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Discovery

Reducing Jet Noise by Controlling Turbulence

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Photo of Daniel Bodony, an assistant professor of aerospace engineering at UIUC.

Daniel Bodony, an assistant professor of aerospace engineering at the University of Illinois at Urbana-Champaign (UIUC).

Credit: Courtesy of Daniel Bodony, the University of Illinois at Urbana-Champaign (UIUC)


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Small, well-timed disturbances added to uncontrolled turbulent jet result in quiet, controlled jet.

Small, well-timed disturbances added to an uncontrolled Mach 1.3 turbulent jet (left) result in the quieter, controlled jet (right). Though only subtly different, the controlled jet is producing 30 percent less noise as visualized by the black-and-white contours of dilatation, a measure of air's compression rate. The sound-generating turbulence, as indicated by the vorticity, is shown as color.

Credit: Courtesy of Daniel Bodony, the University of Illinois at Urbana-Champaign (UIUC)


Download the high-resolution JPG version of the image. (183 KB)

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