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Volume 14
Issue 15
10.3390/ma14154165
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Article

Analysis of the Erosivity of High-Pressure Pulsating Water Jets Produced in the Self-Excited Drill Head

by
Monika Szada-Borzyszkowska
,
Wojciech Kacalak
,
Dariusz Lipiński
* and
Błażej Bałasz
Faculty of Mechanical Engineering, Koszalin University of Technology, Racławicka 15-17, 75-620 Koszalin, Poland
*
Author to whom correspondence should be addressed.
Materials 2021, 14(15), 4165; https://doi.org/10.3390/ma14154165
Submission received: 28 May 2021 / Revised: 23 July 2021 / Accepted: 25 July 2021 / Published: 27 July 2021
(This article belongs to the Special Issue Advanced Designs of Materials, Machines and Processes in a Circular Economy)
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Abstract

The dynamic impact of a water jet with a periodically changing structure can be used in various industries. The paper presents a design solution for a self-excited pulse head. This head can be used in mining for drilling holes and breaking rocks. The design of the head was developed based on computer simulations, which made it possible to learn the mechanism of impulse shaping inside the head. Tests of the water jet produced in the self-excited pulsation head showed the occurrence of periodic changes in its internal structure and pulsation frequency. A significant increase in the dynamic stream pressures was demonstrated for the head working in the water environment compared to the head working in the air environment For example, for nominal medium and highest pressures, this increase is up to 82%, while for the lowest pressures (10 MPa), the pressure force values increase by 46%. It was found that an increase in the nominal water pressure causes a decrease in the frequency of hydrodynamic pulses in the head operating in both the water and air environment.
Keywords: water jet; pulsed water jet; FEM; simulations; self-excited pulsating head; hydro jetting-erosion water jet; pulsed water jet; FEM; simulations; self-excited pulsating head; hydro jetting-erosion

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MDPI and ACS Style

Szada-Borzyszkowska, M.; Kacalak, W.; Lipiński, D.; Bałasz, B. Analysis of the Erosivity of High-Pressure Pulsating Water Jets Produced in the Self-Excited Drill Head. Materials 2021, 14, 4165. https://doi.org/10.3390/ma14154165

AMA Style

Szada-Borzyszkowska M, Kacalak W, Lipiński D, Bałasz B. Analysis of the Erosivity of High-Pressure Pulsating Water Jets Produced in the Self-Excited Drill Head. Materials. 2021; 14(15):4165. https://doi.org/10.3390/ma14154165

Chicago/Turabian Style

Szada-Borzyszkowska, Monika, Wojciech Kacalak, Dariusz Lipiński, and Błażej Bałasz. 2021. "Analysis of the Erosivity of High-Pressure Pulsating Water Jets Produced in the Self-Excited Drill Head" Materials 14, no. 15: 4165. https://doi.org/10.3390/ma14154165

APA Style

Szada-Borzyszkowska, M., Kacalak, W., Lipiński, D., & Bałasz, B. (2021). Analysis of the Erosivity of High-Pressure Pulsating Water Jets Produced in the Self-Excited Drill Head. Materials, 14(15), 4165. https://doi.org/10.3390/ma14154165

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