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Erschienen in:
2021 | OriginalPaper | Buchkapitel
Multiphase Modelling of Orifice Cavitation for Optimum Entrance Roundness
verfasst von : V. R. Greeshma, R. Miji Cherian
Erschienen in: Current Trends in Civil Engineering
Verlag: Springer Singapore
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Abstract
Cavitation is a common problem in pumps, control valves and orifices; causing serious wear, tear and damages. Under the wrong condition, cavitation reduces the components lifetime drastically. Cavitation occurs when local static pressure in a fluid reaches a level below the vapour pressure of the liquid at actual temperature. This work aims to study the cavitating flow through a circular orifice using computational fluid dynamics and to find out optimum shape of orifice in terms of entrance roundness to minimize cavitation. Fluid model of sharp-edged circular orifice is created in CFD, and the obtained result is compared with that of available experimental result. After calibration and validation, the fluid models created for circular orifice is modified for different entrance roundness values. The influence of entrance roundness on cavitation characteristics is analysed and the optimum value of entrance roundness for minimizing cavitation is obtained.