Swept edge to reduce the noise generated by turbulent flow over the edge Available to Purchase

When turbulent fluid flows over an edge, swept at an angle α to the flow direction, it is shown from simple physical arguments that the radiated sound intensity can be reduced by at least a factor of cosα. The anticipated sound reduction depends on the assumption that the normal component of turbulent momentum convected over the edge is the dominant contributor to the edge interaction noise mechanism at high Reynolds numbers. Some preliminary experimental results which confirm the noise reduction are presented for a jet flowing over an edge swept in a sawtooth configuration.

Subject Classification: [43]28.65; [43]50.55.