AVT-183 diamond wing flow field characteristics Part 2: Experimental analysis of leading-edge vortex formation and progression

作者：Hoevelmann Andreas; Grawunder Moritz; Buzica Andrei; Breitsamter Christian

来源：Aerospace Science and Technology, 2016, 57: 31-42.

DOI：10.1016/j.ast.2015.12.023

• Vortical flow
• Diamond wing
• Rounded leading edge
• Experiments
• Stereo PIV
• Hot-Wire Anemometry

Experimental flow field investigations are presented on a 53 degrees leading-edge sweep diamond wing configuration with rounded leading-edge contour. The analyses pertain to recent work that was conducted within the NATO Science and Technology Organization (STO) task group AVT-183 (Applied Vehicle Technology panel). The results obtained in a low-speed wind tunnel facility depict the overall aerodynamic characteristics as function of the angle of attack, and mean and turbulent flow field characteristics at one specific angle of attack, namely alpha = 12 degrees. Both Stereo Particle Image Velocimetry and Hot-Wire Anemometry are applied to detect the emerging flow phenomena in several chordwise sections including near-wall data. Details of the leading-edge vortex formation and progression are analyzed and discussed. Over almost the entire length of its existence, the leading-edge vortex is characterized by retarded axial flow, thus showing vortex bursting tendencies. The corresponding turbulent fluctuations show maxima close to the evolution of the leading-edge vortex and decrease towards the trailing edge. The observed flow separation onset and progression are significant for the AVT-183 diamond wing configuration, and more generally for a moderately-swept low-aspect-ratio wing with rounded leading edge contour. Following, the derived flow field characteristics provide a high-quality data base, which is suitable for general CFD validation.

• 出版日期2016-10