Integrated active heat exchange metal rotary body high temperature and high pressure pneumatic rectification premixing device

Abstract

The application discloses an integrated high-temperature and high-pressure resistant aerodynamic rectification premixing device of a metal rotary body, which comprises an outer wall surface, a central body and a support, wherein the head of the central body is a conical body structure, the outer wall surface is an annular structure, and the outer wall surface is coaxially arranged outside the central body and close to the head; the outer wall surface surrounds the central body to form an annular gas passage, and the outer wall surface also serves as an outer frame of the device; the front end of the outer wall surface is provided with an annular outer wall force bearing surface; a plurality of supports distributed in a radial manner are arranged in the circumferential direction of the gas flow passage between the outer wall surface and the central body, so that the load of the central body is transmitted to the outside through the outer wall surface; cage-shaped heat exchange channels are arranged on the outer wall surface and the central body, support inner flow channels which are connected with the cage-shaped heat exchange channels are arranged in the supports, heat exchange working medium interfaces are arranged on the supports and the outer wall surface, and the heat exchange working medium interfaces are used for being connected with external working medium sources; the central body is a hollow structure, and an internal part of the central body is used for mounting external devices.

Description

Technical Field

[0001] This invention belongs to the field of high-speed aircraft design, specifically relating to an integrated active heat exchange metal rotating body high temperature and high pressure resistant aerodynamic rectification premixing device. Background Technology

[0002] In the simulation of incoming flow conditions for high-speed aircraft, as the speed of the power system continues to increase, its incoming flow conditions gradually tend to exhibit the comprehensive characteristics of high temperature, high pressure, high speed, and high heat flux density. It is difficult for the test piece to simultaneously meet the conditions of high temperature resistance, high pressure, long-term operation, and repeated use. Due to sealing and tolerance issues, the parts that are machined separately usually leak and loosen after high temperature, high pressure, long-term operation, and repeated use. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated active heat exchange metal rotating body high temperature and high pressure resistant aerodynamic rectification premixing device for simulating the incoming flow conditions of high-speed aircraft. It can be used as a test device or as a power system component.

[0004] To achieve the above objectives, the present invention employs the following technical solution: The integrated active heat exchange metal rotating body high-temperature and high-pressure pneumatic rectifier premixing device includes an outer wall, a central body, and a support frame, wherein: The head of the central body is a conical structure, and the outer wall is a ring structure, coaxially arranged around the outside of the central body near the head. The outer wall forms a ring-shaped gas channel outside the central body, and also serves as the external frame of the device. The front end of the outer wall is provided with a ring-shaped load-bearing surface to bear axial tension / compression and to achieve the installation and fixation of the device. Multiple radially distributed supports are arranged in the circumferential direction within the gas flow channel between the outer wall and the central body, transferring the load of the central body to the outside through the outer wall. Cage-shaped heat exchange channels are provided on both the outer wall and the central body, and the supports have internal flow channels that connect to the cage-shaped heat exchange channels. Heat exchange working medium interfaces are provided on both the supports and the outer wall for connecting to an external working medium source. The central body is a hollow structure, and the interior is used to install external devices.

[0005] Furthermore, the gas channel profile is designed according to the airflow conditions; holes are made in the gas channel as needed for working fluid injection to achieve the gas / liquid mixing target.

[0006] Furthermore, the size of the gas channel is determined according to the gas state required for the outlet, and different outlet flow states can be achieved through calculation; the side of the gas channel near the front end of the central body is the high-temperature and high-pressure gas inlet, and the other end is the outlet.

[0007] Furthermore, the outer surface of the support is connected to the outer wall and protrudes, while the inner surface of the support is connected to the outer surface of the central body; the outer contour of the support has a two-dimensional spindle-shaped structure to reduce flow resistance.

[0008] Furthermore, multiple liquid-cooled fluid channels 1 are distributed circumferentially inside the outer wall surface. The liquid-cooled fluid channels 1 are connected by converging rings at the front and rear ends of the outer wall surface to form a cage-like heat exchange channel. A liquid-cooled fluid channel 2 is provided on the central body, and a liquid-cooled fluid channel 3 is provided at its head and tail ends to connect with the ends of the liquid-cooled fluid channel 2. An annular converging ring is provided on the inner wall of the central body, which is connected to the liquid-cooled fluid channel 3 and the liquid-cooled fluid channel 2 to form a cage-like heat exchange channel, so as to ensure the uniformity of the cooling working fluid flow. Both the liquid-cooled fluid channel 3 and the liquid-cooled fluid channel 2 are arranged axially.

