CN112214936A - Optimal design method and system for hydrogen energy automobile cooling water pump arrangement scheme - Google Patents
Optimal design method and system for hydrogen energy automobile cooling water pump arrangement scheme Download PDFInfo
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- CN112214936A CN112214936A CN202010939771.2A CN202010939771A CN112214936A CN 112214936 A CN112214936 A CN 112214936A CN 202010939771 A CN202010939771 A CN 202010939771A CN 112214936 A CN112214936 A CN 112214936A
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Abstract
The invention provides an optimal design method and system for a hydrogen energy automobile cooling water pump arrangement scheme, which is a CFD (computational fluid dynamics) simulation method aiming at the arrangement position of a water pump in a cooling system pipeline of a hydrogen fuel cell automobile. The invention has the beneficial effects that: the optimal water pump arrangement scheme is determined through simulation analysis, and effective heat dissipation of heating components can be guaranteed under different working conditions of the hydrogen energy automobile.
Description
Technical Field
The invention relates to the field of cooling water pump layout optimization, in particular to an optimization design method and system for a hydrogen energy automobile cooling water pump layout scheme.
Background
In a power system of a hydrogen fuel cell automobile, a plurality of heating components and large heat productivity generate useless heat, the performance of automobile equipment is directly influenced, and even equipment can be damaged. However, in a hydrogen fuel cell vehicle, each heating component has different requirements on cooling water flow, and a water pump is a power source for forming pressure fluid by driving a blade to rotate through a motor, and generally has problems of vibration, noise, heating and the like caused by high-speed rotation, and if the arrangement and the arrangement of the water pump are not reasonable, cavitation is easily caused. Therefore, the location of the water pump becomes particularly important in the piping design.
Disclosure of Invention
In view of this, the present invention provides a method for performing CFD (Computational Fluid Dynamics) simulation on water pump arrangement positions in a cooling system pipeline of a hydrogen fuel cell vehicle, in which different positions and different numbers of water pumps are arranged in the cooling pipeline through simulation software to form different design schemes, and then working conditions of heating components under the respective design schemes are compared to obtain an optimal water pump arrangement scheme.
The invention provides an optimal design method for an arrangement scheme of a hydrogen energy automobile cooling water pump, which comprises the following steps of:
s1, creating a three-dimensional model of a cooling pipeline in the hydrogen energy automobile by using software of professional computational fluid dynamics;
s2, obtaining a cooling water basin from the three-dimensional model constructed in the step S1 through a filling command in software, carrying out meshing on the cooling water basin by using a meshing tool, and determining nodes of heat source centralized distribution;
s3, arranging water pumps at different positions of the grids divided in the step S2 to form different design schemes, modeling the flowing state of cooling water in the pipeline, and discretizing corresponding flow control equations after the water pumps are added under the different design schemes;
s4, solving the flow control equation discretized in the step S3 to obtain the numerical values of the cooling water flow and the inlet and outlet temperatures at each node under different design schemes;
and S5, comparing the values obtained in the step S4 under different design schemes, and determining the optimal water pump arrangement scheme.
The invention also provides an optimal design system of the arrangement scheme of the hydrogen energy automobile cooling water pump, which comprises the following steps:
the model building module is used for creating a three-dimensional model of a cooling pipeline in the hydrogen energy automobile by utilizing software of professional computational fluid dynamics;
the grid generation module is used for acquiring a cooling water drainage basin in the three-dimensional model through a filling command in software, performing grid division on the cooling water drainage basin by using a grid division tool and determining nodes of heat source centralized distribution;
the discretization model is used for arranging the water pumps at different positions of the grid to form different design schemes, and modeling the flowing state of the cooling water in the pipeline, so that the flow control equation of the cooling pipeline under different design schemes is discretized;
the solving module is used for solving the discretized flow control equation to obtain the numerical values of the cooling water flow and the inlet and outlet temperatures of all the nodes under different design schemes;
and the numerical analysis module is used for comparing numerical values of cooling water flow and inlet and outlet temperatures at all nodes obtained by calculation under different design schemes, and determining an optimal water pump arrangement scheme.
The technical scheme provided by the invention has the beneficial effects that: the optimal water pump arrangement scheme is determined through simulation analysis, and effective heat dissipation of heating components can be guaranteed under different working conditions of the hydrogen energy automobile.
Drawings
FIG. 1 is a flow chart of an optimal design method of a hydrogen energy automobile cooling water pump arrangement scheme provided by the embodiment of the invention;
FIG. 2 is a diagram of an optimal pump placement profile obtained by an embodiment of the present invention;
FIG. 3 is a water flow velocity distribution diagram in a cooling pipeline of a hydrogen-powered vehicle according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an optimal design method for a hydrogen energy automobile cooling water pump arrangement scheme, including the following steps:
s1, modeling: the three-dimensional model of the cooling circuit in the hydrogen energy automobile is created using specialized computational fluid dynamics software such as CFX, Fluent, phoenicics, Star-CD, comsol, etc., preferably Fluent, which is used in this embodiment, including pre-processing, solver, post-processing integration software package.
The step S1 also includes determining a flow control equation for the cooling circuit and initial boundary conditions.
S2, generating grids: obtaining a cooling water basin from the three-dimensional model constructed in the step S1 through a filling command in software, performing mesh division on the cooling water basin by using a mesh division tool, and determining nodes where heat sources are distributed in a concentrated manner; wherein the mesh is imparted with five layers of expanded boundary layers.
S3, discretization: arranging water pumps at different positions of the grids divided in the step S2 to form different design solutions, and describing the flow state of the cooling water in the pipeline by using a turbulence model, thereby discretizing the flow control equations of the different design solutions.
