COMPARISON OF SUKHOI T-50 PAK-FA AND F-22 RAPTOR-LIKE FIGHTERS MODEL FLOW VISUALIZATION USING GAMA WATER TUNNEL
Penulis/Author
Prof. Ir. Sutrisno, MSME., Ph.D., IPM., ASEAN Eng. (1); Dr. Setyawan Bekti Wibowo, S.T., M.Eng. (2); Sigit Iswahyudi (3); DAVID FERNANDO S (4)
Tanggal/Date
19 2019
Kata Kunci/Keyword
Abstrak/Abstract
Comparison of Sukhoi T-50 PAK-FA and F-22 Raptor-like fighters’ model flow
visualization were investigated using water tunnel. Flow visualization testing used a
water tunnel because it could reveal the vortex dynamics phenomenon easily visually.
The vortex dynamics and the performance of both fighters were examined at 0.1 m/s
test section flow. The test used Reynolds number 6.577 x 103
on a 1: 100 scale model.
Testing was conducted at varying the angle of attack of 0° - 60°. The flow
visualization was measured using dye injection method. The result of the research
using GAMA water tunnel showed the aerodynamic force and vortex dynamics
phenomenon that showed the difference in lift and drag coefficients. The results of this
visualization showed the formation of vortex nuclei that occur in the wings of the
aircraft model. The vortex core was a source of lift in delta type aircraft. The
influence of rolled-up vortex would form the central part as a vortex core which had
very low pressure so that it functions as the formation of lift force. Visualizing the
vortex core was characterized by the formation of an ink injection line until the ink broke or damaged the flow. The highest lift coefficient occurred on both models about
1.18 on the angle of attack of 40° for F22 Raptor and PAK-FA T-50 model at AoA 45o
