Method, device and apparatus for predicting thermal radiation flux received by a target object

Abstract

The present application provides a method, device and equipment for predicting the thermal radiation flux received by a target object, and relates to the field of fire protection technology. The method includes: when predicting the target thermal radiation flux received by the target object, the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank can be first obtained; and based on the area and distance of the oil storage tank, the thermal radiation flux of the flame surface of the oil storage tank is determined; and then based on the thermal radiation flux and distance of the flame surface, the target thermal radiation flux received by the target object is predicted. By adopting the technical solution provided by the present application, the user does not need to have professional knowledge such as three-dimensional modeling and meshing, and the operation process is simple, thereby achieving the prediction of the thermal radiation flux received by the target object while effectively improving the prediction efficiency of the thermal radiation flux received by the target object.

Description

Technical Field

[0001] The present application relates to the field of fire fighting technology, and in particular to a method, device and equipment for predicting the thermal radiation flux received by a target object. Background Art

[0002] In the large oil storage tank scenario, due to various reasons, such as leakage, spontaneous combustion or external ignition sources, the tank will usually burn open or flow, which is called pool fire. In the pool fire scenario, given the long burning time and fierce fire, the heat radiation flux on the flame surface of the large oil storage tank is large, which poses a high fire hazard to the surrounding targets. Therefore, it is crucial to predict the heat radiation flux received by the target to determine the fire hazard to the target.

[0003] At present, in pool fire combustion scenarios, the finite element numerical method is mainly used to simulate and predict the thermal radiation flux received by the target object. However, this method requires the user to have knowledge of three-dimensional modeling, meshing, etc., is highly professional, and the operation process is complicated, resulting in low prediction efficiency of the thermal radiation flux received by the target object. Summary of the invention

[0004] The present application provides a method, device and equipment for predicting the thermal radiation flux received by a target object, which can effectively improve the prediction efficiency of the thermal radiation flux received by the target object while predicting the thermal radiation flux received by the target object.

[0005] The present application provides a method for predicting the thermal radiation flux received by a target object, comprising: Acquire the area of ​​the oil storage tank and the distance between the location of the target object and the center of the flame of the oil storage tank; determining a heat radiation flux of a flame surface of the petroleum storage tank based on the area of ​​the petroleum storage tank and the distance; The target thermal radiation flux received by the target object is predicted based on the thermal radiation flux of the flame surface and the distance.

[0006] According to a method for predicting the thermal radiation flux received by a target object provided in the present application, the thermal radiation flux of the flame surface of the oil storage tank is determined based on the area and the distance of the oil storage tank, including: Determining the diameter of the oil storage tank based on the area of ​​the oil storage tank; Determine the flame length of the oil storage tank based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction; Based on the diameter of the petroleum storage tank and the flame length of the petroleum storage tank, the heat radiation flux of the flame surface of the petroleum storage tank is determined.

[0007] According to a method for predicting the thermal radiation flux received by a target object provided by the present application, the flame length of the oil storage tank is determined based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction, including: Based on the diameter of the oil storage tank, the distance and the angle, determining whether the target object is within the flame shadow of the oil storage tank; When it is determined that the target object is within the flame shadow of the petroleum storage tank, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank, the distance and the angle.

[0008] According to a method for predicting the thermal radiation flux received by a target object provided in the present application, the method further includes: In the case where it is determined that the target object is not within the flame shadow of the oil storage tank, determining whether the oil storage tank is in a windy environment; In the case where it is determined that the petroleum storage tank is in a windless environment, determining the flame length of the petroleum storage tank based on the diameter of the petroleum storage tank; In the case where it is determined that the petroleum storage tank is in a windy environment, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank and the wind speed in the windy environment.

[0009] According to a method for predicting the thermal radiation flux received by a target object provided by the present application, the method predicts the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance, including: Based on the angle between the flame tilt direction of the oil storage tank and the vertical direction, respectively determine the corresponding vertical direction viewing angle coefficient and horizontal direction viewing angle coefficient; Determine a corresponding viewing angle coefficient based on the vertical viewing angle coefficient and the horizontal viewing angle coefficient; The target thermal radiation flux received by the target object is predicted based on the thermal radiation flux of the flame surface, the viewing angle factor and the distance.

