An improved turbulent boundary layer inflow condition, applied to the simulation of jets in cross-flow
Jewkes, James (2008) An improved turbulent boundary layer inflow condition, applied to the simulation of jets in cross-flow. PhD thesis, University of Warwick.
WRAP_THESIS_Jewkes_2008.pdf - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Official URL: http://webcat.warwick.ac.uk/record=b2248417~S9
The jet acting perpendicular to a cross-flow boundary layer is a commonly studied complex turbulent flow. Our research was motivated by their potential application in separation delay devices, where jets can be used to produce streamwise vortices in a similar manner to conventional solid vortex generating vanes.
This thesis addresses two problems; firstly the generation of inflow conditions for the simulation of a spatially developing turbulent boundary layer, and secondly the simulation of low velocity ratio jets interacting with the boundary layer. Our approach involved refining a popular turbulent inflow generation technique, validating the accuracy of our improved method against well established direct numerical simulation data. This turbulent boundary layer was used to simulate a low velocity ratio perpendicular jet test-case, which was validated against experimental data. Finally, a pitched and skewed jet model was investigated.
Our modifications to the turbulent boundary layer inflow generation method were successful, addressing problems described by various authors regarding the stability and accuracy of the technique. Secondly we have found excellent agreement in our perpendicular jet in cross flow test-case, and have produced what we believe to be the first documented unsteady numerical simulation of the flow field behind a low velocity ratio pitched and skewed jet.
|Item Type:||Thesis or Dissertation (PhD)|
|Subjects:||Q Science > QA Mathematics
T Technology > TL Motor vehicles. Aeronautics. Astronautics
|Library of Congress Subject Headings (LCSH):||Turbulent boundary layer -- Research, Aerodynamics -- Research, Jets -- Fluid dynamics, Cross-flow (Aerodynamics)|
|Official Date:||April 2008|
|Institution:||University of Warwick|
|Theses Department:||School of Engineering|
|Supervisor(s)/Advisor:||Carpenter, P. W. (Peter William), 1942- ; Chung, Yongmann|
|Sponsors:||Fifth Framework Programme (European Commission) (FFP) (G4RD-CT-2002-00748)|
|Format of File:|
|Extent:||209 leaves : ill., charts|
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