Velocity-particle size synchronous reconstruction and distribution analysis of spray field based on PIV technology

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-09-20 DOI:10.1016/j.powtec.2025.121665

Cuicui Xu , Xinyu Jia , Dongdong Dai , Yujie Chen , Yanan Miao , Lin Li , Gang Zhou

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引用次数: 0

Abstract

Spray dust suppression technology is a kind of dust removal method widely used in underground mines, and understanding the droplet field distribution characteristics is crucial for improving its efficiency. This study used the 2D Particle Image Velocimetry (PIV) to analyze the distribution of the velocity field under different nozzle outlet diameters and pressure conditions. The extraction and analysis of different particle sizes in spray images were realized using MATLAB. The results showed that as the water supply pressure increased and the nozzle outlet diameter decreased, the proportion of areas with velocities exceeding 20 m/s exhibited an increasing trend. In the measurement area of 490–910 mm from the nozzle, the proportion of medium-to-high-speed droplets in the range of 30-40 m/s and the proportion of high-speed droplets exceeding 40 m/s decreased to zero. Compared with the near-spray field (150–590 mm from the nozzle), the magnitude of reduction in the proportion of the speed range of 20–30 m/s increased with the increase of pressure and the decrease of outlet diameter. The proportion of 15-70 μm droplets increases first and then decreases with the increase of axial distance. The proportion of 15–70 μm droplets reached maximum when the pressure was 4 MPa and the outlet diameter was 1.2 mm. This study provides a new idea and method for comprehensive analysis of nozzle atomization characteristic.

Abstract Image

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基于PIV技术的喷雾场速度-粒径同步重建及分布分析

喷雾降尘技术是一种广泛应用于地下矿山的降尘方法，了解雾滴场分布特性对提高降尘效率至关重要。利用二维粒子图像测速技术（PIV）分析了不同喷嘴出口直径和压力条件下的速度场分布。利用MATLAB软件实现了喷雾图像中不同粒径颗粒的提取与分析。结果表明：随着供水压力的增大和喷嘴出口直径的减小，流速超过20 m/s的区域所占比例呈增加趋势；在距离喷嘴490 ~ 910 mm的测量区域内，30 ~ 40 m/s范围内的中高速液滴比例和超过40 m/s的高速液滴比例降至零。与近喷流场（距喷嘴150 ~ 590 mm）相比，随着压力的增大和出口直径的减小，20 ~ 30 m/s速度范围内的比例减小幅度增大。随着轴向距离的增加，15 ~ 70 μm的液滴比例先增大后减小；当压力为4 MPa，出口直径为1.2 mm时，15 ~ 70 μm的液滴比例最大。该研究为综合分析喷嘴雾化特性提供了新的思路和方法。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.