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- W2918595087 abstract "This article presents unsteady wall pressure measurements from a low-speed, low-solidity rotor operating in a circular duct. A circular microphone array was placed within the duct downstream of the rotor to record the unsteady surface pressure. These data were decomposed into spatial modes and then further decomposed into hydrodynamic and acoustic pressure fluctuations. The acoustic pressure was then further separated into the acoustic source function and an acoustic transfer function. The acoustic source function from the rotor compared well with a previous formulation for turbulence interaction noise. The transfer function showed a complicated relationship with frequency, with significant local maxima and minima. These features of the duct acoustics were studied using a simplified Green's function type approach, using the method of images to represent the duct end effects. The simple analytical method was able to capture many of the detailed features of the measurements with qualitative agreement." @default.
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- W2918595087 date "2019-07-01" @default.
- W2918595087 modified "2023-10-18" @default.
- W2918595087 title "Experiments and analysis of the internal wall pressure of a ducted rotor" @default.
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- W2918595087 doi "https://doi.org/10.1016/j.jsv.2018.12.026" @default.
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