融入物理因素的燃烧仿真与安全危害评估

Combustion simulation and safety hazard assessment incorporating physical factors

摘要

针对燃烧模拟中的多物理场耦合问题,本文提出一种基于粒子与多边形表面网格的数值模拟方法。该方法围绕燃烧过程中流体流动、热传导、化学反应、湍流扰动及风场作用等物理过程,建立多物理场耦合模型,并分析燃烧的基本参数与动态演化特性。在耦合建模过程中,重点刻画火焰扩展、热量传播、气流扰动与燃烧反应之间的复杂相互作用及其耦合效应。本文方法能够较准确地模拟燃烧过程中的热量传播、火焰扩展及其对周围环境的影响,进而预测火势扩散路径与潜在危害,并在预测流体流动、热量传递、化学反应与风场扰动等物理过程之间交互作用以及模拟燃烧动态特性方面效果良好。

Abstract

To address the problem of multiphysics coupling in combustion simulation, a numerical simulation method is proposed based on particles and polygonal surface meshes. The proposed method establishes a multiphysics coupling model for the combustion process by considering physical processes such as fluid flow, heat conduction, chemical reactions, turbulent disturbances, and wind-field effects, and analyzes the basic parameters and dynamic evolution characteristics of combustion. During the coupling modeling process, the complex interactions and coupling effects among flame propagation, heat transfer, airflow disturbance, and combustion reactions are specifically characterized. The proposed method can accurately simulate heat transfer, flame propagation, and their influence on the surrounding environment during combustion, thereby predicting fire-spread paths and potential hazards. Simulation results show that the proposed method can effectively predict the interactions among fluid flow, heat transfer, chemical reactions, and wind-field disturbances, as well as in capturing the dynamic characteristics of combustion.

关键词

燃烧 / 多物理场 / 粒子 / 扩散 / 仿真

Key words

combustion / multi-physical fields / particles / propagation / simulation

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基金资助

国家重点研发计划资助项目(2022YFC3004400)