[0064] In some embodiments, the main heat shield 11, the air cooling panel 12, and the air cooling component 13 are detachably connected by a plurality of connectors evenly distributed along the circumference of the mixer. These connectors are either locating pins or threaded connections consisting of bolts and nuts. Each of the main heat shield 11, the air cooling panel 12, and the air cooling component 13 is provided with a first mounting hole 14 for installing the connectors.

[0065] Furthermore, the air cooling component 13 is provided with a plurality of second mounting holes 1313 distributed circumferentially along the mixer at one end away from the air cooling panel 12, so that the air cooling component 13 can be connected to other structures.

[0066] Furthermore, an annular clearance groove 1314 is provided on the outer side of the air cooling component 13, and the first mounting hole 14 and the second mounting hole 1313 are respectively located on both sides of the annular clearance groove 1314.

[0067] Furthermore, a third annular groove 1312 is provided at the end of the air cooling component 13 away from the air cooling panel 12 to install a sealing ring and achieve a sealed connection between the air cooling component 13 and other structures.

[0068] In some embodiments, a first conical surface 112 is provided on the side of the first exhaust channel near the main cooling chamber 121 to guide the gas in the main cooling chamber 121 into the first exhaust channel. A second conical surface 1310 is provided on the side of the second exhaust channel near the auxiliary cooling chamber 131 to guide the gas in the auxiliary cooling chamber 131 into the second exhaust channel.

[0069] In some embodiments of this application, a cooling method for an intake air heating and regulating system is also provided, using a mixer of the intake air heating and regulating system described in any of the above embodiments or any combination of embodiments, and a combustion chamber; the combustion chamber is detachably connected to the mixing and de-cooling section 1 of the mixer, and the first cooling chamber 113 of the mixer is located between the combustion chamber and the main de-cooling chamber 121 of the mixing and de-cooling section 1; Cold water is continuously supplied to the first cooling chamber 113, and gas with adjustable temperature and pressure is supplied to the main cooling chamber 121; the high-temperature and high-pressure gas in the combustion chamber enters multiple main flow pipes 21 of the mixer; the gas in the main cooling chamber 121 is ejected through multiple first annular channels 111 of the mixing and cooling section 1 and mixed with the high-temperature and high-pressure gas in the main flow pipe 21.

[0070] In some embodiments of this application, a cooling method for an intake air heating and regulating system is provided, using an intake air heating and regulating system mixer and a combustion chamber; the intake air heating and regulating system mixer includes all the features of the intake air heating and regulating system mixer described in all the above embodiments.

[0071] The combustion chamber is detachably connected to the mixing and de-heating section 1 of the mixer, and the first cooling chamber 113 of the mixer is located between the combustion chamber and the main de-heating chamber 121 of the mixing and de-heating section 1; Cold water is continuously supplied to the first cooling chamber 113 and the second cooling chamber 132, and gas with adjustable temperature and pressure is supplied to the main cooling chamber 121 and the auxiliary cooling chamber 131; the high-temperature and high-pressure gas in the combustion chamber enters multiple main flow pipes 21 of the mixer; the gas in the main cooling chamber 121 is ejected through multiple first annular channels 111 of the mixing and cooling section 1 and mixed with the high-temperature and high-pressure gas in the main flow pipe 21; the gas in the auxiliary cooling chamber 131 is ejected through multiple second annular channels 139 of the mixing and cooling section 1 and mixed with the high-temperature and high-pressure gas in the main flow pipe 21.

[0072] Through the description of several embodiments of the mixer and cooling method for an intake air heating and regulating system of the present invention, it can be seen that the embodiments of the mixer and cooling method for an intake air heating and regulating system of the present invention have at least one or more of the following advantages: 1. The high-temperature, high-pressure gas in the combustion chamber enters multiple main flow pipes of the mixer. Each main flow pipe is surrounded by low-temperature gas ejected from a corresponding first and second annular channel, achieving a uniform cross-distribution of hot and cold gas streams. This increases the contact area between the hot and cold gas streams, significantly improving the heat exchange efficiency and the temperature uniformity of the mixer's output gas. Furthermore, the cold gas streams in the main and auxiliary cooling chambers exchange heat with the gas streams in all main flow pipes through the pipe walls, further reducing the temperature of the gas streams within the main flow pipes to ensure the gas output from the mixer meets experimental requirements. The gas in the main and auxiliary cooling chambers also reduces the temperature of the mixing and cooling section, decreasing the likelihood of the mixer experiencing ablation, cracking, or deformation due to excessive temperature, extending its lifespan, and improving its reliability.

[0073] 2. Continuously supplying cold water to the first cooling chamber and the second cooling chamber can continuously cool and reduce the temperature of both ends of the mixer, thereby reducing the possibility of ablation, cracking, deformation, and other phenomena on the two ends of the mixer due to excessive temperature when there is less low-temperature gas in the mixer, extending the life of the mixer and improving its reliability.

