Explicit algorithm for solid particle erosion in liquid-phase elbow

A technology of solid particles and explicit algorithms, applied in computing, computer-aided design, special data processing applications, etc., can solve problems such as inapplicable engineering applications, cost, and large computing resources

Active Publication Date: 2019-08-16
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the detailed analysis of every detail in the particle erosion process of the elbow, the operation of this method is relatively complicated. Generally, grid divi

Method used

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  • Explicit algorithm for solid particle erosion in liquid-phase elbow
  • Explicit algorithm for solid particle erosion in liquid-phase elbow
  • Explicit algorithm for solid particle erosion in liquid-phase elbow

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Embodiment 1

[0090] Embodiment 1, this embodiment discloses an explicit algorithm for erosion of solid particles in a liquid phase elbow, including the following steps:

[0091] (1) Solve the basic characteristics of the flow field in the pipeline:

[0092] The Reynolds number Re of the turbulent flow pipeline is:

[0093]

[0094] where V m is the average velocity of the pipe flow, D is the diameter of the pipe, ρ f is fluid density, μ f is fluid viscosity;

[0095] The friction coefficient f of the pipeline is:

[0096]

[0097] Friction velocity v of pipe flow * for:

[0098]

[0099] (2) Solve the flow field inside the elbow:

[0100] According to the previous theoretical analysis, the axial velocity distribution V in the elbow i f for:

[0101]

[0102] Among them, V f is the axial velocity of the fluid in the long straight pipeline upstream of the elbow, and l is the radial coordinate of the fluid cluster in the elbow on a plane parallel to the symmetric plane ...

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Abstract

The invention discloses an explicit algorithm for solid particle erosion in a liquid-phase elbow. The explicit algorithm comprises the following steps: (1) solving basic characteristics of a flow field in a pipeline; (2) solving an elbow internal flow field; (3) calculating drop points of the particles; (4) calculating the collision speed of the particles; (5) solving the collision angle of the particles; (6) solving a material loss ratio at a particle collision point; (7) solving the effective sand conveying rate at the particle impact position; (8) solving an inlet erosion diffusion coefficient; and (9) calculating solid particle erosion on the elbow. The invention aims to provide an explicit algorithm for calculating the motion trail of solid particles in a liquid-phase elbow and causing erosion, an approximate flow field in the elbow is constructed based on related theories, an explicit solution of the motion trail is obtained by simplifying a particle motion equation, and materialloss caused by collision of particles with a pipe wall is tracked.

Description

technical field [0001] The invention belongs to the field of explicit algorithms for erosion of solid particles, in particular to an explicit algorithm for erosion of solid particles in a liquid phase elbow in the field. Background technique [0002] The problem of solid particle erosion in pipelines widely exists in various industrial equipment, such as oil and gas transmission pipelines, dredging and filling equipment, rotary dust collectors, aero engines, etc. The solid particles in the pipeline move together with the fluid at high speed, and will hit the inner wall of the pipeline with high momentum when the flow direction suddenly changes, causing serious material damage. As a common component that changes the direction of fluid flow, elbows are most prone to erosion by solid particles. Under the action of solid particle erosion, the pipeline becomes thinner, ruptures, and fluid leaks, which will cause serious production accidents and endanger the safety of personnel a...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 张日董胜王智峰陶山山
Owner OCEAN UNIV OF CHINA
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