Particle production comparison between the conventional and blade-designed two-fluid pressure nozzles via CFD simulation

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-07 DOI:10.1016/j.powtec.2025.120747

Che-Hao Hsu , Hong-Ping Cheng , Kuang-Hsiang Liu , Chien-Hsun Lee , Chin-Chi Cheng

引用次数: 0

Abstract

This study investigates particle production characteristics in two different nozzle designs: a conventional pressure twin-fluid nozzle and a blade-designed nozzle, to enhance nozzle productivity. Simulations were conducted under two conditions using water as a Newtonian liquid (viscosity 1 mPa·s), fixed air velocity (178 m/s), and constant pressure (1 bar). Case 1 involved a liquid mass flow rate of 50 kg/h, while Case 2 varied the rate at 20, 35, and 50 kg/h, with Gas to Liquid Ratio(GLR) of 0.7, 0.4, and 0.28 respectively. Results indicate that nozzle design significantly influences velocity distribution and mixing behavior. In the blade-designed nozzle, the dispersed blade outlet directs internal gas flow prior to expulsion, reducing velocity stratification and enhancing gas-liquid interaction near the exit. This design achieves a broader atomization range and more uniform particle size distribution at certain regions.

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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.