[0074] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A mixer for an intake air heating and regulating system, characterized in that, include: The mixing and cooling section (1) and multiple main flow pipes (21) are provided. The mixing and cooling section (1) is provided with a main cooling chamber (121). One end of the main cooling chamber (121) has at least one first air inlet channel (122) and a first air outlet channel corresponding to each of the main flow pipes (21). The main flow pipes (21) pass through the main cooling chamber (121). Each main flow pipe (21) is inserted into its corresponding first air outlet channel. The inner wall of the first air outlet channel and the outer wall of the main flow pipe (21) form a first annular channel (111).

2. A mixer for an intake air heating and regulating system according to claim 1, characterized in that, The mixing and cooling section (1) is provided with a first cooling chamber (113), which has a first inlet channel (114) and a first outlet channel (115). The first cooling chamber (113) is used to uniformly cool one end face of the mixing and cooling section (1), and the first outlet channel is not connected to the first cooling chamber (113).

3. A mixer for an intake air heating and regulating system according to claim 2, characterized in that, The mixing and cooling section (1) is provided with a first diversion channel (117) and a first confluence channel (116). Multiple first inflow channels (114) are arranged around the first cooling cavity (113) parallel to the end face of the mixing and cooling section (1), and all first inflow channels (114) are connected to the first diversion channel (117). Multiple first outflow channels (115) are arranged around the first cooling cavity (113) parallel to the end face of the mixing and cooling section (1), and all first outflow channels (115) are connected to the first confluence channel (116).

4. A mixer for an intake air heating and regulating system according to claim 3, characterized in that, The first cooling chamber (113) is uniformly provided with a plurality of first reinforcing columns (118) parallel to the axis of the first air outlet channel; the two ends of the first reinforcing columns (118) are fixedly connected to the inner wall of the first cooling chamber (113).

5. A mixer for an intake air heating and regulating system according to any one of claims 2-4, characterized in that, The mixing and cooling section (1) is also provided with a secondary cooling chamber (131), and the main cooling chamber (121) is located between the secondary cooling chamber (131) and the first cooling chamber (113). The secondary cooling chamber (131) has a second air inlet channel (138) and a second air outlet channel corresponding to the main air pipe (21). The main air pipe (21) passes through the secondary cooling chamber (131), and each main air pipe (21) is inserted into its corresponding second air outlet channel. The inner wall of the second air outlet channel and the outer wall of the main air pipe (21) form a second annular channel (139). The first annular channel (111) and the second annular channel (139) are located at both ends of the mixing and cooling section (1).

6. A mixer for an intake air heating and regulating system according to claim 5, characterized in that, In the axial direction of the mixer, the secondary reduction chamber (131) is longer than the main reduction chamber (121); an annular perforated plate (137) is provided inside the secondary reduction chamber (131), the outer wall of the annular perforated plate (137) and the inner wall of the secondary reduction chamber (131) form an annular cavity, the second air inlet is provided on the wall of the annular cavity, and all the main flow pipes (21) are evenly distributed on the inner side of the annular perforated plate (137).

7. A mixer for an intake air heating and regulating system according to claim 6, characterized in that, It also includes a first distributor (3) and a second distributor (4); the mixing and de-cooling section (1) is provided with a plurality of first air intake channels (122) evenly distributed around the axis of the main de-cooling chamber (121), and all the first air intake channels (122) are connected to the first distributor (3); the mixing and de-cooling section (1) is provided with a plurality of second air intake channels (138) evenly distributed around the axis of the auxiliary de-cooling chamber (131), and all the second air intake channels (138) are connected to the second distributor (4); all the second air intake channels (138) are located on the side of the auxiliary de-cooling chamber (131) away from the mixing and de-cooling section (1).

8. A mixer for an intake air heating and regulating system according to claim 6, characterized in that, The inner side of the annular perforated plate (137) is uniformly provided with a plurality of reinforcing rods (136) parallel to the axis of the annular perforated plate (137), and the two ends of the reinforcing rods (136) are fixedly connected to the inner wall of the auxiliary cooling chamber (131).

9. A mixer for an intake air heating and regulating system according to claim 5, characterized in that, The mixing and cooling section (1) is provided with a second cooling chamber (132), which has a second inlet channel (133) and a second outlet channel (134). The second cooling chamber (132) is used to uniformly cool the end face of the mixing and cooling section (1) provided with the second outlet channel. The second outlet channel is not connected to the second cooling chamber (132). A plurality of second reinforcing columns (135) are uniformly arranged inside the second cooling chamber (132). The two ends of the second reinforcing columns (135) are fixedly connected to the inner wall of the second cooling chamber (132).

10. A cooling method for an intake air heating and regulating system, characterized in that, It includes a mixer of the intake air heating and regulating system as described in any one of claims 2-9, and a combustion chamber; the combustion chamber is detachably connected to the mixing and de-heating section (1) of the mixer, and the first cooling chamber (113) of the mixer is located between the combustion chamber and the main de-heating chamber (121) of the mixing and de-heating section (1); Cold water is continuously supplied to the first cooling chamber (113), and gas with adjustable temperature and pressure is supplied to the main cooling chamber (121); the high-temperature and high-pressure gas in the combustion chamber enters multiple main flow pipes (21) of the mixer; the gas in the main cooling chamber (121) is ejected through multiple first annular channels (111) of the mixing and cooling section (1) and mixed with the high-temperature and high-pressure gas in the main flow pipe (21).

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