Quantitative evaluation of erosive cavitation pressure field from pits in material: fact or myth?

9th International Symposium on Cavitation

Choi, J.-K.^1 ; Chahine, G.L.^1

DYNAFLOW, INC., 10621-J Iron Bridge Road, Jessup

MD

20794, United States^1

关键词: Cavitation fields;    Cavitation intensity;    Cavitation pressure;    Finite element computations;    Impulsive pressure;    Material response;    Quantitative evaluation;    Quantitative measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012045/pdf
DOI  :  10.1088/1742-6596/656/1/012045

来源: IOP

【 摘 要 】

Material pitting in a cavitating flow has been used for a long time as an indicator of the vague 'cavitation intensity' concept. Periodically, some researchers suggest pitting tests as a "simple" means to provide quantitative measurements of the amplitude of the impulsive pressures in the cavitation field, especially when combined with Tabor's formula or with simple finite element computations with static loads. This paper examines the viability of such a method using fully coupled bubble dynamics and material response, and strongly concludes that the commonly accepted idea is a myth, as different loading scenarios with the same amplitude of the cavitation impulsive pressure result in different pit aspect ratios.