Method for generating wall surface temperature difference power generation scheme in aerodynamic thermal environment of low-vacuum pipeline train

Abstract

The invention belongs to the technical field of heat management in a vacuum pipeline traffic system. The invention provides a method for generating a wall surface temperature difference power generation scheme in a low-vacuum pipeline train aerodynamic thermal environment. A geometric model of a low-vacuum pipeline high-speed train is constructed; determining operation parameters of the low-vacuum pipeline train; according to the relation between the Mach number and the blocking ratio, whether the train is choked or not is judged; if the congestion does not occur, ending; if choking occurs, the aerodynamic thermal environment of the low-vacuum-pipeline high-speed train is calculated according to the geometric model and the operation parameters, and temperature distribution data of the surface of the train are obtained; the hot ends of the semiconductor thermoelectric power generation devices are arranged at the maximum surface temperature position of the train, the cold ends of the semiconductor thermoelectric power generation devices are arranged at the minimum surface temperature position of the train, and an auxiliary power supply of an in-train air conditioner and lighting system is formed to serve as a thermoelectric power generation scheme. According to the invention, the heat energy of the low-vacuum pipeline train in the aerodynamic heat environment is recycled to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management in a vacuum pipeline transportation system, and particularly relates to a method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, a system for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, a computer device, a computer-readable storage medium, and a low-vacuum pipeline train. Background Art

[0002] The statements in this part only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] As a new type of transportation mode that breaks through the limitations of traditional rail transit, the low-vacuum pipeline high-speed train has emerged. With its ultra-high speed, low energy consumption, and environmental protection characteristics, it is hailed as a revolutionary breakthrough in future transportation. The design principle of the low-vacuum pipeline high-speed train lies in constructing an almost vacuum pipeline environment to greatly reduce air resistance, enabling the train to shuttle through it at a speed far exceeding the existing technology. However, while this innovation brings a leap in speed, it is also accompanied by a series of unprecedented technical challenges, and the most prominent problem is the pneumatic thermal effect generated during the train operation.

[0004] When the train travels through the low-vacuum pipeline at an extremely high speed, the vehicle body undergoes intense compression and extrusion with the residual air molecules in the pipe. This process is similar to the pneumatic heating phenomenon encountered by an airplane flying at high speed through the atmosphere. However, in the low-vacuum pipeline environment, due to the pipe restricting the free flow of air, this compression effect is more concentrated and intense. As the kinetic energy of the train is efficiently converted into heat energy, a large amount of pneumatic heat accumulates rapidly in the pipe. This energy conversion not only causes a sharp rise in the surface temperature of the train but also forms a dynamically changing high-temperature environment inside the pipeline. For the train materials, being exposed to such high-temperature conditions for a long time is undoubtedly a severe test of their heat resistance and structural stability. At the same time, the high temperature may also trigger a series of physical and chemical reactions, such as material thermal expansion, surface oxidation, etc., which are directly related to the train's driving safety. Summary of the Invention

[0005] To solve the deficiencies of the prior art, the present invention provides a method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, which can, to a certain extent, realize the recovery and utilization of the thermal energy in the pneumatic thermal environment of the low-vacuum pipeline train for the auxiliary power supply of in-vehicle air conditioners and lighting equipment.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train.

[0008] A method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, comprising the following processes:

[0009] Obtain the geometric parameters of the low-vacuum pipeline high-speed train and construct a geometric model;

[0010] Determine the operating parameters of the low-vacuum pipeline train;

[0011] According to the relationship between the Mach number and the blockage ratio, determine whether the train is choked;

[0012] If there is no choking, end; if there is choking, calculate the pneumatic thermal environment of the low-vacuum pipeline high-speed train according to the geometric model and the operating parameters to obtain the temperature distribution data on the train surface;

[0013] Arrange the hot end of the semiconductor thermoelectric power generation device at the position with the maximum surface temperature of the train, and arrange the cold ends of the semiconductor thermoelectric power generation devices at the positions with the minimum surface temperature of the train respectively to form an auxiliary power supply for the in-vehicle air conditioner and lighting system as the thermoelectric power generation scheme.

