Information processing device, program, and information processing method

Abstract

To provide an information processing device and the like capable of predicting a combustion state of flames.SOLUTION: An information processing device having a control section acquires a combustion condition of a gas burner, and a flame temperature relative to an air fuel ratio of fuel and an oxidant supplied to the gas burner. The information processing device calculates the flow velocity of the fuel immediately after combustion in the gas burner on the basis of flame temperature relative to a combustion condition and an air fuel ratio of the gas burner. The information processing device also calculates an emission direction of fuel immediately after the combustion on the basis of the combustion condition of the gas burner and the calculated flow velocity of fuel immediately after combustion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an information processing device, a program, and an information processing method. [Background technology]

[0002] The temperature change of a material being heated in a heat treatment furnace is predicted using a model based on the temperature around the material and a heat transfer coefficient that indicates the amount of heat transferred to the material per unit time. Patent Document 1 also discloses a thermal fluid analysis technology that predicts the amount of heat transferred by radiation between a fluid and a solid placed in the fluid using an equation that mathematically expresses the amount of heat transferred by radiation per unit volume as a function of the "position of the solid region," "temperature of the solid region," and "temperature of the furnace wall surface." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-80613 Summary of the Invention [Problem to be solved by the invention]

[0004] The rate of temperature rise at each position in a heat treatment furnace varies depending on the ambient environment of the solid (material) being analyzed and whether the heat treatment furnace is in a temperature rising state or a temperature maintaining state. However, the above-mentioned conventional techniques do not take this change in the rate of temperature rise into account. Also, some heat treatment furnaces use gas burners as a heat source, and the amount of heat transfer and temperature change at each position in the heat treatment furnace vary depending on the combustion state of the flame from the gas burner. However, none of the above-mentioned conventional techniques takes the combustion state of the flame into account when predicting the amount of heat transfer or temperature change at each position in the heat treatment furnace.

[0005] An object of the present disclosure is to provide an information processing device and the like that is capable of predicting the combustion state of a flame. [Means for solving the problem]

[0006] An information processing device according to one aspect of the present disclosure is an information processing device having a control unit, wherein the control unit acquires combustion conditions of a gas burner, acquires a flame temperature relative to an air-fuel ratio of fuel and oxidizer supplied to the gas burner, calculates a flow velocity of the fuel immediately after combustion in the gas burner based on the combustion conditions of the gas burner and the flame temperature relative to the air-fuel ratio, and calculates an emission direction of the fuel immediately after combustion based on the combustion conditions of the gas burner and the calculated flow velocity of the fuel immediately after combustion. [Effects of the Invention]

[0007] In one aspect of the present disclosure, the combustion state of a flame can be predicted. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram illustrating an example of the configuration of an information processing device. [Figure 2] FIG. 10 is an explanatory diagram of actual measurement data of flame length. [Figure 3] FIG. 4 is an explanatory diagram of actual measurement data of the flow rates of fuel and oxidizer. [Figure 4] FIG. 4 is an explanatory diagram of actual measurement data of the flow rates of fuel and oxidizer. [Figure 5] FIG. 10 is an explanatory diagram of actual measurement data of flame temperature according to air-fuel ratio. [Figure 6] FIG. 10 is an explanatory diagram of actual measurement data of flame temperature according to air-fuel ratio. [Figure 7] FIG. 10 is an explanatory diagram of a flow velocity calculation process. [Figure 8] FIG. 10 is an explanatory diagram of a calculation process for the change in flow velocity over time. [Figure 9] FIG. 10 is an explanatory diagram of a calculation process for the change in flow velocity over time. [Figure 10] FIG. 10 is an explanatory diagram of a calculation process of an emission direction. [Figure 11] 10 is a flowchart illustrating an example of a process procedure for predicting the combustion state of a flame. [Figure 12] FIG. [Figure 13]FIG. 10 is an explanatory diagram of a calculation process of emissivity. [Figure 14] FIG. 1 is a cross-sectional view of a 3D shape model of a structure and an object to be heated inside a heat treatment furnace. [Figure 15] 10 is a flowchart showing an example of a procedure for predicting a heating state in a heat treatment furnace. [Figure 16] FIG. 10 is an explanatory diagram showing an example of a screen displaying a simulation result. DETAILED DESCRIPTION OF THE INVENTION

[0009] An information processing device, a program, and an information processing method according to the present disclosure will be described in detail below with reference to the drawings illustrating embodiments thereof.

[0010] (Embodiment 1) In this embodiment, an information processing device that predicts the combustion state of a flame generated by a gas burner used as a heat source in a heat treatment furnace will be described. FIG. 1 is a block diagram showing an example of the configuration of the information processing device. The information processing device 10 is a device capable of various information processing and information transmission / reception, and is configured, for example, as a personal computer or a server computer. The information processing device 10 includes a control unit 11, a memory unit 12, a communication unit 13, an input unit 14, a display unit 15, a reading unit 16, etc., and these units are connected via a bus. The control unit 11 includes one or more processors, such as a CPU (Central Processing Unit), an MPU (Micro-Processing Unit), or a GPU (Graphics Processing Unit). The control unit 11 appropriately executes a program P stored in the memory unit 12 to perform information processing and control processing to be performed by the information processing device 10. For example, the control unit 11 realizes a combustion condition acquisition function 11a, a flame temperature calculation function 11b, a flow velocity calculation function 11c, and an emission direction calculation function 11d. Details of each function will be described later. If the control unit 11 includes a plurality of processors, the control unit 11 may execute each process by using different processors.

[0011] The storage unit 12 includes a RAM (Random Access Memory), a flash memory, a hard disk, an SSD (Solid State Drive), etc. The storage unit 12 stores a program P (program product) executed by the control unit 11 and various data. The storage unit 12 also temporarily stores data and the like that is generated when the control unit 11 executes the program P. The storage unit 12 also stores a flame length calculation formula 12a, a flow rate calculation formula 12b, a flame temperature calculation formula 12c, a flow velocity calculation formula 12d, and an emission direction calculation formula 12e.

[0012] The communication unit 13 is a communication module for performing processes related to wired or wireless communication, and transmits and receives information to and from other devices via the network N. The network N may be the Internet or a public telephone network, or may be a LAN (Local Area Network) constructed within the facility where the information processing device 10 is installed. The input unit 14 accepts operation input by a user and sends a control signal corresponding to the operation content to the control unit 11. The display unit 15 is a liquid crystal display, an organic EL display, or the like, and displays various information according to instructions from the control unit 11. A part of the input unit 14 and the display unit 15 may be a touch panel configured as an integrated unit.

