A method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction

Abstract

The present invention discloses a method for generating high-speed and high-temperature airflow by using laser irradiation and heat conduction, comprising the following steps: using an infrared laser as an energy source, irradiating the laser through a laser incident window on a pressure gas tank body to an impeller inside the pressure gas tank body, the impeller being heated by the laser irradiation and generating heat; the pressure gas tank body is provided with a tapered airflow inlet end and an airflow outlet end with a gradually decreasing diameter at both ends along the axial direction, the external airflow enters the pressure gas tank body from the tapered airflow inlet end, the airflow velocity is reduced, the airflow is heated and pressurized when passing through the impeller heated by laser irradiation, and finally passes through the tapered airflow outlet end, so that the high-temperature airflow speed is increased to obtain a high-speed and high-temperature airflow. It is pollution-free when working, occupies a small space, consumes relatively little energy, does not require long-term preliminary preparation work, and can quickly generate high-temperature and high-speed airflow.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure airflow preparation, and in particular to a method for generating high-speed and high-temperature airflow by utilizing laser irradiation and heat conduction. Background Art

[0002] High-speed and high-temperature airflow is widely used in metallurgy, manufacturing, processing and other industries, effectively ensuring the normal execution of the above-mentioned processes. For example, in the iron-making process, high-speed and high-temperature airflow can be used to preheat and blow air for blast furnaces; in the steel-making process, high-speed and high-temperature airflow can be used to supply oxygen for converters and electric furnaces; in the field of material testing, high-speed and high-temperature jets can be formed to simulate certain special environments for testing sample materials.

[0003] However, the methods for preparing high-speed and high-temperature airflow in industrial production are mainly the following:

[0004] 1. Heat storage method: Heat storage materials are used to heat the air, but the maximum temperature is limited by the material, the test time is limited by the volume of the heat storage body, and the construction, maintenance and use fees are high, which is not economical enough. In addition, due to the long preparation time for heat storage, the test interval is long.

[0005] 2. Combustion and electric auxiliary heating: Combustion usually uses a hot air furnace to burn fuel in the combustion chamber and is highly purified to produce hot air to meet the needs of specific fields; electric auxiliary heating uses an air compressor and an electric heating device to compress the airflow to a high-pressure state, and the pressurized airflow is supplemented with heat by the heating device to produce a high-temperature and high-pressure airflow that meets the temperature and pressure conditions, and then releases it in a directional manner to produce a high-speed and high-temperature airflow. These two methods waste a lot of energy, and due to the limitations of the mechanical pressure resistance, temperature resistance, and mechanical weight or size requirements, the airflow speed generated is not very high, and the utilization value is low.

[0006] 3. Shock wave / piston compression: Using shock waves or pistons to adiabatically compress the airflow can achieve high temperatures, but the available time is short, there are certain requirements for the test equipment, and it is more difficult to conduct propulsion tests. For large equipment, the inflation preparation time is relatively long. Summary of the invention

[0007] In order to solve the defects of the existing high-speed and high-temperature airflow preparation method, the present invention provides a method for generating high-speed and high-temperature airflow by using laser irradiation heat conduction. The method is pollution-free, occupies a small space, consumes relatively little energy, does not require long-term preliminary preparation work, and can quickly generate high-temperature and high-speed airflow.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides a method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction, comprising the following steps:

[0010] An infrared laser is used as an energy source, which is irradiated onto an impeller inside the pressure gas tank through a laser incident window on the pressure gas tank body, and the impeller is heated by the laser irradiation and generates heat;

[0011] The two ends of the pressure gas tank body along the axial direction are respectively formed with a conical airflow inlet end and an airflow outlet end with a gradually decreasing diameter. The external airflow enters the pressure gas tank body from the conical airflow inlet end, and the airflow velocity is reduced. When the airflow passes through the impeller heated by laser irradiation, it is heated, increased in temperature and pressurized, and finally passes through the conical airflow outlet end, so that the high-temperature airflow is accelerated to obtain a high-speed and high-temperature airflow.

