Design and evaluation of high-pressure nozzle assembly for laser cutting of thick carbon steel

Marimuthu, Sundar; Nath, Ashish Kumar; Dey, P. K.; Misra, Dipten; Bandyopadhyay, Debasish; Chaudhuri, Sheli Sinha

doi:10.1007/s00170-017-0107-6

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…13,50) . 개발 등에 대한 연구가 진행되고 있다 13,14,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] . 6에 정리하였다 13,14,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] .…”

Section: Excellent Remote Control and Fast Cutting Speedunclassified

Market and Development Trends in Thermal Cutting Technology for Nuclear Power Plant Decommissioning

Lee,

Kim,

Suh

et al. 2023

J Weld Join

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According to a recent report on nuclear power plants, 686 nuclear reactors exist worldwide, of which 172 have been permanently closed, and 20 have been completely dismantled. The design life of nuclear power plants worldwide is being reached, and the number of decommissioned reactors being closed because of economic and political reasons is expected to increase. Therefore, the growth of the decommissioning market locally and globally is inevitable. In this review paper, the growth potential of the nuclear power plant-decommissioning market and examples of cutting technology research and development in Korea and overseas is discussed. Among the applied cutting processes, mechanical cutting accounts for the majority; however, underwater processing is required for structures at intermediate or higher levels at which radioactivity has progressed for shielding and other purposes. Accordingly, process development for thermal cutting is actively progressing. Representative studies on thermal cutting process are summarized, and the current state of technological development of the laser-cutting process is presented.

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Section: Excellent Remote Control and Fast Cutting Speedunclassified

Market and Development Trends in Thermal Cutting Technology for Nuclear Power Plant Decommissioning

Lee,

Kim,

Suh

et al. 2023

J Weld Join

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“…Moreover, the exit jet from the supersonic nozzle in the free stream has been numerically studied to illustrate the behavior of the exit jet pattern under various operating conditions [20][21][22]. Zhang et al [20] numerically modeled and visualized the exit jet patterns from two supersonic nozzles, a Minimum Length Nozzle (MLN) designed according to the Method of Characteristics (MOC) and an identical commercial supersonic nozzle with straight walls diverging by 5 • .…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the MLN nozzle generates a uniform, bounded, and stable jet, extending for a longer distance (1.4 times) compared to the commercial one. Other authors in [21] investigated the gas-assisted laser cutting flow through a supersonic nozzle operated at high pressure under various operating conditions (desired-design, over-expansion, and under-expansion). The achieved results have been further investigated and accurately simulated by means of an efficient model developed by the authors of the current work [22]; the same model was used to simulate the exit jet behavior from the nozzles proposed in this article under various operating stagnation pressures [23].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Inert Gas-Assisted Laser Cutting Performances and Quality Using Supersonic Nozzles

Orazi

Darwish

Reggiani

2019

Metals

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In the present work, three different supersonic nozzles were designed and manufactured to operate at various stagnation pressures during laser cutting. Several cutting experiments were performed on stainless steel samples of various thicknesses (2, 4, 6 mm) using a fiber laser of 3 kW with a head adapted to fit with both the proposed supersonic nozzles and a commercial reference conical nozzle. The flow through these nozzles was numerically modeled and compared with the Schlieren visualization measurements. The mass flow rate, the Mach number, and the pressure distributions were selected in detail in order to analyze the dynamic characteristics of the exit jet and to comparatively assess the achieved cutting quality (roughness perpendicularity) and capability (maximum thickness, cutting speed). The numerical and the experimental results were found to be in high agreement in terms of the flow structure and mass flow rate. In addition, a significant reduction of the assistance gas consumption of up to 65% on average was achieved by using supersonic nozzles as opposed to conical ones, accompanied with the decrease of the operating pressure and the increase of the cutting speed.

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Simulation and analysis of the jet flow patterns from supersonic nozzles of laser cutting using OpenFOAM

Darwish

Orazi

Angeli

2019

Int J Adv Manuf Technol

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Design and evaluation of high-pressure nozzle assembly for laser cutting of thick carbon steel

Cited by 7 publications

References 17 publications

Market and Development Trends in Thermal Cutting Technology for Nuclear Power Plant Decommissioning

Market and Development Trends in Thermal Cutting Technology for Nuclear Power Plant Decommissioning

Investigation on the Inert Gas-Assisted Laser Cutting Performances and Quality Using Supersonic Nozzles

Simulation and analysis of the jet flow patterns from supersonic nozzles of laser cutting using OpenFOAM

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