Forced vibration of a small vane located in the jet potential core is used to excite a two-dimensional turbulent jet. The experimental apparatus and the measuring techniques used to determine the mean flow and entrainment characteristics are described. At the streamwise measurement stations and test conditions, jet spreading and entrainment are found to increase significantly with increasing frequency and amplitude of vane oscillation over the steady jet values.
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Simmons et al. (1981) studied this question.
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