Powder Technology最新文献_第7页

Lightweight mask R-CNN for instance segmentation and particle physical property analysis in multiphase flow 用于多相流中实例分割和颗粒物理性质分析的轻量级掩模 R-CNN

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120366

Mingxiang He , Kexin He , Qingshan Huang , Hang Xiao , Haidong Zhang , Guan Li , Aqiang Chen

{"title":"Lightweight mask R-CNN for instance segmentation and particle physical property analysis in multiphase flow","authors":"Mingxiang He , Kexin He , Qingshan Huang , Hang Xiao , Haidong Zhang , Guan Li , Aqiang Chen","doi":"10.1016/j.powtec.2024.120366","DOIUrl":"10.1016/j.powtec.2024.120366","url":null,"abstract":"<div><div>A lightweight Mask R-CNN instance segmentation model was developed here to analyze particle size and shape accurately and quickly. Firstly, a hybrid Depthwise Dilated Convolutional Network (DDNet) is proposed, and the feature pyramid layers and the shared convolutional layers of the region proposal network are simplified, reducing the model complexity while ensuring robust feature extraction capabilities. Then, segmentation accuracy is significantly improved without sacrificing computational speed and performance by introducing the Dice loss function and clustering algorithm. Experimental results show that the model parameters are significantly reduced by 49.46%, and the segmentation speed increases from 2.15 FPS (frames per second) to 5.88 FPS. Meanwhile, the segmentation accuracy (AP50) increased from 90.56% to 91.21%. In addition, it was proven that the particle size distribution and shape could be analyzed accurately and rapidly with the proposed model, providing essential information for multiphase flow process optimization and equipment design in industrial applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120366"},"PeriodicalIF":4.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suppression characteristic of three inhibitors on the flame propagation of titanium dust layer 三种抑制剂对钛粉尘层火焰传播的抑制特性

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120368

Yongxu Wang , Jing Zhang , Zhongkun Yang , Bin Li , Lifeng Xie , Yong Cao

{"title":"Suppression characteristic of three inhibitors on the flame propagation of titanium dust layer","authors":"Yongxu Wang , Jing Zhang , Zhongkun Yang , Bin Li , Lifeng Xie , Yong Cao","doi":"10.1016/j.powtec.2024.120368","DOIUrl":"10.1016/j.powtec.2024.120368","url":null,"abstract":"<div><div>The suppression effect of three inhibitors (TiO<sub>2</sub>, NaHCO<sub>3</sub>, and NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub>) on the flame propagation of titanium dust layer is investigated in the self-made experimental system. Both camera and infrared images are used to record the effect of the inhibitor on the flame propagation process of titanium/inhibitors powder. The combustion products of three inhibitor/Ti dusts are analyzed to suppression mechanism of inhibitors. The effect of three inhibitors on the ignition induction time of the titanium powder is studied. The decomposition process of NaHCO<sub>3</sub> and NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> and the production of gas under high temperature conditions may be the main reason for accelerating the flame propagation. The multiple high temperature regions in the dust layer can accelerate the flame propagation rate. Suppression mechanisms of three inhibitors are explained in detail. The inhibition mechanism of TiO<sub>2</sub> mainly lies in its strong thermal stability. The inhibition effects of NaHCO<sub>3</sub> and NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> include the dilution process and the decomposition process.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120368"},"PeriodicalIF":4.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural properties and mechanical behavior of three-dimensional cylindrical particle-like systems under in situ loading 原位加载下三维圆柱形类粒子系统的结构特性和力学行为

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120365

YanJi Gu , FanXiu Chen , Yang Yu , Chao Cui , Yuan Zhang , JingLan Liu , ZiMing Qiu