[0010] According to a method for predicting the thermal radiation flux received by a target object provided in the present application, the method further includes: Obtaining a safety critical value of the thermal radiation flux corresponding to the oil storage tank; The target thermal radiation flux is compared with the thermal radiation flux safety critical value, and based on the comparison result and the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value, the thermal radiation environment at the location of the target object is visualized.

[0011] The present application also provides a device for predicting the thermal radiation flux received by a target object, comprising: An acquisition unit, used for acquiring the area of ​​the oil storage tank and the distance between the position of the target object and the center of the flame of the oil storage tank; a processing unit, for determining a heat radiation flux of a flame surface of the petroleum storage tank based on the area of ​​the petroleum storage tank and the distance; The prediction unit is used to predict the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0012] The present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for predicting the thermal radiation flux received by a target object as described in any one of the above is implemented.

[0013] The present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for predicting the thermal radiation flux received by a target object as described in any one of the above is implemented.

[0014] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-described methods for predicting the thermal radiation flux received by a target object.

[0015] The method, device and equipment for predicting the thermal radiation flux received by the target object provided in the present application can first obtain the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank when predicting the target thermal radiation flux received by the target object; and determine the thermal radiation flux of the flame surface of the oil storage tank based on the area and distance of the oil storage tank; and then predict the target thermal radiation flux received by the target object based on the thermal radiation flux and distance of the flame surface. In this way, after determining the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank, the target thermal radiation flux received by the target object can be quickly predicted in combination with the distance between the position of the target object and the flame center of the oil storage tank. The user does not need to have professional knowledge such as three-dimensional modeling and meshing, and the operation process is simple, thereby achieving the prediction of the thermal radiation flux received by the target object while effectively improving the prediction efficiency of the thermal radiation flux received by the target object. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic flow chart of a method for predicting the thermal radiation flux received by a target object provided in an embodiment of the present application.

[0018] Figure 2 A schematic diagram of a process for determining the thermal radiation flux of the flame surface of a petroleum storage tank provided in an embodiment of the present application.

[0019] Figure 3 A schematic diagram of a process for predicting the target thermal radiation flux received by a target object is provided in an embodiment of the present application.

[0020] Figure 4 A schematic diagram of the visualization display of target thermal radiation flux received by a target object at different positions provided in an embodiment of the present application.

[0021] Figure 5 A schematic diagram of the structure of a device for predicting the thermal radiation flux received by a target object provided in an embodiment of the present application.

[0022] Figure 6 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the embodiments of the present application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of the present application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0025] The technical solution provided in the embodiment of the present application can be adapted to the pool fire burning scene of the oil storage tank. Taking the pool fire burning scene of the large oil storage tank scene as an example, the so-called large oil storage tank scene generally refers to the oil storage tank scene with a volume of 50,000 to 100,000 cubic meters. In view of the long burning time and fierce fire of the fire, the heat radiation flux on the flame surface of the large oil storage tank is large, which has a high fire hazard to the surrounding targets. Therefore, how to predict the heat radiation flux received by the target is crucial.

[0026] At present, in pool fire combustion scenarios, the finite element numerical method is mainly used to simulate and predict the thermal radiation flux received by the target object. However, this method requires the user to have knowledge of three-dimensional modeling, meshing, etc., is highly professional, and the operation process is complicated, resulting in low prediction efficiency of the thermal radiation flux received by the target object.

[0027] In order to effectively improve the prediction efficiency of the thermal radiation flux received by the target object while realizing the prediction of the thermal radiation flux received by the target object, an embodiment of the present application provides a method for predicting the thermal radiation flux received by the target object. The executor of the method can be an electronic device such as a computer or a server, or it can be a prediction device for the thermal radiation flux received by the target object set in the electronic device. The prediction device for the thermal radiation flux received by the target object can be implemented by software, hardware, or a combination of both.

