Open AccessComparative study on the aerodynamic performance of airfoil with boundary layer trip of various geometrical shapes
Author(s) -
B. Sreejith,
A. Sathyabhama,
Sachin Kumar
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1854/1/012003
Subject(s) - airfoil , laminar flow , boundary layer , angle of attack , isosceles triangle , stall (fluid mechanics) , reynolds number , aerodynamics , chord (peer to peer) , relative wind , lift coefficient , flow separation , aerodynamic center , leading edge , mechanics , turbulence , aerospace engineering , geometry , mathematics , physics , engineering , computer science , distributed computing
Performance of small scale wind turbine (SSWT) and miniature aerial vehicles (MAV) is always effected with Laminar separation bubble. The problem of a laminar separation bubble on the upper surface of an E216 airfoil operated at low Reynolds number (Re=1) is investigated numerically. Incompressible steady two-dimensional simulation is carried out with Transition γ − Re θ turbulence model on the airfoil with a boundary layer trip (BLT). The performance of two different types of trips, namely, isosceles triangular (IT) and right-angled triangular (RA) is compared with that of the airfoil with a rectangular (RT) trip. The trip locations used are, 17% of the chord for location-1 and 10% of the chord for location-2 from the leading edge of the airfoil, while the trip heights selected are 0.3 mm, 0.5 mm, 0.7 mm, and 1 mm. Results showed that the boundary layer trip significantly affected the laminar separation and improved the aerodynamic performance of the airfoil. Maximum improvement in drag by 17.41% and corresponding lift to drag ratio by 10.86% are obtained for the isosceles trip at location-2 for the angle of attack of 6°. There is no observable advantage for isosceles and right-angled triangular trips over rectangular trips. Considering the geometrical complexity in fabrication, the rectangular trip is recommended.