Abstract
A compressible two-phase solver considering phase transition and thermodynamic effects is developed on OpenFOAM to numerically investigate the dynamics of single cavitation bubble collapse near the rigid wall. A grid independence analysis is conducted, and the accuracy of the pressure field is verified by comparing the numerical results with the experimental results. The emission process of acoustic energy during the bubble collapse is discussed. Moreover, the acoustic radiation energy in the flow field under different dimensionless bubble-wall distances γ is further studied, which is related to the mechanism of cavitation erosion. The results show that γ−value has a significant effect on the amplitude of acoustic energy. The maximum amplitude of acoustic energy accounts for 8% to 25% of the total energy in the flow field when γ−value ranges from 0.1 to 2.0. The amplitude of acoustic energy decreases with γ in the range 0.1<γ<0.9 while increases with γ in the range 0.9<γ<2.0.
Funder
National Natural Science Foundation of China
Zhejiang Provincial Natural Science Foundation
the National Key Research and Development Programmes of China,
Subject
Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry
Reference45 articles.
1. Coalesced effect of cavitation and silt erosion in hydro turbines—A review;Renew. Sustain. Energy Rev.,2014
2. Some remarks on hydrofoil cavitation;J. Hydrodyn. Ser. B,2012
3. Detection of cavitation in hydraulic turbines;Mech. Syst. Signal Process.,2006
4. Avellan, F. (2004). Introduction to Cavitation in Hydraulic Machinery, Politehnica University of Timișoara. Technical Report.
5. Hydro turbine failure mechanisms: An overview;Eng. Fail. Anal.,2014
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