Effects of Bubble Dynamic Characteristics on Flow Field in Venturi

Abstract:

Based on the Rayleigh-Plesset-Keller-Kolodner equation, the dynamics of single bubble is calculated regarding water as work medium in the conditions of different ratio of inlet pressure and outlet pressure. The flow field in venturi is simulated by fluid dynamics. The results show that the velocity in throat location and maximum cavitation volume fraction increase with ratio of inlet pressure and outlet pressure increasing. The area of cavitation extends. The pressure in throat location reduces and then become stable. The maximum growth rate of single bubble and pressure pulse in bubble increase significantly. The recurrence times of growth and collapsing increases. The influence of single bubble dynamics on the distribution of the whole flow field depends on the turbulence intensity. The more severe the turbulence in venture, the less the effect of single bubble on the whole flow field.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2823-2828
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2823
• Online since: September 2013
• Authors: Xiao Lei Li, Chang Jian Qin, Hui Сhen Zhang
• Keywords: Average Effect, Bubble, Dynamic Characteristic, Turbulence, Venturi

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