Numerical Simulation On Air Distribution In Super Large Space Underground Building

The super large space studied in this paper is used in shipping maintenance mainly. Because that its bottom is full of sea water, the indoor humidity is relatively large. In order to protect various kinds of mechanical equipments, redundant humidity in the air must be removed. The distributions of given new wind inside the indoor have great relations with air-flow organization. Reasonable air-flow organization has ideal dehumidification effects. The influences of the arrangement method of delivery conduit and state parameters of delivery wind on the temperature and velocity distributions inside the super large space were investigated through the method of numerical simulation, which provides theoretical provident for optimum design of humidifying and air conditioning equipments inside the super large space.The mathematical model and simplified physical model of super large space and evaporating surface were derived through the theoretical analysis. Reasonable simulation schemes were obtained and air-flow organizations were simulated by using fluid mechanic software. The influences of different air-flow organization format, the location and shape of supply-air outlet, the area of supply-air outlet and the velocity of supplied air as well as the other factors on the temperature and velocity distribution inside the working domains were investigated. Through the analysis, the method of middle deliver and upper back of air-flow organization should be used inside the super large space. Supply-air outlet is the flat with the dimension of 400mm* 100mm, which is 2mm higher than passage. The horizontal direction keep the distance of 8m and supply-air velocity is 6.6m/s.This research production is applied to the design of humidifying and air conditioning system inside the super large space of some underground. The numerical results can be compared very well with the experimental data. Each index mark reaches designed need, which solves a large puzzle of humidifying and air conditioning system inside the super large space of some underground.