ANALISIS PENGARUH VARIASI JARAK AKSIAL STATOR TERHADAP PERFORMA ELECTRIC DUCTED FAN 195MM

• Main Author: Victor Yohanes, Marcellino
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66871
• Institution: Institut Teknologi Bandung

-Electric ducted fan (EDF) is a propulsion system that generates it’s thrust through a fan or rotor mounted within a cylindrical duct to maximize the rotor’s thrust, as well as to minizime the effects of tip loss on the rotor. Additionally, an EDF is also equipped with outlet guide vanes, or stator, aft of the fan, along with a nosecone and a tailcone as an extension of the fan’s hub casing. One of the most critical components within an EDF is the stator; a stator is designed to reduce the swirling effect of the air exiting the fan, thus maximizing the EDF’s thrust and efficiency, without unnecessarily raising the fan’s required power. This paper presents an investigation on the impact of rotor-stator axial distance to an EDF’s performance, through an analysis on a 195 mm EDF model with varying rotor-stator axial distance. The evaluation shall be conducted through computational fluid dynamics (CFD) simulations to obtain the EDF’s theoretical performance data, such as it’s thrust, the fan’s required power, as well as it’s efficiency. Thus, the relations between the value of the stator axial distance from the EDF’s rotor and the airflow characteristics exiting the EDF’s exhaust, along with the EDF’s general performance, can be further examined. It is found that the presence of stator blades reduces the swirl angle of the air exiting the EDF’s exhaust by 60.63%, while at the same time raising the thrust by 33.33%, raising it’s efficiency by 8.84%, and reduces the EDF’s required power by 0.76%. Additionally, it can be inferred that, in general, a larger axial distance between the stator and rotor reduces the EDF’s thrust and efficiency, while the EDF’s required power rises. However, it must be noted that the EDF’s efficiency reaches its peak if the axial distance between the stator and the rotor is added by 2.50% of the rotor’s diameter. This is due to the reduction in turbulent kinetic energy that is created along the stator blades in comparison to the baseline design, along with the stator blades’ greater effectiveness in reducing the swirl angle of the airflow in the exhaust in comparison to EDF models with larger stator axial distance.