[0014] As a further limitation of the first aspect of the present invention, the geometric parameters include: the length L of the train head H , the length L of the middle part M , the length L of the tail T , the body radius R Tr , and the blockage ratio BR = R Tr 2 / R Tu 2 , where R Tu is the pipe radius.

[0015] As a further limitation of the first aspect of the present invention, the operating parameters include: the pipe internal environment parameters and the train operating parameters. The pipe internal environment parameters include: the pipe internal pressure p, the static temperature T and the corresponding ambient sound speed a; the train operating parameters include: the train speed U0 and the Mach number M0 = U0 / a at the corresponding static temperature T.

[0016] As a further limitation of the first aspect of the present invention, the hot end of the semiconductor thermoelectric power generation device is arranged at the head position of the train, denoted as T H ; the cold end of the semiconductor thermoelectric power generation device is arranged at the tail of the train, denoted as T C ; a temperature difference T H -T C is formed between the two ends. The greater the temperature difference, the higher the power generation efficiency;

[0017] As a further limitation of the first aspect of the present invention, the thermoelectric performance of the semiconductor thermoelectric power generation is described by the dimensionless figure of merit ZT, including:

[0018]

[0019] Wherein, α is the Seebeck coefficient of the thermoelectric material; σ is the electrical conductivity; κ is the thermal conductivity; and T is the temperature.

[0020] As a further limitation of the first aspect of the present invention, the maximum power generation efficiency of the wall temperature difference power generation device is:

[0021]

[0022] Wherein, η max is the maximum power generation efficiency; ZT m is the average figure of merit of the thermoelectric material between T H and T C

[0023] In a second aspect, the present invention provides a system for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train.

[0024] A system for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, comprising:

[0025] A geometric model construction unit, configured to: obtain the geometric parameters of a low-vacuum pipeline high-speed train and construct a geometric model;

[0026] An operating parameter acquisition unit, configured to: determine the operating parameters of the low-vacuum pipeline train;

[0027] A choking state judgment unit, configured to: judge whether the train is choked according to the relationship between the Mach number and the blockage ratio;

[0028] A temperature distribution calculation unit, configured to: if no choking occurs, end; if choking occurs, calculate the pneumatic thermal environment of the low-vacuum pipeline high-speed train according to the geometric model and the operating parameters, and obtain the temperature distribution data on the train surface;

[0029] A power generation scheme generation unit, configured to: arrange the hot end of the semiconductor thermoelectric power generation device at the position with the maximum surface temperature of the train, and arrange the cold ends of the semiconductor thermoelectric power generation device at the positions with the minimum surface temperature of the train respectively, to form an auxiliary power supply for the in-vehicle air conditioner and lighting system, as the thermoelectric power generation scheme.

[0030] In a third aspect, the present invention provides a computer device, comprising: a processor and a computer-readable storage medium;

[0031] The processor is adapted to execute a computer program;

[0032] ​A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train as described in the first aspect of the present invention.

[0033] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, which is adapted to be loaded and executed by a processor to implement the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train as described in the first aspect of the present invention.

[0034] In a fifth aspect, the present invention provides a computer program product including a computer program, which, when executed by a processor, implements the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train as described in the first aspect of the present invention.

[0035] In a sixth aspect, the present invention provides a low-vacuum pipeline train with an auxiliary power source arranged inside the train, and the auxiliary power source is determined according to the scheme generated by the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train as described in the first aspect of the present invention.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] The present invention innovatively proposes a strategy for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, which can, to a certain extent, realize the recovery and utilization of the thermal energy in the pneumatic thermal environment of the low-vacuum pipeline train for use as the auxiliary power source for in-vehicle air conditioners and lighting equipment.

