Computation of transonic buffet

Spaine, V. (2005) Computation of transonic buffet. MSc(R) thesis, University of Glasgow.

Abstract

The computation of the unsteady aerodynamic phenomenon of buffet is becoming more feasible with the advent of faster computers and better numerical methods. This thesis is concerned with the computation of the Reynolds Average Navier-Stokes equations (RANS) in an attempt to further the understanding of the physics related to transonic buffet despite RANS being an approximation. The report concentrates on 2-dimensional (2-D) buffet of two supercritical aerofoils and comparisons of experimental and computational results are presented. Different turbulence models were employed in the computations. Results show that both steady and unsteady flow fields are heavily dependent on the turbulence models used. The two equation SST and Baseline models are found to be the most reliable models in predicting the onset of buffet. However, the Baseline model tends to over-predict the intensity of the buffet phenomenon. A comparison of various turbulence properties was made in order to explain why buffet occurs at certain angles of attack. Detailed time and grid refinement studies were also performed, although further grid refinement is necessary.

• Item Type: Thesis (MSc(R))
• Qualification Level: Masters
• Keywords: Aerospace engineering, mechanical engineering.
• Colleges/Schools: College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
• Supervisor's Name: Badcock, Prof. K.
• Date of Award: 2005
• Depositing User: Enlighten Team
• Unique ID: glathesis:2005-70958
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 08 May 2019 09:21
• Last Modified: 27 Aug 2021 13:28
• URI: https://theses.gla.ac.uk/id/eprint/70958