longitudinal ventilation fan activation time, fire size and the type of burning materials on tunnel tenability was investigated based on variations of two primary scenarios: Scenario #1 assumed a 15 MW fire at the front end of a train, and Scenario #2 assumed a 15 MW fire at the rear of ...
The worst scenario was identified to be that pertaining to the petrol tanker and more critical conditions were also found when the tunnel was full of vehicles. The maximum gas temperatures reached in the presence of traffic at the side wall (and at the tunnel ceiling reported in brackets) ...
If the module isn't present, the tool stops on the ip_tables module check. In this scenario, you can run the following commands to manually load the module. Manually load the ip_tables module In the context of sudo, run the following commands on your Linux server: ...
5 (b) also show the velocity vector of the vertical cross-section along the tunnel in the longitudinal direction for two typical fire locations. Compared with the scenario for fire located at Position 1, an obvious vortex occurs at the lower side as the smoke spreads toward the fire source ...
[4], using layered finite beam elements for the discretization of the lining, allowing consideration of spalling by deactivation of layers following a prespecified spalling scenario. Sakkas et al. [5] presented the fire assessment of a cut & cover tunnel, using finite element analysis and for ...
were performed to refine the smoke layer prediction of FDS, especially on backflow (i.e., a reversed smoke flow near the ceiling). Also, energy conservation was checked for this scenario in FDS. A simple guideline is given for smoke layer simulations using FDS for similar tunnel fire ...
Scenario: point-to-point Remote address: 1.1.3.1 Authentication mode: PSK authentication PSK: YsHsjx_202206 Local ID type: IP address Peer ID: any peer ID NAT configuration Name: policy_nat1 Source IP address: 10.1.2.0/24 Destination IP address: 10.1.1.0/24 Destination IP address: 10.1.3.0...
Application of the tunnel fire scenario dynamic reconstruction based on Intelligent Disaster Prevention Platform in Shanghai Effective evacuation and fire-fighting response require an accurate, prompt and dynamic reconstruction and visualization of tunnel fire scenarios. This paper aims to introduce the appli...
d1. Moreover, in the scenario of subcritical ventilation, the steady-state reduced gravity increases with the source buoyancy flux and the ventilation pressure. Compared with critical ventilation shown in Fig. 3(a), the reduced gravity in Fig. 5(c) is much larger, which quantitatively ...
The design fire scenario and criteria for tenability and time of tenability shall be established as part of the analytical approach. Both Norway and Sweden apply the self-rescue principle (which could be seen as a safety constraint), however a difference is that in Sweden a design criterion ...