[0012] Using the above technical solution:

[0013] In the present invention, an infrared nanosecond continuous laser is used as an energy input source, which is continuously irradiated to the impeller inside the pressure tank through the laser incident window on the pressure tank, so that the impeller generates high temperature. At the same time, when the external airflow (which can be a heated low-temperature airflow or an unheated room temperature airflow) enters the pressure tank through the tapered airflow inlet end, as the pipe diameter gradually increases, the airflow velocity decreases, and the airflow with reduced velocity fully exchanges heat with the impeller, the airflow is heated and pressurized, and when the heated and pressurized airflow flows out through the tapered airflow outlet end, as the pipe diameter decreases, the flow velocity increases, the kinetic energy of the fluid increases, and a high-speed and high-temperature airflow is obtained.

[0014] Furthermore, the impeller includes an annular tungsten-rhenium alloy plate and a copper plate. The annular tungsten-rhenium alloy plate is coaxially installed inside the pressure gas tank body. Multiple copper sheets are installed side by side in the axial direction inside the annular tungsten-rhenium alloy plate. Multiple through holes for air flow are formed on the surface of the copper sheet. The laser generated by the infrared laser passes through the laser incident window on the pressure gas tank body and irradiates the annular tungsten-rhenium alloy plate. The annular tungsten-rhenium alloy plate generates heat, and the heat is conducted to the inside of the pressure gas tank body through the multiple copper sheets inside the annular tungsten-rhenium alloy plate.

[0015] In order to quickly and evenly conduct the heat energy generated by the laser irradiation to the impeller to the inside or around the pressure gas tank body, so as to ensure the rapid and uniform heating of the incoming airflow, the structure of the impeller is optimized and designed, and a structure of annular tungsten-rhenium alloy plate and copper plate is adopted. The annular tungsten-rhenium alloy plate is an annular plate structure made of tungsten-rhenium alloy. Tungsten-rhenium alloy has high melting point, high thermal conductivity, high strength and plasticity, fewer cracks and holes, good radiation resistance and fracture resistance. The annular tungsten-rhenium alloy plate is coaxially installed in the pressure gas tank body. As the receptor of laser irradiation, it has a long service life and good thermal conductivity. It generates high temperature instantly under the irradiation of laser, and quickly conducts and disperses the heat to the inside of the pressure gas tank through the copper plate inside the annular tungsten-rhenium alloy plate, so that the airflow passing through the pressure gas tank is continuously and evenly heated. At the same time, the pressure in the tank will increase with the temperature inside the tank. On the other hand, the copper plate quickly conducts the heat generated instantly on the annular tungsten-rhenium alloy plate, reduces the influence of local overheating and thermal stress, and protects the annular tungsten-rhenium alloy plate.

[0016] Furthermore, at least one laser incident window is provided on the pressure gas tank body along the circumferential direction, the length direction of the laser incident window is consistent with the axial direction of the pressure gas tank body, and an infrared laser is correspondingly configured at each laser incident window.

[0017] In order to quickly increase the temperature inside the pressure gas tank, multiple infrared lasers can be set, and multiple laser incident windows can be opened on the pressure gas tank body accordingly. Multiple infrared lasers simultaneously irradiate different positions on the impeller through the corresponding laser incident windows, and the impeller quickly generates high temperature under the irradiation of the laser.

[0018] In specific applications, the number of infrared lasers to be set and the number of laser incident windows opened on the pressure gas tank body can be selected according to actual conditions.

[0019] Furthermore, the infrared laser transmits the laser light to a laser head that moves back and forth at a uniform speed through an optical fiber. The movement direction of the laser head is consistent with the length direction of the laser incident window. During the uniform reciprocating motion of the laser head, the laser light it generates acts on the surface of the annular tungsten-rhenium alloy plate.

