Answers are grounded in this paper and cite their sources.
A nozzle development program was undertaken to produce a time-dependent flow at the nozzle exit. The oscillatory character of the flow was achieved without the use of moving parts by incorporating a fluidic feedback loop into the nozzle design. The nozzle thrust efficiencies approached 90% and the half-width spreading rates attained exceeded that of the slot nozzle by a factor of more than three.
No takes yet. Share an insight, caveat, or question.
Hermann Viets (1975) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: