Numerical Simulation of Nonlinear Jet Noise Propagation

Measurement and Prediction of Noise Propagation from a High-Power Jet Aircraft

“…Although there were distinct similarities in the high-frequency rolloff trends for comparisons between predicted and measured spectra, there were notable differences as well. These differences were qualitatively confirmed in a similar comparison by Brouwer [10] that employed a different solution technique of the GMBE. Although the reasons for the discrepancies between the nonlinear model and the F/A-18E measurement are still not fully understood, it is believed that environmental and terrain effects significantly contributed to the differences between the experiment and the numerical model, which assumes free-field propagation through a quiescent atmosphere.…”

Modeling Far-field Acoustical Nonlinearity from F-35 Aircraft during Ground Run-up

“…9,10 The nonlinear propagation of noise has been numerically modeled using many algorithms and in many situations, including military aircraft. [11][12][13][14][15] was one of the first to attempt to predict nonlinear propagation of jet noise, followed by Morfey and Howell. 8 Predictions of nonlinear behavior have been shown for multiple aircraft, including the F-18, 17,18 F-22, 4,5 and F-35.…”

Near-field shock formation in noise propagation from a high-power jet aircraft

“…Early studies 1,2 of nonlinear propagation effects in noise radiated from full-scale supersonic jet engines have been extended recently [3][4][5][6][7][8][9] and include a far-field analysis of F-35A static run-up data. 10 Comparison of the measurements in Ref.…”