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Nonlinear Rotor Wake/Stator Interaction Computations

Martin Olausson (Institutionen för tillämpad mekanik, Strömningslära) ; Lars-Erik Eriksson (Institutionen för tillämpad mekanik, Strömningslära) ; Stephane Baralon
Proceedings of the 18th International Symposium on Air Breathing Engines (ISABE), Beijing, China, 2007 1307, (2007)
[Konferensbidrag, övrigt]

Rotor wake interactions with stators is an important aspect in turbomachinery noise generation. This paper deals with the time lagged periodic boundary condition (chorochronic periodicity) used in time domain Navier-Stokes equations solvers. The time lag periodic b.c. is used to solve the nonlinear three dimensional N-S equations using realizable k-epsilon turbulence model and time dependent wake defined at the inlet, with only a limited number of blade passages discretized. The time lag periodic b.c. has been validated through a number of 3D test cases. It has been shown that the use of a periodic/temporal damping term is an efficient way to stabilize the time lagged boundary condition without adding any extra spatial dissipation to the computation. The acoustic response from a stator vane with wakes defined at the inlet is presented.



Denna post skapades 2008-01-02. Senast ändrad 2010-12-16.
CPL Pubid: 64088