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Nuclear facility near-field environment simulation numerical wind tunnel establishing system and method

A numerical wind tunnel and environmental simulation technology, applied in the field of radiation protection, can solve the problem that numerical wind tunnel is rarely reported.

Pending Publication Date: 2020-11-03
CHINA INST FOR RADIATION PROTECTION
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many studies on atmospheric diffusion simulation using CFD technology, but there are few reports on numerical wind tunnels for atmospheric environmental pollution.

Method used

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  • Nuclear facility near-field environment simulation numerical wind tunnel establishing system and method
  • Nuclear facility near-field environment simulation numerical wind tunnel establishing system and method
  • Nuclear facility near-field environment simulation numerical wind tunnel establishing system and method

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Experimental program
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Embodiment 1

[0066] The numerical wind tunnel simulation and verification process of the standard body model is described in detail below.

[0067] Such as Figure 2-3 As shown, the standard body is a cube, and the chimney diameter d=1.0mm, wherein, there are three kinds of relative positions between the chimney and the cube, namely the chimney position F (the chimney is located in the upwind direction of the cube), the chimney position O (the chimney is located above the cube center), chimney position H (the chimney is located downwind of the cube).

[0068] In CFD modeling, the center of the cube is used as the reference point of X and Y (the coordinates of X and Y are zero), and the lower surface of the cube (the ground of the wind tunnel) is used as the reference point of the Z coordinate (the coordinate of Z is zero).

[0069] The CFD simulation area is the test area of ​​the wind tunnel, and its geometric dimensions are: length (X direction): 17m, width (Y direction): 1.5m, height (...

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Abstract

The invention discloses a nuclear facility near-field environment simulation numerical wind tunnel establishing system and method, and the system comprises a preprocessing module which is used for setting boundary conditions and experiment conditions through a GUI interface, importing and processing a geometric model of a numerical wind tunnel simulation object, setting grid parameters, and automatically generating a grid; a CFD solver module which is used for realizing steady-state model solving, isothermal or non-isothermal model solving, multi-component transfer model solving and Lagrange particle model solving, considering the influence of buoyancy and lifting force and providing various turbulence models; a numerical wind tunnel simulation module which is used for selecting a corresponding turbulence model based on the preprocessing module and the CFD solver module and performing numerical wind tunnel simulation on near-field atmospheric diffusion of the nuclear facility to obtaina simulation result; and a post-processing module which is used for automatically extracting various types of data in the simulation result and carrying out visual output. Based on the CFD principle,a proper air turbulence model is selected, and nuclear facility near-field atmospheric diffusion can be accurately simulated.

Description

technical field [0001] The invention relates to the technical field of radiation protection, in particular to a system and method for establishing a numerical wind tunnel for simulating a near-field environment of a nuclear facility. Background technique [0002] In the field of radiation protection and environmental protection, the airborne radionuclide atmospheric diffusion model is widely used in the safety analysis of nuclear facilities, environmental impact assessment, accident consequence analysis, nuclear accident emergency response and habitability evaluation of the main control room. Among them, various modified Gaussian and Lagrangian models are generally recognized by nuclear safety management agencies in various countries, and are used in simulation calculations for radiation environmental impact assessment and accident consequence assessment. However, in reality, the flow field and diffusion process in the near-field of nuclear facilities are very complicated du...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 张俊芳姚仁太吕明华陈龙泉徐向军黄莎张新骞胡继民张芳杨彪
Owner CHINA INST FOR RADIATION PROTECTION
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