[0009] Furthermore, the support is provided with a heat exchange medium interface one, and the front and rear end of the outer wall are provided with heat exchange medium interface two. Heat exchange medium interface one and heat exchange medium interface two are used to connect with an external working medium source to form a cooling working medium driven cycle.

[0010] Furthermore, through holes are drilled inside the bracket to connect the power and data cables of external devices inside the center cavity to the outside, thereby making use of the space inside the center cavity to install testing equipment or gas and heat generation equipment.

[0011] Furthermore, the diameter, spacing, and flow parameters of each liquid cooling fluid channel and manifold need to be pre-calculated or simulated based on the incoming flow state of the high-temperature and high-pressure gas. During use, the incoming flow state should be kept near the design state.

[0012] Furthermore, temperature and optical measuring instruments are installed in the inner cavity of the central body to obtain temperature and optical data of the high-temperature and high-pressure gas in the gas channel, thereby analyzing its flow and combustion characteristics.

[0013] Furthermore, after the high-temperature and high-pressure gas flows through the head of the central body, it enters the gas channel and flows out of the device under the designed operating conditions. By opening holes at preset positions on the gas channel for working fluid injection, gas / liquid mixing in the gas channel is achieved and transported downstream. The head of the central body is the central load-bearing surface, which bears part of the stagnant pressure. The load of the incoming flow is transferred to the external pipeline by the support through the outer wall surface and the outer wall load-bearing surface. Heat exchange is carried out using the cage-like heat exchange channels and cooling working fluid on the central body and the outer wall surface. The external working fluid source drives the cooling working fluid circulation through heat exchange working fluid interface one and heat exchange working fluid interface two.

[0014] Furthermore, after the device is manufactured, air pressure and hydraulic pressure tests are performed to ensure that there is no blockage or leakage in the gas passage and the cage-shaped heat exchange passage, and that the pressure drop under design conditions is within the expected range. During installation, the outer wall bearing surface should be clamped at the flange connection position, or it can be directly used as the flange face to connect with the front flange face. According to its high-temperature and long-term working requirements, high-temperature resistant sealing materials should be used for sealing. After each operation or test, the connection of the outer wall bearing surface should be inspected.

[0015] A high-speed aircraft, wherein the propulsion system of the high-speed aircraft employs the aforementioned integrated active heat exchange metal rotating body high temperature and high pressure resistant aerodynamic rectification premixing device.

[0016] Compared with the prior art, the present invention has the following technical features: 1. This invention is manufactured using metal additive manufacturing. The integrated structure ensures a high stress limit for the support, which can withstand the scouring of high-pressure airflow and achieve flow rectification under harsh working conditions. The integrated structure avoids internal sealing and structural loosening of the device, and the same coefficient of linear expansion ensures low thermal stress of the structure at high temperatures.

[0017] 2. The annular flow channel formed by the outer wall and the central body can be designed with different cross sections in the flow direction, and holes can be opened on the wall to facilitate gas / liquid two-phase premixing in the annular flow channel; 3. Liquid cooling channels are arranged on the outer wall and inside the central body. The inner and outer channels form a connected loop through the support. The overall thermal balance of the device can be achieved by an external working fluid source, thus maintaining the integrity of the structure. 4. The interior of the center is a hollow cavity, which can be used to install testing equipment, or external devices such as heat sources and mass sources as needed. The temperature of the cavity is regulated by the flow rate of the working fluid in the cooling channel. Power and data transmission are led out to the outer wall of the device through the through holes inside the bracket. Attached Figure Description

[0018] Figure 1 This is the overall structural framework of the device of the present invention; Figure 2 This is the liquid working fluid cooling pipeline of the device of the present invention; Figure 3 This refers to the location of the gas / liquid channels and cavities inside the device of the present invention; Figure 4 This is a cross-sectional view of the device containing the cooling channel according to the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Central body; 2. Support; 3. Outer wall surface; 4. Outer wall bearing surface; 5. Heat exchange medium interface 1; 6. Heat exchange medium interface 2; 7. Liquid cooling fluid channel 3; 8. Liquid cooling fluid channel 1; 9. Liquid cooling fluid channel 2; 10. Manifold ring; 11. Central bearing surface; 12. Gas channel; 13. Inner cavity; 14. Inner flow channel of the support. Detailed Implementation

[0020] This invention provides an integrated, active heat exchange metal rotating body high-temperature and high-pressure pneumatic rectification premixing device. It is primarily applicable to situations requiring simulated high-temperature and high-pressure inflow environments and specific locations for gas-liquid two-phase premixing. This invention utilizes a compact metal additive manufacturing process to achieve one-piece machining of the inner and outer walls from the same material, with interconnected internal cooling channels. Furthermore, it maximizes stress dispersion through a uniformly distributed support structure. The cooling medium is regenerated and reused, completing both gas-liquid mixing and inflow rectification functions. It can operate for extended periods and be reused multiple times, meeting specific research and engineering application needs and possessing broad application prospects.

