High Order LES For Supersonic Ramp Flow Control With MVG

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High Order LES For Supersonic Ramp Flow Control With MVG

Show simple item record Yan, Yonghua en_US 2012-07-25T19:09:46Z 2012-07-25T19:09:46Z 2012-07-25 January 2012 en_US
dc.identifier.other DISS-11696 en_US
dc.description.abstract An implicitly implemented large eddy simulation by using the fifth order bandwidth-optimized WENO scheme is applied to make comprehensive studies on ramp flows with and without control at Mach 2.5 and Re=5760. Flow control in the form of microramp vortex generators (MVG) is applied. The results show that MVG can distinctly reduce the separation zone at the ramp corner and lower the boundary layer shape factor under the condition of the computation. A series of new findings are obtained about the MVG-ramp flow including the three-dimensional vortex structure generated by MVG. The mechanism about the formation vortex ring structure and its interaction with shock wave at the ramp corner is deeply studied. Vortex rings strongly interact with the flow and play an important role in the separation zone reduction. It shows that the ring structure does not break down and keeps it topology after penetrating the strong shock wave and the oblique shocks is influenced a lot by the induced flow field from rings. The bump of the 3D shock wave surface is discovered and its mechanism is explained. en_US
dc.description.sponsorship Liu, Chaoqun en_US
dc.language.iso en en_US
dc.publisher Mathematics en_US
dc.title High Order LES For Supersonic Ramp Flow Control With MVG en_US
dc.type Ph.D. en_US
dc.contributor.committeeChair Liu, Chaoqun en_US Mathematics en_US Mathematics en_US University of Texas at Arlington en_US doctoral en_US Ph.D. en_US

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