Based on the idea of assembled structures,the longitudinal ventilation system of highway tunnel is compartmentalized modules with different functions. Under the language environment of Matlab,in terms of different ventilation project,the modules with correlative functions are transfered to compose together,it is achieved numerical simulation of selection and assessment of ventilation project and regulation and control in working status.
The ventilation project of Xuefengshan highway tunnel is calculated and analyzed by means of a computing program for the tunnel ventilation network which includes a processing module of traffic wind pressure, in consequence, the validity and the adaptability of the principle of calculation and the processing method of traffic wind in the ventilation network program are identified.
By simulating different fire conditions in an actual tunnel and analyzing the velocity and temperature field,the tunnel fire characteristics and smoke development laws can be understand comprehensively. So,the optimum ventilation plan to control fire smoke is raised and the theoretical basis is provided to determine the time and means to escape.
The investigations permit solving the most complex problem of ventilating highway tunnels - the selection of their ventilation scheme in accordance with the given calculation method and data of Tables 1 and 2.
Deviations from this location retard the removal of noxious gases from the face.4.A method is proposed for aerodynamic calculations of the combined ventilation scheme for the heading face of a tunnel.
Modeling air motion in a ventilated mine working with a flow-through ventilation scheme for the excavated section
Operable skylights or monitor glazing can provide the top outlet for a natural ventilation scheme that draws fresh air in through a lower aperture.
To enable the Local Authority Planning Department to assess the suitability of a ventilation scheme the following information should be provided.