<p>It is well-known that a wing is one of the most important parts of an aircraft as it is used to generate lift force. According to a wing moving at high subsonic speeds, the flow speed on the wing's upper surface can be supersonic due to acceleration through the curvature-created suction, thereby forming a shock wave in a lambda shape and causing its collapse. These phenomena can lead to flow separation, thus causing a negative effect on&nbsp;lift production. Therefore, a better understanding of the phenomena of wing-lambda-shock formation is essential. This study presents a numerical investigation of the lambda-shock formation on an ONERA M6 wing, which is known as a swept, semi-span wing with no twist, under effects of upstream total pressure, angle-of-attack (AOA), and free-stream Mach number, which is increased up to the supersonic region. The coefficients of pressure obtained by simulations are validated by open data. Then,&nbsp;numerical results in terms of the coefficient of pressure, Mach number, lift coefficient, and flow-field characteristics are discussed and presented for the wing-lambda-shock phenomena under an investigated range of the parameters. The present work fulfills the understanding of the phenomena of the lambda-shock formation and its collapse&nbsp;on swept wings that are also caused by two key factors viz the swept leading edge (LE) and the small curvature of an airfoil suction arc.</p>

Parametric Study on Wing-Lambda-Shock Formation

Paper Proceedings: https://asmedigitalcollection.asme.org/FEDSM/FEDSM2021/volume/85284

ASME 2021 Fluids Engineering Division Summer Meeting (FEDSM2021)

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.