Real terrain modeling and toxic gas diffusion simulation method

Abstract

The invention relates to a real terrain modeling and toxic gas diffusion simulation method. The method comprises the following steps: acquiring digital geographic data; determining the range of a computational domain according to the selected longitude and latitude information; acquiring a three-dimensional altitude coordinate in a computational domain, and converting the three-dimensional coordinate into a space coordinate; creating points, lines and surfaces through modeling software to obtain a real terrain surface, and constructing a computational domain surface according to the real terrain surface; constructing a computational domain body according to the constructed computational domain surface; carrying out grid division on the computational domain body through a DesignModeler andANSYS meshing software, and carrying out grid division on the computational domain body through ANSYS meshing software; and importing the grid file after grid division into the FLUENT, and observing the leakage influence range and the concentration distribution by checking the concentration cloud atlas of each species. According to the method, topographic data and software for simulating leakage and diffusion of the gas under the complex topography are easy to obtain, operation is easy and quick, a proper simulation domain can be established quickly, a high-quality grid can be established, anddiffusion of the gas under various conditions can be simulated effectively and accurately.

Description

technical field [0001] The invention relates to the technical field of atmospheric environment risk management, in particular to a method based on real terrain modeling and poisonous gas diffusion simulation. Background technique [0002] my country's Northeast Sichuan natural gas reservoirs are rich in natural gas reserves, which are of great exploitation value. However, since 80% of the gas fields are high-sulfur gas fields (H2S content is higher than 5%), the process of high-sulfur natural gas exploitation, purification, and transportation brings Therefore, it is necessary to manage the environmental risks in these processes. At present, the diffusion of toxic and harmful gas pollutants in the atmosphere is simulated by models, mainly Gaussian models, BM models, FEM3 models, box and similar models, three-dimensional phenomenon transfer models, shallow models, computational fluid dynamics (CFD) models, etc. . Among them, the Gaussian model is mainly based on the empirical...

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a simulation method based on real terrain modeling and toxic gas diffusion, which can effectively solve the problem of long invalid running time of the existing main shaft gearbox lubrication system, inability to Guarantee the quality of lubricating oil, especially the failure to detect and diagnose abnormalities such as lubricating oil flow changes and leakage in time, resulting in insufficient lubrication, causing heat generation in the gear transmission system and vibration of the main shaft, and even damage to the gear transmission system, thereby improving the operating efficiency of the main shaft gearbox lubrication system and reliability

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