Flow Characteristics of Blunt-Edge Delta Wing

Description

This book presents the current knowledge on the aerodynamic properties above blunt leading-edge delta wing. The flow on sharp-edge delta wing is dominated by a pair of primary vortex developed in the leading edge of the wing. The primary vortex of the wing is initiated at the leading edge of the wing. The flow on the blunt-edge delta wing exhibits different flow characteristics and more complicated. The flow in the front part of wing is governed by attached non-separated flow. The original VFE-2 wing has 4 sets of interchangeable leading-edge profile namely sharp-edged, small-edged, medium-edged and large-edged ratio. Within VFE-2 campaign, several state of the arts data were published and one of them was the discovery of another vortex called as inner vortex. A similar VFE model has been fabricated in UTM for further analysis flow characteristics of blunt-edges delta wing. This book presents the current data on a blunt edge delta wing tested in UTM Aerolab. The experiments were carried out at speed of 18, 36 and 54 m/s representing Reynolds numbers of 1× 106, 2× 106 and 3× 106. Two measurement techniques were employed on the wing, ie steady balance and surface pressure measurements. Several important observations were noted on the blunt-edge wing; ie the development of primary vortex has been delayed and the vortex breakdown occurred further aft of the wing. The results here provide a better insight into the leading-edge effect on the flow topology above the blunt-edged delta wing.