[0028] The following specific embodiments will be used to describe in detail the method for predicting the thermal radiation flux received by the target provided by the present application. It is understandable that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0029] Figure 1 A schematic diagram of a method for predicting the thermal radiation flux received by a target object provided in an embodiment of the present application. For example, see Figure 1 As shown, the method for predicting the thermal radiation flux received by the target object may include: S101. Obtain the area of ​​the oil storage tank and the distance between the location of the target object and the center of the flame of the oil storage tank.

[0030] The flame center usually refers to the geometric center of the flame, which can be estimated by observing the shape and size of the flame, or can be determined using professional fire simulation software or based on experimental data. It can be set according to actual needs.

[0031] For example, when obtaining the area of ​​an oil storage tank, the size parameters of the oil storage tank, such as length, width and height, can be determined first, which can usually be obtained from the design drawings or technical parameters of the oil storage tank, and the area of ​​the oil storage tank can be determined based on the size parameters of the oil storage tank.

[0032] Taking a cylindrical oil storage tank as an example, the area of ​​the oil storage tank can be determined by calculating the bottom area (circular area) of the cylindrical oil storage tank; if the oil storage tank is a tank of other shapes, the geometric formula corresponding to other shapes can be used to determine the area of ​​the oil storage tank, which can be set according to actual needs.

[0033] For example, when obtaining the distance between the location of the target object and the flame center of the oil storage tank, the distance between the location of the target object and the flame center of the oil storage tank can be determined by using a measuring tool or by calculation.

[0034] After respectively obtaining the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank, the thermal radiation flux of the flame surface of the oil storage tank can be determined based on the area and distance of the oil storage tank, that is, the following S102 is executed: S102. Determine the thermal radiation flux of the flame surface of the oil storage tank based on the area and distance of the oil storage tank.

[0035] The heat radiation flux on the flame surface can be understood as the heat radiation flux emitted from the flame surface of the oil storage tank.

[0036] S103: predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0037] It can be seen that in the embodiment of the present application, when predicting the target thermal radiation flux received by the target object, the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank can be obtained first; and based on the area and distance of the oil storage tank, the thermal radiation flux of the flame surface of the oil storage tank is determined; and then based on the thermal radiation flux and distance of the flame surface, the target thermal radiation flux received by the target object is predicted. In this way, after the thermal radiation flux of the flame surface of the oil storage tank is determined based on the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank, the target thermal radiation flux received by the target object can be quickly predicted in combination with the distance between the position of the target object and the flame center of the oil storage tank. The user does not need to have professional knowledge such as three-dimensional modeling and meshing, and the operation process is simple, thereby achieving the prediction of the thermal radiation flux received by the target object while effectively improving the prediction efficiency of the thermal radiation flux received by the target object.

[0038] Based on the above Figure 1In the embodiment shown, for example, in the above S102, when the thermal radiation flux of the flame surface of the oil storage tank is determined based on the area and distance of the oil storage tank, its specific implementation can be referred to the following Figure 2 The embodiment shown.

[0039] Figure 2 A schematic diagram of a process for determining the thermal radiation flux of the flame surface of an oil storage tank provided in an embodiment of the present application, for example, see Figure 2 As shown, the method may include: S201. Determine the diameter of the oil storage tank based on the area of ​​the oil storage tank.

[0040] For example, in the embodiment of the present application, when determining the diameter of the oil storage tank based on the area of ​​the oil storage tank, the following formula 1 may be referred to.

[0041] Formula 1 in, Indicates the diameter of the oil storage tank, in meters. Represents the area of ​​the oil storage tank, the unit can be .

[0042] S202: Determine the flame length of the oil storage tank based on the diameter and distance of the oil storage tank and the angle between the inclination direction of the flame of the oil storage tank and the vertical direction.

[0043] Among them, the angle between the flame inclination direction of the oil storage tank and the vertical direction is also called the flame inclination angle.

