Unstructured, High-Order Scheme Module with Low Dissipation Flux Difference Splitting for Noise Prediction, Phase I

The work proposed in this effort will advance the state-of-the-art of unstructured CFD technology not only for aeroacoustics problems but also in other areas such as high-lifting surfaces, airframe design and propulsion. The developed high-order and low dissipation unstructured CFD technology for noise source prediction can also be directly applied to several of NASA's multidisciplinary noise and vibration programs such as the prediction of noise mechanisms and propagation for engine, fan, duct, propellers, and airframes, and for the analysis of wake/frame interaction induced noise and vibrations. It can be used for the design of revolutionary aircraft with innovative configurations and technologies for minimum noise signature, and for the improvement of current aircraft noise performance. The FAA spends millions of dollars a year buying out homes, or making acoustic improvements to homes in accordance with FFA regulations. There is a huge market for efficient aeroacoustic analysis tools, which is driven by new aircraft, missile, and reusable launch vehicle design and by the need for multiple aeroacoustic analyses over time as a consequence of aircraft modifications and expanded/changing missions. These are important areas for defense contractors. The proposed technology provides a viable tool for several commercial applications such as wing-trailing vortex dynamics of large civil aircraft, analysis of noise generated by landing gear of civil aircraft, and others. The present high-order low-dissipation CFD technology is also applicable to a wide range of applications that involve embedded flow features requiring high resolution with limited grid size. Such applications include turbomachinery, cavitation, biomedical, electronic cooling, and many others. More »