ON THE USE OF WATER-ICE JETS IN THE PURIFICATION OPERATIONS OF TURBINE UNITS
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- TITLE: ON THE USE OF WATER-ICE JETS IN THE PURIFICATION OPERATIONS OF TURBINE UNITS
- ABSTRACT: The paper deals with the use of water-jet means for cleaning operations of turbine units. To activate the process and improve the quality of purification, it is proposed to use a water-ice jet formed by mixing a water jet with a cryogenic liquid (liquid nitrogen). At the same time, the factors that influence the efficiency of ice formation, the size of ice floes and their ability to perform the work of destroying layers of pollution are analyzed. Models of formation of water-ice jet are developed and regularities of its influence on the surface are established. The influence of the conditions of formation of a water jet on its cleaning ability is revealed. It is shown that along with the flow of cryogenic fluid, in particular liquid nitrogen, the geometry of the mixing chamber has an important influence. Thus, the position of the point of introduction of nitrogen into the cavity of the chamber determines both the amount of ice formed and the size of the particles. The farther the nozzle slice, the larger the particle size of the ice forms. Fractograms of the generated ice flow were also obtained and their functional conditionality was determined by the modes of generation and the parameters of the mixing chamber. Multiple factorial planning of the experiment was performed and dependencies were obtained to establish technological modes of processing. Using surface model reproduction tools, it is shown that the use of water-iced jet not only improves the environmental friendliness of the method, but also provides the highest quality surface cleaning without changing the parameters of microgeometry.
- PAGES: 32-
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