[0044] For example, in an embodiment of the present application, when determining the flame length of an oil storage tank based on the diameter, distance and the angle between the inclination direction of the flame of the oil storage tank and the vertical direction, it is possible to first determine whether the target object is within the flame shadow of the oil storage tank based on the diameter, distance and angle of the oil storage tank; if it is determined that the target object is within the flame shadow of the oil storage tank, the flame length of the oil storage tank can be determined based on the diameter, distance and angle of the oil storage tank; on the contrary, if it is determined that the target object is not within the flame shadow of the oil storage tank, it is necessary to further determine whether the oil storage tank is in a windy environment, and determine the flame length of the oil storage tank based on the determination result.

[0045] For example, when determining the flame length of an oil tank, it is possible to first determine whether the target object is within the flame shadow of the oil tank based on the diameter, distance and angle of the oil tank. , it is determined that the target is within the flame shadow of the oil tank; if , the target is not within the flame shadow of the oil tank.

[0046] in, Indicates the distance between the target object and the flame center of the oil tank. It indicates the angle between the flame inclination direction of the oil storage tank and the vertical direction. It is positive when the target is downwind of the fire and negative when the target is upwind of the fire.

[0047] For example, when the target object is within the flame shadow of the oil storage tank, the flame length of the oil storage tank can be determined based on the diameter, distance and angle of the oil storage tank, as shown in the following formula 2.

[0048] Formula 2 in, Indicates the flame length of the oil storage tank, in meters.

[0049] When the target object is not within the flame shadow of the oil storage tank, it is necessary to further determine whether the oil storage tank is in a windy environment, and determine the flame length of the oil storage tank based on the determination result.

[0050] For example, when determining the flame length of the oil storage tank according to the judgment result, if the judgment result indicates that the oil storage tank is in a windless environment, that is, =0, the flame length of the oil storage tank can be determined based on the diameter of the oil storage tank, as shown in the following formula 3.

[0051] Formula 3 in, It indicates the burning rate of crude oil per unit area, in units of 0.033kg / (m 2 s), Indicates the surrounding air density in kg / m 3 , g represents the acceleration due to gravity, the unit is 9.8m / s 2 .

[0052] If the judgment result indicates that the oil storage tank is in a windy environment, >0, the flame length of the oil storage tank can be determined based on the diameter of the oil storage tank and the wind speed in a windy environment. For details, please refer to the following formula 4.

[0053] Formula 4 in, represents the dimensionless wind speed in m / s. , Indicates the wind speed in a windy environment. If the value of is greater than or equal to 1, it is calculated according to the actual value; if If the value is less than 1, it is calculated as 1.

[0054] After the flame length of the oil storage tank is determined through the above S202, the following S203 can be executed.

[0055] S203. Determine the thermal radiation flux of the flame surface of the oil storage tank based on the diameter of the oil storage tank and the flame length of the oil storage tank.

[0056] For example, in the embodiment of the present application, when determining the thermal radiation flux of the flame surface of the oil storage tank based on the diameter of the oil storage tank and the flame length of the oil storage tank, please refer to the following formula 5 for details.

[0057] Formula 5 Where E represents the thermal radiation flux on the flame surface of the oil tank, Indicates the combustion efficiency factor, usually taken as 0.3, Indicates the heat of combustion, the unit is 4.1×10 4 kJ / kg, Indicates the flame length of a petroleum storage tank.

[0058] In combination with the above description, the diameter of the oil storage tank can be determined based on the area of ​​the oil storage tank; and the flame length of the oil storage tank can be determined based on the diameter, distance and the angle between the inclination direction of the flame of the oil storage tank and the vertical direction; and the thermal radiation flux of the flame surface of the oil storage tank can be determined based on the diameter of the oil storage tank and the flame length of the oil storage tank. In this way, the thermal radiation flux of the flame surface of the oil storage tank can be quickly determined, so that the target thermal radiation flux received by the target object can be jointly predicted based on the determined thermal radiation flux of the flame surface of the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank.

[0059] Based on any of the above embodiments, for example, in the above S103, based on the thermal radiation flux and distance of the flame surface, when predicting the target thermal radiation flux received by the target object, its specific implementation can be referred to as follows: Figure 3 The embodiment shown.