[0020] Further preferably, the annular tungsten-rhenium alloy plate and the copper plate rotate at a uniform speed about the central axis of the pressure gas tank body, and the laser generated by the laser head acts evenly on the surface of the annular tungsten-rhenium alloy plate, so that the annular tungsten-rhenium alloy plate is evenly heated.

[0021] In order to make the temperature inside the pressure gas tank more uniform and avoid damage caused by long-term laser irradiation on the same position on the impeller, when the laser of the infrared nanosecond continuous laser is irradiated on the annular tungsten-rhenium alloy plate, the annular tungsten-rhenium alloy plate and the copper plate are driven to rotate at a uniform speed around the central axis of the pressure gas tank body through the cooperation of the rotating shaft and the rotating drive component or other methods. At the same time, the linear drive module is used to drive the laser head to move back and forth in the length direction of the laser incident window, so that the laser is evenly irradiated on different positions of the annular tungsten-rhenium alloy plate, and the annular tungsten-rhenium alloy plate is heated more evenly.

[0022] Furthermore, two laser incident windows which are arranged opposite to each other are provided on the pressure gas tank body along the circumferential direction.

[0023] In specific applications, the number of infrared lasers and the number of laser incident windows opened on the pressure gas tank body can be selected according to actual conditions. Considering factors such as equipment cost and the speed of heating the inside of the pressure gas tank body, it is preferred to open two laser incident windows facing each other on the pressure gas tank body.

[0024] Furthermore, a temperature sensor is installed on the inner wall of the airflow outlet end, and a wind speed sensor is installed on the inner wall of the pressure gas tank.

[0025] In specific applications, the temperature and wind speed of the heated airflow are detected in real time through temperature sensors and wind speed sensors, and closed-loop control is implemented. According to the real-time detection of the temperature and wind speed of the heated airflow, the power of the infrared laser, the linear movement speed of the laser head, the rotation speed of the annular tungsten-rhenium alloy plate and the copper plate, the inlet flow rate of the airflow, etc. are adjusted accordingly, so as to achieve the purpose of accurately controlling the temperature and wind speed of the heated airflow to the preset values.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a method for generating high-speed and high-temperature airflow by laser surface irradiation. The method is pollution-free, small in space, relatively low in energy consumption, and does not require long-term preliminary preparation work. The method can quickly generate high-temperature and high-speed airflow, which solves the shortcomings of the traditional high-speed and high-temperature airflow preparation method. Moreover, the method in the present invention is simple to operate and can be operated through simple training, and is suitable for large-scale industrial production applications. The specific principle is as follows: In the present invention, an infrared nanosecond continuous laser is used as an energy input source, which continuously irradiates the impeller inside the pressure tank through the laser incident window on the pressure tank, so that the impeller generates high temperature. At the same time, when the external airflow (which can be a heated low-temperature airflow or an unheated room temperature airflow) enters the pressure tank through the conical airflow inlet end, as the pipe diameter gradually increases, the airflow velocity decreases, and the airflow with reduced velocity fully exchanges heat with the impeller, and the airflow is heated and pressurized. When the heated and pressurized airflow flows out through the conical airflow outlet end, as the pipe diameter decreases, the flow velocity increases, the kinetic energy of the fluid increases, and a high-speed and high-temperature airflow is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is an operation flow chart of using laser irradiation heat conduction to generate high-speed high-temperature airflow in the present invention;

[0030] Figure 2 The left side structural schematic diagram of the device for generating high-speed and high-temperature airflow by laser irradiation and heat conduction in the present invention;

[0031] Figure 3 It is a schematic diagram of the right side structure of the device for generating high-speed and high-temperature airflow by laser irradiation and heat conduction in the present invention;

[0032] Figure 4 It is a schematic diagram of the local structure of the pressure gas tank in the present invention;

[0033] Figure 5 It is a schematic diagram of the local structure of the impeller in the present invention;

[0034] Figure 6 It is a cross-sectional structural diagram of the impeller in the present invention.