{"title":"Structural properties and mechanical behavior of three-dimensional cylindrical particle-like systems under in situ loading","authors":"YanJi Gu , FanXiu Chen , Yang Yu , Chao Cui , Yuan Zhang , JingLan Liu , ZiMing Qiu","doi":"10.1016/j.powtec.2024.120365","DOIUrl":"10.1016/j.powtec.2024.120365","url":null,"abstract":"<div><div>To investigate the mechanical behavior of granular systems and their impact on density uniformity during compression, a three-dimensional micro-CT in situ loading experiment was conducted on a cylindrical granular system. The granular system was subjected to tomographic scanning and reconstruction, and the variation patterns of structural parameters such as volume fraction, porosity, and intrinsic density during the in situ loading process were analyzed. Internal pores within the granular system were extracted to obtain changes in pore area at each layer, allowing for an analysis of the evolving patterns of layered pore areas across different regions of the granular system during loading. This characterization elucidated the dynamic evolution process of compaction within the granular system. A contact network model for the granular system was established using particle contact area as a representation of inter-particle contact forces, revealing inherent connections between particle contact networks and macroscopic mechanical behaviors within the granular system.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120365"},"PeriodicalIF":4.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-driven system identification and model predictive control of pneumatic conveying using nonlinear dynamics analysis for optimised energy consumption 利用非线性动力学分析对气力输送进行数据驱动的系统识别和模型预测控制，优化能源消耗

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120364

Osamh S. Alshahed , Baldeep Kaur , Michael S.A. Bradley , David Armour-Chelu

{"title":"Data-driven system identification and model predictive control of pneumatic conveying using nonlinear dynamics analysis for optimised energy consumption","authors":"Osamh S. Alshahed , Baldeep Kaur , Michael S.A. Bradley , David Armour-Chelu","doi":"10.1016/j.powtec.2024.120364","DOIUrl":"10.1016/j.powtec.2024.120364","url":null,"abstract":"<div><div>Pneumatic conveying systems provide secure transportation of particulate material and a dust-free environment. These systems face high energy consumption, material degradation, and pipeline blockages. This research presents an innovative solution by integrating nonlinear dynamics analysis of electrostatic sensor data, including chaos and recurrence quantification analysis, sparse identification of nonlinear dynamics with control (SINDYc) and model predictive control (MPC). The Lyapunov exponent, approximate entropy and recurrence rate of electrostatic sensor data reveal the chaotic nature of gas-solid flows. MPC framework was tailored for real-time optimisation of a pneumatic conveying system. SINDYc system models were developed using data collected from an open-loop control pneumatic conveying process to conduct MPC simulations and select an appropriate model for real-time control. This research illustrates the potential of integrating nonlinear dynamics analysis, SINDYc integrated and MPC for enhanced system performance, showcased a significant reduction in energy consumption without compromising the system's efficiency or reliability.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120364"},"PeriodicalIF":4.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishment of particle motion model and study of particle volume fraction distribution in the turbo air classifier based on DSMC 基于 DSMC 的涡轮空气分级机中颗粒运动模型的建立和颗粒体积分数分布研究

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120371

Kerun Liu, Yuan Yu

引用次数: 0

Influence of components on methane micropore filling capacity of low-rank coal 成分对低阶煤甲烷微孔填充能力的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-16 DOI: 10.1016/j.powtec.2024.120363

Fang Zhang , Jingyu Jiang , Chenghao Wang , Yuanping Cheng , Xiaobin Dong , Jian Wu

{"title":"Influence of components on methane micropore filling capacity of low-rank coal","authors":"Fang Zhang , Jingyu Jiang , Chenghao Wang , Yuanping Cheng , Xiaobin Dong , Jian Wu","doi":"10.1016/j.powtec.2024.120363","DOIUrl":"10.1016/j.powtec.2024.120363","url":null,"abstract":"<div><div>N<sub>2</sub>/CO<sub>2</sub> adsorption methods were used to measure pore characteristics of low-rank coal, and methane isothermal adsorption experiments were conducted for further evaluation. Results from N<sub>2</sub> adsorption experiments reveal that the pore size ranges from 1.03 to 3.26 nm, with pore volumes (PVs) of 0.006–0.013 cm<sup>3</sup>/g The CO<sub>2</sub> adsorption experiments reveal that the micropore size distribution is 0.479–0.548 nm, with PVs of 0.026–0.056 cm<sup>3</sup>/g. The methane isothermal adsorption experiments shows that the maximum adsorption volume is 12.82–28.68 cm<sup>3</sup>/g. The micropore filling theory developed for medium to high-rank coals shows that over 94.71 % of methane is stored in micropores, validating its applicability to low-rank coal. Through theoretical analysis and calculations, a dimensionless expression has been derived for the relationship between the micropore filling capacity of methane in low-rank coal and the content of its various components. This study offers a theoretical foundation for outburst prevention of gas in low-rank coal mining regions.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120363"},"PeriodicalIF":4.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An equivalent model of horizontal vibratory finishing process: Model construction and analysis based on similarity theory 水平振动光饰工艺的等效模型：基于相似性理论的模型构建与分析