[0060] Figure 3 A schematic diagram of a process for predicting the target thermal radiation flux received by a target object provided in an embodiment of the present application, for example, see Figure 3 As shown, the method may include: S301. Based on the angle between the flame tilt direction of the oil storage tank and the vertical direction, respectively determine the corresponding vertical direction viewing angle coefficient and the horizontal direction viewing angle coefficient.

[0061] For example, assuming that the vertical viewing angle coefficient can be expressed as , the horizontal viewing angle coefficient can be expressed as .

[0062] For example, in the embodiment of the present application, when determining the corresponding vertical viewing angle coefficient based on the angle between the flame inclination direction of the oil storage tank and the vertical direction, the following formula 6 can be referred to.

[0063] Formula 6 For example, in the embodiment of the present application, when determining the corresponding vertical viewing angle coefficient based on the angle between the flame inclination direction of the oil storage tank and the vertical direction, the following formula 7 can be referred to.

[0064] Formula 7 In the above formula 6 and formula 7, , , , , , , , , .

[0065] After respectively determining the corresponding vertical direction viewing angle and horizontal direction viewing angle based on the angle between the flame tilt direction of the oil storage tank and the vertical direction, the following S302 may be executed.

[0066] S302: Determine a corresponding viewing angle coefficient based on a vertical viewing angle coefficient and a horizontal viewing angle coefficient.

[0067] For example, based on the vertical viewing angle coefficient and the horizontal viewing angle coefficient, when determining the corresponding viewing angle coefficient, please refer to the following formula 8 for details.

[0068] Formula 8 in, Represents the view factor.

[0069] S303: predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface, the viewing angle factor and the distance.

[0070] For example, in the embodiment of the present application, when predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface, the viewing angle coefficient and the distance, please refer to the following formula 9 for details.

[0071] Formula 9 in, Indicates the target thermal radiation flux received by the target, in kW / m 2 , represents the atmospheric projection coefficient, , Indicates the distance between the target object and the center of the flame of the oil tank.

[0072] It can be seen that in the embodiment of the present application, the corresponding vertical viewing angle and horizontal viewing angle are determined based on the angle between the flame inclination direction of the oil storage tank and the vertical direction, respectively; and the corresponding viewing angle is determined based on the vertical viewing angle and the horizontal viewing angle; in this way, the target thermal radiation flux received by the target object can be quickly predicted based on the thermal radiation flux on the flame surface, combined with the viewing angle and the distance, without the need for the user to have professional knowledge such as three-dimensional modeling and meshing, and the operation process is simple, thereby achieving the prediction of the thermal radiation flux received by the target object while effectively improving the prediction efficiency of the thermal radiation flux received by the target object.

[0073] In addition, it should be noted that in the embodiment of the present application, in order to quickly predict the prediction efficiency of the thermal radiation flux received by the target object, the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank and other parameters can be obtained according to the fire environment of the oil storage tank by Matlab programming, and input into the Matlab program interface to predict the prediction efficiency of the thermal radiation flux received by the target object. The main Matlab programming code can be as follows: % Calculate dimensionless wind speed = / ( * / )^(1 / 3); if <1 = 1; end % Calculate flame length if ; if if =0 =42 * D * ( / / (g * D)^0.5)^0.61; else = 55 * D * ( / / (g * D)^0.5)^0.67 * ( )^(-0.21); end % Calculate the heat radiation flux on the flame surface E E = * D^2 * * * / ( * D^2 + 4 * * D * ); % Calculate flame inclination if <= 1 = 1; else if >1 = 1 / ^0.5; % Calculate the viewing angle factor b = 2 * L / D; H = sqrt(b^2 - 1); a = 2 * / D; A = sqrt(a^2 + (b + 1)^2 - 2 * a * (b + 1) * sin ); B = sqrt(a^2 + (b - 1)^2 - 2 * a * (b - 1) * sin ); C = sqrt(1 + (b^2 - 1) * ); F = a * / (b - a * sin ); G = sqrt((b - 1) / (b + 1)); ; Fmax = sqrt(Fv^2 + F H ^2); % Calculate the target thermal radiation flux received by the target Based on any of the above embodiments, in order to intuitively view the thermal radiation environment where the target object is located, after predicting the target thermal radiation flux received by the target object, the thermal radiation environment where the target object is located can also be visualized.

