{"title":"Investigation on aluminum dust explosion in pneumatic conveying pipelines","authors":"Shikai Bao, Haoran Zhao, Xiaozhe Yu, Jinglin Zhang, Lingfeng Wang, Zhengdong Liu, Gang Li, Chunmiao Yuan","doi":"10.1016/j.ijthermalsci.2025.110315","DOIUrl":null,"url":null,"abstract":"<div><div>Understanding the initiation of dust explosions in industrial-scale pneumatic conveying pipelines is crucial for reducing explosion risks in dust-handling industries. This study uses fluid dynamics and heat and mass transfer theory to propose a numerical simulation method for the explosion process of aluminum dust in high-speed industrial pneumatic conveying pipelines. It reveals how different airflow velocities and dust concentrations affect the behavior of aluminum dust explosions in terms of flame propagation and pressure. The research findings indicate that as airflow velocity increases, both the maximum flame propagation speed and maximum explosion pressure initially rise before declining. Maximum explosion pressures at different airflow velocities exhibit a peak at 700 g/m<sup>3</sup> dust concentration. Additionally, the study elucidates the reasons for flame acceleration within the pipelines and the mechanisms through which airflow velocity influences explosion dynamics. This research provides valuable insights for managing the risk of dust explosions in industrial pneumatic conveying pipelines, offering a basis for implementing effective risk control measures in industrial production.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"220 ","pages":"Article 110315"},"PeriodicalIF":5.0000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermal Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1290072925006386","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Understanding the initiation of dust explosions in industrial-scale pneumatic conveying pipelines is crucial for reducing explosion risks in dust-handling industries. This study uses fluid dynamics and heat and mass transfer theory to propose a numerical simulation method for the explosion process of aluminum dust in high-speed industrial pneumatic conveying pipelines. It reveals how different airflow velocities and dust concentrations affect the behavior of aluminum dust explosions in terms of flame propagation and pressure. The research findings indicate that as airflow velocity increases, both the maximum flame propagation speed and maximum explosion pressure initially rise before declining. Maximum explosion pressures at different airflow velocities exhibit a peak at 700 g/m3 dust concentration. Additionally, the study elucidates the reasons for flame acceleration within the pipelines and the mechanisms through which airflow velocity influences explosion dynamics. This research provides valuable insights for managing the risk of dust explosions in industrial pneumatic conveying pipelines, offering a basis for implementing effective risk control measures in industrial production.
期刊介绍:
The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review.
The fundamental subjects considered within the scope of the journal are:
* Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow
* Forced, natural or mixed convection in reactive or non-reactive media
* Single or multi–phase fluid flow with or without phase change
* Near–and far–field radiative heat transfer
* Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...)
* Multiscale modelling
The applied research topics include:
* Heat exchangers, heat pipes, cooling processes
* Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries)
* Nano–and micro–technology for energy, space, biosystems and devices
* Heat transport analysis in advanced systems
* Impact of energy–related processes on environment, and emerging energy systems
The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.