Effect Of Rear Spoiler Inclination Angle On The Aerodynamic Performance Of Hatchback Model By Wind Tunnel

Sazali, Muhammad Hilmi (2017) Effect Of Rear Spoiler Inclination Angle On The Aerodynamic Performance Of Hatchback Model By Wind Tunnel. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

The aim of this project is to investigate the effect of strip-type and wing-type rear spoiler on inclination angle on the aerodynamic performance of hatchback model by wind tunnel and to fabricate Ahmed model with different angle of attack for strip-type and wing-type spoiler with slant angle of 35°.Scaled model of Ahmed body with 1:5 from original size and 35. of slant angle possess the blockage ratio of 0.0498 were fabricated using CubePro 30 printer along with strip-type and wing-type spoiler with different angle with the help of CATIA 3D software.Model are being tested inside MP 3300 wind tunnel with maximum velocity is at 35 m/s.Lift and drag coefficient were tested on different values of Reynold's number ranging from 144 x 103 until 505 x I 03 and spoiler angle of attack starting from 0 degree until 10 degree for strip-type spoiler and for wing-type until 20 degree with increment of 5 degree.This research will include the calculation for lift and drag along with Reynold's number.The result shows that as the angle of attack increase the lift coefficient increase until 10 degre and then rise at 15 degree and go back at 20 degree.Drag coefficient shows opposite to the lift coefficient.For Reynold's number,lift coefficient value increase for 0,5 and 20 degree but the other experience decrease as the Reynold's number increase and for drag coefficient tend to have constant value.High speed wind tunnels and use large model are recommended in order to improve the result of this research.

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