Generalized equation for calculating rock cutting efficiency by pulsed water jets

Polyakov, A.V.; Zhabin, A.B.; Averin, Eugene; Polyakov, Aleksey

doi:10.1016/j.jrmge.2018.11.009

Cited by 28 publications

(6 citation statements)

References 15 publications

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“…Some parameters, such as surface roughness, need to be further investigated and adapted to evaluate the fish-cutting quality. As for simulation development, current simulation models for cutting processes and quality are mainly based on regression analysis, response surface methodology (RSM), computational fluid dynamics (CFD), and finite element method (FEM) [ 151 , 152 , 153 , 154 ]. Since the waterjet cutting method has great potential for fish cutting, future fish cutting simulation and theory development should pay more attention to pure and abrasive waterjet cutting processes of whole fish and fish fillets with higher accuracy and robustness.…”

Section: Future Perspectivesmentioning

confidence: 99%

Cutting Techniques in the Fish Industry: A Critical Review

Liu

Lyu

et al. 2022

Foods

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Fish and fishery products are among the most important sources of nutritional components for human health, including high-quality proteins, essential vitamins, minerals, and healthy polyunsaturated fatty acids. Fish farming and processing technologies are continuously evolving to improve and enhance the appearance, yield, and quality of fish and fish products from farm to fork throughout the fish supply chain, including growth, postharvest, treatment, storage, transportation, and distribution. Processing of fish involves a period of food withdrawal, collection and transportation, the process of stunning, bleeding, chilling, cutting, packaging, and byproduct recycling. Cutting is a set of crucial operations in fish processing to divide the whole fish into smaller pieces for producing fish products (e.g., fish fillets, steaks, etc.). Various techniques and machinery have been introduced in the field to advance and automate cutting operations. This review aims to provide a comprehensive review of fish cutting techniques, machine vision and artificial intelligence applications, and future directions in fish industries. This paper is expected to stimulate research on enhancing fish cutting yield, product diversity, safety and quality, as well as providing advanced solutions for engineering problems encountered in the fish industry.

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Section: Future Perspectivesmentioning

confidence: 99%

Cutting Techniques in the Fish Industry: A Critical Review

Liu

Lyu

et al. 2022

Foods

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“…From equation 7, (8), (11) and (12), the jet pressure pjet depends on the operating parameter qsin and the structural parameter (dp1, dp2, dn), the pulse frequency f depends on the operating parameter (qrin, qsin) and the structural parameter (h, dp2, dp3), the pulse duration ts depends on the operating parameter qsin and the structural parameter (h, dp1, dp2, dn).…”

Section: Analysis Of Pulse Pressure Pulse Frequency and Pulse Durationmentioning

confidence: 99%

“…Pulsed water jet is a kind of water jet acting on the target in the form of pulse, which can make the rock produce tensile, shear and fatigue damage under low jet pressure, and form macro cracks that lead to volume fracture by effectively applying the water-hammer effect of the jet to the target, the stress wave under the impact and the pulsed cyclic shock [7][8][9]. Research results show that the erosion ability of pulsed jet is significantly higher than that of continuous water jet under the same pressure, and the specific energy consumption is lower [10][11].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the generation device, the system also includes the power source, the pressure acquisition system and the image collection system.The power source mainly consists of oil pump, relief valve and throttle valve.The oil pump provides power for the generation of the self-supercharging pulsed jet, the relief valve regulates the inlet pressure, and the throttle valve adjusts the pulse frequency. The principle of frequency regulation of the throttle valve as follows: The structural parameters of the device are fixed, according to equation(3),(11) and(12), if the inlet flow area Ay is reduced without changing the inlet pressure, the outlet flow rate qout decreases, the backward stroke velocity vr of the piston decreases and the backward stroke time tr becomes longer, but the stroke time ts is constant, the pulse frequency f will decrease and vice versa. The oil-return line is added with throttle valve to adjust the pulse frequency without changing the pulse pressure.…”

mentioning

confidence: 99%

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The Formation Principle and Characteristics of Self-supercharging Pulsed Water Jet