[0038] Advantages of additional aspects of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0040] Figure 1 It is a schematic flowchart of the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train provided in Embodiment 1 of the present invention;

[0041] Figure 2 It is a schematic diagram of the operating parameters of the low-vacuum pipeline train provided in Embodiment 1 of the present invention;

[0042] Figure 3A schematic diagram of the system for generating the wall temperature difference power generation scheme under the pneumatic thermal environment of the low-vacuum pipeline train provided in Embodiment 2 of the present invention;

[0043] Figure 4 A schematic diagram of the computer device provided in Embodiment 3 of the present invention. Detailed implementation manners

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further descriptions of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0046] In the case of no conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0047] Embodiment 1:

[0048] The thermoelectric conversion technology belongs to one of the thermoelectric conversion technologies. The thermoelectric conversion technology shows broad application prospects in the aerospace field, mainly including two categories: direct conversion and thermal cycle. The direct conversion includes semiconductor thermoelectric power generation technology, alkali metal thermoelectric conversion technology, magnetohydrodynamic power generation technology, etc. to directly convert heat energy into electrical energy. The cyclic thermoelectric conversion technology first converts heat energy into mechanical energy through the Stirling cycle, Rankine cycle and Brayton cycle, and then drives a generator to generate electricity.

[0049] In the case of congestion, the air temperature in front of the train is high and the air temperature behind is low, resulting in a large temperature difference at both ends of the train. At the same time, when the train is running, the people and equipment inside the train will generate heat, and the air conditioning system needs to consume a large amount of electricity to maintain a comfortable environment inside the train.

[0050] This implementation manner proposes a method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train. First, the technical terms and related concepts involved in this processing scheme will be briefly introduced, where:

[0051] In the congested state, the flow field structure in the pipeline will change, and the temperature and pressure distributions from the front of the vehicle to the rear will generally show a trend of high in the front and low in the rear. At the same time, the shock waves at the shoulders and the rear of the vehicle will cause local flow field fluctuations, which may lead to deformation of the vehicle body surface and reduction of the aerodynamic performance of the vehicle body, thus threatening the driving safety. In addition, the congestion effect will also bring complex aerodynamic heating phenomena, resulting in local heating or cooling on the train surface, further affecting the operation performance and safety of the train.

[0052] Specifically, the method for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train proposed in this implementation method includes the following processes:

[0053] S1. Obtain the geometric parameters of the low-vacuum pipeline high-speed train and construct a geometric model;

[0054] S2. Determine the operating parameters of the low-vacuum pipeline high-speed train;

[0055] S3. Judge whether it is choked. If so, execute the following steps;

[0056] S4. Calculate the pneumatic thermal environment of the low-vacuum pipeline high-speed train to obtain the temperature distribution data on the train surface;

[0057] S5. Arrange the hot end and cold end of the semiconductor thermoelectric power generation device at the maximum and minimum positions of the train surface temperature respectively to form an auxiliary power supply for the in-vehicle air conditioner and lighting system, which is used as the wall temperature difference power generation scheme.

[0058] In step S1 of this implementation method, as Figure 2 shown, the geometric model is a two-dimensional axisymmetric model; the pipeline is a long straight circular structure with an inner wall radius of R Tu without considering the wall thickness, the train has a bullet shape, including the head, middle and tail, without considering the vehicle body thickness.

[0059] In step S1 of this implementation method, the geometric parameters include the head length L H of the train, the middle length L M , the tail length L T , the body radius R Tr , and the blockage ratio BR = R Tr 2 / R Tu 2 , L = L H +L M +L T , L H = L T , R Tr < R Tu .

[0060] In step S2 of this implementation method, the operating parameters include the in-pipe environment parameters and the train operating parameters. The operating parameters include: the in-pipe pressure p (p < 1 atm), the static temperature T and the corresponding ambient sound speed a; the train operating parameters include: the train speed U0 and the Mach number M0 = U0 / a at the corresponding static temperature T.