[0035] Among them, the specific drawings are marked as:

[0036] Base 1, laser 2, laser head 3, gantry 4, fixing plate 5, linear drive module 6, adapter plate 7, fixing seat 8, pressure gas tank 9, pressure gas tank body 10, laser incident window 11, protective mirror frame 12, protective mirror 13, mounting flange 14, air flow inlet end 15, air flow outlet end 16, impeller 17, annular tungsten-rhenium alloy plate 18, copper plate 19, reinforcing plate 20, rotating shaft 21, rotating drive assembly 22. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] This embodiment discloses a method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction, such as Figure 1 As shown, the following steps are included:

[0040] An infrared laser is used as an energy source, which is irradiated through a laser incident window on the pressure gas tank body to an impeller coaxially mounted inside the pressure gas tank body, and the impeller is heated by the laser irradiation and generates heat;

[0041] Specifically, an infrared nanosecond continuous laser can be used, which can produce a higher thermal effect. The power of the infrared laser can be selected according to actual needs. In the specific embodiment, a 3000W infrared nanosecond continuous laser is selected;

[0042] The two ends of the pressure gas tank body along the axial direction are respectively formed with a conical airflow inlet end and an airflow outlet end with a gradually decreasing diameter. The external airflow enters the pressure gas tank body from the conical airflow inlet end, and the airflow velocity is reduced. When the airflow passes through the impeller heated by laser irradiation, it is heated, increased in temperature and pressurized, and finally passes through the conical airflow outlet end, so that the high-temperature airflow is accelerated to obtain a high-speed and high-temperature airflow.

[0043] According to the Bernoulli equation and the continuity equation, when the pipe diameter increases, the fluid flow rate decreases, and when the pipe diameter decreases, the fluid velocity increases.

[0044] The Bernoulli equation is as follows: ;

[0045] Among them, P1 and P2 are the pressures of the fluid at two different points, is the density of the fluid, v1 and v2 are the flow velocities at two different points, g is the acceleration due to gravity, and h1 and h2 are the heights at two different points.

[0046] The continuity equation is as follows: A1v1=A2v2;

[0047] Among them, A1 is the cross-sectional area of ​​the original pipe diameter, v1 is the original flow rate, A2 is the cross-sectional area of ​​the new pipe diameter, and v2 is the new flow rate.

[0048] In the present invention, an infrared nanosecond continuous laser is used as an energy input source, which is continuously irradiated to the impeller inside the pressure tank through the laser incident window on the pressure tank, so that the impeller generates high temperature. At the same time, when the external airflow (which can be a heated low-temperature airflow or an unheated room temperature airflow) enters the pressure tank through the tapered airflow inlet end, as the pipe diameter gradually increases, the airflow velocity decreases, and the airflow with reduced velocity fully exchanges heat with the impeller, the airflow is heated and pressurized, and when the heated and pressurized airflow flows out through the tapered airflow outlet end, as the pipe diameter decreases, the flow velocity increases, the kinetic energy of the fluid increases, and a high-speed and high-temperature airflow is obtained.

[0049] The impeller includes an annular tungsten-rhenium alloy plate and a copper plate. The annular tungsten-rhenium alloy plate is coaxially installed inside the pressure gas tank body. Multiple copper sheets are installed side by side in the axial direction inside the annular tungsten-rhenium alloy plate. Multiple through holes for air flow are formed on the surface of the copper sheet. The laser generated by the infrared laser passes through the laser incident window on the pressure gas tank body and irradiates the annular tungsten-rhenium alloy plate. The annular tungsten-rhenium alloy plate generates heat, and the heat is transferred to the inside of the pressure gas tank body through the multiple copper sheets installed side by side in the axial direction inside the annular tungsten-rhenium alloy plate. In order to quickly and evenly conduct the heat energy generated by the laser irradiation to the impeller to the inside or around the pressure gas tank body, so as to ensure the rapid and uniform heating of the incoming airflow, the structure of the impeller is optimized and designed, and a structure of annular tungsten-rhenium alloy plate and copper plate is adopted. The annular tungsten-rhenium alloy plate is an annular plate structure made of tungsten-rhenium alloy. Tungsten-rhenium alloy has high melting point, high thermal conductivity, high strength and plasticity, fewer cracks and holes, good radiation resistance and fracture resistance. The annular tungsten-rhenium alloy plate is coaxially installed in the pressure gas tank body. As the receptor of laser irradiation, it has a long service life and good thermal conductivity. It generates high temperature instantly under the irradiation of laser, and quickly conducts and disperses the heat to the inside of the pressure gas tank through the copper plate inside the annular tungsten-rhenium alloy plate, so that the airflow passing through the pressure gas tank is continuously and evenly heated. At the same time, the pressure in the tank will increase with the temperature inside the tank. On the other hand, the copper plate quickly conducts the heat generated instantly on the annular tungsten-rhenium alloy plate, reduces the influence of local overheating and thermal stress, and protects the annular tungsten-rhenium alloy plate.

