CFD를 이용한 Invisible Air vent의 공조성능 최적화

Air conditioning system in vehicle controls the temperature of cabin to provide driver a convenient and safe environment. Air vent, which is an important component of air conditioning system, controls air flow rate and flow direction. Manual control of air vent can cause unpleasant and dangerous situation while driving. To overcome these problems, invisible air vent was developed. Unlike conventional air vent, invisible air vent is composed of vent and cover. Besides its beautiful appearance, it is able to control the temperature of cabin more naturally than conventional system can do. However it was not easy to distribute flow to all direction. In this research, CFD analysis and optimization were performed to develop the performance of an invisible air vent system. Firstly, optimizing factors and those levels were selected using DOE and from this table CFD analyses were performed to find the optimized design. As a result, it was found that the inner angle of an air vent’s cover hole was the main factor of performance.