Experimental investigation on cavitation performance of the annular-slit rotational hydrodynamic cavitation reactor

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Yong Wang, Ming Li, Jie Chen, Fei Liu, Yu Huang, Xiaolin Wang, Houlin Liu, Lei Zhang
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引用次数: 0

Abstract

The objective of this paper is to investigate the cavitation performance of the annular-slit rotational hydrodynamic cavitation reactor (ASRHCR) with emphasis on degradation characteristics of methylene blue (MB) by the ASRHCR. The transparent ASRHCR is utilized to carry out the experiments, the internal cavitating flow and pressure fluctuation of the ASRHCR are synchronously available using high-speed camera and pressure fluctuation testing technique. The independent effect of rotational speed, flow rate, inlet pressure and initial concentration of solution on the degradation of MB is evaluated in sequence. The experimental results indicate that the ASRHCR has sufficient head for transporting fluid medium. Three cavitation patterns are induced by the ASRHCR: separation cavitation, vortex cavitation and shear cavitation, where the shear cavitation is the main cavitation pattern and shows obviously quasi-periodic growth, shedding and collapse, which dominates the cavitation intensity and degradation of MB. The rotational speed, flow rate and inlet pressure significantly affect the cavitation patterns, resulting in different degradation characteristics of MB, the degradation rate of MB increases when the shedding frequency of shear cavitation is intensified. Furthermore, there is an optimal initial concentration of MB solution that helps achieve the best degradation performance of the ASRHCR. These findings provide valuable insight into the design of rotational hydrodynamic cavitation reactor.

Abstract Image

环形狭缝旋转流体动力空化反应器空化性能的实验研究
本文旨在研究环形狭缝旋转流体动力空化反应器(ASRHCR)的空化性能,重点研究亚甲基蓝(MB)在 ASRHCR 中的降解特性。实验采用透明的环缝旋转流体动力空化反应器,利用高速摄像和压力波动测试技术,同步记录环缝旋转流体动力空化反应器的内部空化流和压力波动。依次评估了转速、流量、入口压力和溶液初始浓度对甲基溴降解的独立影响。实验结果表明,ASRHCR 有足够的水头来输送流体介质。ASRHCR 诱导了三种空化形态:分离空化、涡旋空化和剪切空化,其中剪切空化是主要的空化形态,表现出明显的准周期性增长、脱落和塌陷,主导了空化强度和甲基溴的降解。转速、流速和入口压力对空化形态有显著影响,从而导致甲基溴的降解特性不同,当剪切空化的脱落频率加强时,甲基溴的降解率增加。此外,甲基溴溶液的最佳初始浓度有助于实现 ASRHCR 的最佳降解性能。这些发现为旋转流体动力空化反应器的设计提供了宝贵的启示。
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来源期刊
CiteScore
3.60
自引率
13.60%
发文量
536
审稿时长
4.8 months
期刊介绍: The Journal of the Brazilian Society of Mechanical Sciences and Engineering publishes manuscripts on research, development and design related to science and technology in Mechanical Engineering. It is an interdisciplinary journal with interfaces to other branches of Engineering, as well as with Physics and Applied Mathematics. The Journal accepts manuscripts in four different formats: Full Length Articles, Review Articles, Book Reviews and Letters to the Editor. Interfaces with other branches of engineering, along with physics, applied mathematics and more Presents manuscripts on research, development and design related to science and technology in mechanical engineering.
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