[0013] The reading unit 16 reads information stored in a portable storage medium 10a, such as a CD (Compact Disc), a DVD (Digital Versatile Disc), a USB (Universal Serial Bus) memory, an SD card, a micro SD card, or a CompactFlash (registered trademark). The program P and various data stored in the storage unit 12 may be read by the control unit 11 from the portable storage medium 10a via the reading unit 16 and stored in the storage unit 12. The program P and various data may be written to the storage unit 12 during the manufacturing stage of the information processing device 10, or may be downloaded by the control unit 11 from another device via the communication unit 13 and stored in the storage unit 12.

[0014] In this embodiment, the information processing device 10 may be a multi-computer including multiple computers, a virtual machine virtually constructed by software within a single device, or a cloud server. The program P may be deployed and executed on a single computer or at a single site, or may be distributed across multiple sites and deployed to be executed on multiple computers interconnected via a network N. Furthermore, the input unit 14 and the display unit 15 are not essential to the information processing device 10, and the information processing device 10 may be configured to accept operations through a connected computer or to output information to be displayed to an external display device.

[0015] In the information processing device 10 of this embodiment, the control unit 11 acquires actual measurement data indicating the combustion conditions (combustion state) of the gas burner measured during operation of the gas burner. An example of a gas burner is a high-speed gas burner that is supplied with fuel and oxidizer and emits a high-temperature, high-velocity flame from a nozzle. The fuel used for this gas burner is propane gas, butane gas, city gas, or the like, and the oxidizer used is air, oxygen, or the like. In this embodiment, a gas burner that is supplied with propane gas as fuel and air as an oxidizer will be described as an example. The actual measurement data indicating the combustion conditions of the gas burner includes the flow rates of fuel and oxidizer supplied to the gas burner and the flame length from the gas burner when controlled by each of a plurality of output control values ​​controllable for the gas burner. The output control value controllable for the gas burner can be any value between 100%, which corresponds to the maximum output of the gas burner, and 0%, which corresponds to the minimum output. The actual measurement data may be stored in another storage device connected to the information processing device 10, or may be stored in another storage device with which the information processing device 10 can communicate.

[0016] The control unit 11 also calculates a formula to be used for predicting the combustion state of the flame from the gas burner based on the actual measurement data, and predicts the combustion state of the flame using the calculated formula. In this embodiment, the combustion state of the flame is predicted as the flame temperature, the flow velocity and emission direction of the fuel immediately after combustion. Specifically, the control unit 11 calculates the flame temperature required to predict the flow velocity and emission direction of the fuel immediately after combustion, and calculates the flow velocity and emission direction of the fuel immediately after combustion using the calculated flame temperature. Note that "immediately after combustion" refers to the timing when the fuel before combustion (unburned fuel) changes to the fuel after combustion (burned fuel). The flow velocity of the fuel immediately after combustion is the emission velocity of the fuel (burned fuel) emitting from the boundary (flame front) where the unburned fuel changes to burned fuel, and the emission direction of the fuel immediately after combustion is the emission direction of the fuel (burned fuel) emitting from the flame front. The gas burner of this embodiment is configured such that a target temperature for an object to be heated is set, an output control value for achieving the target temperature is determined by a PID (Proportional Integral Differential Controller) or the like based on the difference between the set target temperature and the temperature of the object to be heated measured by a control thermocouple attached to the object to be heated, and fuel and oxidizer are supplied at flow rates in accordance with the determined output control value, thereby spraying a flame according to the supplied amounts of fuel and oxidizer. Note that, when actual measurement data of the gas burner is obtained, for example, the gas burner is controlled by an arbitrary output control value in manual mode, and the combustion state of the gas burner at this time is measured.

[0017] The process of acquiring actual measurement data of the gas burner will be described below. The actual measurement data includes the length of the flame (flame length) sprayed from the gas burner when the gas burner is controlled with a plurality of output control values, and the supply amounts (flow rates) of fuel and oxidizer supplied to the gas burner when controlled with a plurality of output control values.

[0018] The process for acquiring measured flame length data will now be described. FIG. 2 is an explanatory diagram of the measured flame length data. FIG. 2A shows the inside of a heat treatment furnace as viewed from the side. A gas burner flame nozzle (not shown) is provided on the upper surface (ceiling) of the heat treatment furnace, for example. The gas burner is supplied with fuel and oxidizer at flow rates corresponding to an arbitrarily set output control value, and a flame with a flame length corresponding to the output control value is sprayed vertically downward from the nozzle. In FIG. 2A, the sprayed flame is indicated by a white triangle. The control unit 11 measures the flame length of the captured flame based on a captured image of the flame sprayed when the gas burner is controlled at each output control value. The process for measuring the flame length based on the captured image can be realized by comparing the length of the flame with the length of a reference subject in the captured image. Alternatively, a template image showing the shape of the flame (triangle) may be prepared for each flame length, and the flame length in the image may be identified by template matching based on the template image. FIG. 2B shows a graph plotting flame lengths when the gas burner is controlled at output control values ​​of 30%, 50%, 70%, and 100%, with the horizontal axis representing the output control value and the vertical axis representing the flame length. The output control values ​​used to measure the flame length are not limited to the four values ​​described above and can be any value between 0% and 100%. Based on the flame lengths corresponding to the multiple output control values ​​acquired as described above, the control unit 11 calculates an approximation formula (flame length calculation formula 12a) that shows the relationship between the output control value and the flame length. Flame length calculation formula 12a is calculated, for example, using the least squares method. For the measurement results in FIG. 2B, where X is the output control value and Y is the flame length, y = 1.448x + 248.05 is obtained. This allows the flame length in the gas burner to be modeled relative to the output control value. In the gas burner used here, no flame was injected when the output control value was 20% or less, and when the output control value was more than 20% and less than 30%, the flame was injected intermittently and not stably. Therefore, the control unit 11 acquires a flame length calculation formula 12a that can predict the flame length corresponding to the output control value based on the flame length when the output control value is 30% or more and 100% or less.