[0074] The visual display content may be a thermal radiation flux-spatial distance diagram.

[0075] For example, when visually displaying the thermal radiation environment at the target object's location, the thermal radiation flux safety critical value corresponding to the oil storage tank can be obtained; the target thermal radiation flux is compared with the thermal radiation flux safety critical value, and based on the comparison result and the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value, the thermal radiation environment at the target object's location is visualized. In this way, the thermal radiation environment at the target object's location can be intuitively viewed based on the visualized display content.

[0076] If the comparison result indicates that the target thermal radiation flux is less than the thermal radiation flux safety critical value, then the position of the target object is located outside the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value when the visual display is displayed, and the thermal radiation environment at the target object is safe; if the comparison result indicates that the target thermal radiation flux is greater than the thermal radiation flux safety critical value, then the position of the target object is located within the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value when the visual display is displayed, and the thermal radiation environment at the target object is dangerous.

[0077] Generally speaking, according to the thermal radiation injury criteria, the safe critical value of thermal radiation flux for long-term exposure without discomfort is 1.6kW / m 2 , thermal radiation flux safety critical value 1.6kW / m 2 The corresponding distance is the thermal radiation safety distance, which can be used as a fire fighting and rescue safety distance; the thermal radiation flux safety critical value of steel structure deformation is 25kW / m 2 , thermal radiation flux safety critical value 25kW / m 2 The corresponding distance is the safe distance for property damage.

[0078] Firefighters wear combat uniforms when extinguishing fires. When the heat radiation flux in the combat uniforms is 1.6kW / m 2 When the target heat radiation flux received by the combat suit is 12.029kW / m 2 The thermal radiation environment of the location of the relevant target object can be seen in the following Table 1.

[0079] Table 1

[0080] Take a fire in a 100,000 cubic meter crude oil storage tank as an example. Assuming the diameter of the crude oil storage tank is D = 80m, the wind speed in the environment where the crude oil storage tank is located is =3m / s, the target thermal radiation flux received by the target at different positions can be calculated by Matlab program. Figure 4 As shown, Figure 4 A schematic diagram of the visualization display of target thermal radiation flux received by a target object at different positions provided in an embodiment of the present application.

[0081] in, Figure 4 The x-axis in the figure represents the distance between the target and the flame center of the crude oil tank. When the target's coordinate x>0, it means that the target is located upwind of the oil tank; when the target's coordinate x<0, it means that the target is located downwind of the oil tank. Figure 4 The absolute value of the y-axis in represents the target thermal radiation flux received by the target object; Figure 4 The red line in the figure indicates: According to the thermal radiation injury criteria, kW / m 2 Indicates the safe distance of the building; kW / m 2 Indicates the safe distance for personnel in fire fighting uniforms; kW / m 2 Indicates the safe distance for personnel who are not wearing protective clothing. When the target thermal radiation flux received by the target is less than the corresponding thermal radiation flux safety critical value, the target is outside the red mark line corresponding to the thermal radiation flux safety critical value, and the thermal radiation environment at the location of the target is safe, that is, as the distance between the target and the flame center of the crude oil storage tank increases, the target will be located outside the red mark line corresponding to the thermal radiation flux safety critical value. As the temperature increases gradually, the target thermal radiation flux received by the target object gradually decreases, and the thermal radiation environment at its location is safe.

[0082] It can be seen that in the embodiment of the present application, by comparing the target thermal radiation flux with the thermal radiation flux safety critical value, and based on the comparison result and the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value, the thermal radiation flux-spatial distance diagram of the target object's location is visualized, so that relevant personnel can intuitively view the thermal radiation environment of the target object's location, which can provide a reference for rapid decision-making on personnel evacuation and fire rescue in a large oil storage tank fire environment. In this way, even for personnel who do not have relevant professional knowledge, they can quickly obtain real-time changes in the fire scene based on the displayed thermal radiation flux-spatial distance diagram, providing a decision-making basis for rescue operations.

