CFD analysis of thermal fields for ice abrasive water jet

Jerman, Marko; Orbanić, H.; Valentinčič, Joško

doi:10.1016/j.ijmecsci.2022.107154

Cited by 19 publications

(2 citation statements)

References 35 publications

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“…To visually observe changes in pulsation effect of temperature, pressure, and velocity in the cavity, simulation methods must be employed. M. Jerman [10] used computational fluid dynamics software to simulate and analyze the pressure and temperature of water upstream of the nozzle in ice abrasive water jet (IAWJ) technology, where ice particles replace abrasives. Peng [11] introduced a compressible mixture flow method based on the estimate of bubble cavitation simplification submerged and applied it to simulate the high-speed water jet from a submerged hole nozzle.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of self-oscillating pulsed jet nozzle

Dai,

Sun,

Zhou

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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This paper investigates effects of velocity and pressure fluctuation at the outlet of a self-excited oscillating water jet nozzle. First, a three-dimensional model of the self-excited oscillating nozzle is established for modal analysis, which identifies two favorable modes with corresponding natural frequencies of 268 Hz and 500 Hz. Subsequently, using the Transient Structural and Fluent modules in Workbench, a three-dimensional fluid-structure interaction model of the self-excited oscillating nozzle system is created. Different initial velocities are applied at the nozzle inlet, inlet along with disturbances at various frequencies of the velocity. Finally, a bidirectional fluid-structure coupling simulation is conducted on the model. Research findings indicate that significant velocity and pressure fluctuations occur at the outlet when the applied disturbance velocity frequency matches the natural frequencies of the nozzle system identified in the modal analysis, specifically 268 and 500 Hz. The best fluctuation effect is observed when the disturbance velocity frequency is 500 Hz, with the velocity fluctuation amplitude approximately 1.9 times that of 268 Hz and 7.4 times that without the disturbance velocity. Similarly, the pressure fluctuation amplitude is approximately 1.8 times that of 268 Hz and 7.2 times that without the disturbance velocity.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of self-oscillating pulsed jet nozzle

Dai,

Sun,

Zhou

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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“…However, the latter method is related to higher cost due to the use of liquid nitrogen [27]. Furthermore, according to Jerman, Orbanic and Valentincic [29], special studies need to be conducted in order to determine a feasible ice particle diameter which could be obtained and optimize the cutting head geometry in order to be able to efficiently use these particles. Apart from using ice particles as an abrasive, another possible alternative is to perform cryogenic-assisted AWJM by means of a liquid nitrogen jet.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Feasibility of Using Eco-Friendly Walnut Shell Abrasive Particles for Pocket Milling of Titanium Workpieces by Abrasive Waterjet Technology

Karkalos,

Karmiris-Obratański

2023

Metals

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Abrasive waterjet technology is nowadays a well established non-conventional method with significant capabilities for material removal with high productivity and minimum environmental impact compared to other processes. However, in order to be in line with the green transition directives, further steps are required to ensure the sustainability of manufacturing processes and reduce the risk of material depletion by employing recyclable materials. For this purpose, an eco-friendly abrasive material such as walnut shell is employed for pocket machining of a titanium alloy workpiece. Due to the relatively low hardness of this material, compared to common abrasive materials such as garnet or alumina, it is required to determine the appropriate range of process parameters in order to obtain high-quality pockets with high productivity. Thus, in this work, a comprehensive experimental study is conducted in order to determine the effect of various process parameters on pocket depth, pocket width, material removal rate, flatness and parallelism error of produced pockets. The results prove the feasibility of using walnut shell as abrasive material for pocket milling, although MRR is almost an order of magnitude lower than the values commonly obtained for usual abrasives. Moreover, it is not recommended to use jet pressure values over 250 MPa so dimensional accuracy, flatness and parallelism error are maintained in acceptable values.

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