S4, solving: and (4) solving the flow control equation discretized in the step S3, if the equation is a linear equation, directly solving the algebraic solution of the equation, and if the equation is a nonlinear equation, solving the flow control equation discretized by using a SIMPLEC algorithm to obtain the numerical values of cooling water flow, inlet and outlet temperatures and the like at each node under different design schemes.
S5, numerical analysis: comparing the values obtained in step S4 under different design solutions, and determining an optimal water pump arrangement solution, as shown in fig. 2, the optimal water pump arrangement position finally obtained in this embodiment. Referring to fig. 3, the arrangement is performed according to the optimal water pump arrangement scheme to obtain the water flow velocity distribution in the hydrogen energy automobile cooling pipeline, and the gray scale in fig. 3 corresponds to the corresponding water flow velocity.
The invention also provides an optimization design system of the hydrogen energy automobile cooling water pump arrangement scheme, which comprises a model construction module, a grid generation module, a discretization model, a solving module and a numerical analysis module.
The model building module is used for creating a three-dimensional model of a cooling pipeline in the hydrogen energy automobile by utilizing software of professional computational fluid dynamics, and is also used for determining a flow control equation and initial boundary conditions of the cooling pipeline.
The grid generation module is used for acquiring a cooling water drainage basin in the three-dimensional model through a filling command in software, performing grid division on the cooling water drainage basin by using a grid division tool, and determining nodes of heat source centralized distribution; wherein the mesh is imparted with five layers of expanded boundary layers.
The discretization model is used for arranging the water pumps at different positions of the grid to form different design schemes, and modeling the flowing state of the cooling water in the pipeline by using the turbulence model, so that the flow control equation of the cooling pipeline under different design schemes is discretized.
The solving module is used for solving the discretized flow control equation to obtain the numerical values of the cooling water flow and the inlet and outlet temperatures of all the nodes under different design schemes; if the discretized flow control equation is a linear equation, algebraic solutions of the equations are directly solved, and if the discretized flow control equation is a nonlinear equation, the simple algorithm is used for solving.
The numerical analysis module is used for comparing numerical values of cooling water flow and inlet and outlet temperatures at all nodes obtained by calculation under different design schemes, and determining an optimal water pump arrangement scheme.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An optimal design method for a hydrogen energy automobile cooling water pump arrangement scheme is characterized by comprising the following steps:
s1, creating a three-dimensional model of a cooling pipeline in the hydrogen energy automobile by using software of professional computational fluid dynamics;
s2, obtaining a cooling water basin in the three-dimensional model through a filling command in software, carrying out meshing on the cooling water basin by using a meshing tool, and determining nodes of heat source centralized distribution;
s3, arranging water pumps at different positions of the grids divided in the step S2 to form different design schemes, and modeling the flow state of the cooling water in the pipeline so as to discretize the flow control equation of the cooling pipeline under the different design schemes;
s4, solving the flow control equation discretized in the step S3 to obtain the numerical values of the cooling water flow and the inlet and outlet temperatures at each node under different design schemes;
and S5, comparing the values obtained in the step S4 under different design schemes, and determining the optimal water pump arrangement scheme.
2. The method of claim 1, wherein the step S1 further comprises determining a flow control equation and initial boundary conditions of the cooling pipeline.
3. The method for optimally designing the arrangement scheme of the cooling water pump of the hydrogen-powered automobile according to claim 1, wherein in the step S3, the flow state of the cooling water in the pipeline is modeled by using a turbulence model.
4. The method as claimed in claim 1, wherein in step S4, if the discretized flow control equation in step S3 is a linear equation, the algebraic solution of the equation is directly solved, and if the equation is a non-linear equation, the discretized flow control equation is solved by a simple algorithm.
5. The utility model provides an optimal design system of hydrogen energy automobile cooling water pump arrangement scheme which characterized in that includes:
the model building module is used for creating a three-dimensional model of a cooling pipeline in the hydrogen energy automobile by utilizing software of professional computational fluid dynamics;
the grid generation module is used for acquiring a cooling water drainage basin in the three-dimensional model through a filling command in software, performing grid division on the cooling water drainage basin by using a grid division tool and determining nodes of heat source centralized distribution;
the discretization model is used for arranging the water pumps at different positions of the grid to form different design schemes, and modeling the flowing state of the cooling water in the pipeline, so that the flow control equation of the cooling pipeline under different design schemes is discretized;
the solving module is used for solving the discretized flow control equation to obtain the numerical values of the cooling water flow and the inlet and outlet temperatures of all the nodes under different design schemes;
and the numerical analysis module is used for comparing numerical values of cooling water flow and inlet and outlet temperatures at all nodes obtained by calculation under different design schemes, and determining an optimal water pump arrangement scheme.
6. The optimal design system of the arrangement scheme of the cooling water pump of the hydrogen-powered automobile according to claim 5, wherein the model building module is further used for determining a flow control equation and initial boundary conditions of the cooling pipeline.
7. The optimal design system of the arrangement scheme of the cooling water pump of the hydrogen-powered automobile according to claim 5, wherein the discretization model utilizes a turbulence model to model the flow state of the cooling water in the pipeline.
8. The optimal design system of the arrangement scheme of the cooling water pump of the hydrogen vehicle as claimed in claim 5, wherein in the solving module, if the discretized flow control equation is a linear equation, the algebraic solution of the equation is directly solved, and if the discretized flow control equation is a non-linear equation, the solution is performed by using a simple algorithm.
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Cited By (1)
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| CN114996850A (en) * | 2022-06-13 | 2022-09-02 | 一汽解放汽车有限公司 | Design analysis method of automobile cooling system based on CFD simulation technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114996850A (en) * | 2022-06-13 | 2022-09-02 | 一汽解放汽车有限公司 | Design analysis method of automobile cooling system based on CFD simulation technology |
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