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Numerical analog method for impact of gas pipeline leakage on internal flow field

A gas pipeline, numerical simulation technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve a comprehensive effect of analysis

Inactive Publication Date: 2018-01-16
HARBIN UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

In China, the analysis of the numerical simulation and diffusion characteristics of natural gas pipeline leakage needs to be further deepened and improved.

Method used

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  • Numerical analog method for impact of gas pipeline leakage on internal flow field
  • Numerical analog method for impact of gas pipeline leakage on internal flow field
  • Numerical analog method for impact of gas pipeline leakage on internal flow field

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Embodiment Construction

[0074] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are illustrative only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0075] Such as Figure 1 to Figure 12 As shown, this embodiment adopts the following technical solutions:

[0076] 1. Basic theory and simulation software of fluid mechanics:

[0077] 1.1. Basic theory of fluid mechanics:

[0078] In the study of fluid mechanics problems, there are three most basic conservation laws, including conservation of mass, conservation of momentum, and conservation of energy. The present invention applies several basic hydrodyna...

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Abstract

The invention discloses a numerical analog method for impact of gas pipeline leakage on an internal flow field, relating to the technical field of gas. The analog method comprises the following stepsof building analog software; modeling gas pipeline leakage and performing simulation analysis; and analyzing gas pipeline leakage numerical results. Before and after gas pipeline leakage, changes of the internal flow field of the pipeline are analyzed; according to computational fluid dynamics (CFD) knowledge, gas pipeline leakage is simulated by using Fluent, and according to fluid dynamics theory, characteristics of the internal flow field of the gas pipeline before and after leakage are obtained through analysis; according to CFD knowledge, gas pipeline leakage under different leakage conditions is simulated, so as to learn that the greater the inlet pressure, the more likely that a leakage accident occures, and the greater the leakage hole diameter, the higher the proportion of a highconcentration area surrounding the leakage hole.

Description

Technical field: [0001] The invention relates to a numerical simulation method for the influence of gas pipeline leakage on an internal flow field, and belongs to the technical field of gas. Background technique: [0002] Today's gas pipeline transportation has become the most convenient and economical transportation method. However, when the gas pipeline leaks due to soil corrosion, pipeline aging or damage by other parties, if the location of the leak point cannot be detected in time, the rescue time will be affected. Therefore, exploring the leakage diffusion law of the gas pipeline for accurate location of the leak point , leakage prevention, etc. are of great significance. And when a leakage accident occurs, if the parameters of the leakage source can be determined in the shortest time, so as to further divide the emergency evacuation area, it can provide a basis for decision makers to initiate emergency response, thereby reducing property losses and casualties. [00...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李明孙超常瑞倩安海琴于彬常嘉文
Owner HARBIN UNIV OF SCI & TECH
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