[0061] In step S3 of this implementation method, the relationship between the Mach number and the blockage ratio is derived based on the one-dimensional isentropic theory and the Kantrowitz limit to determine whether the train is congested. Specifically, as follows:

[0062]

[0063] Among them, γ is the specific heat ratio. According to the corresponding relationship between the above-mentioned blockage ratio BR and the Mach number M0, with the help of the one-dimensional isentropic theory and the Kantrowitz limit, the flow partition can be determined. According to the flow partition, the internal flow phenomena of the pipeline train under different working conditions can be determined, and then whether congestion occurs can be determined.

[0064] When the train is congested, the air in front of the train cannot smoothly pass through the annular space between the train and the pipeline to reach the rear of the train. There is a strong extrusion between the train and the air, forming a high-temperature area at the front of the train. At the rear of the train, a low-temperature wake area is generated due to expansion, resulting in a process of gradually decreasing temperature on the train surface from the front to the rear; when the train is not congested, if the train speed is less than the speed of sound a, the degree of aerodynamic heat in the pipe is very small; if the train speed exceeds the speed of sound a, although the aerodynamic heat phenomenon in the pipe is serious, due to the very high train speed, the flow field structure in the pipe is more complex, and the temperature distribution on the train surface is chaotic and irregular. The case of non-congested supersonic speed is not considered in this invention for the time being. When the train speed increases from subsonic to transonic and even supersonic, the occurrence of congestion is inevitable, especially under the condition of a large blockage ratio.

[0065] In step S4 of this implementation method, the calculation method is CFD (Computational Fluid Dynamics) numerical simulation. A fluid simulation software is used for steady-state calculation (for example, Fluent, OpenFOAM, StarCCM+ etc. can be used, and those skilled in the art can use authorized software for calculation); in the form of the train being stationary, the flow of the oncoming air and the moving pipe wall conditions are used to simulate the train running in the pipeline to reduce the calculation amount; the magnitude of the oncoming air speed is the same as that of the train speed, and the directions are opposite; the magnitude of the moving pipe wall speed is the same as that of the train speed, and the directions are opposite.

[0066] After the train runs stably, the temperature field around the train and the temperature distribution on the train surface are obtained. These are the data under the condition of radiation balance, which is closer to the actual running situation; the temperature field around the train shows the distribution characteristics of a high-temperature area in front and a low-temperature area in the rear, and the temperature on the train surface shows the distribution characteristics of being high at the front and low at the rear.

[0067] In step S5 of this implementation method, the hot end of the semiconductor thermoelectric power generation device is arranged at the front of the train, where the temperature is the highest, denoted as T H ; the cold end of the semiconductor thermoelectric power generation device is arranged at the rear of the train, where the temperature is the lowest, denoted as T C ; a temperature difference T is formed between the two endsH -T C The greater the temperature difference, the higher the power generation efficiency.

[0068] In this implementation, preferably, the thermoelectric performance of semiconductor thermoelectric power generation is described by the dimensionless figure of merit ZT, which is specifically as follows:

[0069]

[0070] In the formula, α is the Seebeck coefficient of the thermoelectric material, V / K; σ is the electrical conductivity, S / m; κ is the thermal conductivity, W / (m·K); T is the temperature, K.

[0071] In this implementation, preferably, the maximum power generation efficiency of the designed wall temperature difference power generation device can be expressed as:

[0072]

[0073] In the formula, η max is the maximum power generation efficiency, dimensionless; ZT m is the average value of the figure of merit of the thermoelectric material between T H and T C , dimensionless.

[0074] In this implementation, after the scheme is formed, the hot end of the semiconductor thermoelectric power generation device is arranged at the front of the vehicle head according to the final scheme, the cold end of the semiconductor thermoelectric power generation device is arranged at the rear of the vehicle tail, and the temperature difference power generation device forms a circuit closed loop on the inner surface of the vehicle body and is connected to the in-vehicle power consumption system as an auxiliary power source for the in-vehicle air conditioning and lighting systems.