[0019] The process of acquiring measured data on the supply amounts (flow rates) of fuel and oxidizer will be described. FIGS. 3 and 4 are explanatory diagrams of measured data on the flow rates of fuel and oxidizer. FIG. 3A is a graph showing the temporal changes in the volumetric flow rates of fuel and oxidizer measured for two gas burners, with the horizontal axis representing time and the vertical axis representing the volumetric flow rates of fuel (gas) and oxidizer (air). The graph in FIG. 3A shows the volumetric flow rates of fuel and oxidizer supplied to the gas burners when the gas burners are controlled for a certain period of time (approximately 3 minutes) at output control values ​​of 30%, 50%, 70%, and 100%. In the graph in FIG. 3A, the volumetric flow rate of fuel for the first gas burner is shown by a solid line, the volumetric flow rate of oxidizer by a dashed line, the volumetric flow rate of fuel for the second gas burner by a dashed line, and the volumetric flow rate of oxidizer by a two-dot chain line. The volumetric flow rates of the fuel and oxidizer are measured by flow meters provided in a supply unit that supplies the fuel and oxidizer to the gas burner, and the control unit 11 acquires the volumetric flow rates of the fuel and oxidizer measured by the flow meters. Based on the volumetric flow rates of the fuel and oxidizer shown in FIG. 3A, the control unit 11 calculates the average value of the volumetric flow rates of the fuel and oxidizer over the time period controlled by each output control value, thereby acquiring the volumetric flow rates of the fuel and oxidizer corresponding to the output control value. FIG. 3B is a graph showing the volumetric flow rates of the fuel and oxidizer corresponding to the output control value, calculated based on the volumetric flow rates of the fuel and oxidizer shown in FIG. 3A, with the output control value on the horizontal axis and the volumetric flow rates of the fuel (Gas) and oxidizer (Air) on the vertical axis. In the graph of FIG. 3B, the volumetric flow rate of the fuel of the first gas burner is indicated by a solid line, the volumetric flow rate of the oxidizer is indicated by a dashed line, the volumetric flow rate of the fuel of the second gas burner is indicated by a dashed line, and the volumetric flow rate of the oxidizer is indicated by a two-dot chain line. The control unit 11 calculates the mass flow rates of the fuel and oxidizer (hereinafter sometimes referred to as mass flow rates of fluid) corresponding to the output control value based on the following formula (1) from the volumetric flow rates of the fuel and oxidizer corresponding to the output control value shown in Fig. 3B. However, the flow rate measuring instrument used in this embodiment for measuring the volumetric flow rate of the fuel and the volumetric flow rate of the oxidizer of the gas burner has a measurement unit of m 3 / h, it is divided by 3600 to obtain the mass flow rate per unit time (1 second). Therefore, equation (1) may be modified according to the measurement units of the flow measurement instrument. FIG. 4 is a graph showing the mass flow rate of the fluid as a function of the output control value, calculated based on the volumetric flow rates of the fuel and oxidizer as a function of the output control value shown in FIG. 3B, with the horizontal axis representing the output control value and the vertical axis representing the mass flow rate of the fluid. In the graph of FIG. 4, the mass flow rate of the fluid of the first gas burner is shown by a solid line, and the mass flow rate of the fluid of the second gas burner is shown by a dashed line.

[0020] Mass flow rate = {(volume flow rate of fuel × density of fuel / 3600) + (volume flow rate of oxidizer × density of oxidizer / 3600)} ... (1)

[0021] The control unit 11 calculates an approximation formula (flow rate calculation formula 12b) showing the relationship between the output control value and the mass flow rate based on the mass flow rates of the fluid corresponding to the multiple output control values ​​acquired as described above. Flow rate calculation formula 12b is calculated, for example, by the least squares method. In the case of the measurement results in FIG. 4, where X is the output control value and Y is the mass flow rate, for example, for the mass flow rate of the first gas burner shown by the solid line, y = 0.0000064380x + 0.0233066562 is obtained for an output control value between 30% and 70%, and y = 0.0013168915x - 0.0683929251 is obtained for an output control value between 70% and 100%. This makes it possible to model the mass flow rate of the fluid, including the fuel and oxidizer, corresponding to the output control value in the gas burner. Again, the control unit 11 acquires flow rate calculation formula 12b capable of predicting the mass flow rate of the fluid corresponding to the output control value when the output control value is between 30% and 100%. In addition to flow rate calculation formula 12b, control unit 11 may calculate an approximation formula showing the relationship between the output control value and the air-fuel ratio. In this case, the approximation formula can be used to calculate the air-fuel ratio for each output control value. Furthermore, flow rate calculation formula 12b may include an approximation formula showing the relationship between the output control value and the volumetric flow rate of fuel, and an approximation formula showing the relationship between the output control value and the volumetric flow rate of oxidizer. In this case, control unit 11 may use flow rate calculation formula 12b to calculate the volumetric flow rates of fuel and oxidizer for each output control value, and calculate the air-fuel ratio for each output control value from the calculation results.

[0022] Next, a process for acquiring measured data of the flame temperature according to the air-fuel ratio (ratio of oxidizer (air) to fuel) of the fuel and oxidizer supplied to the gas burner will be described. FIGS. 5 and 6 are explanatory diagrams of measured data of the flame temperature according to the air-fuel ratio. FIG. 5A is a graph showing the time on the horizontal axis and the set temperature of the control thermocouple on the vertical axis, illustrating the time change of the target temperature set for the control thermocouple. When the set temperature shown in FIG. 5A is set for the control thermocouple, the control unit 11 acquires the flow rates of the fuel and oxidizer supplied to the gas burner and calculates the air-fuel ratio based on the acquired flow rates of the fuel and oxidizer. FIG. 5B is a graph showing the time change of the air-fuel ratio, showing the time on the horizontal axis and the air-fuel ratio on the vertical axis. The control unit 11 also performs one-dimensional laminar premixed flame combustion analysis to calculate the flame temperature for the air-fuel ratio in the gas burner from the time change of the air-fuel ratio shown in FIG. 5B. FIG. 6 is a graph showing the change in flame temperature according to the air-fuel ratio obtained by analyzing the measurement results (time-dependent changes in air-fuel ratio) shown in FIG. 5B, with the horizontal axis representing the air-fuel ratio and the vertical axis representing the flame temperature. The control unit 11 calculates an approximation formula (flame temperature calculation formula 12c) showing the relationship between the air-fuel ratio and the flame temperature based on the flame temperature according to the air-fuel ratio obtained by one-dimensional laminar premixed flame combustion analysis. Flame temperature calculation formula 12c is calculated, for example, by the least squares method. In the case of the measurement results of FIG. 6, where X is the air-fuel ratio and Y is the flame temperature, flame temperature calculation formula 12c is obtained as y = -707.19x + 2161.8. This makes it possible to model the flame temperature versus the air-fuel ratio in a gas burner.

