CN111611723A - Method, device and medium for generating leakage diffusion data of urban building group conveying pipeline - Google Patents

Method, device and medium for generating leakage diffusion data of urban building group conveying pipeline Download PDF

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CN111611723A
CN111611723A CN202010506297.4A CN202010506297A CN111611723A CN 111611723 A CN111611723 A CN 111611723A CN 202010506297 A CN202010506297 A CN 202010506297A CN 111611723 A CN111611723 A CN 111611723A
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田中山
刘胜
赖少川
谢成
姜红涛
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China Petroleum and Chemical Corp
China Oil and Gas Pipeline Network Corp
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Sinopec Sales Co Ltd South China Branch
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Abstract

The application discloses a method and a device for generating leakage diffusion data of a transport pipeline of an urban building group and a computer readable storage medium. The method comprises the steps of constructing a three-dimensional diffusion area model based on an urban building layout of a building area where a conveying pipeline with leakage holes is located, and carrying out grid division processing on the three-dimensional diffusion area model; calculating the leakage amount and the flow speed information of the leaked substances according to the pressure intensity in the conveying pipeline, the position of the pipeline where the liquid level of the leaked substances is located and the density of the leaked substances; and setting calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction, and automatically generating leakage diffusion data of the leaked substances in the construction diffusion area by using the leakage diffusion multiphase flow three-dimensional model based on the three-dimensional diffusion area model, the leakage amount and the flow speed information, so that accurate analysis is realized, and the diffusion migration data of the oil pollutants leaked from the conveying pipeline in the urban building dense area on the urban ground surface or the building surface is obtained.

Description

Method, device and medium for generating leakage diffusion data of urban building group conveying pipeline
Technical Field
The present application relates to the field of fluid transportation technologies, and in particular, to a method and an apparatus for generating leakage diffusion data of a transportation pipeline of an urban building group, and a computer-readable storage medium.
Background
The pipeline transportation has the unique advantages of low one-time investment, low transportation cost, high safety, environmental protection and the like, and is particularly suitable for long-distance transportation of inflammable and explosive petroleum and natural gas. The finished oil pipeline is used as a ring of an oil product conveying pipeline close to a consumption terminal and plays a role of a city blood vessel in a city pipe network structure. Not to be neglected, petroleum and petroleum products have potential risks in the storage and transportation process, once the oil leaks in a large area, the oil rapidly disperses, and if the oil cannot be effectively treated in a short time, huge life and property safety losses can be caused. Therefore, the safety of the finished oil pipeline is concerned with the life and property safety of urban residents.
If the initial leakage process of the ground pipeline can be well researched, the fire fighting work can be timely and reasonably carried out, the range of crude oil scattering is controlled, the frequency of accidents and the degree of property loss are reduced, the safety of crude oil leakage is kept within an acceptable risk range, and the method has important significance for preventing and controlling the accidents.
For the mechanism of pipeline leakage and diffusion, many studies have been made by domestic and foreign personnel. In this field of research, the pipe leakage diffusion can be classified into gas leakage diffusion and liquid leakage diffusion according to the leakage medium. And the leakage environment can be divided into overhead pipeline leakage and buried pipeline leakage. The theoretical modeling analysis of the leak diffusion is theoretically performed by a scholart, such as a gaussian model of gas, a Sutton model, a BM model, and the like. And a plurality of scholars perform numerical simulation analysis to obtain leakage diffusion data according to different application scenes, such as an oil depot, a sea bottom and a mountain land.
However, the above-mentioned prior methods for the diffusion of leakage from a buried pipeline on a flat ground or the diffusion of local leakage from a pipeline have difficulty in accurately describing the process of diffusion and migration of crude oil on the surface of a building area or the surface of a building.
In view of this, how to accurately analyze and obtain the data of the diffusion and migration of the oil contaminants leaked from the transportation pipelines in the dense areas of the urban buildings on the urban ground surface or the building surface is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The application provides a method and a device for generating urban building group conveying pipeline leakage diffusion data and a computer readable storage medium, which realize accurate analysis and obtain the diffusion migration data of the conveying pipeline leakage oil pollutants in the dense area of the urban building on the urban ground surface or the building surface.
In order to solve the above technical problems, embodiments of the present invention provide the following technical solutions:
the embodiment of the invention provides a method for generating leakage diffusion data of a transport pipeline of an urban building group, which comprises the following steps:
constructing a three-dimensional diffusion area model based on an urban building layout of a building area where a conveying pipeline with leakage holes is located, and performing grid division on the three-dimensional diffusion area model;
calculating the leakage amount and the flow speed information of the leakage object according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage object is located and the density of the leakage object;
automatically filling calculation parameters of a leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction so that the leakage diffusion multiphase flow three-dimensional model automatically generates leakage diffusion data of the leakage object in a building diffusion area based on the three-dimensional diffusion area model, the leakage amount and the flow speed information;
the calculation parameters comprise a solver type, operating environment configuration information, physical properties of the two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions.
