Numerical Simulation of Nonlinear Jet Noise Propagation

Author:

Brouwer Harry1

Affiliation:

1. National Aerospace Laboratory/NLR

Publisher

American Institute of Aeronautics and Astronautics

Reference15 articles.

1. (11) with f in Hz. With this function as input, a time signal was generated, using the procedure described above, with the following parameters: N = 216, fs= 216s-1, leading to a time record of 1 s, a frequency resolution of 1 Hz, and a maximum analysis frequency of 32768 Hz. The results for the simulated input PSD and the narrowband frequency spectrum of the simulated time signal are shown in Fig. 4, where the narrowband data have been averaged over 16 blocks of 2048 data, resulting in frequencybands of 'f = 16 Hz. The Overall Sound Pressure Level (OASPL) of the simulated timesignalis 148 dB, closetothemeasured result147 dB.

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