Cavitation characteristics analysis of a novel rotor-radial groove hydrodynamic cavitation reactor

Song, Yongxing; Hou, Ruijie; Liu, Zhengyang; Liu, Jingting; Zhang, Wei-Bin; Zhang, Linhua

doi:10.1016/j.ultsonch.2022.106028

Cited by 29 publications

(17 citation statements)

References 25 publications

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“…Recently, a novel RHGC that combines geometric features of indentation and vaned RGHCs was proposed by Song and coworkers [123] (Figure 17). Preliminary CFD study was carried out to investigate cavitation intensity and device efficiency.…”

Section: Hybrid Vaned Indentation Rghcmentioning

confidence: 99%

“…Therefore, they concluded that the key mechanisms for inactivation of bacteria were the presence of microjets, shock waves and shear stresses. [123]. Adapted with permission from Ref.…”

Section: Hybrid Vaned Indentation Rghcmentioning

confidence: 99%

“…Based on the reviewed literature, we can conclude that RGHCs are effective for both disinfection and pretreatment of wastewater or WAS. Since the main goal of this paper [123]. Adapted with permission from Ref.…”

Section: Rghc Comparisonmentioning

confidence: 99%

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A Review on Rotary Generators of Hydrodynamic Cavitation for Wastewater Treatment and Enhancement of Anaerobic Digestion Process

et al. 2023

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The issue of ever-increasing amounts of waste activated sludge (WAS) produced from biological wastewater treatment plants (WWTPs) is pointed out. WAS can be effectively reduced in the anaerobic digestion (AD) process, where methanogens break down organic matter and simultaneously produce biogas in the absence of oxygen, mainly methane and CO2. Biomethane can then be effectively used in gas turbines to produce electricity and power a part of WWTPs. Hydrodynamic cavitation (HC) has been identified as a potential technique that can improve the AD process and enhance biogas yield. Rotary generators of hydrodynamic cavitation (RGHCs) that have gained considerable popularity due to their promising results and scalability are presented. Operation, their underlying mechanisms, parameters for performance evaluation, and their division based on geometry of cavitation generation units (CGUs) are presented. Their current use in the field of wastewater treatment is presented, with the focus on WAS pre/treatment. In addition, comparison of achieved results with RGHCs relevant to the enhancement of AD process is presented.

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Section: Hybrid Vaned Indentation Rghcmentioning

confidence: 99%

“…Therefore, they concluded that the key mechanisms for inactivation of bacteria were the presence of microjets, shock waves and shear stresses. [123]. Adapted with permission from Ref.…”

Section: Hybrid Vaned Indentation Rghcmentioning

confidence: 99%

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A Review on Rotary Generators of Hydrodynamic Cavitation for Wastewater Treatment and Enhancement of Anaerobic Digestion Process

et al. 2023

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“…The cavitation strength and efficiency of the rotor hydrodynamic cavitation reactor mentioned above are much higher than that of traditional reactors. After the study and summary of the cavitation principle, we designed a novel rotor-radial groove hydrodynamic cavitation reactor (Song et al 2022). The reactor has a certain head of delivery, which can not only be used as a cavitation generation device, but also can provide power for pipeline circulation.…”

Section: Doltade Et Al (2019)mentioning

confidence: 99%

Hydrodynamic cavitation as an efficient water treatment method for various sewage:- A review

Song

Hou

Zhang

et al. 2022

Water Science and Technology

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With the development of industry and the rapid growth of population, the current water treatment technologies face much challenges. Hydrodynamic cavitation as a green and efficient means of water treatment method has attracted much attention. During the hydrodynamic cavitation, enormous energy could be released into the surrounding liquid which causes thermal effects (local hotspots with 4,600 K), mechanical effects (pressures of 1,500 bar) and chemical effects (hydroxyl radicals). These conditions can degrade bacteria and organic substance in sewage. Moreover, the combination of hydrodynamic cavitation and other water treatment methods can produce coupling effect. In this review, we summary the methods of hydrodynamic cavitation and the performance of water treatment for different types of sewage. The application of hydrodynamic cavitation reactors with different structures in water treatment have also been evaluated and discussed. The design and optimization of high-performance hydrodynamic cavitation reactor is the most crucial issues for the application of hydrodynamic cavitation in water treatment. Finally, recommendations are provided for the future progress of hydrodynamic cavitation for water treatment.

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“…The results indicated that smaller s and greater θ in proper ranges always benefit the cavitation performance. Song et al (2022) investigated the influence of the cavitation generating unit (CGU) shape, interaction distance and rotor speed on the cavitation intensity and the cavitation energy efficiency of a novel rotor radial groove hydrodynamic cavitation reactor by using the realizable k-ε turbulence model and Zwart cavitation model. They observed that the cavitation performance of rectangular-shaped CGUs was better than that of cylindrical-shaped CGUs, and increasing the rotor speed and decreasing the interaction distance can improve the cavitation performance more effectively.…”

Section: Introductionmentioning

confidence: 99%

Optimized Geometric Structure of a Rotational Hydrodynamic Cavitation Reactor

2023

JAFM

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The objective of this paper is to obtain an excellent structure of a rotational hydrodynamic cavitation reactor (RHCR) by a numerical method and then to investigate the cavitating flow characteristics of the optimized RHCR experimentally. The RNG k-ε turbulence model combined with the Zwart cavitation model was applied to analyze the influence of the straight blade number, the baffle position and the baffle shape on the pressure field, bubble distribution and turbulence kinetic energy of the RHCR. The results show that compared to the original model, an RHCR with a straight blade number of 6, a baffle position of 0.74 and a triangular baffle offers better cavitation performance. Moreover, the energy performance and the cavitation development process of the optimized RHCR were studied experimentally. The results indicate that the multiscale bubbles are induced by straight blades and baffles of the optimized RHCR, accompanied by the twice quasi-periodic shedding dynamics in one cycle. The findings of this study have positive significance for the design and optimization of RHCRs.

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Cavitation characteristics analysis of a novel rotor-radial groove hydrodynamic cavitation reactor

Cited by 29 publications

References 25 publications

A Review on Rotary Generators of Hydrodynamic Cavitation for Wastewater Treatment and Enhancement of Anaerobic Digestion Process

A Review on Rotary Generators of Hydrodynamic Cavitation for Wastewater Treatment and Enhancement of Anaerobic Digestion Process

Hydrodynamic cavitation as an efficient water treatment method for various sewage:- A review

Optimized Geometric Structure of a Rotational Hydrodynamic Cavitation Reactor

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