[0083] The following is a description of the thermal radiation flux prediction device for a target object provided in the present application. The thermal radiation flux prediction device for a target object described below and the thermal radiation flux prediction method for a target object described above can be referenced to each other.

[0084] Figure 5 A schematic diagram of a device for predicting the thermal radiation flux received by a target object provided in an embodiment of the present application. For example, see Figure 5 As shown, the thermal radiation flux prediction device 50 received by the target may include: An acquisition unit 501 is used to acquire the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank; A processing unit 502 is used to determine the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance; The prediction unit 503 is used to predict the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0085] For example, in the embodiment of the present application, the processing unit 502 is used to determine the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance, including: Determining the diameter of the oil storage tank based on the area of ​​the oil storage tank; Determine the flame length of the oil storage tank based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction; Based on the diameter of the petroleum storage tank and the flame length of the petroleum storage tank, the heat radiation flux of the flame surface of the petroleum storage tank is determined.

[0086] For example, in the embodiment of the present application, the processing unit 502 is used to determine the flame length of the oil storage tank based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction, including: Based on the diameter of the oil storage tank, the distance and the angle, determining whether the target object is within the flame shadow of the oil storage tank; When it is determined that the target object is within the flame shadow of the petroleum storage tank, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank, the distance and the angle.

[0087] For example, in the embodiment of the present application, the processing unit 502 is further configured to: In the case where it is determined that the target object is not within the flame shadow of the oil storage tank, determining whether the oil storage tank is in a windy environment; In the case where it is determined that the petroleum storage tank is in a windless environment, determining the flame length of the petroleum storage tank based on the diameter of the petroleum storage tank; In the case where it is determined that the petroleum storage tank is in a windy environment, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank and the wind speed in the windy environment.

[0088] For example, in the embodiment of the present application, the prediction unit 503 is used to predict the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance, including: Based on the angle between the flame tilt direction of the oil storage tank and the vertical direction, respectively determine the corresponding vertical direction viewing angle coefficient and horizontal direction viewing angle coefficient; Determine a corresponding viewing angle coefficient based on the vertical viewing angle coefficient and the horizontal viewing angle coefficient; The target thermal radiation flux received by the target object is predicted based on the thermal radiation flux of the flame surface, the viewing angle factor and the distance.

[0089] For example, in the embodiment of the present application, the device 50 for predicting the thermal radiation flux received by the target object further includes a display unit; The acquisition unit 501 is also used to acquire the thermal radiation flux safety critical value corresponding to the oil storage tank; The display unit is used to compare the target thermal radiation flux with the thermal radiation flux safety critical value, and based on the comparison result and the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value, visualize the thermal radiation environment at the location of the target object.

[0090] The thermal radiation flux prediction device 50 received by the target object provided in the embodiment of the present application can execute the technical solution of the thermal radiation flux prediction method received by the target object in any of the above-mentioned embodiments, and its implementation principle and beneficial effects are similar to the implementation principle and beneficial effects of the thermal radiation flux prediction method received by the target object. Please refer to the implementation principle and beneficial effects of the thermal radiation flux prediction method received by the target object, which will not be repeated here.

[0091] Figure 6 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present application, such as Figure 6As shown, the electronic device may include: a processor 610, a communications interface 620, a memory 630 and a communications bus 640, wherein the processor 610, the communications interface 620 and the memory 630 communicate with each other through the communications bus 640. The processor 610 may call the logic instructions in the memory 630 to execute a method for predicting the thermal radiation flux received by a target object, the method comprising: obtaining the area of ​​an oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank; determining the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance; predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0092] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0093] On the other hand, the present application also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the thermal radiation flux prediction method received by the target object provided by the above-mentioned methods. The method includes: obtaining the area of ​​the oil storage tank and the distance between the position of the target object and the flame center of the oil storage tank; determining the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance; and predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0094] On the other hand, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the thermal radiation flux prediction method received by the target object provided by the above-mentioned methods, the method comprising: obtaining the area of ​​the oil storage tank, and the distance between the position of the target object and the flame center of the oil storage tank; determining the thermal radiation flux of the flame surface of the oil storage tank based on the area of ​​the oil storage tank and the distance; and predicting the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

