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NDTL and NASA Collaborate to Study Broadband Noise Control

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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.…

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NDTL Advances Numerical Modeling of Turbulent Combustion

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The accurate and efficient simulation of combustion flows remains a significant challenge. Recent advancements in turbulence modeling and numerical algorithms at the Notre Dame Turbomachinery Laboratory (NDTL) have demonstrated promising new capabilities. The temperature contours shown above illustrate the Wavenumber Adaptive Simulation (WAS) method developed at NDTL as well as the solution from a traditional Large Eddy Simulation (LES). The WAS technique is a form of hybrid turbulence model that is both accurate and numerically efficient. Both simulations provided a similar level of resolution and accuracy, while the WAS required approximately half of the computational costs.

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