A road tunnel ventilation system should be objectively graded taking into account both the installation efficiency of individual fans and the interaction between adjacent fans and consecutive fan sets. This can be a reason for reduced of installation efficiency penalties and excessively high installation prices. A comprehensive series of tests were carried out on a 1/10 scale model of a vehicle tunnel in order to investigate the effects of tunnel velocity, jet swirl, jet momentum, inclination and distances between jet axes and tunnel roof. To determine the effect on installation efficiency and on the interactions between fans mounted in series. Recommendations have been derived for the design and operation on the longitudinal ventilation system.
展开▼
