Airflow-dust gas-solid two-phase flow numerical simulation method considering environmental humidity factor

Abstract

The invention belongs to the technical field of coal mine underground fluid mechanics, and discloses an air flow-dust gas-solid two-phase flow numerical simulation method considering an environmental humidity factor, and the method comprises the steps: building a fully-mechanized face physical model according to a geological survey result; taking air flow and water vapor in air as a continuous phase, and describing fluid motion of the fully mechanized coal mining face by utilizing an Euler method; carrying out turbulence simulation by adopting a Reynolds time-averaging equation, solving by utilizing a k-epsilon equation, and expressing a transient pulsating quantity in the time-averaging equation; and establishing a mathematical model by using a component transport equation in the component transport model and an Euler-Lagrange equation in the dispersed phase model, and meanwhile, expressing the critical offset of particles in the collision process by using an O'Rourke formula due to the influence of a humidity field on the dust particles, so as to simulate the dust movement process in the fully mechanized coal mining face. The method provides a sufficient theoretical basis for researching the influence of the humidity field on the migration and diffusion of the dust in the coal mining process of the fully mechanized coal mining face.

Description

technical field [0001] The invention belongs to the technical field of coal mine fluid mechanics, and in particular relates to a numerical simulation method for wind flow-dust gas-solid two-phase flow in consideration of environmental humidity factors. Background technique [0002] At present, coal is the most important basic energy in my country. In recent years, due to the rapid advancement of the national economy, my country's coal production and coal consumption have also grown rapidly. As the most common place for coal production in my country, the fully mechanized mining face provides a large amount of coal resources for my country every year. In recent years, with the enlargement of fully-mechanized mining equipment, the dust production and dust concentration in the coal mining process have increased significantly, which requires a large amount of water in the mining process, which is the main reason for the excessive air humidity in the fully-mechanized mining face. ...

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Problems solved by technology

Specifically, when exploring the law of wind flow and dust migration and diffusion in fully mechanized mining faces, previous studies only used the Euler model and the Langrange model for numerical simulation calculations

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