Abstract
A brief review was conducted of the most significant results of studies performed at the Institute of Mechanics of Moscow State University regarding a new class of unsteady flow of incompressible fluid. Examples include such fluids arising upon the penetration of vertical submerged or free flat and axially symmetric water jets through the surface of water in relatively narrow channels, such as when free thin-walled water jets flowing from a conical slit nozzle with a vertical axis form in a rectangular vessel. A broad range of values of characteristic parameters was found to be generated by the previously unknown self-oscillating flow modes formed in the liquid. Different mechanisms for the occurrence of such modes and characteristics of the dependencies of the self-oscillation period on the main determining parameters were uncovered through empirical experiment and numerical modeling. These mechanisms and characteristics as well as possible applications of the obtained results are presented.
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