Experimental and numerical simulations on the deflagration of corn starch dust flames under the influence of pipeline inclination angles and dust cloud concentrations

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-20 DOI:10.1016/j.powtec.2025.120946

Jinglin Zhang , Lianghui Guo , Zhenguo Du , Shikai Bao , Chang Li , Zhiyang Zhang , Gang Li , Chunmiao Yuan

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Abstract

Pipeline systems, which are commonly seen in the processes of grain dust processing and transportation, are significant sources of dust explosion accidents. The influence of pipeline inclination angles and dust cloud concentrations within the pipeline on the combustion characteristics of corn starch dust clouds was explored using CFD simulation techniques and experiments. The results indicate that the increase in pipeline bending angles will impose a significant hindrance on the deflagration propagation of corn starch dust within the pipeline, which further impedes the release of explosives in the container. This, in turn, augments the turbulent kinetic energy in the container, leading to an increase in both the maximum flame spread velocity (MFSV) and average flame spread velocity (AFSV) within the pipeline. And such an increasing effect exists under any dust cloud concentrations. The flame propagation process obtained through numerical simulation is basically consistent with that of the experiment. Furthermore, under any condition of pipeline bending angles, with the increase in dust cloud concentration, the flame spread velocity (FSV) generally shows a propensity to first rising and then declining.

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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.