... the radially reduced designs. The study focuses on low flow rate operating points, necessitating the use of an Unsteady Reynolds Averaged Navier-Stokes (URANS) approach to analyse the flow. Detailed scrutiny of the flow field revealed a secondary flow feature in the diffuser passage which resulted in higher...

... speeds corresponding to approach, cutback, and sideline operating conditions, respectively. Unsteady Reynolds-averaged Navier–Stokes (URANS) approach is used. The in- and out-duct flow including the nacelle are considered in the numerical simulations, and results are compared against available...

..., the reversed-flow phase, the recovery phase, and the repressurization of the compressor flow. All of them are described, and focus is put on surge inception and the reversed-flow phase, as they induce greater risk for the mechanical integrity of the machine. high-pressure compressor deep surge URANS...

... , E. , and Thiele , F. , 2010 , “ URANS Simulations of Active Flow Control on Highly Loaded Turbomachinery Blades ,” Active Flow Control II (Notes on Numerical Fluid Mechanics and Multidisciplinary Design) , R. , King , ed., Springer , New York , Vol. 108 , pp. 203 – 219 . 12...