Experiments on sound radiation due to non-linear interaction of instability waves in a turbulent jet
摘要：
A turbulent circular jet was excited at two frequencies ( f 1, f 2) and the pressure on the axis of the jet as well as in the far field was measured. The frequency components of the pressure at the combination frequencies f 1 f 2, f 1 + f 2, 2 f 1 f 2, 2 f 2 f 1, exhibit wave-like character in the near field, and a distinct directivity in the far field. The sound radiation at the difference frequency predominates over the other combination frequencies. A non-linear wave-guide model of the large structures of the turbulence is outlined.
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关键词：
Theoretical or Mathematical/ acoustic noise jets nonlinear acoustics/ sound radiation instability waves turbulent jet nonlinear interaction/ A4350 Acoustic noise, its effects and control A4725M Noise (turbulence generated)
DOI：
10.1016/0022-460X(79)90561-3
被引量：
年份：
1979
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