Optionally, the calculating the leakage amount and the flow rate information of the leakage object according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage object is located, and the density of the leakage object includes:
calculating the leakage amount and the flow speed information of the leakage object by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation;
the leakage amount is calculated by the formula
Figure BDA0002526668640000021
The fluid velocity is calculated by the relation
Figure BDA0002526668640000022
Wherein Q is the leakage amount, u is the flow rate information, PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0Is the leakage coefficient of the liquid; a is the sectional area of the break of the conveying pipeline, and the unit is m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。。
Optionally, the step of automatically filling the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction includes:
automatically setting a Fluent solver of the leakage diffusion multiphase flow three-dimensional model into a pressure-based solver according to the received parameter setting instruction;
automatically setting the operating environment configuration information of the leakage diffusion multiphase flow three-dimensional model to be in a gravity direction of-Z, a gravity acceleration of 9.8m/s2 and an operating environment pressure of one atmosphere according to the received parameter setting instruction;
automatically setting the turbulence model of the leakage diffusion multiphase flow three-dimensional model to be a standard k-model according to the received parameter setting instruction;
automatically setting the calculation method of the leakage diffusion multiphase flow three-dimensional model into a PISO algorithm according to the received parameter setting instruction;
automatically setting the initial condition and the boundary condition of the leakage diffusion multiphase flow three-dimensional model to be 0% of the concentration of the oil phase before the pipeline is not leaked according to the received parameter setting instruction; defining the surface and the ground surface of a building as walls, and taking 200mm small leakage holes as speed inlets and the size of the small leakage holes as 5 m/s; 5 surfaces of the surface of the calculation area except the surface of the earth are all set as pressure outlets, and the gauge pressure is 0.
Optionally, after the step of automatically filling the calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction, the method further includes:
acquiring oil phase cloud charts of the leakage diffusion multi-phase flow three-dimensional model at different output moments;
and defining oil phase cloud charts at different moments as corresponding time frames to obtain the regional range and leakage speed of the leakage object leaking along with time.
Optionally, after the positioning the oil phase cloud maps at different time instants as corresponding time frames to obtain the region range and the leakage speed of the leakage object leaking along with time, the method further includes:
and visually displaying the leakage process of the leakage according to the area range and the leakage speed of the leakage along with the time so as to dynamically show the whole process that the leakage of the leakage is sprayed to the air from the small hole and then falls to the ground and spreads on the ground surface.
In another aspect, an embodiment of the present invention provides a device for generating leakage diffusion data of a transportation pipeline of an urban building group, including:
the diffusion area model building module is used for building a three-dimensional diffusion area model based on an urban building layout of a building area where a conveying pipeline with leakage holes is located and carrying out grid division processing on the three-dimensional diffusion area model;
the leakage information calculation module is used for calculating the leakage amount and the flow speed information of the leakage object according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage object is located and the density of the leakage object;
the leakage diffusion data generation module is used for automatically filling calculation parameters of a leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction so as to enable the leakage diffusion multiphase flow three-dimensional model to automatically generate leakage diffusion data of the leakage object in a building diffusion area based on the three-dimensional diffusion area model, the leakage amount and the flow speed information;
the calculation parameters comprise a solver type, operating environment configuration information, physical properties of the two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions.
Optionally, the leakage information calculating module is specifically configured to:
calculating the leakage amount and the flow speed information of the leakage object by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation;
the leakage amount is calculated by the formula
Figure BDA0002526668640000041
The fluid velocity is calculated by the relation
Figure BDA0002526668640000042
Wherein Q is the leakage amount, u is the flow rate information, PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0Is the leakage coefficient of the liquid; a is the sectional area of the break of the conveying pipeline, and the unit is m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。
Optionally, the method further includes:
and the leakage detail data calculation module is used for defining oil phase cloud pictures at different moments acquired from the leakage diffusion multiphase flow three-dimensional model as corresponding time frames so as to obtain the leakage area range and the leakage speed of the leakage object along with time.
The embodiment of the invention also provides a device for generating the leakage diffusion data of the urban building group conveying pipeline, which comprises a processor, wherein the processor is used for realizing the steps of the method for generating the leakage diffusion data of the urban building group conveying pipeline when executing the computer program stored in the memory.
