AVALIAÇÃO DA EROSÃO POR CAVITAÇÃO EM SUPERFÍCIES SÓLIDAS USANDO UM APARATO DE JATO DE CAVITAÇÃO

IF 0.2 Q4 MULTIDISCIPLINARY SCIENCES

Holos Pub Date : 2023-12-18 DOI:10.15628/holos.2023.16306

SeyedMehdi Mohammadizadeh, José Gilberto Dalfré Filho, Cassiano Sampaio Descovi, Luis Fernando Murillo Bermúdez, Daniel Alfonso Sierra, Gerarld Corzo Pérez

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Abstract

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 × 10-3 m. Two distinct nozzle geometries were tested to assess their influence on cavitation erosion. The outcomes revealed that the 20° 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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利用空化喷射装置对固体表面的空化侵蚀进行评估

气蚀是优化包括水电站和泵送系统在内的液压系统效率的一个关键因素，本研究致力于研究气蚀引起的侵蚀。为此，我们利用空化喷射装置 (CJA) 和实验配置（包括垂直圆柱形测试槽、浸没式喷嘴和铝（特别是合金 6351 T6）样品）进行了敏感性分析。该研究保持了 5 厘米的一致间距和 2 × 10-3 米的喷口直径。对两种不同的喷嘴几何形状进行了测试，以评估它们对空化侵蚀的影响。结果显示，20° 锥形锐边喷嘴的侵蚀率最高，而商用喷嘴（MEG 2510）的侵蚀率相对较低。通过将测试持续时间标准化为 1200 秒并使用 0.14 的空化指数，研究人员避免了坑洞重叠。总之，CJA 经过这些调整后，证明了其作为评估固体表面抗气蚀能力的工具的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Holos MULTIDISCIPLINARY SCIENCES-

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审稿时长

30 weeks