Transonic airfoil buffet at high Reynolds number by using wall-modeled large-eddy simulation

Yuma Fukushima, Soshi Kawai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, a wall-modeled large-eddy simulation (WMLES) of transonic buffet phenomena over an OAT15A supercritical airfoil at high Reynolds number is conducted. By using the WMLES, the buffet onset is successfully predicted. The small separation near a trailing edge is also accurately estimated with buffet phenomena. The flow physics of buffet flow are investigated from the results. As a results, it is confirmed that there are dominant phenomena in low and high frequency band. By using the phase average operation, large-scale vortical structures with low frequency band and acoustic waves generated from the trailing edge are identified. At last, we propose the new self-sustained oscillation model which depends on the pressure ratio forward and backward of the shock wave. The possibility of the proposed model is confirmed from the results.

Original languageEnglish
Title of host publication10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PublisherInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP10
ISBN (Electronic)9780000000002
Publication statusPublished - 2017
Event10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 - Chicago, United States
Duration: 2017 Jul 62017 Jul 9

Publication series

Name10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Volume2

Other

Other10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Country/TerritoryUnited States
CityChicago
Period17/7/617/7/9

ASJC Scopus subject areas

  • Atmospheric Science
  • Aerospace Engineering

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