Natural Ventilating Behavior of Z-Shaped Pedestrian Underpass in Wuhan
In southern China, The moisture condensation is common in the urban underground facilities due to the humid and rainy climate. In order to reduce the maintenance costs the natural ventilation should be used in urban pedestrian underpass as far as possible. The planar layout of the underpass is very important for its ventilation effect so as to avoid condensation problem. Taking the Cuiliu street pedestrian underpass in city of Wuhan as a typical case, the field test was carried out in this paper on the Z-Shaped pedestrian underpass, and analyzed its ventilation effect by the computational fluid dynamic (CFD) numerical simulation. Results show that outcomes of the numerical simulation are close to the measured data, which verifies the reliability of simulation method. Thus Z-Shape is a good layout plan because of the better ventilation effect so that it can effectively prevent the moisture condensation for the urban pedestrian underpass even in moist environment.
KeywordsPedestrian underpass CFD Natural ventilation Moisture condensation
The research is supported by the Project for Building Science and Technology of Hu-bei Province, China (Grant Number 2013014), and the fifth phase of ‘333 project’ in Jiangsu Province of China (Grant No. BRA2016113).
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