Akademik Veri Yönetim Sistemi
17th international conference of young scientists on energy and natural sciences issues , Kaunas, Litvanya, 24 - 28 Mayıs 2021, ss.1-7, (Tam Metin Bildiri)
An experimental study is carried out
to investigate aerodynamic characteristics of NACA 0015 airfoil having different
aspect ratio with the endplates. The aspect ratio (AR) is varied between 1 and
4 with an increment of 1. AR of the airfoil is the ratio of spanwise length to
mean chord. Lift and drag forces are measured with the help of a six-axis load
cell on the flow around NACA 0015 airfoil at Re= 7x104 and 1.1x105.
This airfoil has a chord of 115 mm and a spanwise of 115 mm, 230 mm, 345 mm,
and 460 mm. Force measurement results reveal that lift curves are significantly
varied with increasing aspect ratio. Optimum L/D,
indicating the aerodynamic performance of the airfoil, is obtained with
aspect ratio of 4 at
Re= 7x104 and 1.1x105. Stall angles for AR4, AR3,
AR2, and AR1 are α = 10°, 11°, 12°, and 26°, repectively. Results indicates
that the lift coeffecient performance enhances with increasing aspect ratios
from 1 to 4 and stall angle significantly postpone with decreasing aspect ratios
from 4 to 1.