[0075] Example 2:

[0076] As Figure 3 shown, this implementation provides a system for generating a wall temperature difference power generation scheme under the pneumatic thermal environment of a low-vacuum pipeline train, including:

[0077] A geometric model construction unit, configured to: obtain the geometric parameters of the low-vacuum pipeline high-speed train and construct a geometric model;

[0078] An operating parameter acquisition unit, configured to: determine the operating parameters of the low-vacuum pipeline train;

[0079] A choking state judgment unit, configured to: judge whether the train is choked according to the relationship between the Mach number and the blockage ratio;

[0080] A temperature distribution calculation unit, configured to: if no choking occurs, end; if choking occurs, calculate the pneumatic thermal environment of the low-vacuum pipeline high-speed train according to the geometric model and the operating parameters to obtain the temperature distribution data on the train surface;

[0081] A power generation scheme generation unit is configured to: arrange the hot end of a semiconductor thermoelectric power generation device at the position with the maximum surface temperature of the train, and arrange the cold ends of the semiconductor thermoelectric power generation devices at the positions with the minimum surface temperature of the train respectively, to form an auxiliary power supply for the in-vehicle air conditioning and lighting systems, as a thermoelectric power generation scheme.

[0082] The specific working processes of the above-mentioned respective units are as described in Embodiment 1 and will not be elaborated here.

[0083] It can be understood that the above-mentioned respective units can be separately or wholly combined into one or several other units to form, or a certain one (or some) of the units can be further split into multiple smaller units in terms of function to form, which can achieve the same operations without affecting the realization of the technical effects of the embodiments of this application. The above units are divided based on logical functions. In practical applications, the function of one unit can also be realized by multiple units, or the functions of multiple units can be realized by one unit. In other embodiments of this application, the system can also include other units. In practical applications, these functions can also be assisted by other units and can be realized through the cooperation of multiple units.

[0084] According to another embodiment of this application, the system described in this embodiment can be constructed, and the method of Embodiment 1 of this application can be realized by running a computer program (including program code) capable of executing the respective steps involved in the corresponding method described in Embodiment 1 on a general computing device such as a computer including processing elements and storage elements such as a central processing unit (CPU), a random access memory (RAM), and a read-only memory (ROM). The computer program can be recorded on, for example, a computer-readable recording medium, and be loaded into the above-mentioned computing device through the computer-readable recording medium and run therein.

[0085] Embodiment 3:

[0086] As Figure 4 shown, this implementation provides an electronic device, which includes a processor 1001, a communication interface 1002, and a computer-readable storage medium 1003. Among them, the processor 1001, the communication interface 1002, and the computer-readable storage medium 1003 can be connected through a bus or other means.

[0087] Among them, the communication interface 1002 is used for receiving and sending data. The computer-readable storage medium 1003 can be stored in the memory of the electronic device. The computer-readable storage medium 1003 is used for storing computer programs. The computer programs include program instructions. The processor 1001 is used for executing the program instructions stored in the computer-readable storage medium 1003.

[0088] The processor 1001 (or CPU (Central Processing Unit, central processor)) is the computing core and control core of the electronic device, and is adapted to implement one or more instructions. Specifically, it is adapted to load and execute one or more instructions so as to implement the corresponding method flow or corresponding function.

[0089] The processor 1001 is configured to execute the following process:

[0090] Obtain the geometric parameters of the high-speed train in the low-vacuum pipeline and construct a geometric model;

[0091] Determine the operating parameters of the low-vacuum pipeline train;

[0092] According to the relationship between the Mach number and the blockage ratio, determine whether the train is congested;

[0093] If there is no congestion, end; if there is congestion, calculate the aerodynamic heat environment of the high-speed train in the low-vacuum pipeline according to the geometric model and the operating parameters, and obtain the temperature distribution data on the train surface;

[0094] Arrange the hot end of the semiconductor thermoelectric power generation device at the position with the maximum surface temperature of the train, and arrange the cold ends of the semiconductor thermoelectric power generation devices at the positions with the minimum surface temperature of the train respectively to form an auxiliary power supply for the in-vehicle air conditioning and lighting systems, as a thermoelectric power generation solution.

