Study on cavitation flow characteristics based on dynamic mode decomposition

ZHANG Ruihan, LI Kailin, LIU Gang, HAO Zongrui

Journal of Qilu University of Technology ›› 2025, Vol. 39 ›› Issue (1) : 1-8.

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Journal of Qilu University of Technology ›› 2025, Vol. 39 ›› Issue (1) : 1-8. DOI: 10.16442/j.cnki.qlgydxxb.2025.01.001
Mechatronics engineering and information engineering

Study on cavitation flow characteristics based on dynamic mode decomposition

  • ZHANG Ruihan,LI Kailin,LIU Gang,HAO Zongrui*
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Abstract

Hydrodynamic cavitation technology is gradually gaining widespread application,and the accurate and efficient extraction of structural characteristics of cavitation clouds contributes to a better understanding of the internal mechanisms of cavitation.In this study,high-speed imaging experiments were conducted to reveal the characteristics of cavitation phenomena within a jet oscillator through grayscale value analysis.Additionally,the dynamic mode decomposition method(DMD) was employed to conduct an in-depth exploration of the transient flow field inside the oscillator,investigating the coherent structures and frequency characteristics of cavitation clouds within the oscillator.Furthermore,different dominant structures were extracted,and the overall cyclic dynamics relationship with cloud cavitation under shedding frequency was discovered.Finally,using the DMD method,this study accurately extracted the dominant frequencies and modal characteristics,revealing that the energy of the oscillator mainly concentrates in the first two modes,forming larger coherent structures,while higher-frequency modes contain less energy.These experimental results provide important experimental and theoretical foundations for further research into the mechanisms of jet cavitation flow.

Key words

hydrodynamic cavitation / high-speed camera system / fluidic oscillator / grayscale processing / DMD

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ZHANG Ruihan, LI Kailin, LIU Gang, HAO Zongrui. Study on cavitation flow characteristics based on dynamic mode decomposition[J]. Journal of Qilu University of Technology, 2025, 39(1): 1-8 https://doi.org/10.16442/j.cnki.qlgydxxb.2025.01.001

References

[1]王国荣.空化技术理论及应用研究进展[J].科学技术与工程,2019,19(18):1-7.
[2]YE L Z,ZHU X J,WEI X M,et al. Damage characteristics and surface description of near-wall materials subjected to ultrasonic cavitation[J]. Ultrasonics Sonochemistry,2020,67:105175.
[3]SOYAMA H.Cavitating jet:A review[J].Applied Sciences,2020,10(20):7280.
[4]WANG B W,SU H J,ZHANG B.Hydrodynamic cavitation as a promising route for wastewater treatment:A review[J].Chemical Engineering Journal,2021,412:128685.
[5]海青.新型空化器设计及其流场与降解特性研究[D].北京:中国舰船研究院,2023.
[6]GEVARI M T,ABBASIASL T,NIAZI S,et al. Direct and indirect thermal applications of hydrodynamic and acoustic cavitation:A review[J].Applied Thermal Engineering,2020,171:115065.
[7]SONG Y C,WANG D Z,YIN J L,et al.Experimental studies on bubble breakup mechanism in a venturi bubble generator[J].Annals of Nuclear Energy,2019,130:259-270.
[8]GUO Z P,SUN X H,DONG Z Y.PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates[J].Water Science and Engineering,2020,13(2):145-153.
[9]MONTÁNS F J,CHINESTA F,GÓMEZ-BOMBARELLI R,et al.Data-driven modeling and learning in science and engineering[J].Comptes Rendus Mécanique,2019,347(11):845-855.
[10]TAIRA K,BRUNTON S L,DAWSON S T M,et al.Modal analysis of fluid flows:An overview[J].AIAA Journal,2017,55(12):4013-4041.
[11]KOU J Q,ZHANG W W.Dynamic mode decomposition with exogenous input for data-driven modeling of unsteady flows[J].Physics of fluids,2019,31(5):057106.
[12]TAIRA K,HEMATI M S,BRUNTON S L,et al.Modal analysis of fluid flows:Applications and outlook[J].AIAA Journal,2019,58(3):998-1022.
[13]SCHMID P J,VIOLATO D,SCARANO F.Decomposition of time-resolved tomographic PIV[J].Experiments in Fluids,2012,52(6):1567-1579.
[14]ZHANG H,LIU Y Q,WANG B L.Spatial-temporal features of the coherent structure of sheet/cloud cavitation flows using a frequency-weighted dynamic mode decomposition approach[J].Physics of Fluids,2021,33(5):053317.
[15]GE M M,MANIKKAM P,GHOSSEIN J,et al.Dynamic mode decomposition to classify cavitating flow regimes induced by thermodynamic effects[J].Energy,2022,254:124426.
[16]LIU M,TAN L,CAO S L.Dynamic mode decomposition of gas-liquid flow in a rotodynamic multiphase pump[J].Renewable Energy,2019,139:1159-1175.
[17]LIU Y Q,LONG J C,WU Q,et al.Data-driven modal decomposition of transient cavitating flow[J].Physics of Fluids,2021,33(11):113316.
[18]LIU X M,SONG J Q,LI B B,et al.Experimental study on unsteady characteristics of the transient cavitation flow[J].Flow Measurement and Instrumentation,2021,80:102008.
[19]SUN T Z,DONG S W,LIU Y Q,et al.Physical investigation of transient dynamic behaviors of cavitation-induced vibration over a flexible hydrofoil[J].Physics of Fluids,2021,33(11):113303.
[20]BRANDAO F L,BHATT M,MAHESH K.Numerical study of cavitation regimes in flow over a circular cylinder[J].Journal of Fluid Mechanics,2020,885:A19.
[21]NOACK B R,STANKIEWICZ W,MORZYN' SKI M,et al.Recursive dynamic mode decomposition of transient and post-transient wake flows[J].Journal of Fluid Mechanics,2016,809:843-872.
[22]KUTZ J N,BRUNTON S L,BRUNTON B W,et al.Dynamic Mode Decomposition:Data-Driven Modeling of Complex Systems[M].Philadelphia,PA:SIAM-Society for Industrial and Applied Mathematics,2016.
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