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Wind Effects on Air Curtain Aerodynamics Performance

Title:

Wind Effects on Air Curtain Aerodynamics Performance

Yang, Senwen (2018) Wind Effects on Air Curtain Aerodynamics Performance. Masters thesis, Concordia University.

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Abstract

Air curtains are widely used in various building types to reduce infiltration and associated energy losses through building entrances. Quantifying the infiltration rate through a building entrance is directly related to the evaluation of the energy performance of air curtains. Consequently, many previous studies identify and measure the impacts of various factors on performance, including door operation, usage frequency and air supply angle and velocity. However, to date limited studies have focused on the effect of wind on air curtain performance, even though wind is commonly considered to play an important role. The purpose of this research is to identify wind effects on the performance of air curtains through an experimental study, taking into account parameters including wind speed and angle, air curtain supply flow speed and supply flow angle, and the pressure difference acting across an air curtain. The relation between air infiltration and the pressure difference across an air curtain with and without wind is analyzed. Experiments are conducted in a large chamber equipped with an air curtain and a corresponding sub-scaled model in the wind tunnel. The results from differing wind speeds and air curtain supplies from both experiments are subsequently compared, and the wind effects in both cases are found to be consistent. This study finds the following: when the air curtain jet is able to reach the floor, thus providing a good sealing of the door, it can effectively resist the wind; a strong wind blowing directly towards the air curtain reduces its performance; and the performance is related to both wind speed and wind incident angle.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (Masters)
Authors:Yang, Senwen
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Building Engineering
Date:July 2018
Thesis Supervisor(s):Wang, Liangzhu (Leon) and Stathopoulos, Theodore
Keywords:air curtain; wind effects; building entrance; infiltration; particle image velocimetry
ID Code:984024
Deposited By: Senwen Yang
Deposited On:16 Nov 2018 15:52
Last Modified:16 Nov 2018 15:52

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