[0095] For the specific working process, see the introduction in Embodiment 1 and will not be elaborated here.

[0096] Embodiment 4:

[0097] This implementation provides a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in the electronic device and is used for storing programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the electronic device and, of course, the extended storage medium supported by the electronic device. The computer-readable storage medium provides a storage space, and this storage space stores the processing system of the electronic device.

[0098] Moreover, one or more instructions suitable for being loaded and executed by a processor are stored in this storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory; optionally, it can also be at least one computer-readable storage medium located far from the aforementioned processor.

[0099] In one embodiment, one or more instructions are stored in the computer-readable storage medium; one or more instructions stored in the computer-readable storage medium are loaded and executed by a processor to implement the following process:

[0100] Obtain the geometric parameters of the low-vacuum pipeline high-speed train and construct a geometric model;

[0101] Determine the operating parameters of the low-vacuum pipeline train;

[0102] According to the relationship between the Mach number and the blockage ratio, determine whether the train is congested;

[0103] If there is no congestion, end; if there is congestion, calculate the aerodynamic heat environment of the low-vacuum pipeline high-speed train according to the geometric model and the operating parameters to obtain the temperature distribution data on the train surface;

[0104] Arrange the hot end of the semiconductor thermoelectric power generation device at the position with the maximum surface temperature of the train, and arrange the cold ends of the semiconductor thermoelectric power generation device at the positions with the minimum surface temperature of the train respectively to form an auxiliary power supply for the in-car air conditioning and lighting system as a thermoelectric power generation solution.

[0105] For the specific working process, see the introduction in Embodiment 1 and will not be elaborated here.

[0106] Embodiment 5:

[0107] This implementation provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to enable the electronic device to perform the following process:

[0108] Obtain the geometric parameters of the low-vacuum pipeline high-speed train and construct a geometric model;

[0109] Determine the operating parameters of the low-vacuum pipeline train;

[0110] According to the relationship between the Mach number and the blockage ratio, determine whether the train is congested;

[0111] If there is no congestion, end; if congestion occurs, calculate the aerothermal environment of the high-speed train in the low-vacuum pipeline according to the geometric model and the operating parameters to obtain the temperature distribution data on the train surface.

[0112] Arrange the hot end of the semiconductor thermoelectric power generation device at the position with the maximum temperature on the train surface, and arrange the cold ends of the semiconductor thermoelectric power generation device at the positions with the minimum temperature on the train surface respectively to form an auxiliary power supply for the in-car air conditioner and lighting system as the thermoelectric power generation scheme.

[0113] For the specific working process, see the introduction in Embodiment 1 and will not be elaborated here.

[0114] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this application can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0115] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of this application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data processing device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0116] Embodiment 6:

[0117] This implementation provides a low-vacuum pipeline train, and an auxiliary power supply is arranged inside the train. The auxiliary power supply is determined according to the scheme generation method for the wall temperature difference power generation in the pneumatic thermal environment of the low-vacuum pipeline train described in Embodiment 1.

[0118] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for generating a wall temperature difference power generation scheme under aerodynamic thermal environment of a low vacuum pipeline train, characterized in that: The process includes: Obtain the geometric parameters of the low vacuum tube high-speed train and build a geometric model; Determine the operating parameters of the low vacuum tube train; According to the relationship between Mach number and blocking ratio, determine whether the train is congested; If no congestion occurs, the process ends; if congestion occurs, the aerodynamic thermal environment of the low vacuum pipeline high-speed train is calculated according to the geometric model and the operating parameters to obtain the temperature distribution data on the train surface; The hot end of the semiconductor thermoelectric power generation device is arranged at the position where the train surface temperature is maximum, and the cold end of the semiconductor thermoelectric power generation device is arranged at the position where the train surface temperature is minimum, forming an auxiliary power supply for the air conditioning and lighting system in the car as a thermoelectric power generation solution.

