Abstract
New small disturbance compressor face boundary condition that models the unsteady interactions of acoustic disturbances with an axial compressor is presented. The new small disturbance boundary condition is formulated to correct the deficiencies associated with the Paynter small disturbance model. This boundary condition is implemented in onedimensional and axisymmetric turbulent flow models of the inlet/compressor experiment at the University of Cincinnati. Acoustic reflections from the compressor face boundary conditions are compared against the measured experimental reflection characteristics of the axial compressor. The performance of the boundary conditions is also compared against existing boundary conditions such as the Paynter small disturbance boundary condition. These comparisons show that the new small disturbance boundary condition provides the best accuracy in terms of the prediction of the reflected disturbance from the interaction of an acoustic disturbance with a compressor.
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