Tomography Systems and Sensor Applications Flow Visualization Above Blunt Edged Delta Wing

Nurulhuda Tajuddin, Shabudin Mat, Mazuriah Said

Abstract

This paper highlights the flow characteristics of the VFE2 blunt-edged delta wing profile by using flow visualization method. On the upper surface of the wing, a phenomenon called as vortex is developed and the flow physics in that region is very complicated. The vortex flow on the sharp-edged wing develops in the Apex region of the wing. The vortex on the blunt-edged wing is not developed in the apex region but at a certain cord-wise position based on angle of attack, Reynolds number and leading edge bluntness. The primary vortex moved upstream if the angle of attack is increased. This study has been performed in order to verify either the primary vortex developed in the apex region for the blunt-edged wing if the angle of attack is increased. The experiments were conducted at Universiti Teknologi Malaysia Low Speed Tunnel (UTM-LST) with maximum speed of 83 m/s. A measurement technique called it as tuft method was used to verify the complexity of the flow at high angle of attack. The experiments were performed at Reynolds number of 1×106 and 2×106 respectively. The result shows that the primary moves upstream closed the apex at high angles of attack.