[0095] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0096] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for predicting the thermal radiation flux received by a target object, characterized in that: include: Acquire the area of ​​the oil storage tank and the distance between the location of the target object and the center of the flame of the oil storage tank; determining a heat radiation flux of a flame surface of the petroleum storage tank based on the area of ​​the petroleum storage tank and the distance; The target thermal radiation flux received by the target object is predicted based on the thermal radiation flux of the flame surface and the distance.

2. The method for predicting the thermal radiation flux received by a target object according to claim 1, characterized in that: The step of determining the thermal radiation flux of the flame surface of the petroleum storage tank based on the area of ​​the petroleum storage tank and the distance comprises: Determining the diameter of the oil storage tank based on the area of ​​the oil storage tank; Determine the flame length of the oil storage tank based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction; Based on the diameter of the petroleum storage tank and the flame length of the petroleum storage tank, the heat radiation flux of the flame surface of the petroleum storage tank is determined.

3. The method for predicting the thermal radiation flux received by a target object according to claim 2, characterized in that: The determining of the flame length of the oil storage tank based on the diameter of the oil storage tank, the distance, and the angle between the flame inclination direction of the oil storage tank and the vertical direction comprises: Based on the diameter of the oil storage tank, the distance and the angle, determining whether the target object is within the flame shadow of the oil storage tank; When it is determined that the target object is within the flame shadow of the petroleum storage tank, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank, the distance and the angle.

4. The method for predicting the thermal radiation flux received by a target object according to claim 3, characterized in that: The method further comprises: In the case where it is determined that the target object is not within the flame shadow of the oil storage tank, determining whether the oil storage tank is in a windy environment; In the case where it is determined that the petroleum storage tank is in a windless environment, determining the flame length of the petroleum storage tank based on the diameter of the petroleum storage tank; In the case where it is determined that the petroleum storage tank is in a windy environment, the flame length of the petroleum storage tank is determined based on the diameter of the petroleum storage tank and the wind speed in the windy environment.

5. The method for predicting the thermal radiation flux received by a target object according to any one of claims 1 to 4, characterized in that: The predicting, based on the thermal radiation flux of the flame surface and the distance, the target thermal radiation flux received by the target object comprises: Based on the angle between the flame tilt direction of the oil storage tank and the vertical direction, respectively determine the corresponding vertical direction viewing angle coefficient and horizontal direction viewing angle coefficient; Determine a corresponding viewing angle coefficient based on the vertical viewing angle coefficient and the horizontal viewing angle coefficient; The target thermal radiation flux received by the target object is predicted based on the thermal radiation flux of the flame surface, the viewing angle factor and the distance.

6. The method for predicting the thermal radiation flux received by a target object according to any one of claims 1 to 4, characterized in that: The method further comprises: Obtaining a safety critical value of the thermal radiation flux corresponding to the oil storage tank; The target thermal radiation flux is compared with the thermal radiation flux safety critical value, and based on the comparison result and the thermal radiation safety distance corresponding to the thermal radiation flux safety critical value, the thermal radiation environment at the location of the target object is visualized.

7. A device for predicting the thermal radiation flux received by a target object, characterized in that: include: An acquisition unit, used for acquiring the area of ​​the oil storage tank and the distance between the position of the target object and the center of the flame of the oil storage tank; a processing unit, for determining a heat radiation flux of a flame surface of the petroleum storage tank based on the area of ​​the petroleum storage tank and the distance; The prediction unit is used to predict the target thermal radiation flux received by the target object based on the thermal radiation flux of the flame surface and the distance.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for predicting the thermal radiation flux received by the target object as described in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for predicting the thermal radiation flux received by a target object as described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for predicting the thermal radiation flux received by a target object as described in any one of claims 1 to 6 is implemented.

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