The diskette contains two computer programs relating to the design and operation of highway tunnel ventilation systems. The TUNVEN program solves the coupled one dimensional steady state tunnel aerodynamics and advection equations to obtain the longitudinal air velocities and pollutant concentrations for a given tunnel design, traffic load and ventilation rate. The effect of ambient conditions external to the tunnel such as portal winds and local pollutant levels can also be included. The program can be used to determine ventilation requirements for natural, longitudinal, semi-transverse and transverse ventilation systems. The DUCT program calculates the air flow through the individual ports connecting the ventilation duct to the roadway in a semi-transverse ventilation system. It can be used to design a port or to determine the flow pattern through a set of existing ports under off-design conditions. The development of these programs by the study 'The Management of Air Quality In and Near Highway Tunnels' is discussed in the final report 'Aerodynamics and Air Quality Management of Highway Tunnels' (PB80-143803).


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    Title :

    TUNVEN and DUCT Programs (for Microcomputers)


    Publication date :

    1991


    Size :

    pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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