Simulation and measurement of road tunnel ventilation

Natural Ventilation in Buildings: Measurement in a Wind Tunnel and Numerical Simulation with Large Eddy Simulation

Yi Jiang, Donald Alexander, Huw Jenkins, Rob Arthur, Qingyan Chen*, Building Technology Program, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, MA 02139-4307 Welsh School of Architecture, Cardiff University, Bute Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK School of Mechanical Engineering, Purdue University, 1288 Mechanical Engineering Building, West...

Application of fuzzy control to a road tunnel ventilation system

On-road and wind-tunnel measurement of motorcycle helmet noise.

The noise source mechanisms involved in motorcycling include various aerodynamic sources and engine noise. The problem of noise source identification requires extensive data acquisition of a type and level that have not previously been applied. Data acquisition on track and on road are problematic due to rider safety constraints and the portability of appropriate instrumentation. One way to add...

The critical ventilation velocity in tunnel fires—a computer simulation

In ventilated tunnel fires, smoke and hot combustion products may form a layer near the ceiling and flow in the direction opposite to the ventilation stream. The existence of this reverse stratified flow has an important bearing on fire fighting and evacuation of underground mine roadways, tunnels and building corridors. In the present study, conducted by the National Institute for Occupational...

Numerical simulation of water entry of tunnel cross section with different deadrise angles and tunnel radiuses

This study deals with the numerical modeling of symmetrical water entry of tunneled sections. In this study, firstly, the water entry problem of a wedge section without tunnel in four different deadrise angles was numerically modeled. The obtained results related to the pressure distribution on these sections and the maximum pressure have been compared with the experiment results. In the next s...