Aero-acoustic Measurement and Monitoring of Dynamic Pressure Fields

This innovative and practical measurement and monitoring system optimally defines dynamic pressure fields, including sound fields. It is based on passive acoustic tomography technologies. In contrast to most monitors it is unique in measuring absolute sound intensity magnitude at each location in the sound field. Most importantly, the measured noise source absolute intensity is specific to the generating mechanism/source. Intensity is independent of the monitored space; Source intensity of a generator is the same value in both free space and in hard, reverberant enclosure environments. Measured absolute intensities are transferable to other physical locations. In other words, experimental data is transportable and is directly applicable to any other real-world system or structures. The mesh or cell size used by the monitor/scanner is fixed by the physics of the noise generation mechanism, not by computer power considerations. The software can be run in a standard workstation, and with careful implementation of standard electronics can provide real time acoustic noise field monitoring. The AeroNoiseScanner [ANS] scanner is a natural extension and enhancement of an analytical and experimental program involving many decades of research and development programs and financial investments.

1) Increase productivity and utility of existing test facilities by measuring noise intensities directly without requiring anechoic treatments. 2) Measure and characterize the noise generation of rotorcraft blades using lagrangian frame of reference. 3) Provide noise intensity distribution and mapping to help calibrate, and focus and optimize CFD programs. 4) Characterize characteristics of jet engines, both near and far-field noise 5) Monitor and characterize engine internal exit characteristics with sensors mounted on engine cowls

1) Nuclear power steam generator performance monitoring and prognostics 2) Oil Industry industrial component monitoring for fault conditions and prognostics

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