The Structure of Low-head Two Phase-flow in Flat Nozzles during Outflow of the Liquid into Rarefied Medium

摘要

Outcomes of experimental researches of the low-pressure adiabatic flow of the boiling liquid through two-dimensional Laval nozzles in a vacuum atmosphere are adduced. Requirements of critical conditions of flow are determined. Structural forms of a stream are investigated and their connection with crisis of flow is shown. It is established periodic non-stationary macrostructures of a stream which is stipulated by the rotational gear of origin of a vapor phase.