A Structured Dynamic Mesh Modeling Method for Vortex Fluid Machinery

Abstract

The invention discloses a structured dynamic mesh modeling method for a vortex type fluid machine. The structured dynamic mesh modeling method comprises the following steps: establishing an initial structured mesh model of the vortex type fluid machine; performing translational motion of mesh nodes on all mesh nodes in the initial structured mesh model of the vortex type fluid machine; on the basis of the translational motion, performing revolution translational motion on all the mesh nodes in the initial structured mesh model of the vortex type fluid machine to finally obtain the structured mesh model of the vortex type fluid machine. Through the application of the structured dynamic mesh modeling method disclosed by the invention, the distribution rule of an inner flow field in the vortex type fluid machine is obtained, the inner flow field can be indicated more accurately, and the method has an important theoretical significance for the research on the internal flow characteristics of the vortex type fluid machine.

Description

technical field [0001] The invention relates to the field of vortex fluid machinery, in particular to a structured dynamic grid modeling method for vortex fluid machinery. Background technique [0002] The scroll fluid machine belongs to a volumetric fluid machine, and the compression part is mainly composed of a moving scroll and a fixed scroll. The main moving part of the scroll fluid machinery is a moving and static scroll, so it has a longer life and is known as a maintenance-free compressor. The unique design of scroll fluid machinery makes it have the advantages of stable operation, small vibration, light weight and long life. [0003] The scroll fluid machinery relies on the revolution and translation between the movable and static scroll teeth to form multiple working chambers with periodic volume changes to realize its working process; its characteristics are: ①with a moving boundary; ②including multiple volume cycles The working chamber with permanent changes and...

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Problems solved by technology

[0005] The existing models applied to the numerical simulation method of scroll fluid machinery include unstructured grid model, and the unstructured grid model is commonly used. During the use of the grid model, due to the reconstruction of the grid Regeneration will cause only a single layer of mesh at the meshing gap, so that the number of meshes is too small to meet the needs of accurate calculations, and it is easy to cause problems such as negative volume; for structured mesh models, currently only the structure for a single working cavity The mesh model is not solved, and the mesh problem at the meshing gap is not solved, and the actual operating state cannot be simulated[1]

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