Simulation method for cleaning water supply pipeline by ice slurry

A technology of water supply pipeline and simulation method, which is applied in the fields of instruments, electrical digital data processing, computer-aided design, etc., can solve the problems of large wear degree of pipelines, difficult to popularize, and large water consumption, so as to ensure calculation accuracy and save calculation resources. , a wide range of effects

Pending Publication Date: 2022-01-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the currently commonly used pipeline cleaning methods, the cleaning method has a large degree of wear on the pipeline, and it is difficult to ensure that the complete anti-corrosion layer is retained after the pipeline is cleaned, and the cleaning takes a long time, which affects the living water of residents; while the flushing method can only be applied to small diameters. The cleaning effect of pipe cleaning is poor for large-diameter and long pipes, and it is difficult to carry out large-scale promotion. At the same time, it consumes a lot of water and cannot meet the basic policy of water conservation in my country.

Method used

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  • Simulation method for cleaning water supply pipeline by ice slurry
  • Simulation method for cleaning water supply pipeline by ice slurry
  • Simulation method for cleaning water supply pipeline by ice slurry

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Experimental program
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Embodiment 1

[0110] Such as figure 1 As shown, a kind of simulation method of ice slurry cleaning water supply pipeline is provided for the present embodiment, comprises the following steps:

[0111] S1: Building a Physical Model

[0112] 11) Based on the Euler-Euler framework in computer fluid dynamics, the present invention constructs a numerical simulation model suitable for describing the isothermal flow of high-concentration solid-liquid two-phase flow, and calculates and solves it through the commercial software Fluent.

[0113] 12) The numerical simulation model in the present invention first establishes the instantaneous and local conservation equations of solid and liquid two-phase, and then establishes the model of the two-phase flow control equation and interphase force. The control equation includes the continuous phase equation of solid and liquid two-phase, The momentum equation of the solid and liquid phases, the shear force equation of the solid and liquid phases, the turb...

Embodiment 2

[0222] Based on the water-propelled ice slurry isothermal flow model proposed in Embodiment 1 of the present invention, the Fluent software is used to solve the problem.

[0223] Step 1: Construct the pipeline physical model.

[0224] The size of the pipeline model should meet L≥100D, and the simulated pipe diameter is 50mm and the pipe length is 5m. Use the pre-processor of Fluent software to draw the pipeline physical model.

[0225] Step 2: Divide the pipeline grid.

[0226] Use the pre-processor ICEM software of Fluent software to divide the grid, first name the inlet, outlet and wall of the pipeline; then divide the pipeline into a whole block, here you need to modify the cuboid block into a cylindrical block of the pipeline; select the pipeline as the body , entrance and exit as surfaces, and perform O-shaped block segmentation; use the mesh modification tool to modify the boundary layer length of the entrance and exit to 6.25m; use the mesh division tool to set the nu...

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Abstract

The invention discloses a simulation method for cleaning a water supply pipeline by ice slurry. The invention relates to a simulation method for cleaning a water supply pipeline by ice slurry. Comprising the following steps: constructing a physical model in which water pushes ice slurry to flow at an isothermal temperature; setting material physical properties of solid and liquid phases of ice slurry for flushing the water supply pipeline; setting boundary conditions of isothermal flow of ice slurry pushed by water; setting initial conditions of isothermal flow of ice slurry pushed by water; providing a pipeline model mesh generation method in the ice slurry cleaning water supply pipeline model; and setting solving conditions of the ice slurry cleaning water supply pipeline model. The numerical simulation model is wide in application range, can simulate water to push ice slurry to flow in an isothermal mode, conforms to the actual physical condition, the simulation result is close to the actual water supply pipeline flushing condition, and meanwhile, the calculation resource is saved on the premise that the simulation accuracy is guaranteed.

Description

technical field [0001] The invention relates to the field of pipeline cleaning, in particular to an analysis method for simulating the effect of cleaning pipelines by solid-liquid two-phase flow. Background technique [0002] Among the currently commonly used pipeline cleaning methods, the cleaning method has a large degree of wear on the pipeline, and it is difficult to ensure that the complete anti-corrosion layer is retained after the pipeline is cleaned, and the cleaning takes a long time, which affects the living water of residents; while the flushing method can only be applied to small diameters. The cleaning effect of pipe cleaning is poor for large-diameter and long pipes, and it is difficult to carry out large-scale promotion. At the same time, it consumes a lot of water and cannot meet the basic policy of water conservation in my country. Ice slurry pigging has become a more efficient pigging method due to its fluidity, high shear force, convenient operation, low wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/14
CPCG06F30/28G06F2113/14
Inventor 胡佳敏陶涛王嘉莹信昆仑颜合想李树平
Owner TONGJI UNIV
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