A Method of Establishing the Grid Model of Steam-water Separator under the Condition of Specific Desteaming Ratio

A steam-water separator and grid model technology, applied in 3D modeling, instruments, special data processing applications, etc., can solve problems such as increased workload, reduce workload, avoid re-geometric modeling work, and model independent effect

Active Publication Date: 2019-07-12
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

In order to analyze the influence of different degassing volumes on the field, it is necessary to establish the model of the descending annular cavity channel with various plugging ratios in the research, which leads to an increase in workload

Method used

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  • A Method of Establishing the Grid Model of Steam-water Separator under the Condition of Specific Desteaming Ratio
  • A Method of Establishing the Grid Model of Steam-water Separator under the Condition of Specific Desteaming Ratio
  • A Method of Establishing the Grid Model of Steam-water Separator under the Condition of Specific Desteaming Ratio

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Embodiment Construction

[0030] The following combination Figure 5 In the flow chart shown, the present invention is further described in detail by taking the grid model establishment process of the degassing condition of the vapor-water separator in the steam generator in the China Advanced Pressurized Water Reactor as an example.

[0031] The present invention sets up a method for the grid model of the steam-water separator under the specific degassing ratio condition, comprising the following steps:

[0032] Step 1: According to the actual design drawings of the steam-water separator components, establish the faces of the steam-water separator through the solidworks software, and according to the matching relationship of each face in the drawing, form the above-mentioned established surfaces into a single three-dimensional geometric model of the steam-water separator, according to The number of steam-water separators in the steam-water separator assembly in the real design, copy the 3D geometric m...

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Abstract

The invention discloses a method for establishing a mesh model of a steam-water separator under a specific desteam fraction condition, comprising the following steps: establishing a three-dimensionalgeometric model of a steam-water separator assembly in a steam generator and establishing a fluid domain geometric model on the basis of the three-dimensional geometric model; The unstructured tetrahedral mesh model of steam-water separator with full desteam in the descending annulus is established. Marking the grid cells in the descending annulus channel of the steam-water separator according tothe required desteam fraction, and setting the marked grid cells as porous media; The mesh model of steam-water separator with arbitrary degassing fraction in the descending annulus is established byadding a drag term which is three orders of magnitude larger than that in the other two directions to the porous media. The invention can flexibly adjust the descending annular cavity desteam share, and avoids repetitive geometric modeling work.

Description

technical field [0001] The invention belongs to the technical field of a steam generator steam-water separator, and in particular relates to a method for establishing a mesh model of a steam-water separator under the condition of a specific degassing ratio. Background technique [0002] The steam generator is an important large-scale heat exchange equipment in the reactor system and the hub of the primary and secondary loops of a typical nuclear power plant. In the steam generator, saturated steam is generated from the heat transfer tube bundle area, but due to the breakage of the liquid film at the interface between the phases and other reasons, the saturated steam will entrain a certain amount of liquid droplets. In order to ensure the safe operation of steam turbines, nuclear power plants are usually equipped with two-stage steam-water separation, namely the first-stage steam-water separator and the second-stage steam-water dryer. [0003] After the fluid working medium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06F30/20G06T17/00
Inventor 王明军房迪秋穗正田文喜苏光辉
Owner XI AN JIAOTONG UNIV
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