[0021] This invention is applicable to the simulation of extreme high-speed incoming flow environments, where flow rectification and state constraints are required, typically used in environments with long-term operation above 1000°C. The device rectifys the flow to achieve a uniform airflow at the outlet, and gas-liquid two-phase premixing can be performed within the annular channel, thus achieving predetermined scientific research or engineering objectives.

[0022] See Figures 1 to 4 The integrated active heat exchange metal rotating body high temperature and high pressure pneumatic rectification premixing device provided by the present invention is formed by high temperature metal additive manufacturing technology, and includes an outer wall surface 3, a central body 1, and a support 2, wherein: The head of the central body 1 is a conical structure, while the rest is a columnar structure. The head of the central body 1 is a central load-bearing surface 11, used to transmit airflow loads. The outer wall surface 3 is an annular structure, coaxially arranged around the outside of the central body 1 near the head. The outer wall surface 3 forms an annular gas channel 12 outside the central body 1, and also serves as the external frame of the device. The size of the gas channel 12 is determined according to the required gas state at the outlet, and different outlet flow states can be achieved through calculation. The side of the gas channel 12 closest to the front end of the central body is the high-temperature and high-pressure gas inlet, and the other end is the outlet. The front end of the outer wall surface 3 is provided with an annular outer wall load-bearing surface 4 to bear axial tension / compression and to connect the device to external pipelines.

[0023] Multiple supports 2 are arranged circumferentially in the gas flow channel between the outer wall surface 3 and the central body 1. The supports 2 are distributed radially. The outer surface of the supports 2 is connected to the outer wall surface 3 and protrudes. The inner surface of the supports 2 is connected to the outer surface of the central body 1. The outer contour of the supports 2 has a two-dimensional spindle-shaped structure to reduce flow resistance.

[0024] The central body 1 is the main heat-bearing and stress-bearing component. The conical shape at the head of the central body 1 is designed to reduce drag, and the tail is also a conical shape with a drag-reducing surface if there are no external devices. That is, the conical shape at the tail of the central body 1 can also be replaced by other external devices of the power system.

[0025] The total pressure of the high-temperature and high-pressure gas flow is applied to the head of the central body 1. There is a large pressure difference and a certain temperature difference between the front and back of the central body 1. The central body 1 is kept stable by the support 2. The support 2 converts the pressure difference between the central body 1 and the outer wall surface 3 into axial force and transmits it to the outer wall surface 3 through the support 2. The outer wall surface 3 transmits the force to the external pipeline through the bearing surface 4. Therefore, the shear strength of the support 2 at high temperature needs to be checked. The outer surface of the central body 1 and the inner surface of the outer wall surface 3 form an annular gas channel 12. The shape of the gas channel 12 can be designed according to the airflow state. Other working fluids can be injected by opening holes at specific positions in the gas channel 12 as needed to achieve more complex mixing objectives.

[0026] The device is made of metal. Under high incoming pressure, if the temperature of the high-temperature, high-pressure gas flow approaches the melting point of the device material, its own heat sink and thermal conduction alone cannot maintain the structural strength in a thermal equilibrium state, posing a risk of structural failure. Therefore, all wall structures of the device are internally equipped with liquid-cooled fluid channels, using a cooling medium (such as kerosene) to cool the device itself, ensuring that the temperature of the material at the gas flow contact surface remains below a safe value. Figure 2 As shown, where: Multiple liquid-cooled fluid channels 1-8 are distributed circumferentially inside the outer wall surface 3. The liquid-cooled fluid channels 1-8 are connected by the confluence rings 10 at the front and rear ends of the outer wall surface 3 to form a cage-like heat exchange channel. A liquid-cooled fluid channel 2-9 is provided on the central body 1, and a liquid-cooled fluid channel 3-7 is provided at its head and tail ends to connect with the ends of the liquid-cooled fluid channel 2-9. An annular confluence ring 10 is provided on the inner wall of the central body 1, which is connected to the liquid-cooled fluid channel 3-7 and the liquid-cooled fluid channel 2-9 to form a cage-like heat exchange channel to ensure the uniformity of the cooling fluid flow. The liquid-cooled fluid channel 3-7 and the liquid-cooled fluid channel 2-9 are both arranged axially. All liquid-cooled fluid channels are formed by additive printing.