[0023] Next, a process for calculating the emission velocity (hereinafter referred to as flow velocity) of fuel immediately after combustion when it is emitted from the flame front (the boundary surface where fuel before combustion changes into fuel after combustion) will be described. FIG. 7 is an explanatory diagram of the flow velocity calculation process. FIG. 7 schematically shows a gas burner and a flame ejected from the gas burner nozzle (the tip of the ejection nozzle). The cross-sectional area A in FIG. 7 indicates the cross-sectional area of ​​the nozzle. In this embodiment, it is assumed that the cross section of the gas burner nozzle is circular, the flame shape is conical, and the flame front is a conical surface. The dashed line area in FIG. 7 is an enlarged dashed line area surrounding a part of the flame front. The flow velocity of fuel immediately after combustion is calculated using the following equations (2) to (4) (flow velocity calculation equation 12d). That is, the control unit 11 calculates the flow velocity u of fuel immediately after combustion by b is the flame temperature (unburned fuel temperature T u , the temperature of the burned fuel T b ), mass flow rate, inclination angle of the flame front relative to the vertical θ0, density of the fluid depending on the flame temperature (density of unburned fuel ρ u ) and the cross-sectional area of ​​the nozzle A. The flame temperature (temperature of the burned fuel T b ) can be calculated from the relational expression between the air-fuel ratio and the flame temperature shown in Figure 6, and the air-fuel ratio is calculated from the relational expression between the power control value and the volumetric flow rate of the fuel and oxidizer shown in Figure 3B. The mass flow rate is calculated from the relational expression between the power control value and the mass flow rate shown in Figure 4. The inclination angle of the flame front is calculated from the radius of the cross section of the nozzle and the flame length. The density of the fluid is calculated from the equation of state. The temperature T of the unburned fuel u A preset temperature may be used.

[0024]

number

[0025] The flow velocity of the fuel immediately after combustion is u b and the flow velocity u b The normal component of the flame surface is u b⊥ and the flow velocity u b The downward component (flame propagation speed) along the flame front is u b∥ If so, the flow velocity u bis expressed by equation (2). Also, assuming that the fluid pressure is the same on the unburned fuel side and the burned fuel side of the flame front, the density of the unburned fuel is ρ u , the density of the burned fuel is ρ b , unburned fuel flow rate (supply rate) u u The normal component of the flame surface is u u⊥ Then, the first equation of equation (3) holds for the normal component to the flame surface. By transforming this first equation, u b⊥ =ρ u / ρ b ·u u⊥ is obtained, and the temperature of the burned fuel is T b and the temperature of the unburned fuel is T u From the equation of state, the second equation of equation (3) is obtained. Also, if the inclination angle of the flame front relative to the vertical direction is θ0, then u u⊥ =u u ·sinθ0, and u u is the mass flow rate of the fluid and the density of the unburned fuel, ρ u and the cross-sectional area A of the nozzle, the three equations in equation (3) can be obtained. In addition, for the parallel component to the flame front, the flow velocity of the burned fuel u b The parallel component u b∥ and the flow rate of unburned fuel u u The parallel component u u∥ What is u b∥ =u u∥ and u u∥ u u∥ =u u cosθ0. Also, u u is the mass flow rate of the fluid and the density of the unburned fuel, ρ u and the cross-sectional area A of the nozzle, equation (4) can be obtained. By substituting the third equation of equation (3) into the second equation, u b⊥ and u obtained from equation (4) b∥ By substituting into equation (2), the flow velocity of the fuel immediately after combustion, u b can be calculated.

[0026] Through the above-described processing, the control unit 11 acquires the flame length corresponding to the output control value for controlling the gas burner, the mass flow rates of the fuel and oxidizer (fluid) corresponding to the output control value, the flame front inclination angle θ0 calculated from the flame length and the cross-sectional area A of the nozzle, the flame temperature relative to the air-fuel ratio based on the volumetric flow rates of the fuel and oxidizer, and the flow velocity of the fuel immediately after combustion. Furthermore, to reproduce the time-varying combustion state of the flame of the gas burner, the control unit 11 calculates the time-varying flame length, mass flow rate, flame front inclination angle θ0, flame temperature, and flow velocity corresponding to the output control value based on the time-varying output control value for the gas burner. FIGS. 8 and 9 are explanatory diagrams of the calculation process for the time-varying flow velocity. The control unit 11 acquires the time-varying volumetric flow rates of the fuel and oxidizer supplied to the gas burner when the target temperature shown in FIG. 5A is set for the control thermocouple. FIG. 8A is a graph showing the time-varying volumetric flow rates of the fuel and oxidizer, with the horizontal axis representing time and the vertical axis representing the volumetric flow rates of the fuel and oxidizer. The graph in FIG. 8A shows the volumetric flow rates (actually measured data) of fuel for the two gas burners on the lower side, and the volumetric flow rates (actually measured data) of oxidizer for the two gas burners on the upper side. The control unit 11 calculates the mass flow rate of the fluid at each time using the above formula (1) from the volumetric flow rates of fuel and oxidizer at each time (time instant) shown in FIG. 8A. This results in the calculation results shown in FIG. 8B. FIG. 8B is a graph showing the change over time in the mass flow rate of the fluid for the two gas burners, with the horizontal axis representing time and the vertical axis representing the mass flow rate of the fluid.

[0027] The control unit 11 acquires the mass flow rate versus output control value as shown in FIG. 4 as the combustion condition of the gas burner, and acquires the time change of the output control value for the gas burner (the output control value at each time) based on the mass flow rate versus output control value and the time change of the mass flow rate of the fluid as shown in FIG. 8B (the mass flow rate of the fluid at each time). The graph in FIG. 8C shows the time change of the output control value for the gas burner, with the horizontal axis representing time and the vertical axis representing the output control value. The control unit 11 also acquires the flame length versus output control value as the combustion condition of the gas burner, as shown in FIG. 2B, and acquires the time change of the flame length (the flame length at each time) based on the flame length versus output control value and the time change of the output control value as shown in FIG. 8C. The upper graph in FIG. 9A shows the time change of the flame length, with the horizontal axis representing the flame length and the vertical axis representing the flame length. The control unit 11 also calculates the inclination angle θ0 of the flame front due to the flame length at each time based on the time change of the flame length. The graph at the bottom of FIG. 9A shows time on the horizontal axis and inclination angle θ0 on the vertical axis, indicating the change over time of inclination angle θ0. Furthermore, the control unit 11 calculates the flame temperature at each time based on the change over time of the volumetric flow rates of the fuel and oxidizer shown in FIG. 8A and the flame temperature versus air-fuel ratio shown in FIG. 6. The control unit 11 then calculates the change over time of the flow velocity of the fuel immediately after combustion (the flow velocity of the fuel immediately after combustion at each time) using the above equations (2) to (4) based on the change over time of the mass flow rate shown in FIG. 8B, the inclination angle θ0 of the flame front at each time, and the flame temperature at each time. The graph in FIG. 9B shows time on the horizontal axis and flow velocity on the vertical axis, indicating the change over time of the flow velocity of the fuel immediately after combustion. Through the above processing, the control unit 11 can simulate the flow velocity of the fuel immediately after combustion based on the modeled flame length corresponding to the power control value of the gas burner, the mass flow rate of the fluid corresponding to the power control value, and the flame temperature corresponding to the air-fuel ratio.

