Interactions between water-based fixed fire-fighting systems and longitudinal ventilation in road tunnels
type: CreativeWork
description: Notwithstanding well-developed tunnel ventilation strategies, devastating tunnel fire catastrophes have never been absent in past decades, ringing an alarm bell for the tunnel community about the inadequacy of the conventional fire-fighting systems. In such context, proposals have been made to add Water-based Fixed Fire-Fighting Systems (WFFFS) as auxiliaries of conventional ventilation systems because of their high efficiency in active fire suppression. To promote the development of the active fire-fighting systems in road tunnels, the recent two decades have seen a great effort put into full and small-scale experiments and numerical investigations. To date, the benefits of WFFFS, like reducing the fire size, cooling down the hot smoke and preventing fire spread, have been demonstrated, and its application is widely accepted. However, it is noticed most of these studies focused on specific tunnel conditions and only drew qualitative conclusions, causing the mechanisms behind the system interactions to be rarely reported and are therefore of concern when applying the findings to different cases. Moreover, there seemed to be a research preference for exploring the WFFFS advantages in the past decades, and the drawbacks they should bring about when interacting with the ventilation systems, such as smoke stratification destruction and air flow blocking, are yet to be clearly understood. This project aims to study the system interactions, including advantages and flaws, between WFFFS and the most used longitudinal ventilation system in road tunnels to achieve the most effective implementation of the coupled fire-fighting system. The system interactions are divided into on-fire and off-fire interactions, denoting categories with and without involving direct fire fighting effects, respectively. In the off-fire zone, the interactions focus on the impact of water spray on the air/smoke flow, covering the impacts of water spray on the stability of smoke stratification, the a…
abstract: Notwithstanding well-developed tunnel ventilation strategies, devastating tunnel fire catastrophes have never been absent in past decades, ringing an alarm bell for the tunnel community about the inadequacy of the conventional fire-fighting systems. In such context, proposals have been made to add Water-based Fixed Fire-Fighting Systems (WFFFS) as auxiliaries of conventional ventilation systems because of their high efficiency in active fire suppression. To promote the development of the active fire-fighting systems in road tunnels, the recent two decades have seen a great effort put into full and small-scale experiments and numerical investigations. To date, the benefits of WFFFS, like reducing the fire size, cooling down the hot smoke and preventing fire spread, have been demonstrated, and its application is widely accepted. However, it is noticed most of these studies focused on specific tunnel conditions and only drew qualitative conclusions, causing the mechanisms behind the system interactions to be rarely reported and are therefore of concern when applying the findings to different cases. Moreover, there seemed to be a research preference for exploring the WFFFS advantages in the past decades, and the drawbacks they should bring about when interacting with the ventilation systems, such as smoke stratification destruction and air flow blocking, are yet to be clearly understood. This project aims to study the system interactions, including advantages and flaws, between WFFFS and the most used longitudinal ventilation system in road tunnels to achieve the most effective implementation of the coupled fire-fighting system. The system interactions are divided into on-fire and off-fire interactions, denoting categories with and without involving direct fire fighting effects, respectively. In the off-fire zone, the interactions focus on the impact of water spray on the air/smoke flow, covering the impacts of water spray on the stability of smoke stratification, the a…
author: Deng, Tao
license: https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
date published: 2023
date modified: 2026-07-24T01:03:37Z
provider: University of Auckland
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: ResearchSpace@Auckland

PropertyValue
property ID: Handle
value: https://hdl.handle.net/2292/65523