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High-Fidelity Simulations of Transitional Flow Over Pitching Airfoils

Garmann, Daniel J.

Abstract Details

2010, MS, University of Cincinnati, Engineering : Aerospace Engineering.

Presented is a high-fidelity, computational study of transitional flow over an airfoil as it is pitched up from an initial zero incidence to 40 degrees at a nominally constant pitch rate, held, and then returned in a similar manner. The Reynolds numbers were chosen to bracket the regions of laminar and transitional flows applicable to prototypical micro air vehicle conditions, 5000 < Re < 40,000.

A high-order, implicit large eddy simulation technique was employed to show the degree of fidelity required to capture these highly transitional flows. Two-dimensional analyses examining the effects of Reynolds number and pitch rate were conducted and a discussion is provided. Additionally, the impact of transition and spanwise extent on the flowfield and force histories were explored through three-dimensional, spanwise periodic simulations. These simulations were shown qualitatively to compare extremely well with available experimental observations.

Paul Orkwis, PhD (Committee Chair)
Mark Turner, ScD (Committee Member)
Miguel Visbal, PhD (Committee Member)
95 p.

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Citations

  • Garmann, D. J. (2010). High-Fidelity Simulations of Transitional Flow Over Pitching Airfoils [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1276955868

    APA Style (7th edition)

  • Garmann, Daniel. High-Fidelity Simulations of Transitional Flow Over Pitching Airfoils. 2010. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1276955868.

    MLA Style (8th edition)

  • Garmann, Daniel. "High-Fidelity Simulations of Transitional Flow Over Pitching Airfoils." Master's thesis, University of Cincinnati, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1276955868

    Chicago Manual of Style (17th edition)