Smoke control in sloping tunnels

✍ Scribed by G.T. Atkinson; Y. Wu

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 291 KB
• Volume: 27
• Category: Article
• ISSN: 0379-7112
• DOI: 10.1016/s0379-7112(96)00061-6

✦ Synopsis

The critical velocity to prevent upstream smoke flow in the event of a tunnel fire is an important part of the design of emergency ventilation systems. For tunnels with a downhill slope the critical velocity is somewhat greater than for the corresponding horizontal tunnel. This note presents experimental results from a study involving model tunnels with slopes between 0 and 10 degrees. A general slope correction factor is derived from these results.