STUDI NUMERIK EFEK PERBANDINGAN PENAMBAHAN WINGTIP FENCE DAN BLENDED WINGLET TERHADAP PERFORMA AEORODINAMIKA AIRFOIL NACA 23018
ABSTRACT: Winglet is one of
the devices in airplane wing that allows wing performances without widening the
wingspan. It serves to damp the vortex flow at the ends of the wing where the
airflow coincide that produce turbulence. The air loop requires more energy in
the plane to make stable in the air, so it definitely wasteful of fuel. Based
on the pilot experience, winglet in the plane can save fuel consumption by 7%
that is a huge amount of the percentage to travel in a long way. This study conducts
numerical simulation using simulation software with turbulent model of k-ε
realizable. The free stream of fluid flow is determined as 40 m/s (Re = 5 x 10
6 ) with angle of attack (α) = 0 o , 5 o , 10 o and 15 o . Airfoil NACA 23018
is used as specimen test applied with or without winglet. Wingtip fence with
variations of forward, rearward and blended is designed as the winglet. The
results show that adding winglet can reduce the vorticity magnitude in rear
wing. Moreover, it can also increase the aerodynamic performances by increasing
maximum C L /C D both in forward and rearward wingtip fence and also in blended
winglet. The pressure distribution in the winglet model shows gradually increasing
in the lower surface compared with plain wing.
Penulis: Setyo Hariyadi S.P
Kode Jurnal: jptmesindd160331