Abstract

Info

Title:: Numerical Simulation of Inhibition of Ammonia in Construction of Super Highrise Building

Author(s):: HE Ya-bo; WANG Hong-tao; TENG Xiu-xiu; ZHOU Ying; WANG Yang; School of Civil Engineering, Wuhan University

Keywords:: super high-rise building; ammonia; inhibition; CFD; numerical simulation

Abstract:: Aiming at the ammonia of typical air pollutant in construction of super highrise building, the threedimensional model of Wuhan center was constructed by using CFD method. The standard k-εcondition was simulated, and the whole effect on ammonia concentration and influence depths through two suppression measures of natural and mechanical ventilations were analyzed. The results show that the effect of mechanical ventilation on reducing the whole ammonia concentration is limited under steady state. The influence depth of a single air supply outlet is about 6.1 m along the direction of air supply, and 1.2 m perpendicular to the direction of air supply. The influence depth changes little with the wind velocity. The effect of natural ventilation on reducing the whole ammonia concentration is obvious, and the influence depth of air supply outlet is about 17.5 m. The increasing wind velocity with the height has obvious influence on ammonia concentration in initial 15 s, while the influence distance of natural ventilation increases limited with rising velocity under steady state. The natural ventilation is the mainly method to inhibit ammonia pollution in construction, and mechanical ventilation along with air deflector and other facilities can be used to improve the effect of mechanical ventilation after curtain wall construction.