This work presents measurements of the dynamic and mean pressure distributions on the stator wall of a 50% eccentric whirling annular seal for three different pre-swirl conditions: −45, 0 and +45 degrees and two flow cases, Taylor number of 6,600/Reynolds number of 12,000 and Taylor number of 3,300/Reynolds number of 24,000. A data reduction calculation of the forces and moments generated by the pressure field has been performed, and a description of the effect of swirl on the pressure field has been presented.

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