TY - JOUR

T1 - Statistical analysis of vapor distribution in a cavitation flow based on an ensemble of instantaneous liquid velocity fields

AU - Severin, A. S.

AU - Timoshevskiy, M. V.

AU - Ilyushin, B. B.

AU - Pervunin, K. S.

N1 - Funding Information: The statistical analysis of the velocity fields was performed with funding from the Russian Science Foundation (Project No. 19-79-30075). The experiment on the cavitating hydrofoil was carried out with financial support under a state contract with IT SB RAS. Publisher Copyright: © 2021 Institute of Physics Publishing. All rights reserved.

PY - 2021/12/15

Y1 - 2021/12/15

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85123589719&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/2119/1/012046

DO - 10.1088/1742-6596/2119/1/012046

M3 - Conference article

AN - SCOPUS:85123589719

VL - 2119

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012046

T2 - 37th Siberian Thermophysical Seminar, STS 2021

Y2 - 14 September 2021 through 16 September 2021

ER -