[0050] Among them, at least one laser incident window is opened on the pressure gas tank body along the circumferential direction, the length direction of the laser incident window is consistent with the axial direction of the pressure gas tank body, and an infrared laser is correspondingly configured at each laser incident window. In order to quickly increase the temperature inside the pressure gas tank body, multiple infrared lasers can be set, and multiple laser incident windows can be correspondingly opened on the pressure gas tank body. Multiple infrared lasers are irradiated at different positions on the impeller through the corresponding laser incident windows at the same time, and the impeller quickly generates high temperature under the irradiation of the laser. In specific applications, the number of infrared lasers set and the number of laser incident windows opened on the pressure gas tank body can be specifically selected according to actual conditions.

[0051] Specifically, the length of the laser incident window matches the length of the annular tungsten-rhenium alloy plate inside the pressure gas tank, so that the incident laser is irradiated onto the annular tungsten-rhenium alloy plate as much as possible, and the outer diameter of the annular tungsten-rhenium alloy plate inside the pressure gas tank is as close as possible to the diameter of the inner wall of the pressure gas tank.

[0052] The infrared laser transmits the laser to the laser head that moves back and forth at a uniform speed through an optical fiber. The movement direction of the laser head is consistent with the length direction of the laser incident window. During the uniform reciprocating movement of the laser head, the laser generated by it acts on the surface of the annular tungsten-rhenium alloy plate. Further preferably, the annular tungsten-rhenium alloy plate and the copper plate rotate at a uniform speed with the central axis of the pressure gas tank body as the axis, and the laser generated by the laser head acts uniformly on the surface of the annular tungsten-rhenium alloy plate, and the annular tungsten-rhenium alloy plate is evenly heated.

[0053] In order to make the temperature inside the pressure gas tank more uniform and avoid damage caused by long-term laser irradiation on the same position on the impeller, when the laser of the infrared nanosecond continuous laser is irradiated on the annular tungsten-rhenium alloy plate, the annular tungsten-rhenium alloy plate and the copper plate are driven to rotate at a uniform speed around the central axis of the pressure gas tank body through the cooperation of the rotating shaft and the rotating drive component or other methods. At the same time, the linear drive module is used to drive the laser head to move back and forth in the length direction of the laser incident window, so that the laser is evenly irradiated on different positions of the annular tungsten-rhenium alloy plate, and the annular tungsten-rhenium alloy plate is heated more evenly.

[0054] Wherein, two laser incident windows which are arranged opposite to each other are arranged on the tank body of the pressure gas tank along the circumferential direction.

[0055] In specific applications, the number of infrared lasers and the number of laser incident windows opened on the pressure gas tank body can be selected according to actual conditions. Considering factors such as equipment cost and the speed of heating the inside of the pressure gas tank body, it is preferred to open two laser incident windows facing each other on the pressure gas tank body.