Finally, an embodiment of the present invention provides a computer-readable storage medium, where an urban building group transportation pipeline leakage diffusion data generation program is stored on the computer-readable storage medium, and when executed by a processor, the urban building group transportation pipeline leakage diffusion data generation program implements the steps of the urban building group transportation pipeline leakage diffusion data generation method according to any one of the foregoing embodiments.
The technical scheme provided by the application has the advantages that based on a finite volume method and combined with computational fluid analysis software, the established three-dimensional model of the multi-phase flow for the leakage and diffusion of the building area is used for simulating the process of diffusion and migration of the oil pollutants leaked from the pipeline on the urban ground surface or the building surface to automatically generate the leakage and diffusion data of the leaked oil pollutants in the building diffusion area, so that the problem that the diffusion and migration process of the transported liquid on the building area ground surface or the building surface cannot be accurately described in the related art for the leakage and diffusion of the buried pipeline on the flat ground or the local leakage and diffusion of the pipeline is solved, and the accurate analysis is realized to obtain the diffusion and migration data of the oil pollutants leaked from the transported pipeline in the dense area of the urban building on the urban.
In addition, the embodiment of the invention also provides a corresponding implementation device and a computer readable storage medium for the method for generating the leakage diffusion data of the urban building group conveying pipeline, so that the method has higher practicability, and the device and the computer readable storage medium have corresponding advantages.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for generating leakage diffusion data of a transportation pipeline of an urban building group according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional building area model of an exemplary application scenario from a southeast perspective according to an embodiment of the present invention;
FIG. 3 is a computational domain meshing diagram of the exemplary application scenario of FIG. 2 provided by an embodiment of the present invention;
fig. 4 is a schematic flow chart of another method for generating leakage diffusion data of a transportation pipeline of an urban building group according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a leakage diffusion range visualization when the leakage velocity is 5m/s according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a visualization of a leakage diffusion range when the leakage velocity is 20m/s according to an embodiment of the present invention;
fig. 7 is a structural diagram of a specific implementation of a leakage diffusion data generation apparatus for a transportation pipeline of an urban building group according to an embodiment of the present invention;
fig. 8 is a structural diagram of another specific implementation of the urban building group conveying pipeline leakage diffusion data generation device according to the embodiment of the present invention;
fig. 9 is a structural diagram of another specific implementation of the urban building group transportation pipeline leakage diffusion data generation device according to the embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may include other steps or elements not expressly listed.
Having described the technical solutions of the embodiments of the present invention, various non-limiting embodiments of the present application are described in detail below.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for generating leakage diffusion data of a transportation pipeline of an urban building group according to an embodiment of the present invention, where the embodiment of the present invention may include the following:
s101: and constructing a three-dimensional diffusion area model based on the urban building layout of the building area where the conveying pipeline with the leakage hole is located, and carrying out grid division processing on the three-dimensional diffusion area model.
The method is suitable for the problem of leakage of fluids such as crude oil in the conveying pipeline of the dense area of the urban building, the surface condition is cement concrete, and meanwhile, the diffusion behavior of the oil on the surface can be considered to be only surface flow caused by the difference of the surface topography conditions by neglecting the influence of volatilization. In order to calculate and obtain diffusion data of a conveying pipeline in a building area, a three-dimensional model of the building area where the conveying pipeline with a leakage port is located is required to be constructed, before the three-dimensional model is constructed, an urban building layout plan can be obtained, building parameters of the building area are obtained from the urban building layout plan, then a target diffusion area is determined in the building area based on diffusion duration, and the longer the diffusion duration is, the larger the target diffusion area range which is diffused around the leakage port is correspondingly. After the target diffusion area is determined, the building parameters of the target diffusion area are obtained, and any three-dimensional modeling software such as Solideworks or an algorithm is adopted to carry out a three-dimensional diffusion area model. As shown in fig. 2, a three-dimensional diffusion area model of a building layout composed of three buildings, including west, low and east buildings, is constructed, the building parameters are the height of a single building and the distance value between adjacent buildings, according to the GB50253-2014 oil pipeline engineering design specification, the distance between crude oil and finished oil pipelines and important public buildings of town residential points is not less than 5m, so that the distance between a leakage point and the buildings on both sides is more than 10m, and 10m can be selected as shown in fig. 2. In the stage of leakage formation, the area of a leakage opening is continuously increased due to internal and external pressure; in the stable leakage stage, the leakage area is unchanged, and the leakage flow tends to be stable; after the emergency response time is reached, the pressure is reduced by closing the valve and stopping the pump, so that the leakage is attenuated continuously. The present application does not consider the stage of leak formation, assuming the leak port is stable. The leakage diffusion behavior at constant speed is calculated in the early stage, and the leakage attenuation is considered in the later stage.
