Research output: Contribution to journal › Article › peer-review
Experimental and numerical study of the cavitation surge passive control around a semi-circular leading-edge flat plate. / Kadivar, Ebrahim; Timoshevskiy, Mikhail V.; Pervunin, Konstantin S. et al.
In: Journal of Marine Science and Technology (Japan), Vol. 25, No. 4, 01.12.2020, p. 1010-1023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Experimental and numerical study of the cavitation surge passive control around a semi-circular leading-edge flat plate
AU - Kadivar, Ebrahim
AU - Timoshevskiy, Mikhail V.
AU - Pervunin, Konstantin S.
AU - Moctar, Ould el
N1 - Publisher Copyright: © 2019, The Japan Society of Naval Architects and Ocean Engineers (JASNAOE). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - In this paper, we performed the numerical and experimental study of unsteady cavitation surge around a semi-circular leading-edge flat plate using a passive flow control method. We mounted a miniature spanwise wedge-type vortex generator on the suction side of the model close to its leading edge. To mitigate the destructive impact of this type of cavitation on the hydrofoil performance, we analyzed the effects of the passive control on the dynamics of cavitation surge. First, we investigated experimentally the unsteady cavitating flow around the semi-circular leading-edge flat plate without passive control using high-speed visualization, acoustic measurements and particle image velocimetry method. Next, we simulated numerically the dynamics of unsteady flow under the cavitation surge conditions with an open source code and validated the numerical results using the experimental data. We used a proper interaction between turbulence and cavitation model to capture a highly unsteady behavior of cavitation surge. Finally, we considered the effects of the passive control device on the mechanism of the cavitation surge instability. Our results revealed that using the passive control method, it is possible to stabilize the attached cavity on the suction side of the flat plate, to hinder the development of the spanwise instability of the attached cavity and to mitigate large-scale cavity structures. Furthermore, high-pressure pulsations in the wake region induced by unsteady cavitation surge were considerably reduced.
AB - In this paper, we performed the numerical and experimental study of unsteady cavitation surge around a semi-circular leading-edge flat plate using a passive flow control method. We mounted a miniature spanwise wedge-type vortex generator on the suction side of the model close to its leading edge. To mitigate the destructive impact of this type of cavitation on the hydrofoil performance, we analyzed the effects of the passive control on the dynamics of cavitation surge. First, we investigated experimentally the unsteady cavitating flow around the semi-circular leading-edge flat plate without passive control using high-speed visualization, acoustic measurements and particle image velocimetry method. Next, we simulated numerically the dynamics of unsteady flow under the cavitation surge conditions with an open source code and validated the numerical results using the experimental data. We used a proper interaction between turbulence and cavitation model to capture a highly unsteady behavior of cavitation surge. Finally, we considered the effects of the passive control device on the mechanism of the cavitation surge instability. Our results revealed that using the passive control method, it is possible to stabilize the attached cavity on the suction side of the flat plate, to hinder the development of the spanwise instability of the attached cavity and to mitigate large-scale cavity structures. Furthermore, high-pressure pulsations in the wake region induced by unsteady cavitation surge were considerably reduced.
KW - Cavitating-bubble generators
KW - Cavitation passive control
KW - Cavitation surge
KW - Multiphase flow
KW - Semi-circular leading-edge flat plate
KW - INSTABILITY
KW - MECHANISM
KW - WALL ROUGHNESS
KW - MODEL
KW - AVERAGED NAVIER-STOKES
KW - SIMULATION
KW - FLOW
KW - HIGH-SPEED VISUALIZATION
KW - DYNAMICS
KW - TURBULENCE
UR - http://www.scopus.com/inward/record.url?scp=85075904451&partnerID=8YFLogxK
U2 - 10.1007/s00773-019-00697-2
DO - 10.1007/s00773-019-00697-2
M3 - Article
AN - SCOPUS:85075904451
VL - 25
SP - 1010
EP - 1023
JO - Journal of Marine Science and Technology (Japan)
JF - Journal of Marine Science and Technology (Japan)
SN - 0948-4280
IS - 4
ER -
ID: 22547002