Statistical analysis of vapor distribution in a cavitation flow based on an ensemble of instantaneous liquid velocity fields

A. S. Severin, M. V. Timoshevskiy, B. B. Ilyushin, K. S. Pervunin

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференциирецензирование

Аннотация

A new method was developed for statistical analysis of ensembles of instantaneous velocity fields measured by PIV in liquid (continuous phase) to determine the distribution of the vapor phase in cavitating flow. The method is based on two main principles: the absence of tracers used for PIV measurements in vapor, and the statistical independence of individual measurements. This allowed establishing an exponential dependence of repeatability of the vapor phase at a certain point of a cavitating flow. Compliance with this theoretical law was verified using the Pearson chi-square test. All theoretical distributions were divided into several groups depending on the time-averaged local vapor content calculated over the entire ensemble of realizations and the probability of a single event. As a result, dimensions of the stationary part of an attached cavity and the place of detachments of cloud cavities from the hydrofoil surface were determined using the new method of statistical analysis for an unsteady cloud cavitation regime.

Язык оригиналаанглийский
Номер статьи012046
ЖурналJournal of Physics: Conference Series
Том2119
Номер выпуска1
DOI
СостояниеОпубликовано - 15 дек 2021
Событие37th Siberian Thermophysical Seminar, STS 2021 - Novosibirsk, Российская Федерация
Продолжительность: 14 сен 202116 сен 2021

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ

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