Because the general building area does not contain complex curved surface shapes, structured grids can be adopted to carry out grid division on the three-dimensional diffusion area model, so that each grid unit is obtained, and a corresponding calculation domain is determined. The meshing may be performed, for example, using Ansys ICEM software, as shown in fig. 3. The mesh generation step includes block division, mapping between blocks and entity elements, and determining the number of nodes, and those skilled in the art determine the number of computing nodes based on the size of the target diffusion region, which is not limited in this application. The principle and implementation process of mesh division can refer to the process recorded in the related art, and are not described herein again.
S102: and calculating the leakage amount and the flow speed information of the leaked substances according to the pressure intensity in the conveying pipeline, the position of the pipeline where the liquid level of the leaked substances is located and the density of the leaked substances.
It is understood that the diffusion of a leak, such as crude oil, is an unsteady process, and the diffusion motion of the leak, such as crude oil, in the calculation region satisfies three conservation laws, namely conservation of mass, conservation of momentum, and conservation of energy. Accordingly, the leakage amount and the flow speed information of the leakage can be calculated by establishing a corresponding continuity equation, a momentum equation and an energy equation.
Wherein, the continuity equation corresponding to the diffusion motion process of the leakage object can be expressed as:
Figure BDA0002526668640000081
in the formula ux、uy、uzVelocity components in the x, y, z directions, respectively, m/s; u is a velocity vector, m/s; t is time, s; rho is density, kg/m3。
The differential expressions of the momentum conservation equation corresponding to the diffusion motion process of the leakage on x, y and z are respectively as follows:
Figure BDA0002526668640000082
Figure BDA0002526668640000083
Figure BDA0002526668640000091
in the formula (f)x、fy、fzIs the unit mass force in the x, y, z directions, m/s2(ii) a τ is the viscous stress, Pa; p is the pressure on the fluid element, Pa.
The energy conservation equation corresponding to the diffusion motion process of the leakage can be expressed as:
Figure BDA0002526668640000092
wherein E is Total energy, J/kg; h isfIs the enthalpy of component J, J/kg; j. the design is a squarejIs the diffusion flux of component j; k is a radical ofeffW/(m.K) is an effective thermal conductivity. The calculation formula is as follows:
Figure BDA0002526668640000093
Figure BDA0002526668640000094
Tref＝298.15K；
keff＝k+kt。
the method takes the circular small hole with the diameter less than one tenth of the pipe diameter as an example of the leakage position of the pipeline, takes a certain section of fluid in the pipeline as a research object, and can calculate the leakage amount of the liquid and the liquid velocity equation by the energy conservation of an opening system. Optionally, the leakage amount and flow rate information of the leakage object can be calculated by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation.
The leakage calculation relation can be expressed as
Figure BDA0002526668640000095
The fluid velocity calculation relationship may be expressed as
Figure BDA0002526668640000096
Wherein Q is leakage, u is flow rate information, and PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0The leakage coefficient of the liquid can be 0.6; a is the sectional area of the break of the conveying pipeline, and the unit is m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。
S103: and automatically filling calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction so that the leakage diffusion multiphase flow three-dimensional model automatically generates leakage diffusion data of the leakage object in the building diffusion area based on the three-dimensional diffusion area model, the leakage amount and the flow speed information.
Because the crude oil leakage diffusion is an unsteady state process, in order to realize the capture of an oil-gas phase interface, a VOF model can be adopted to carry out numerical solution based on Fluent software, namely the leakage diffusion multiphase flow three-dimensional model in the step S103 is a VOF model based on Fluent software. In order to improve the calculation efficiency and the automation degree of the whole calculation process, the calculation parameters of the leakage diffusion multiphase flow three-dimensional model can be automatically filled directly according to the received parameter setting instruction, and the calculation parameters can comprise the type of a solver, the configuration information of the operating environment, the physical properties of a two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions. The parameter setting instruction comprises corresponding information of the calculation parameters, the calculation parameter information in the parameter setting instruction can be manually input, and can also be directly input through a usb interface or a nfc or other close-range data transmission mode, and the realization of the application is not influenced. After the configuration of the calculation parameters of the leakage diffusion multiphase flow three-dimensional model is completed, the leakage diffusion multiphase flow three-dimensional model simulates the diffusion process of a leakage object in a target diffusion area, and the simulation result is used as leakage diffusion data to be automatically generated and output.
