Session: 05-01-04 Applied CFD

Paper Number: 60958

Start Time: August 11th, 12:50 PM

60958 - Parametric Study on Wing-Lambda-Shock Formation 

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 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, 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 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.

Presenting Author: Pattarasuda Chairach King Mongkut's Institute of Technology Ladkrabang

Authors:

Prasert Prapamonthon King Mongkut's Institute of Technology Ladkrabang
Pattarasuda Chairach King Mongkut's Institute of Technology Ladkrabang
Sirikorn Chainok King Mongkut's Institute of Technology Ladkrabang
Thanapol Rungroch King Mongkut's Institute of Technology Ladkrabang
Soemsak Yooyen King Mongkut's Institute of Technology Ladkrabang
Bo Yin Institute of Mechanics, Chinese Academy of Sciences
Guowei Yang Institute of Mechanics, Chinese Academy of Sciences
Shengjun Ju Institute of Mechanics, Chinese Academy of Sciences