[0027] The support 2 has an internal flow channel 14 for connecting the central body 1 and the cage-like heat exchange channel on the outer wall 3. The support 2 has a heat exchange medium interface 5, and the front and rear end confluence rings 10 of the outer wall 3 have heat exchange medium interfaces 6. Heat exchange medium interfaces 5 and 6 are used to connect to an external working medium source to form a cooling working medium driven circulation. The inlet and outlet directions of heat exchange medium interfaces 5 and 6 are specified according to actual needs.

[0028] The diameter, spacing, flow rate, and other parameters of liquid-cooled fluid channels 7, 8, 2, and 10 need to be pre-calculated or simulated based on the incoming flow state of the high-temperature and high-pressure gas. When using them, the incoming flow state should be kept near the design state; otherwise, the device may still fail due to overheating.

[0029] The central body 1 is a hollow structure. Depending on actual needs, for scenarios requiring additional temperature and optical measuring instruments, these external devices are installed in the inner cavity 13 of the central body 1 to obtain temperature and optical data of the high-temperature and high-pressure gas in the gas channel 12, thereby analyzing its flow and combustion characteristics. Alternatively, heat sources, mass sources, etc., can be installed to further process the high-temperature and high-pressure gas. This device can be used as a functional component of the test device or installed on the test sample to achieve its function. The temperature of the inner cavity 13 is maintained within the allowable range by the liquid-cooled fluid channel 2 9.

[0030] In operation, this invention installs the device at the working position to achieve local rectification and multiphase mixing of the high-temperature, high-pressure incoming flow. It can withstand a large total incoming flow pressure and transfer the load of the central body 1 to the external pipeline. For example... Figure 3 As shown, the high-temperature, high-pressure gas flows through the head of the central body 1 and enters the gas channel 12, then flows out of the device under designed operating conditions. Working fluid is injected through pre-drilled holes in the gas channel 12, achieving gas / liquid mixing within the channel and transporting it downstream for other functions. The central load-bearing surface 11 bears part of the stagnant pressure, and the load of the incoming flow is transferred to the external pipeline by the support 2 through the outer wall surface 3 and the outer wall load-bearing surface 4. Heat exchange is achieved using the cage-like heat exchange channel and cooling working fluid on the central body 1 and the outer wall surface 3. An external working fluid source drives the cooling working fluid circulation using heat exchange working fluid interface 5 and heat exchange working fluid interface 6. The support 2 simultaneously bears the structural load transfer function and connects the cage-like heat exchange channel; its high-temperature structural strength requires special verification. Through holes can be drilled inside the support 2 to connect the power and data lines of external devices in the inner cavity 13 of the central body 1 to the outside, maximizing the space utilization of the inner cavity 13 of the central body 1, and installing external devices such as testing equipment or gas / heat generation equipment to achieve more complex extended functions.

[0031] After the device is manufactured, air pressure and hydraulic pressure tests should be performed to ensure that there is no blockage or leakage in the gas passage 12 and the cage-shaped heat exchange passage, and that the pressure drop under design conditions is within the expected range. During installation, the outer wall bearing surface 4 should be clamped at the flange connection position, or directly connected to the front flange face as the flange face. According to its high-temperature and long-term operation requirements, high-temperature resistant sealing materials such as flexible graphite should be used for sealing. After each operation or test, the connection of the outer wall bearing surface 4 should be inspected to ensure that the device structure is intact and the seal is intact.

[0032] In one embodiment of the present invention, a high-speed air-breathing power system requires a specific incoming flow state to complete the working characteristic analysis of a certain operating condition. This device can realize the rectification and premixing of the incoming flow in simulated flight state and can adapt to long-term working conditions.