[0028] Next, we will explain the process of calculating the direction of emission of fuel immediately after combustion from the flame front. Figure 10 is an explanatory diagram of the process of calculating the emission direction. Figure 10 shows the flame front and the axis indicating the center of the flame front. Through the process up to this point, we have calculated the inclination angle θ0 of the flame front at each time and the vertical component V of the flow velocity V of the fuel immediately after combustion relative to the flame front at each time. vand the parallel component V h (flame propagation speed) are known, and the control unit 11 calculates the direction of fuel emission immediately after combustion using the following formula (5) (emission direction calculation formula 12e). Note that, as will be described later, the emission direction can be expressed as 1 (unit vector) in the radial direction and Tanθ3 in the axial direction, where the direction of the central axis of the flame (vertical direction) is the axial direction and the direction perpendicular to the axial direction (horizontal direction) is the radial direction.

[0029] θ3=π / 2-Tan -1 (V v / V h )-θ0…(5)

[0030] The calculation method for formula (5) will be explained below. In the cylindrical coordinate system, the angle θ1 between the flow velocity V and the flame front is θ1=Tan -1 (V v / V h ) can be obtained. Also, if a line parallel to the central axis of the flame is drawn from the position where the burned fuel emerges on the flame surface, the angle θ1 between the flow velocity V and the flame surface is It is expressed as θ1=θ0+θ2, where θ2 is θ2=Tan -1 (V v / V h )-θ0. In addition, if the vector representing the flow velocity V is translated to the central axis of the flame, and a unit vector is taken in the radial direction from the base end on the central axis of the translated vector, the angle θ3 between the translated vector and the unit vector can be calculated using θ2 as follows: θ3=π / 2-θ2=π / 2-Tan -1 (V v / V h )-θ0. Therefore, the control unit 11 can express the direction of emission of fuel immediately after combustion as a direction of 1 (unit vector) in the radial direction and Tan θ3 in the axial direction, using θ3 calculated using equation (5).

[0031] The following describes a process for predicting the combustion state of a flame from a gas burner. FIG. 11 is a flowchart showing an example of a process procedure for predicting the combustion state of a flame. When performing a simulation process for the combustion state of a flame, the control unit 11 of the information processing device 10 of this embodiment acquires actual measurement data measuring the flame length versus the output control value as shown in FIG. 2B for the gas burner to be simulated, and calculates flame length calculation formula 12a. The control unit 11 also acquires actual measurement data measuring the volumetric flow rates of fuel and oxidizer versus the output control value as shown in FIG. 3B, and calculates flow rate calculation formula 12b by acquiring the mass flow rate of the fluid versus the output control value as shown in FIG. 4 using the acquired actual measurement data and formula (1). Furthermore, the control unit 11 acquires the flame temperature versus the air-fuel ratio as shown in FIG. 6 by one-dimensional laminar premixed flame combustion analysis from the time change in the air-fuel ratio as shown in FIG. 5B, and calculates flame temperature calculation formula 12c.

[0032] The control unit 11 (combustion condition acquisition function 11a) of the information processing device 10 acquires from the storage unit 12 the flame length calculation formula 12a, the flow rate calculation formula 12b, and the flame temperature calculation formula 12c calculated for the gas burner to be simulated (S11). This allows the control unit 11 to acquire the combustion conditions of the gas burner to be processed. The control unit 11 also acquires, as simulation conditions (S12), the time change in the output control value for controlling the gas burner (the output control value at each time). In this embodiment, the time change in the output control value is used as the simulation condition. Alternatively, the time change (temperature pattern) of the target temperature of the object to be heated by the gas burner (the control thermocouple) may also be used as the simulation condition. In this case, the output control value for achieving the target temperature at each time is determined by PID control or the like, and the gas burner sprays a flame with fuel and oxidizer at flow rates corresponding to the determined output control value. Therefore, the control unit 11 calculates an output control value for achieving the target temperature at each time using PID control or the like based on the difference between the time change of the target temperature obtained as a simulation condition and the temperature of the object to be heated measured at each time, and performs processing from step S13 onwards.

[0033] Combustion condition acquisition function 11a calculates the flame length (time change of flame length) at each time from the time change of the output control value, which is a simulation condition, using flame length calculation formula 12a (S13). Combustion condition acquisition function 11a also calculates the mass flow rate of the fluid at each time (time change of mass flow rate) from the time change of the output control value using flow rate calculation formula 12b (S14). Combustion condition acquisition function 11a also calculates the air-fuel ratio at each time (time change of air-fuel ratio) from the time change of the output control value using an approximation formula showing the relationship between the output control value and the air-fuel ratio (S15). Alternatively, combustion condition acquisition function 11a may calculate the volumetric flow rates of fuel and oxidizer at each time from the time change of the output control value using an approximation formula showing the relationship between the output control value and the volumetric flow rates of fuel and oxidizer, and then calculate the mass flow rate at each time (time change of mass flow rate) and the air-fuel ratio at each time (time change of air-fuel ratio) from the calculation results.

[0034] Next, the control unit 11 (flame temperature calculation function 11b) calculates the flame temperature (time change of flame temperature) at each time from the time change of the air-fuel ratio calculated in step S15 using flame temperature calculation formula 12c (S16). Next, the control unit 11 (flow velocity calculation function 11c) calculates the flow velocity (time change of flow velocity) of the fuel immediately after combustion at each time from the time change of the flame length calculated in step S13, the time change of the mass flow rate calculated in step S14, and the time change of the flame temperature calculated in step S16 (S17). Specifically, the flow velocity calculation function 11c calculates the inclination angle (time change of inclination angle) of the flame front with respect to the vertical direction at each time from the time change of the flame length and the cross-sectional area of ​​the gas burner nozzle. Furthermore, the flow velocity calculation function 11c calculates the density (time change of density) of the fluid (fuel immediately after combustion) at each time from the time change of the flame temperature based on the equation of state. Then, the flow velocity calculation function 11c uses a flow velocity calculation formula 12d to calculate the flow velocity at each time from the time change in the mass flow rate, the time change in the inclination angle of the flame front, and the time change in the density of the fluid.

[0035] Next, the control unit 11 (ejection direction calculation function 11d) calculates the ejection direction of the fuel immediately after combustion at each time (time change in ejection direction) from the time change in the flow velocity and the time change in the inclination angle using the ejection direction calculation formula 12e (S18). Specifically, the ejection direction calculation function 11d calculates the vertical component V of the flow velocity V at each time relative to the flame front, which was calculated when calculating the flow velocity at each time in step S17. v and the parallel component V h and the tilt angle θ0 at each time, the emission direction at each time is calculated.

