Aeroacoustics of Rounded Forward-Facing Steps: Near-Field Behavior

What is it about?

The corner of forward-facing steps in engineering designs are often rounded for structural reasons and the influence of this rounding on wall pressure and radiated noise remains unknown. This study characterizes, in detail, the fluctuating wall pressure field induced by unrounded and rounded forward-facing steps. It is shown that the wall pressure field for steps with a corner rounding radius of 12.5% the step height, or less, is similar and can be scaled. However, when the corner is rounded with a radius of 25% the step height, the flow-field and the wall pressure characteristics change significantly.

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