Dynamics of fire whirl in open + closed spaces: fundamental physics + modelling

开放封闭空间中的火旋动动力学：基础物理建模

• 批准号: 2110716
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2110716
• 关键词: Dynamics; fire; whirl; open; closed

A fire whirl is an intense and potentially devastating phenomena which under the correct conditions can result in the formation of a tornado-like structure, i.e., the heat released from a fire changes the dynamics of the surrounding air causing a rotating column of air to form, which in turn increases the flame height and burning rate of the fire. Despite the devastating power of fire whirls, relatively little is understood about their internal structure. In this research, we aim to address this though a combination of (small-scale) physical measurements and high fidelity numerical modelling using Large-eddy simulation (LES). The project aims at (i) using open source platforms to develop and validate an LES flow solvers for modelling this class of flow; (ii) identifying the combinations of causes that are required to form a fire whirl; (iii) establishing a framework for predicting the formation and movements of FWs at different topological and ambient conditions in open and closed spaces.

火旋风是一种强烈的和潜在的破坏性现象，在正确的条件下，它可以导致形成龙卷风状结构，即，从火中释放的热量改变了周围空气的动力学，导致形成旋转的空气柱，这又增加了火的火焰高度和燃烧速率。尽管火旋风具有毁灭性的力量，但人们对其内部结构的了解相对较少。在这项研究中，我们的目标是解决这一问题，虽然（小规模）的物理测量和高保真度的数值模拟使用大涡模拟（LES）的组合。该项目的目的是（i）使用开源平台开发和验证用于模拟此类流动的LES流动求解器;（ii）确定形成火旋风所需的原因组合;（iii）建立一个框架，用于预测开放和封闭空间中不同拓扑和环境条件下FW的形成和运动。