[0036] By the above-described processing, it is possible to predict the combustion state of the flame when the gas burner is controlled under the simulation conditions based on the time change of the output control value for the gas burner set as the simulation conditions. Specifically, it is possible to predict the flame temperature at each time, the flow velocity and emission direction of the fuel immediately after combustion in correspondence with the output control value at each time, and to reproduce the combustion state of the flame (heat source) by simulation.

[0037] In this embodiment, the control unit 11 of the information processing device 10 calculates the flame length calculation formula 12a, the flow rate calculation formula 12b, and the flame temperature calculation formula 12c based on actual measurement data measured during operation of the gas burner, but this configuration is not limited to this. For example, another information processing device may calculate each or all of the flame length calculation formula 12a, the flow rate calculation formula 12b, and the flame temperature calculation formula 12c. In this case, the information processing device 10 simply acquires the flame length calculation formula 12a, the flow rate calculation formula 12b, and the flame temperature calculation formula 12c calculated by the other information processing device from the other information processing device and stores them in the storage unit 12.

[0038] (Embodiment 2) In this embodiment, an information processing device will be described that predicts the heating state inside a heat treatment furnace when the heat treatment furnace is heated using a gas burner whose flame combustion state is modeled in the above-described embodiment 1. Specifically, the heating state inside the heat treatment furnace is predicted when the heat treatment furnace is operated by setting an arbitrary heating temperature for an arbitrary heating time. The information processing device of this embodiment has a configuration similar to that of the information processing device 10 of embodiment 1 shown in FIG. 1, and therefore a description of the configuration will be omitted.

[0039] FIG. 12 is an explanatory diagram of a heat treatment furnace. FIG. 12A is a perspective view of a heat treatment furnace 100. The heat treatment furnace 100 has an outer shell 100a that forms a housing, and a refractory material 101 that is provided adjacent to the outer shell 100a and covers the inner surface of the outer shell 100a. The area surrounded by the refractory material 101 forms a heating space (fluid space). In FIG. 12A, the outer shell 100a and the two side surfaces of the refractory material 101 are not shown so that the interior of the heat treatment furnace 100 can be seen. A loading table 103 and a rail 104 held by the loading table 103 are provided at the bottom of the fluid space surrounded by the refractory material 101, and mounting holes 102 for mounting gas burners are provided in the ceiling portions of the outer shell 100a and the refractory material 101. In the heat treatment furnace 100 configured as described above, a rod-shaped (long, thin, cylindrical) treatment object 106 is housed in the heat treatment furnace 100 with both ends placed on a mounting member 105 that moves in and out of the heat treatment furnace 100 along rails 104. The treatment object 106 is then heated from above by a flame from a gas burner attached to the attachment hole 102.

[0040] In the information processing device 10 of this embodiment, the control unit 11 acquires thermophysical property information (thermodynamic property values) of structures in a heat treatment furnace and objects to be treated (objects to be heated) placed in the heat treatment furnace. For example, the control unit 11 acquires thermophysical property information for each of the refractory material 101, the loading platform 103, and the rails 104 from the type and content of the material using JMatPro (registered trademark). As shown in FIG. 12B , the thermophysical property information includes temperature-dependent changes in density, specific heat, thermal conductivity, and thermal diffusivity. Note that the thermophysical property information may also be acquired by actual measurement.

[0041] The control unit 11 also calculates the emissivity of the structure and the object to be treated based on the time-dependent change in the surface temperature of the structure and the object to be treated inside the heat treatment furnace measured while the heat treatment furnace is heated by the gas burner. In this embodiment, the control unit 11 calculates the emissivity of the inner surface (furnace wall) of the refractory material 101 and the object to be treated. FIG. 13 is an explanatory diagram of the emissivity calculation process. The graph in FIG. 13A shows time on the horizontal axis and temperature on the vertical axis, and shows the time-dependent change in temperature measured (actually measured) when the set temperature for the control thermocouple is set to, for example, the temperature shown in FIG. 5A. Note that the solid line in the graph in FIG. 13A shows the time-dependent change in the furnace wall temperature, and the dashed line shows the time-dependent change in the temperature of the object to be treated. The temperature of the furnace wall is, for example, the temperature at any point on two opposing side surfaces (for example, at a position approximately the same height as the position where the object to be treated 106 is placed), and the temperature of the object to be treated is, for example, the temperature at the center of both end surfaces and the center of the top surface of the object to be treated 106.

[0042] When calculating the emissivity, the control unit 11 analyzes the temperature change over time of the object to be processed for each of multiple emissivities. The graph in FIG. 13B shows time on the horizontal axis and temperature on the vertical axis, with the solid line representing the measured temperature change over time and the dashed line representing the temperature change over time for the object with emissivities a to c. The temperature change over time for the object with emissivities a to c is the temperature change over time when the gas burner is controlled under the same control conditions as when the actual measurement was performed. As shown in FIG. 13B, analysis is performed on emissivities including an emissivity that results in a temperature higher than the measured temperature (emissivity a in FIG. 13B) and an emissivity that results in a temperature lower than the measured temperature (emissivities b and c in FIG. 13B). The control unit 11 calculates the emissivity where the difference between the temperature change over time based on the multiple emissivities a to c and the measured temperature change over time is close to zero, thereby determining the emissivity of the object. Specifically, the control unit 11 calculates the difference by subtracting the temperature calculated for each emissivity a to c from the actually measured temperature for multiple time periods (times), and generates a graph showing the relationship between the difference and the emissivity from the calculation results. The graph in FIG. 13C shows the emissivity on the horizontal axis and the difference on the vertical axis. The difference calculated for the emissivity a is plotted as a white circle, the difference calculated for the emissivity b is plotted as a white triangle, and the difference calculated for the emissivity c is plotted as a white square for five time periods: 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours after the start of heating. The control unit 11 calculates an approximation formula showing the relationship between the emissivities a to c and the difference between each of the emissivities a to c for each time period, for example, by the least squares method. The approximation formula can be a linear function (straight line) or a polynomial function. Then, the control unit 11 uses the approximation formula calculated for each time to calculate the emissivity (emissivity indicated by a black circle in FIG. 13C) for which the difference is 0, and determines the emissivity of the object by calculating the average value of the calculation results (here, the emissivities calculated for five times).

