Coherent structures and transition in the near wake of an airfoil

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The inherently unsteady flow past an airfoil is examined numerically for a wide spectrum of angles of attack, ranging from 0°to 45°and a transitional Reynolds number of 4,000 The numerical characteristics of the solutions obtained are investigated extensively in terms of accuracy and discretization dependence. Comparisons with available experimental data is very favorable for the accuracy of the simulations and further validate these results. The evolution of global parameters (like the time-averaged lift and drag of the section) with the increase of the angle of attack is presented, along with detailed visualisations of the flow field and time histories of corresponding quantities. Instability mechanisms that emerge as the angle of attack increases are identified and their contribution to the transitional nature of the flow is discussed. Rapidly fluctuating regions of the lift and drag time histories are correlated with these mechanisms, which are of a shear layer, high frequency nature.

Original languageEnglish
Title of host publicationProceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM)
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages1
ISBN (Print)0791819612
Publication statusPublished - 1999
Externally publishedYes
EventASME Fluids Engineering Division Summer Meeting (FEDSM) 1999 - San Francisco, United States of America
Duration: 18 Jul 199923 Jul 1999[author_s][]=ASME-JSME+Joint+Fluids+Engineering+Conference+%283rd+%3A+1999+%3A+San+Francisco%2C+Calif.%29 (Proceedings)


ConferenceASME Fluids Engineering Division Summer Meeting (FEDSM) 1999
Abbreviated titleFEDSM 1999
Country/TerritoryUnited States of America
CitySan Francisco
Internet address

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