NASA Glenn Research Center and the Notre Dame Turbomachinery Laboratory (NDTL) are working together to understand and control broadband noise created by turbofan engines. The Advanced Noise Control Fan (ANCF) shown above (left) is an experimental facility with a 4-foot diameter fan that rotates at speeds up to 1800 RPM. The project objectives include the study and control of the broadband noise generated by the fan stage. Actuators have been placed on the fan’s stator (above right) with the intent of using active control to reduce noise observed in the far field.
Papers describing ANCF and results can be found here:
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By Mark H. Ross
Published by Jasmin Avila