[0043] In this embodiment, when predicting (simulating) the heating state in a heat treatment furnace, the control unit 11 uses a general-purpose 3D CAD (three-dimensional computer-aided design) to generate a 3D shape model (geometry) of the structures in the heat treatment furnace and the object to be heated. FIG. 14 is a cross-sectional view of the 3D shape model of the structures in the heat treatment furnace and the object to be heated. The left side of FIG. 14 shows the 3D shape model of the structures in the heat treatment furnace and the object to be heated, and the right side of FIG. 14 shows an enlarged view of the 3D shape model of the gas burner in the 3D shape model. The control unit 11 uses the 3D CAD to generate 3D data (three-dimensional shape data) representing the shapes of the structures in the heat treatment furnace (the outer shell 100a, the refractory material 101, the loading platform 103, and the rails 104) and the object to be heated based on a design drawing of the heat treatment furnace to be treated. The control unit 11 also receives the shapes of the gas burner and the flame from the gas burner via the input unit 14 and generates 3D data representing the received shapes. The control unit 11 then places the 3D data of the gas burner in the mounting hole 102 of the 3D data of the heat treatment furnace, and places the 3D data of the flame pointing downward from the gas burner nozzle, thereby generating a 3D shape model of the structure inside the heat treatment furnace and the object to be heated. The 3D shape model is generated assuming the shape of the gas burner as a cylinder and the shape of the flame as a cone. The flame length is also assumed to be the average value of the flame lengths corresponding to each output control value, for example, as shown in FIG. 2B, and the tip of the flame is assumed to be a hemisphere.

[0044] The control unit 11 performs a meshing process using a general-purpose mesher (mesh generation tool) to divide the 3D geometric model of the structure and the heated object in the heat treatment furnace, generated as described above, into cells having minute volumes (hereinafter referred to as minute volume cells). The minute volume cells are, for example, polyhedral cells, and are divided into each component of the structure (refractory material 101, loading platform 103, rail 104, fluid space) and the treated object 106. The vicinity of the flame front and the periphery of the heated object are divided into minute volume cells to the extent that the geometric shape of each component is not impaired. The control unit 11 associates thermophysical property information (thermophysical property values) and emissivity of the structure and the heated object in the heat treatment furnace with each minute volume cell. Then, for each minute volume cell, the control unit 11 predicts the temperatures of the structure and the heated object in the heat treatment furnace based on the associated thermophysical property information and emissivity, the gas burner flame temperature, and the flow velocity and emission direction of the fuel immediately after combustion. The control unit 11 performs simulation processing to predict the temperatures of the structures and objects to be heated in the heat treatment furnace by setting the above-mentioned conditions for each microvolume cell for a turbulence model for predicting the turbulent state of the fluid in the fluid space, a convection and conduction heat transfer model for predicting the convection and conduction heat transfer states, and a radiation model for predicting the radiation state. For example, sst-kω, RANS (Reynolds Averaged Navier Stokes), LES (Large Eddy Simulation), or DNS (Direct Numerical Simulation) is used as the turbulence model, an energy equation (thermodynamic equation of state) is used as the convection and conduction heat transfer model, and an S2S (surface-to-surface radiation model) or DO (discrete coordinates radiation model) is used as the radiation model.

[0045] Furthermore, since the control unit 11 uses the time change in the output control value for the gas burner as a simulation condition, it is possible to predict the time change in the temperature of the structure in the heat treatment furnace and the object to be heated. The control unit 11 calculates the flame temperature of the gas burner from the combustion conditions of the gas burner (the flow rates of fuel and oxidizer relative to the output control value, and the flame length) and the flame temperature relative to the air-fuel ratio, calculates the flow velocity of the fuel immediately after combustion from the combustion conditions of the gas burner and the flame temperature, and calculates the emission direction of the fuel immediately after combustion from the flow velocity of the fuel immediately after combustion and the inclination angle of the flame front.

[0046] The following describes a process for predicting the heating state in a heat treatment furnace, specifically, the time-dependent change in the temperature of the structures and objects to be processed in the heat treatment furnace. FIG. 15 is a flowchart showing an example of the procedure for predicting the heating state in a heat treatment furnace. Step S25 in FIG. 15 is a simulation process for predicting the combustion state of the flame shown in FIG. 11. When performing a simulation process for the heating state in a heat treatment furnace, the control unit 11 of the information processing device 10 acquires thermophysical property information and emissivity of the structures and objects to be processed in the heat treatment furnace, as well as 3D shape models of the structures and objects to be processed in the heat treatment furnace created using 3D CAD, and stores them in the storage unit 12. Similarly to the first embodiment, the control unit 11 calculates a flame length calculation formula 12a, a flow rate calculation formula 12b, and a flame temperature calculation formula 12c for each gas burner used in the simulation process and stores them in the storage unit 12. In this embodiment, the control unit 11 calculates the flame length calculation formula 12a, the flow rate calculation formula 12b, and the flame temperature calculation formula 12c for each gas burner used in the simulation process and stores them in the storage unit 12.

[0047] The control unit 11 acquires, from the storage unit 12, thermophysical property information and emissivity of the structure and the processing object in the heat treatment furnace to be simulated (S21). The control unit 11 also acquires, from the storage unit 12, a 3D shape model (3D data) of the heat treatment furnace to be simulated (S22). The control unit 11 divides the acquired 3D shape model into minute volume cells (S23). Specifically, the control unit 11 divides the refractory material 101, the loading platform 103, the rail 104, the processing object 106, and the fluid space in the 3D shape model into minute volume cells. The control unit 11 associates the thermophysical property information for the structure and the processing object acquired in step S21 with the corresponding minute volume cells (S24). Furthermore, when each minute volume cell includes a structure and a processing object, the control unit 11 associates the emissivity for the structure and the processing object acquired in step S21 with the minute volume cell.

[0048] 11 for each gas burner attached to the heat treatment furnace to be simulated, and performs a simulation process to predict the flame temperature at each time, the flow velocity of the fuel immediately after combustion, and the direction of emission based on the time change of the output control value set as the simulation conditions (S25). This makes it possible to obtain the combustion state of the flame for each gas burner attached to the heat treatment furnace to be simulated when the gas burner is controlled under each simulation condition.

