Optimization design of nozzle and analysis of flow field in fluid jet polishing

Jiahui Li; Weihao Ma; Xi Hou

doi:10.1117/12.2656296

9 January 2023 Optimization design of nozzle and analysis of flow field in fluid jet polishing

Jiahui Li, Weihao Ma, Xi Hou

Proceedings Volume 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022); 1250725 (2023) https://doi.org/10.1117/12.2656296
Event: 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 2022, Changchun, China

Abstract

In this paper, the geometric structure of the nozzle in fluid jet polishing is optimized by computational fluid dynamics simulation. The design of small-diameter nozzle is carried out, the relationship between nozzle structure and fluid movement is analyzed, and the influence of machining error on nozzle to fluid stability is considered. Firstly, according to Bernoulli's Principle, the velocity at the nozzle outlet is theoretically calculated, and the holding length of the outlet velocity is defined. Based on computational fluid dynamics simulation, the ability to maintain fluid energy of different nozzle diameters with different length-diameter ratio is analyzed. The results show that the larger the nozzle diameter, the smaller the effect of the length-diameter ratio on the ability of maintain fluid energy. The divergence ratio is defined to explain the ability of constraining the divergence of the fluid. The larger the diameter, the smaller the influence of length-diameter ratio on the position of peak shear force. Then, aiming at the verticality of the cylindrical section in nozzle outlet caused by machining error is difficult to guarantee, the influence of inclination of cylindrical section on ability to maintain fluid energy and constraint the divergence of the fluid is analyzed. The shear force distribution on the workpiece surface still presents a circular shape within the inclination angle is small, and the acceptable error range of inclination angle is given. Finally, a fixed-point experiment of nanoparticle jet polishing is carried out on the surface of fused quartz, and the material removal profile is obtained.

Citation Download Citation

Jiahui Li, Weihao Ma, and Xi Hou "Optimization design of nozzle and analysis of flow field in fluid jet polishing", Proc. SPIE 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 1250725 (9 January 2023); https://doi.org/10.1117/12.2656296

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KEYWORDS

Computational fluid dynamics

Polishing

Manufacturing

Surface finishing

Computer simulations

Error analysis

Motion analysis

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