In the technical scheme provided by the embodiment of the invention, based on a finite volume method and combined with computational fluid analysis software, the established three-dimensional model of the multi-phase flow for simulating the diffusion and migration process of the oil leakage pollutants of the pipeline leakage in the urban ground surface or the building surface is used for automatically generating the leakage diffusion data of the leakage in the building diffusion area, so that the problem that the diffusion and migration process of the liquid delivery on the building area ground surface or the building surface cannot be accurately described for the leakage diffusion of the pipeline buried in the ground or the local leakage diffusion of the pipeline in the related technology is solved, the accurate analysis is realized, and the diffusion and migration data of the oil leakage pollutants of the pipeline leakage in the urban ground surface or the building surface in the dense area of the urban building are obtained.
In the above embodiments, how to perform parameter setting of the leakage diffusion multiphase flow three-dimensional model is not limited, and in order to obtain more accurate leakage diffusion data, the inventors of the present application have conducted extensive research to determine a set of optimal effect parameters, which may include the following:
automatically setting a Fluent solver of the leakage diffusion multiphase flow three-dimensional model into a pressure-based solver according to the received parameter setting instruction;
automatically setting the operating environment configuration information of the leakage diffusion multiphase flow three-dimensional model to be in a gravity direction of-Z, the gravity acceleration of 9.8m/s2 and the operating environment pressure of one atmosphere according to the received parameter setting instruction;
automatically setting a turbulence model of the leakage diffusion multiphase flow three-dimensional model as a standard k-model according to the received parameter setting instruction;
automatically setting a calculation method of the leakage diffusion multiphase flow three-dimensional model into a PISO algorithm according to the received parameter setting instruction;
automatically setting the initial condition and the boundary condition of the leakage diffusion multiphase flow three-dimensional model to be 0% of the concentration of the oil phase before the pipeline is not leaked according to the received parameter setting instruction; defining the surface and the ground surface of a building as walls, and taking 200mm small leakage holes as speed inlets and the size of the small leakage holes as 5 m/s; 5 surfaces of the surface of the calculation area except the surface of the earth are all set as pressure outlets, and the gauge pressure is 0.
That is, the boundary conditions of the three-dimensional model of the leakage diffusion multiphase flow of the present application are the velocity inlet and pressure outlet conditions, the inlet velocities are 5m/s and 20m/s, and the outlet pressure is atmospheric pressure, based on the calculation results of the leakage amount calculation relation and the fluid velocity calculation relation. Setting the volume fraction of the oil phase in the initial state as 0, calculating the unsteady state process by adopting a PISO method, and selecting a standard k-turbulence model. The time step size can be set to 0.005s, and the flow time is 20s for 4000 preliminary calculations.
The different operating pressures within the tube will result in oil being injected into the air from the fracture at different leakage rates. Since the crude oil is dispersed on the ground as a dynamic process, and each time has a different dispersion state, as an alternative embodiment, referring to fig. 4, the present application may further include the following:
s104: and acquiring oil phase cloud pictures of the leakage diffusion multi-phase flow three-dimensional model at different output moments.
S105: and defining oil phase cloud charts at different moments as corresponding time frames so as to obtain the regional range and leakage speed of the leakage object leaking along with time.
S106: the leakage process of the leakage is visually displayed according to the area range and the leakage speed of the leakage along with the time, so as to dynamically show the whole process that the leakage is sprayed to the air from the small hole leakage and then falls to the ground and spreads on the ground surface.
In the embodiment of the invention, for example, the Ansys Post can be used to process the phase concentration distribution maps at different times, so that the whole process of oil product leakage, injection from the small hole to the air, then falling to the ground and spreading on the ground surface can be dynamically observed, then other image processing software is used to perform superposition processing to obtain a leakage range schematic diagram, and 3 different times are superposed to obtain the crude oil leakage schematic diagram shown in fig. 5 and 6.
Taking the crude oil leakage of the transportation pipeline in the building area shown in fig. 2 as an example, if the pipeline leakage position is a circular small hole with a diameter smaller than one tenth of the pipe diameter, after the visual display processing of S106, the leakage diffusion overlooking dynamic diagram when the leakage speed is 5m/S can be observed, and it is found that about 1.4S of crude oil is sprayed to the highest, then falls down, and then is kept at a certain height for gushing; crude oil begins to appear on the ground for 2.5s, then the leakage range is larger and larger, a liquid pool formed by the oil products before the oil products pollute a building is in a complete symmetrical shape, and once the oil pool touches the building, the shape of the liquid pool is pulled to a certain direction due to the irregular arrangement of the building. When the leakage speed is increased to 20m/s, the whole rule is the same as that of 5m/s, about 2.5s of crude oil is sprayed to 20m at most, then falls down and then appears periodic gushing; crude oil began to appear at the 6s surface, with subsequent larger and larger leaks.
