ASSESSING CAVITATION EROSION ON SOLID SURFACES USING A CAVITATION JET APPARATUS

被引：5
|
作者：
Mohammadizadeh, S. M. [1 ]
Dalfre Filho, J. G. [1 ]
Descovi, C. S. [2 ]
Murillo-Bermudez, L. F. [2 ]
Sierra, D. A. [2 ]
Corzo, G. [2 ]
机构：
[1] State Univ Campinas UNICAMP, Fac Engn Civil Arquitetura & Urbanismo FECFAU, Campinas, Brazil
[2] State Univ Campinas UNICAMP, Campinas, Brazil
来源：
HOLOS | 2023年 / 39卷 / 05期
关键词：
Cavitation; Cavitation Erosion; Submerged Cavitation Jet; Nozzle Geometry; Cavitation Jet Apparatus (CJA); WATER;
D O I：
10.15628/holos.2023.16306
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This study is dedicated to the examination of cavitation-induced erosion, a critical factor in optimizing the efficiency of hydraulic systems, including hydropower plants and pumping systems. To accomplish this, we conducted a sensitivity analysis utilizing a cavitation jet apparatus (CJA) and an experimental configuration that featured a vertical cylindrical test tank, a submerged nozzle, and an aluminum sample (specifically, alloy 6351 T6). The study maintained a consistent standoff distance of 5 cm and an orifice diameter of 2 x 10(-3) m. Two distinct nozzle geometries were tested to assess their influence on cavitation erosion. The outcomes revealed that the 20 degrees conical sharped-edges nozzle resulted in the highest erosion rates, while the commercial nozzle (MEG 2510) caused comparatively less erosion. By standardizing the test duration to 1200 seconds and using a cavitation index of 0.14, the researchers avoided overlapping pits. In summary, the CJA, with these adjustments, demonstrated its effectiveness as a tool for evaluating the resistance of solid surfaces to cavitation.
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页数：13
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