[0056] Among them, a temperature sensor is installed on the inner wall of the airflow outlet, and a wind speed sensor is installed on the inner wall of the pressure gas tank. In specific applications, the temperature and wind speed of the heated airflow are detected in real time through the temperature sensor and wind speed sensor, and closed-loop control is realized. According to the real-time detection of the temperature and wind speed of the heated airflow, the power of the infrared laser, the linear moving speed of the laser head, the rotation speed of the annular tungsten-rhenium alloy plate and the copper plate, the inlet flow rate of the airflow, etc. are correspondingly adjusted to achieve the purpose of accurately controlling the temperature and wind speed of the heated airflow to the preset value.

[0057] Example 2

[0058] This embodiment discloses a device suitable for the above method of using laser irradiation heat conduction to generate high-speed high-temperature airflow, such as Figures 2 to 6 As shown, the base 1 includes at least one laser 2 and a pressure gas tank 9 installed on the base 1. When multiple lasers 2 are installed on the base 1, the multiple lasers 2 are stacked and fixed on the base 1 to save installation space. The pressure gas tank 9 is installed on the base 1 through a fixing seat 8. The laser 2 uses a 3000W infrared nanosecond continuous laser.

[0059] The pressure gas tank 9 comprises a pressure gas tank body 10, an airflow inlet end 15 and an airflow outlet end 16. The pressure gas tank body 10 is provided with a conical airflow inlet end 15 and an airflow outlet end 16 with gradually decreasing diameters at both ends in the axial direction. An impeller 17 is coaxially mounted inside the pressure gas tank body 10.

[0060] At least one laser incident window 11 is opened on the pressure gas tank body 10 along the circumferential direction, and a protective mirror frame 12 is installed at the laser incident window 11, and a protective mirror 13 is installed in the protective mirror frame 12. The laser 2 transmits laser light to the corresponding laser head 3 through optical fiber, and a laser head 3 is correspondingly configured and installed at each laser incident window 11. The laser emitted by the laser head 3 passes through the laser incident window 11 and irradiates onto the impeller 17.

[0061] The specific working principle is as follows: the laser 2 is used as an energy input source, and it continuously irradiates the impeller 17 inside the pressure tank body through the laser incident window 11 on the pressure tank 9, so that the impeller 17 generates high temperature. At the same time, when the external airflow (which can be a heated low-temperature airflow or an unheated room temperature airflow) enters the pressure tank 9 through the tapered airflow inlet end 15, as the pipe diameter gradually increases, the airflow velocity decreases, and the airflow with reduced velocity fully exchanges heat with the impeller 17, the airflow is heated and pressurized, and when the heated and pressurized airflow flows out through the tapered airflow outlet end 16, as the pipe diameter decreases, the flow velocity increases, the kinetic energy of the fluid increases, and a high-speed and high-temperature airflow is obtained.

[0062] Among them, Figure 5 and Figure 6 As shown, the impeller 17 includes an annular tungsten-rhenium alloy plate 18 and a copper plate 19. The annular tungsten-rhenium alloy plate 18 is coaxially installed inside the pressure gas tank body 10. A plurality of copper plates 19 are installed side by side in the axial direction inside the annular tungsten-rhenium alloy plate 18. A plurality of through holes for air flow are formed on the surface of the copper plate 19. The laser generated by the laser 2 passes through the laser incident window 11 on the pressure gas tank body 10 and irradiates onto the annular tungsten-rhenium alloy plate 18. The annular tungsten-rhenium alloy plate 18 generates heat, and the heat is conducted to the inside of the pressure gas tank body 10 through the copper sheet inside the annular tungsten-rhenium alloy plate 18.