[0033] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An integrated active heat exchange metal rotating body high-temperature and high-pressure resistant pneumatic rectifier premixing device, characterized in that, It includes an outer wall surface (3), a central body (1), and a support (2), wherein: The head of the central body (1) is a conical structure, and the outer wall surface (3) is an annular structure, coaxially arranged around the outside of the central body (1) near the head; the outer wall surface (3) forms an annular gas channel (12) outside the central body (1), and at the same time, the outer wall surface (3) also serves as the external frame of the device; the front end of the outer wall surface (3) is provided with an annular outer wall bearing surface (4) to bear axial tension / compression and to realize the installation and fixation of the device; the gas flow channel between the outer wall surface (3) and the central body (1) Multiple radially distributed supports (2) are arranged in the inner circumference direction to transfer the load of the central body (1) to the outside through the outer wall surface (3); cage-shaped heat exchange channels are provided on both the outer wall surface (3) and the central body (1), and the support (2) is provided with an inner flow channel (14) that connects to the cage-shaped heat exchange channels; heat exchange working medium interfaces are provided on both the support (2) and the outer wall surface (3) for connecting to an external working medium source; the central body (1) is a hollow structure and is used to install external devices inside.

2. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, The shape of the gas channel (12) needs to be designed according to the airflow state; holes are opened in the gas channel (12) as needed to inject the working fluid and achieve the goal of gas / liquid mixing.

3. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, The outer surface of the support (2) is connected to the outer wall (3) and protrudes, and the inner surface of the support (2) is connected to the outer surface of the central body (1); the outer contour of the support (2) is a two-dimensional spindle structure to reduce flow resistance.

4. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, Multiple liquid-cooled fluid channels 1 (8) are distributed along the circumferential direction inside the outer wall surface (3). The liquid-cooled fluid channels 1 (8) are connected by the confluence rings (10) at the front and rear ends of the outer wall surface (3) to form a cage-like heat exchange channel. A liquid-cooled fluid channel 2 (9) is provided on the central body (1), and a liquid-cooled fluid channel 3 (7) is provided at its head and tail to connect with the end of the liquid-cooled fluid channel 2 (9). An annular confluence ring (10) is provided on the inner wall of the central body (1), which is connected with the liquid-cooled fluid channel 3 (7) and the liquid-cooled fluid channel 2 (9) to form a cage-like heat exchange channel, so as to ensure the uniformity of the cooling working fluid flow. The liquid-cooled fluid channel 3 (7) and the liquid-cooled fluid channel 2 (9) are both arranged along the axial direction.

5. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, The bracket (2) is provided with a heat exchange medium interface 1 (5), and the front and rear end of the manifold ring (10) of the outer wall (3) are provided with a heat exchange medium interface 2 (6). The heat exchange medium interface 1 (5) and the heat exchange medium interface 2 (6) are used to connect with an external working medium source to form a cooling working medium drive cycle.

6. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, A through hole is drilled in the bracket (2) to connect the power supply and data line of the external device in the inner cavity (13) of the central body (1) to the outside, so as to realize the space utilization of the inner cavity (13) of the central body (1) and install testing equipment or gas and heat generation equipment.

7. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, Temperature and optical measuring instruments are installed in the inner cavity (13) of the central body (1) to obtain temperature and optical data of high-temperature and high-pressure gas in the gas channel (12) for analysis of flow characteristics and combustion characteristics.

8. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 5, characterized in that, After passing through the head of the central body (1), the high-temperature and high-pressure gas flows into the gas channel (12) and then flows out of the device under the designed operating conditions. By opening holes at preset positions on the gas channel (12) to inject the working medium, the gas / liquid in the gas channel (12) is mixed and transported downstream. The head of the central body (1) is the central bearing surface (11), which bears part of the stagnant pressure. The load of the incoming flow is transferred to the external pipeline by the support (2) through the outer wall surface (3) and the outer wall bearing surface (4). Heat exchange is carried out using the cage-shaped heat exchange channel and the cooling working medium on the central body (1) and the outer wall surface (3). The external working medium source drives the cooling working medium circulation using the heat exchange working medium interface one (5) and the heat exchange working medium interface two (6).

9. The integrated active heat exchange metal rotating body high temperature and high pressure resistant pneumatic rectification premixing device according to claim 1, characterized in that, After the device is processed, air pressure and hydraulic pressure tests are performed to ensure that there is no blockage or leakage in the gas passage (12) and the cage heat exchange passage, and that the pressure drop under design conditions is within the expected range. During the installation process, the outer wall bearing surface (4) should be clamped at the flange connection position, or it can be directly used as the flange face to connect with the front flange face. According to its high temperature and long-term working requirements, high temperature resistant sealing material should be used for sealing. After each work or test, the connection of the outer wall bearing surface (4) should be inspected.

10. A high-speed aircraft, wherein the power system of the high-speed aircraft employs an integrated active heat exchange metal rotating body high temperature and high pressure resistant aerodynamic rectification premixing device according to any one of claims 1-9.

Images