Experimental study on the agglomeration of fire smoke by flow-sound-separation Hartmann whistle with swirl characteristics

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-24 DOI:10.1016/j.powtec.2025.120835

Weihua Li, Guangxue Zhang, Shu Liu, Sirui Tong, Dingkun Yuan, Yunchao Li, Hailin Gu, Jiangrong Xu

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引用次数: 0

Abstract

Acoustic air-jet generators show great potential in eliminating fire smokes. In this paper, to enhance the agglomeration performance and minimize the negative impact of exhaust airflow, a novel Hartmann whistle structure with swirl characteristics is designed. Experimental results indicate that the swirl blades have minimal effect on the fundamental frequency but reduce the sound amplitude as the blade size increases. When the blade height exceeds a certain size, the sound amplitude significantly drops. Compared to the structure without blades, the blades at the nozzle increase agglomeration efficiency by 24.5 % - 44.2 %, while the blades at the horn throat increase it by 21.4 % - 31.2 %. Overall, the agglomeration effect of the sound source with swirl blades decreases as the side opening sizes increase. In contrast, the sound source without blades shows a trend of first increasing and then decreasing, reaching the maximum at the flow-sound-separation point.

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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.