[0063] In order to quickly and evenly conduct the heat energy generated by the laser irradiation to the impeller 17 to the inside or the surrounding of the pressure gas tank body 10, so as to ensure the rapid and even heating of the incoming airflow, the structure of the impeller 17 is optimized and designed, and a structure in which an annular tungsten-rhenium alloy plate 18 and a copper plate 19 are matched is adopted. The annular tungsten-rhenium alloy plate 18 is an annular plate structure made of tungsten-rhenium alloy. The tungsten-rhenium alloy has a high melting point, high thermal conductivity, high strength and plasticity, fewer cracks and holes, good radiation resistance and fracture resistance. The annular tungsten-rhenium alloy plate 18 is coaxially installed to the pressure gas tank body 10. Internally, it serves as a receptor of laser irradiation, has a long service life, and has good thermal conductivity. It generates high temperature instantly under laser irradiation, and quickly conducts and disperses the heat to the inside of the pressure gas tank body 10 through the copper plate 19 welded inside the annular tungsten-rhenium alloy plate 18, so that the airflow passing through the pressure gas tank 9 is continuously and evenly heated. At the same time, the pressure in the tank body will also increase with the increase of the temperature in the tank body. On the other hand, the copper plate 19 quickly conducts the heat instantly generated on the annular tungsten-rhenium alloy plate 18, reduces the influence of local overheating and thermal stress, and protects the annular tungsten-rhenium alloy plate 18.

[0064] Among them, Figure 2 and Figure 3 As shown, the length direction of the laser incident window 11 is consistent with the axial direction of the pressure gas tank body 10, two side-by-side gantries 4 are installed on the base 1, and the two gantries 4 span the pressure gas tank body 10. The fixing plate 5 is spanned above the two gantries 4 by bolts, and the linear drive module 6 is fixedly installed on the fixing plate 5. The output end of the linear drive module 6 is connected to the adapter plate 7, and the laser head 3 is installed on the adapter plate 7. The laser head 3 is located at the corresponding laser incident window 11. The number of linear drive modules 6 corresponds to the number and installation position of the laser heads 3. The linear drive modules 6 are respectively connected to the corresponding laser heads 3 for driving, and the linear drive modules 6 drive the laser heads 3 to move back and forth along the length direction of the laser incident window 11. The linear drive module 6 can select a structural component with a linear sliding drive function in the prior art, including but not limited to a screw motor drive component.

[0065] Among them, Figures 4 to 6 As shown, a center hole is opened at the center of the multiple copper plates 19, and a rotating shaft 21 is passed through and fixed in the center hole. One end of the rotating shaft 21 passes through the pressure gas tank 9 and is driven and connected to a rotating drive component 22 located outside the pressure gas tank 9.

[0066] In order to make the temperature inside the pressure gas tank body 10 more uniform and avoid damage caused by long-term laser irradiation on the same position on the impeller 17, the following specific structural design is carried out: first, the rotating shaft 21, the copper plate 19 and the annular tungsten-rhenium alloy plate 18 are driven by the rotary drive component 22 to rotate at a uniform speed about the central axis of the pressure gas tank body 10, and at the same time, the linear drive module 6 drives the laser head 3 to move back and forth in the length direction of the laser incident window 11, so that the laser is evenly irradiated at different positions on the annular tungsten-rhenium alloy plate 18, and the annular tungsten-rhenium alloy plate 18 is heated more evenly.

[0067] Among them, there are two air flow inlet ends 15, and one end of the pressure gas tank body 10 that is installed in cooperation with the air flow inlet end 15 is provided with a mounting flange 14, and two symmetrically arranged openings are formed on the mounting flange 14. The two air flow inlet ends 15 are respectively installed at the two openings, and an installation gap is formed between the two air flow inlet ends 15, and the rotating drive assembly 22 is installed in the installation gap.

[0068] By improving the structure of the airflow inlet end 15, two symmetrically arranged conical airflow inlet ends 15 are formed at one end of the pressure gas tank body 10. On the one hand, the uniformity of the airflow entering is ensured, and on the other hand, an installation gap is formed between the two airflow inlet ends 15 for the installation of the rotary drive component 22. The rotary drive component 22 adopts a structure in which a horizontal reduction motor, a coupling and a power transmission component (bevel gear) cooperate. When the horizontal reduction motor rotates, the kinetic energy is transmitted to the impeller 17.

[0069] Among them, a plurality of radially radiating and outwardly protruding reinforcing plates 20 are evenly distributed on one side of the copper plate 19, and the reinforcing plates 20 are welded to the outer side of the rotating shaft 21 and the inner side of the annular tungsten-rhenium alloy plate 18 at both ends along the length direction.