2. The method for generating a wall temperature difference power generation scheme in a low vacuum tube train aerodynamic thermal environment according to claim 1, characterized in that: The geometric parameters include: train head length L H , middle length L M , tail length L T 、Body radius R Tr , and the blocking ratio BR = R Tr 2 / R Tu 2 , R Tu is the pipe radius.

3. The method for generating a wall temperature difference power generation scheme in a low vacuum tube train aerodynamic thermal environment according to claim 1, characterized in that: The operating parameters include: pipe environment parameters and train operating parameters. The pipe environment parameters include: pipe pressure p, static temperature T and its corresponding ambient sound speed a; the train operating parameters include: train speed U0 and the Mach number M0=U0 / a at the corresponding static temperature T.

4. The method for generating a wall temperature difference power generation scheme in a low vacuum tube train aerodynamic thermal environment according to claim 1, characterized in that: The hot end of the semiconductor temperature difference power generation device is arranged at the front of the vehicle, denoted by T H The cold end of the semiconductor temperature difference power generation device is arranged at the rear of the vehicle, denoted by T C ; Temperature difference T is formed at both ends H -T C , the greater the temperature difference, the higher the power generation efficiency.

5. The method for generating a wall temperature difference power generation scheme in a low vacuum tube train aerodynamic thermal environment according to claim 4, characterized in that: The thermoelectric performance of semiconductor thermoelectric power generation is described by the dimensionless figure of merit ZT, including: Where α is the Seebeck coefficient of the thermoelectric material; σ is the electrical conductivity; κ is the thermal conductivity; and T is the temperature.

6. The method for generating a wall temperature difference power generation scheme in a low vacuum tube train aerodynamic thermal environment according to claim 4, characterized in that: The maximum power generation efficiency of the wall temperature difference power generation device is: Where η max is the maximum power generation efficiency; ZT m For thermoelectric materials at T H With T C The average value of merit between .

7. A system for generating a wall temperature difference power generation scheme in a low vacuum pipeline train aerodynamic thermal environment, characterized in that: include: The geometric model building unit is configured to: obtain geometric parameters of the low vacuum tube high-speed train and build a geometric model; The operating parameter acquisition unit is configured to: determine the operating parameters of the low vacuum pipeline train; The congestion state judgment unit is configured to: judge whether the train is congested according to the relationship between the Mach number and the congestion ratio; The temperature distribution calculation unit is configured to: if no congestion occurs, end; if congestion occurs, calculate the aerodynamic thermal environment of the low vacuum pipeline high-speed train according to the geometric model and the operating parameters to obtain the temperature distribution data of the train surface; The power generation scheme generating unit is configured as follows: the hot end of the semiconductor temperature difference power generation device is arranged at the position where the train surface temperature is maximum, and the cold end of the semiconductor temperature difference power generation device is arranged at the position where the train surface temperature is minimum, to form an auxiliary power supply for the air conditioning and lighting system in the vehicle as a temperature difference power generation scheme.

8. A computer device, characterized in that: include: a processor and a computer readable storage medium; a processor adapted to execute a computer program; A computer-readable storage medium having a computer program stored therein, wherein when the computer program is executed by the processor, the method for generating a wall temperature difference power generation scheme in an aerodynamic thermal environment of a low-vacuum tube train as described in any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which is suitable for being loaded by a processor and executing the method for generating a wall temperature difference power generation scheme in an aerodynamic thermal environment of a low-vacuum tube train as described in any one of claims 1 to 6.

10. A low vacuum tube train, characterized in that: An auxiliary power supply is arranged in the train, and the auxiliary power supply is determined by a scheme generated by a method for generating a wall temperature difference power generation scheme in an aerodynamic thermal environment of a low-vacuum tube train according to any one of claims 1 to 6.

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