Experimental Studies on the Air Curtain

Abstract

The first air curtain apparatus in Japan was installed several years ago. Since then, it has been used in places extensively with many practical experiences on its utility and performance, and a further wide range of application is promised. However, little has been studied concerning the operating principle and the performance of the air curtain, particularly, the effects of the outside wind and the outlet opening on the floor are fully taken into account. In this respect, comprehensive tests and analysis have been made so as to find how the air curtain is deflected and how much outdoor air blows into the room under various conditions of geometrical configuration of air curtain and outside wind velocity. As a result, general instructions for designing the air curtain have been made available, which are reported herein.