[0070] By providing the reinforcing plate 20, on the one hand, the structure of the copper plate 19 can be strengthened to better cope with the fluid of the atmospheric flow. On the other hand, since the copper plate 19 is relatively thin, the welding contact area between the copper plate 19 and the rotating shaft 21 and the inner side of the annular tungsten-rhenium alloy plate 18 is limited. The end of the reinforcing plate 20 can be used as a welding site to increase the welding area between the copper plate 19 and the rotating shaft 21 and the inner side of the annular tungsten-rhenium alloy plate 18, and the structure of the copper plate 19 is more stable.

[0071] Among them, two laser incident windows 11 are arranged opposite to each other along the circumferential direction on the pressure gas tank body 10. In specific applications, the number of lasers 2 and the number of laser incident windows 11 arranged on the pressure gas tank body 10 can be selected according to actual conditions. Considering factors such as equipment cost and the speed of heating the inside of the pressure gas tank body 10, it is preferred to open two laser incident windows 11 arranged opposite to each other on the pressure gas tank body 10.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction, characterized in that: The following steps are involved: An infrared laser is used as an energy source, which is irradiated onto an impeller inside the pressure gas tank through a laser incident window on the pressure gas tank body, and the impeller is heated by the laser irradiation and generates heat; The two ends of the pressure gas tank body along the axial direction are respectively formed with a conical airflow inlet end and an airflow outlet end with a gradually decreasing diameter. The external airflow enters the pressure gas tank body from the conical airflow inlet end, and the airflow velocity is reduced. When the airflow passes through the impeller heated by laser irradiation, it is heated, increased in temperature and pressurized, and finally passes through the conical airflow outlet end, so that the high-temperature airflow is accelerated to obtain a high-speed and high-temperature airflow.

2. The method of generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 1, characterized in that: The impeller includes an annular tungsten-rhenium alloy plate and a copper plate. The annular tungsten-rhenium alloy plate is coaxially installed inside the pressure gas tank body. Multiple copper sheets are installed side by side in the axial direction inside the annular tungsten-rhenium alloy plate. Multiple through holes for air flow are formed on the surface of the copper sheet. The laser generated by the infrared laser passes through the laser incident window on the pressure gas tank body and irradiates the annular tungsten-rhenium alloy plate. The annular tungsten-rhenium alloy plate generates heat, and the heat is conducted to the inside of the pressure gas tank body through the multiple copper sheets installed inside the annular tungsten-rhenium alloy plate.

3. The method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 2, characterized in that: At least one laser incident window is provided on the pressure gas tank body along the circumferential direction, the length direction of the laser incident window is consistent with the axial direction of the pressure gas tank body, and an infrared laser is correspondingly arranged at each laser incident window.

4. The method of generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 3, characterized in that: The infrared laser transmits the laser to the laser head which moves back and forth at a uniform speed through the optical fiber. The movement direction of the laser head is consistent with the length direction of the laser incident window. During the uniform reciprocating motion of the laser head, the laser generated by it acts on the surface of the annular tungsten-rhenium alloy plate.

5. The method for generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 4, characterized in that: The annular tungsten-rhenium alloy plate and the copper plate rotate at a constant speed with the central axis of the pressure gas tank as the axis, and the laser generated by the laser head acts evenly on the surface of the annular tungsten-rhenium alloy plate, so that the annular tungsten-rhenium alloy plate is evenly heated.

6. The method of generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 5, characterized in that: Two laser incident windows which are arranged opposite to each other are arranged on the body of the pressure gas tank along the circumferential direction.

7. The method of generating high-speed and high-temperature airflow by utilizing laser irradiation heat conduction according to claim 1, characterized in that: A temperature sensor is installed on the inner wall of the air flow outlet end, and a wind speed sensor is installed on the inner wall of the pressure gas tank.

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