It should also be noted that in the event of a leakage of oil in a dense area of a building, the diffusion radius or diffusion area of the oil is a factor that measures the diffusion process. Due to the blocking of the building, the diffusion speeds of the leaked oil products in the two directions are different, and the influence of different building layouts on the leakage rates in the two directions can be researched by analyzing the leakage speeds in the x direction and the y direction respectively. As can be seen from the above illustrative example, at the initial moment of leakage, the pipeline suddenly loses pressure, and the outlet is in a jet shape; the crude oil rapidly falls under the action of gravity after reaching the highest point, and spreads to the periphery by taking the falling point as the center after contacting the ground, so that the spreading range is larger and larger; when the leakage speed is not more than 20m/s, the time for crude oil to start diffusing is about 5s, and the diffusion of the crude oil in different directions can be greatly influenced due to the arrangement of buildings, so that the large-scale environmental pollution is avoided, a small oil blocking device can be arranged in a high-frequency damage area of a pipeline to enable the crude oil to be far away from a crowd-concentrated area, and property and organisms are protected from the influence of crude oil leakage.
It should be noted that, in the present application, there is no strict sequential execution order among the steps, and as long as a logical order is met, the steps may be executed simultaneously or according to a certain preset order, and fig. 1 and fig. 4 are only schematic manners, and do not represent only such an execution order.
The embodiment of the invention also provides a corresponding device for the method for generating the leakage diffusion data of the urban building group conveying pipeline, so that the method has higher practicability. Wherein the means can be described separately from the functional module point of view and the hardware point of view. In the following, the city building group transportation pipeline leakage diffusion data generation device provided by the embodiment of the present invention is introduced, and the city building group transportation pipeline leakage diffusion data generation device described below and the city building group transportation pipeline leakage diffusion data generation method described above may be referred to in correspondence with each other.
Based on the angle of the functional module, referring to fig. 7, fig. 7 is a structural diagram of an urban building group transportation pipeline leakage diffusion data generation device according to an embodiment of the present invention, in a specific implementation manner, the device may include:
the diffusion area model building module 701 is configured to build a three-dimensional diffusion area model based on an urban building layout of a building area where a delivery pipe with a leakage hole is located, and perform meshing processing on the three-dimensional diffusion area model.
And the leakage information calculation module 702 is configured to calculate leakage amount and flow rate information of the leakage object according to the pressure in the delivery pipe, the position of the pipe where the liquid level of the leakage object is located, and the density of the leakage object.
The leakage diffusion data generation module 703 is configured to automatically fill the calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction, so that the leakage diffusion multiphase flow three-dimensional model automatically generates leakage diffusion data of a leakage object in the building diffusion area based on the three-dimensional diffusion area model, the leakage amount, and the flow speed information; the calculation parameters comprise a solver type, operating environment configuration information, physical properties of the two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions.
Optionally, in some embodiments of this embodiment, the leakage information calculating module 702 may be specifically configured to:
calculating leakage amount and flow rate information of a leakage object by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation;
the leakage amount is calculated by the relation of
Figure BDA0002526668640000141
The fluid velocity is calculated as
Figure BDA0002526668640000142
Wherein Q is leakage, u is flow rate information, and PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0Is the leakage coefficient of the liquid; a is the sectional area of the break of the conveying pipeline, and the unit is m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。
Optionally, in other embodiments of this embodiment, referring to fig. 8, the apparatus may further include:
and the leakage detail data calculation module 704 is used for defining oil phase cloud maps at different moments acquired from the leakage diffusion multiphase flow three-dimensional model as corresponding time frames so as to obtain the leakage area and the leakage speed of the leakage object along with time.
And the visual display module 705 is used for visually displaying the leakage process of the leakage object according to the area range and the leakage speed of the leakage object leaking along with the time so as to dynamically show the whole process that the leakage object is sprayed to the air from the small hole leakage and then falls to the ground and spreads on the ground surface.
The functions of the functional modules of the device for generating leakage diffusion data of the urban building group delivery pipeline according to the embodiment of the present invention can be specifically implemented according to the method in the embodiment of the method, and the specific implementation process may refer to the description related to the embodiment of the method, which is not described herein again.
Therefore, the embodiment of the invention realizes accurate analysis and obtains the diffusion and migration data of the oil pollutants leaked from the conveying pipeline in the dense area of the urban building on the urban ground surface or the surface of the building.
