This thesis is focused on understanding the flow features associated with a Switched Vortex Valve (SVV) using Computational Fluid Dynamics (CFD) methods for application in aero-engines. In this research the major emphasis was put on detailed flow analysis which was limited in experimental studies of SVVs. Considering the complex geometry of the SVV, for simplicity it was decided to divide the SVV device into two parts before studying the device as whole. These parts are the vortex chamber and flow switching device, which together constitute the SVV device. In this research, different turbulence models were evaluated which are mainly Reynolds average Navier-Stokes (RANS) and unsteady Reynolds average NavierStokes (URANS). The different turbulence models are the k- , SA and the RSM, and for a test case LES was also implemented.
A thesis submitted in fulfilment of the requirements
for the degree of Doctor of Philosophy
Thermo-Fluids Systems UTC
Department of Mechanical Engineering Sciences
University of Surrey
This research work has been funded by the Rolls-Royce plc. and the Engineering
and Physical Sciences Research Council of the United Kingdom through the
University of Surrey Postgraduate Studentship award.