Insight of hydrodynamic characteristics related to ultra-high pressure water jet rust removal sprayers

CHEN Zhengshou; HUANG Luyun; DU Bingxin; CHEN Yuanjie; NI Luxin; JIANG Hua

doi:10.11883/bzycj-2021-0310

Volume 42 Issue 5

May 2022

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CHEN Zhengshou, HUANG Luyun, DU Bingxin, CHEN Yuanjie, NI Luxin, JIANG Hua. Insight of hydrodynamic characteristics related to ultra-high pressure water jet rust removal sprayers[J]. Explosion And Shock Waves, 2022, 42(5): 053303. doi: 10.11883/bzycj-2021-0310

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Insight of hydrodynamic characteristics related to ultra-high pressure water jet rust removal sprayers

doi: 10.11883/bzycj-2021-0310

1.
Naval Architecture and Maritime College, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China
2.
The Paxocean Engineering Co. Ltd., Zhoushan 316057, Zhejiang, China

Received Date: 2021-07-23
Rev Recd Date: 2021-10-25

Available Online: 2022-03-29

Publish Date: 2022-05-27

Abstract

Abstract

Based on the quantitative analysis of the external parameters in relation to ultra-high pressure water jet sprayers, an optimal method for the key parameters of water jets was proposed, aiming at improving the efficiency of the water jets. Firstly, according to the characteristics of the ultra-high pressure water jet rust removal nozzles, the three-dimensional models of the single-beam and rotating multi-beam nozzles were established and used for the numerical simulations in which taking the water compressibility and cavitation effects into account. By changing the relevant characteristic parameters, such as standoff distances, jet angles and rotating speeds, the hydrodynamic performances related to the ultra-high pressure water jet rust removal nozzles were investigated though the simulations. Secondly, the effects of the standoff distances and jet angles for the single-beam nozzle on the distributions of the wall shear stress and impact pressure as well as the relationship between the length of the potential core of the jet and the optimal standoff distance were analyzed. Results show that the wall shear stress reaches its maximum value when the standoff distance is equal to the length of the potential core of a jet. Finally, by analyzing the effects of entrainment and water cushion on the distributions of the wall shear stress and impact pressure, the optimal rotating speed and corresponding linear speed were obtained. The research results preliminarily clarify the rust removal mechanism of the water jet and the effect of the characteristic parameters related to the single-beam nozzle and rotating multi-beam nozzle on the jet effect, and can provide references for the design and assembly of an ultra-high pressure rust removal equipment.
- ultra-high pressure water jet,
- hydrodynamic,
- jet angle,
- standoff distance,
- rotating speed

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References

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