The device for generating the leakage diffusion data of the urban building group conveying pipeline is described from the perspective of a functional module, and further, the application also provides a device for generating the leakage diffusion data of the urban building group conveying pipeline, which is described from the perspective of hardware. Fig. 9 is a block diagram of another city building group conveying pipeline leakage diffusion data generation device according to an embodiment of the present application. As shown in fig. 9, the apparatus includes a memory 90 for storing a computer program;
the processor 91 is configured to implement the steps of the city building group transportation pipeline leakage diffusion data generation method according to any one of the above embodiments when executing the computer program.
Among other things, the processor 91 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 91 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 91 may also include a main processor and a coprocessor, the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 91 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 91 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
The memory 90 may include one or more computer-readable storage media, which may be non-transitory. Memory 90 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 90 is at least used for storing a computer program 901, wherein the computer program is loaded and executed by the processor 91, and then the relevant steps of the method for generating urban building group transportation pipeline leakage diffusion data disclosed in any of the foregoing embodiments can be implemented. In addition, the resources stored by the memory 90 may also include an operating system 902, data 903, and the like, and the storage may be transient storage or permanent storage. The operating system 902 may include Windows, Unix, Linux, etc. Data 903 may include, but is not limited to, data corresponding to test results, and the like.
In some embodiments, the city building group transportation pipeline leakage diffusion data generating device may further include a display screen 92, an input/output interface 93, a communication interface 94, a power supply 95, and a communication bus 96, and may further include a sensor 97, for example.
Those skilled in the art will appreciate that the configuration shown in fig. 9 does not constitute a limitation of the urban mass transit pipe leak spread data generating device and may include more or fewer components than those shown, such as sensors 97.
The functions of the functional modules of the device for generating leakage diffusion data of the urban building group delivery pipeline according to the embodiment of the present invention can be specifically implemented according to the method in the embodiment of the method, and the specific implementation process may refer to the description related to the embodiment of the method, which is not described herein again.
Therefore, the embodiment of the invention realizes accurate analysis and obtains the diffusion and migration data of the oil pollutants leaked from the conveying pipeline in the dense area of the urban building on the urban ground surface or the surface of the building.
It is understood that, if the method for generating the leakage diffusion data of the urban building group delivery pipeline in the above embodiment is implemented in the form of a software functional unit and sold or used as a stand-alone product, the method may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application may be substantially or partially implemented in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods of the embodiments of the present application, or all or part of the technical solutions. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), an electrically erasable programmable ROM, a register, a hard disk, a removable magnetic disk, a CD-ROM, a magnetic disk, or an optical disk.
Based on this, an embodiment of the present invention further provides a computer-readable storage medium, in which a city building group transportation pipeline leakage diffusion data generation program is stored, and when the city building group transportation pipeline leakage diffusion data generation program is executed by a processor, the steps of the city building group transportation pipeline leakage diffusion data generation method according to any one of the above embodiments are performed.
The functions of the functional modules of the computer-readable storage medium according to the embodiment of the present invention may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, which is not described herein again.
Therefore, the embodiment of the invention realizes accurate analysis and obtains the diffusion and migration data of the oil pollutants leaked from the conveying pipeline in the dense area of the urban building on the urban ground surface or the surface of the building.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The method, the device and the computer readable storage medium for generating the leakage diffusion data of the urban building group conveying pipeline provided by the application are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present application.

Claims (10)

1. A method for generating leakage diffusion data of a transport pipeline of an urban building group is characterized by comprising the following steps:
constructing a three-dimensional diffusion area model based on an urban building layout of a building area where a conveying pipeline with leakage holes is located, and performing grid division on the three-dimensional diffusion area model;
calculating the leakage amount and the flow speed information of the leakage object according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage object is located and the density of the leakage object;
automatically filling calculation parameters of a leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction so that the leakage diffusion multiphase flow three-dimensional model automatically generates leakage diffusion data of the leakage object in a building diffusion area based on the three-dimensional diffusion area model, the leakage amount and the flow speed information;
the calculation parameters comprise a solver type, operating environment configuration information, physical properties of the two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions.
