Evaluation method for explosion of combustible vapor clouds

A vapor cloud explosion and explosion source technology, applied in the field of flammable vapor cloud explosion evaluation, can solve the problems of low evaluation speed and poor calculation accuracy

Inactive Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of poor calculation accuracy and

Method used

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  • Evaluation method for explosion of combustible vapor clouds
  • Evaluation method for explosion of combustible vapor clouds
  • Evaluation method for explosion of combustible vapor clouds

Examples

Experimental program
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Embodiment 1

[0016] A method for the assessment of flammable vapor cloud explosions, such as figure 1 shown, including the following steps:

[0017] 1. Use 3D tools to establish a full-scale 3D physical model of the leakage core area of ​​the device;

[0018] 2. According to the actual operating temperature, pressure, medium and the actual size of the device, evaluate the possible accidents of the device, and calculate the amount of leaked combustible gas that is within the explosion limit according to credible accident scenarios;

[0019] 3. Using the constructed three-dimensional physical model and the amount of combustible gas under credible accidents, the three-dimensional quantitative evaluation method based on N-S equation, continuity equation and energy equation is used to quantitatively calculate the combustion energy in the area of ​​the explosion source, and determine the explosion The intensity level of the source.

[0020] The assessment methodology consists of the following ...

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Abstract

The invention relates to a method for evaluating combustible vapor cloud explosion, which mainly solves the problems of poor precision and low evaluation speed in the prior art. A method for evaluatethat explosion of combustible vapor cloud comprises the follow steps of: (1) establishing a full-scale three-dimensional physical model of a leakage core area; (2) calculating the amount of combustible gas leaked out according to the credible accident scenario; (3) Based on N-S equation, continuity equation and energy equation, calculating The combustion energy of explosive source quantitatively and determining the intensity grade of explosive source. (4) According to the combustion energy and the intensity level of the explosive source, the Sachs analogy overpressure can be calculated, so theexplosive shock wave value in the far field can be calculated, which can be used to evaluate the explosion of the combustible vapor cloud.

Description

technical field [0001] The invention relates to an evaluation method for combustible vapor cloud explosion. Background technique [0002] For the evaluation and analysis of combustible gas explosion, the main methods available at present are TNT (trinitrotoluene explosive) equivalent method, TNO (Netherlands Institute of Science) multi-energy method and CFD method. For the TNT equivalent method, API752 and other standards have clearly stipulated that the TNT equivalent method cannot be used for gas explosion assessment in hazardous factories due to the inability to consider the degree to which the gas is restricted or hindered. The TNO multi-energy method is mainly used in partially restricted or hindered gas explosions, and considers the extent to which the gas in the explosion area is hindered or partially restricted. However, this method needs to be estimated when determining the combustion energy of the explosion source. The estimated results are the same as There may b...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 凌晓东党文义武志峰万古军于安峰姜雪张毅李厚达
Owner CHINA PETROLEUM & CHEM CORP
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