Ling

Tang³

et al. 2020

Preprint

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High-pressure pulsed water jet technology has high development potential in the field of rock fragmentation. Technical bottlenecks such as difficulty in pressurization and inconvenient frequency adjustment for existing types of pulsed jets, a self-supercharging pulsed water jet generation method is proposed based on the theory of pulsed water jet and principle of hydraulic boosting, which changes the flow direction of fluid medium through the valve core to make the piston reciprocate in the cylinder, and relies on the effective area difference between the front and rear chambers in the stroke stage of the piston to realize the organic combination of “pulse” and “supercharging” of the jet, so as to self-supercharging pulsed water jet. Based on revealing the formation principle of self-supercharging pulsed jet, the self-supercharging pulsed jet generation system was designed, and the self-supercharging pulsed jet testing platform was built, many groups of pressure collection and jet shape observation experiments were carried out for different operating parameters. The research results show that both the jet pressure and the jet shape show periodic change, and higher pulse pressure can be obtained at lower inlet pressure. The error of the pressure ratio calculated according to the experimental results is less than 3% compared with the theoretical design value, thus verifying the feasibility of the method . Pulse pressure and pulse frequency are controllable, that is, as the inlet flow rate increases in the stroke phase of the piston, the pulse pressure and pulse frequency increase, and the pulse duration decreases, as the inlet flow rate increase in the backward stroke phase of the piston, the pulse frequency increases, and the pulse pressure and pulse duration remain unchanged. The research results lay the foundation for enriching the theory of pulsed jet generation and expanding its application range.

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“…Additionally, substantial efforts have been dedicated to conducting various experiments to investigate the cutting ability of AWJ. For instance, Polyakov et al 16 investigated the relationship between indicators of rockcutting ability and parameters of pulsed water jets, this finding can be used to increase productivity and reduce energy consumption. Aydin et al 17 analyzed the influence of AWJ operating variables on the cutting depth and developed a model for predicting the cutting depth from the operating variables and rock properties in AWJ machining of granitic rock.…”

mentioning

confidence: 99%

Rock-cutting ability and field application research of a novel slurry abrasive water jet cutting system

Dong,

Yuan,

Lang

et al. 2024

Preprint

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The abrasive water jet (AWJ) is an innovative technology employed in underground engineering to enhance the stability of surrounding rock, facilitate unconventional oil and gas development, and rock breaking in tunnel engineering. However, current AWJ cutting systems often face challenges related to intricate operational processes and an incontiguous supply of abrasive particles. Here, a novel slurry abrasive water jet (S-AWJ) cutting system has been developed to fulfill the operational requirement of underground engineering. Some rock-cutting experiments under different parameter combinations (cutting method, abrasive type and size, water-to-abrasive mass ratio, standoff distance, jet pressure, nozzle diameter, and traverse speed) were conducted to investigate the rock-cutting ability of the novel S-AWJ cutting system. Additionally, the field application of the novel S-AWJ cutting system in a coal mine was analyzed. The results reveal that the novel S-AWJ cutting system outperforms the pure water jet. The cutting depth increases with increased abrasive particle size, content, and jet pressure. Moreover, the cutting depth shows a trend of initially increasing and subsequently decreasing with the elevation of the standoff distance. The cutting depth is negatively correlated with the traverse speed. Lower traverse speeds result in reduced cutting efficiency and increased abrasive consumption. The cutting depth is not significantly affected by the nozzle diameter. The process parameters are recommended to achieve optimal cutting ability. Combined with the S-AWJ cutting mechanism, there is a higher correlation between cutting depth and rock compressive strength. Furthermore, field cutting tests demonstrate that the novel S-AWJ cutting system exhibits a positive actual application effect. This study provides a theoretical basis for parameter optimization and field applications of the novel S-AWJ cutting system in underground engineering.

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Generalized equation for calculating rock cutting efficiency by pulsed water jets

Cited by 28 publications

References 15 publications

Cutting Techniques in the Fish Industry: A Critical Review

Cutting Techniques in the Fish Industry: A Critical Review

The Formation Principle and Characteristics of Self-supercharging Pulsed Water Jet

Rock-cutting ability and field application research of a novel slurry abrasive water jet cutting system

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