2. The city building group conveying pipeline leakage diffusion data generation method according to claim 1, wherein the calculating of the leakage amount and the flow speed information of the leakage according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage is located and the density of the leakage comprises:
calculating the leakage amount and the flow speed information of the leakage object by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation;
the leakage amount is calculated by the formula
Figure FDA0002526668630000011
The fluid velocity is calculated by the relation
Figure FDA0002526668630000012
Wherein Q is the leakage amount, u is the flow rate information, PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0Is the leakage coefficient of the liquid; a is the breakage of the conveying pipelineCross sectional area of mouth in m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。
3. The method for generating the leakage diffusion data of the urban building complex conveying pipeline according to the claim 2, wherein the step of automatically filling the calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction comprises the following steps:
automatically setting a Fluent solver of the leakage diffusion multiphase flow three-dimensional model into a pressure-based solver according to the received parameter setting instruction;
automatically setting the operating environment configuration information of the leakage diffusion multiphase flow three-dimensional model to be in a gravity direction of-Z, a gravity acceleration of 9.8m/s2 and an operating environment pressure of one atmosphere according to the received parameter setting instruction;
automatically setting the turbulence model of the leakage diffusion multiphase flow three-dimensional model to be a standard k-model according to the received parameter setting instruction;
automatically setting the calculation method of the leakage diffusion multiphase flow three-dimensional model into a PISO algorithm according to the received parameter setting instruction;
automatically setting the initial condition and the boundary condition of the leakage diffusion multiphase flow three-dimensional model to be 0% of the concentration of the oil phase before the pipeline is not leaked according to the received parameter setting instruction; defining the surface and the ground surface of a building as walls, and taking 200mm small leakage holes as speed inlets and the size of the small leakage holes as 5 m/s; 5 surfaces of the surface of the calculation area except the surface of the earth are all set as pressure outlets, and the gauge pressure is 0.
4. The method for generating the leakage diffusion data of the transportation pipeline of the urban building complex according to any one of claims 1 to 3, wherein after the automatically filling the calculation parameters of the leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction, the method further comprises:
acquiring oil phase cloud charts of the leakage diffusion multi-phase flow three-dimensional model at different output moments;
and defining oil phase cloud charts at different moments as corresponding time frames to obtain the regional range and leakage speed of the leakage object leaking along with time.
5. The city building group pipeline leakage diffusion data generation method according to claim 4, wherein the positioning of oil phase clouds at different time points as corresponding time frames to obtain the leakage area range and the leakage speed of the leakage object along with time further comprises:
and visually displaying the leakage process of the leakage according to the area range and the leakage speed of the leakage along with the time so as to dynamically show the whole process that the leakage of the leakage is sprayed to the air from the small hole and then falls to the ground and spreads on the ground surface.
6. The utility model provides a city building crowd delivery pipe leaks diffusion data generation device which characterized in that includes:
the diffusion area model building module is used for building a three-dimensional diffusion area model based on an urban building layout of a building area where a conveying pipeline with leakage holes is located and carrying out grid division processing on the three-dimensional diffusion area model;
the leakage information calculation module is used for calculating the leakage amount and the flow speed information of the leakage object according to the pressure in the conveying pipeline, the position of the pipeline where the liquid level of the leakage object is located and the density of the leakage object;
the leakage diffusion data generation module is used for automatically filling calculation parameters of a leakage diffusion multiphase flow three-dimensional model according to the received parameter setting instruction so as to enable the leakage diffusion multiphase flow three-dimensional model to automatically generate leakage diffusion data of the leakage object in a building diffusion area based on the three-dimensional diffusion area model, the leakage amount and the flow speed information;
the calculation parameters comprise a solver type, operating environment configuration information, physical properties of the two-phase material, a turbulence model, a calculation method, initial conditions and boundary conditions.
7. The urban building group transmission pipeline leakage spread data generation device according to claim 6, wherein the leakage information calculation module is specifically configured to:
calculating the leakage amount and the flow speed information of the leakage object by using a pre-constructed pipeline leakage parameter calculation relational expression; the pipeline leakage parameter calculation relation comprises a leakage quantity calculation relation and a fluid speed calculation relation;
the leakage amount is calculated by the formula
Figure FDA0002526668630000031
The fluid velocity is calculated by the relation
Figure FDA0002526668630000032
Wherein Q is the leakage amount, u is the flow rate information, PgIs the gauge pressure of the conveying pipeline, and the unit is Pa; h isLThe height value of the liquid level relative to the leakage port is m; c0Is the leakage coefficient of the liquid; a is the sectional area of the break of the conveying pipeline, and the unit is m2G is the acceleration of gravity and ρ is the density of the leak in kg/m3。
8. The city building group conveying pipeline leakage diffusion data generation device according to claim 6 or 7, further comprising:
and the leakage detail data calculation module is used for defining oil phase cloud pictures at different moments acquired from the leakage diffusion multiphase flow three-dimensional model as corresponding time frames so as to obtain the leakage area range and the leakage speed of the leakage object along with time.
9. An urban building group transportation pipeline leakage spread data generation device, comprising a processor for implementing the steps of the urban building group transportation pipeline leakage spread data generation method according to any one of claims 1 to 5 when executing a computer program stored in a memory.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores thereon a city building group transportation pipeline leakage spread data generation program, which when executed by a processor implements the steps of the city building group transportation pipeline leakage spread data generation method according to any one of claims 1 to 5.
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