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- W3204184633 abstract "High quality jet noise spectral data measured at the Aeroacoustic Propulsion Laboratory at the NASA Glenn Research Center is used to examine a number of jet noise scaling laws. Configurations considered in the present study consist of convergent and convergent-divergent axisymmetric nozzles. Following the work of Viswanathan, velocity power factors are estimated using a least squares fit on spectral power density as a function of jet temperature and observer angle. The regression parameters are scrutinized for their uncertainty within the desired confidence margins. As an immediate application of the velocity power laws, spectral density in supersonic jets are decomposed into their respective components attributed to the jet mixing noise and broadband shock associated noise. Subsequent application of the least squares method on the shock power intensity shows that the latter also scales with some power of the shock parameter. A modified shock parameter is defined in order to reduce the dependency of the regression factors on the nozzle design point within the uncertainty margins of the least squares method." @default.
- W3204184633 created "2021-10-11" @default.
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- W3204184633 date "2009-05-11" @default.
- W3204184633 modified "2023-09-28" @default.
- W3204184633 title "Development of Jet Noise Power Spectral Laws Using SHJAR Data" @default.
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- W3204184633 doi "https://doi.org/10.2514/6.2009-3378" @default.
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