[0049] The control unit 11 simulates the heating conditions in the heat treatment furnace by setting the turbulence model, convection and conduction heat transfer model, and radiation model with a 3D shape model of the heat treatment furnace to be simulated, the thermophysical property information and emissivity of each divided micro-volume cell, and the flame combustion state calculated for each gas burner (flame temperature at each time, fuel flow velocity and emission direction immediately after combustion), and acquires the temperature change over time (temperature at each time) at each position in the heat treatment furnace (fluid space) (S26). FIG. 16 is an explanatory diagram showing an example of a screen displaying the simulation results. The graph in FIG. 16 shows time on the horizontal axis and temperature on the vertical axis. The thin solid line indicates the time change of the measured surface temperature of the object to be treated in the heat treatment furnace, and the thick solid line indicates the time change of the surface temperature of the object to be treated calculated by the above-mentioned simulation process. From FIG. 16, it can be seen that the surface temperature of the object to be treated predicted by the simulation process of this embodiment and the actually measured surface temperature of the object to be treated are approximately the same. In other words, the processing of this embodiment enables a simulation process that can accurately reproduce the heating state inside a heat treatment furnace that uses a gas burner as a heat source. Furthermore, since the temperature can be predicted for each minute volume cell inside the heat treatment furnace, it is possible to predict temperature changes not only for the structures and the object to be treated inside the heat treatment furnace, but also for each minute volume cell in the fluid space. Furthermore, since the thermophysical property information of the object to be treated is set, it is possible to accurately predict the temperature at any location inside the object to be treated.

[0050] By using the above-described processing, the present embodiment can accurately reproduce the combustion state of the flame produced by the gas burner, and therefore the heating state inside a heat treatment furnace using such a gas burner can also be accurately reproduced. Furthermore, by using general-purpose solvers such as a turbulence model, a convection and conduction heat transfer model, and a radiation model, the heating state inside a heat treatment furnace using a gas burner as a heat source can be reproduced by simulation.

[0051] In the present embodiment, the process of calculating the thermal property information and emissivity of the structures and processing objects in the heat treatment furnace and the process of generating a 3D shape model of the structures and processing objects in the heat treatment furnace is not limited to being performed by the control unit 11 of the information processing device 10. For example, another information processing device may be configured to execute the process of calculating the thermal property information and emissivity of the structures and processing objects and / or the process of generating a 3D shape model of the heat treatment furnace. In this case, the information processing device 10 may acquire the thermal property information and emissivity calculated by the other information processing device and / or the 3D shape model of the heat treatment furnace generated by the other information processing device from the other information processing device and store them in the storage unit 12.

[0052] The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined not by the above meaning but by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0053] The technical features (constituent elements) described in each embodiment can be combined with each other, and by combining them, new technical features can be formed. Furthermore, the independent and dependent claims described in the claims can be combined with each other in any combination, regardless of the reference format. Furthermore, while the claims use a format in which a claim references two or more other claims (multiple claim format), this is not limited to this format. Multiple claims (multi-multi claims) that reference at least one other multiple claim may also be used. [Explanation of symbols]

[0054] 10. Information processing equipment 11 Control section 12 Storage section 13 Communications Department 14 Input section 15 Display section

Claims

1. In an information processing device having a control unit, The control unit Obtain the combustion conditions of the gas burner, obtaining a flame temperature relative to an air-fuel ratio of fuel and oxidizer supplied to the gas burner; calculating a flow velocity of the fuel immediately after combustion in the gas burner based on the combustion conditions of the gas burner and a flame temperature relative to the air-fuel ratio; Calculating the direction of emission of the fuel immediately after combustion based on the combustion conditions of the gas burner and the calculated flow velocity of the fuel immediately after combustion. Information processing device.

2. The control unit obtaining a three-dimensional shape model of a structure and a processing object in a heat treatment furnace using the gas burner as a heat source; Dividing the acquired three-dimensional shape model into cells each having a minute volume; Each divided cell is associated with the thermophysical property information of the structure and the object to be treated corresponding to each cell; A time change in the temperature of the object to be treated is predicted based on the thermophysical property information associated with each cell, the combustion conditions of the gas burner and the flame temperature relative to the air-fuel ratio, the flow velocity and emission direction of the fuel immediately after the combustion, and the emissivity of the structure and the object to be treated. The information processing device according to claim 1 .

3. The control unit acquiring flow rates of the fuel and oxidizer supplied to the gas burner and time changes in the temperatures of the structure and the object to be treated when the fuel and oxidizer at each flow rate are supplied to the gas burner; Calculating the emissivity of the structure and the object to be treated based on the acquired changes in temperature of the structure and the object to be treated over time The information processing device according to claim 2 .

4. The thermal property information of the structure and the object to be processed includes density, specific heat, thermal conductivity, and thermal diffusivity relative to temperature.

4. The information processing device according to claim 2 or 3.

5. The combustion conditions of the gas burner include a plurality of output control values ​​that can be controlled for the gas burner, and the flow rates of fuel and oxidizer supplied to the gas burner and the flame length from the gas burner when controlled at each output control value.

4. The information processing device according to claim 1.

6. The control unit calculating mass flow rates of the fuel and the oxidizer emitted from the gas burner based on volume flow rates of the fuel and the oxidizer supplied to the gas burner when an arbitrary heating temperature for an arbitrary heating time is set for the heat treatment furnace; Calculating a flame length from the gas burner based on combustion conditions of the gas burner; Calculating the flow velocity of the fuel immediately after the combustion based on the mass flow rates of the fuel and oxidizer and the flame length 4. The information processing device according to claim 2 or 3.

7. The control unit Based on the flame length from the gas burner and the flow velocity of the fuel immediately after combustion, the flame is assumed to be conical, and the conical surface is set as the ejection position of the fuel immediately after combustion, and the ejection direction of the fuel immediately after combustion from the ejection position is calculated.

4. The information processing device according to claim 1.

8. The control unit The temperature of each cell is predicted based on the thermophysical property information associated with each cell, the combustion conditions of the gas burner and the flame temperature relative to the air-fuel ratio, the flow velocity and emission direction of the fuel immediately after the combustion, and the emissivity of the structure and the object to be treated.

4. The information processing device according to claim 2 or 3.

9. Obtain the combustion conditions of the gas burner, obtaining a flame temperature relative to an air-fuel ratio of fuel and oxidizer supplied to the gas burner; calculating a flow velocity of the fuel immediately after combustion in the gas burner based on the combustion conditions of the gas burner and a flame temperature relative to the air-fuel ratio; Calculating the direction of emission of the fuel immediately after combustion based on the combustion conditions of the gas burner and the calculated flow velocity of the fuel immediately after combustion. A program that causes a computer to perform a process.

10. Obtain the combustion conditions of the gas burner, obtaining a flame temperature relative to an air-fuel ratio of fuel and oxidizer supplied to the gas burner; calculating a flow velocity of the fuel immediately after combustion in the gas burner based on the combustion conditions of the gas burner and a flame temperature relative to the air-fuel ratio; Calculating the direction of emission of the fuel immediately after combustion based on the combustion conditions of the gas burner and the calculated flow velocity of the fuel immediately after combustion. An information processing method in which processing is performed by a computer.

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