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-15 DOI: 10.1016/j.powtec.2024.120362

Xuejie Wen , Wenhui Li , Xiuhong Li , Haizhu Wang , Liaoyuan Zhang , Shengqiang Yang

{"title":"An equivalent model of horizontal vibratory finishing process: Model construction and analysis based on similarity theory","authors":"Xuejie Wen , Wenhui Li , Xiuhong Li , Haizhu Wang , Liaoyuan Zhang , Shengqiang Yang","doi":"10.1016/j.powtec.2024.120362","DOIUrl":"10.1016/j.powtec.2024.120362","url":null,"abstract":"<div><div>The manufacturing cost of parts and experimental equipment seriously limits the development of experimental research on mass finishing. To tackle this issue, an equivalent model construction method was proposed based on similarity theory. First, the similarity criterion of relevant physical quantities in horizontal vibratory finishing was determined, and the calculation formula of the distortion coefficient was derived to correct the prediction results. Second, the effects of vibration parameters on the characteristics and similarities of particle velocity and normal force were analyzed by DEM simulation. Finally, the validity of the equivalent model was proved by PIV and force tests. The results show that the equivalent model can be used to reflect the variation of the actual model and anticipate the particle velocity and normal force. And the prediction accuracy can reach 99.56 % and 97.46 %, respectively. The research results provide a new efficient and low-cost method for researching the mass finishing process.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120362"},"PeriodicalIF":4.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable strategy for high-efficiency flotation of fine low-rank coal: Eco-friendly composite collector prepared from waste oil 低阶细煤高效浮选的可持续战略：利用废油制备环保型复合捕收剂

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-13 DOI: 10.1016/j.powtec.2024.120360

Xi-guang Li , Qiang Gao , Chun-chen Nie , Xiang-nan Zhu , Yong-qiang Zhao

引用次数: 0

Modeling hard rock breakage behavior influenced by the tipped hob cutter's tooth structure using the 2D discrete element (DE) model 使用二维离散元素 (DE) 模型模拟受刀齿结构影响的硬岩破碎行为

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-12 DOI: 10.1016/j.powtec.2024.120361

Zhenyu Wang , Jinghui Tong , Xin Zhang , Feng Sheng , Yongqin Gao , Kehong Zheng , Bingjing Qiu

引用次数: 0

A numerical assessment of different geometries for reducing elbow erosion during pneumatic conveying 对减少气力输送过程中弯头侵蚀的不同几何形状进行数值评估

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-10-10 DOI: 10.1016/j.powtec.2024.120357

Eric Drescher , Shoya Mohseni-Mofidi , Claas Bierwisch , Harald Kruggel-Emden

{"title":"A numerical assessment of different geometries for reducing elbow erosion during pneumatic conveying","authors":"Eric Drescher , Shoya Mohseni-Mofidi , Claas Bierwisch , Harald Kruggel-Emden","doi":"10.1016/j.powtec.2024.120357","DOIUrl":"10.1016/j.powtec.2024.120357","url":null,"abstract":"<div><div>This paper investigates wear characteristics in a dilute phase pneumatic conveying pipe system using a Euler-Lagrange method. Simulations couple computational fluid dynamics (CFD) with the discrete element method (DEM) to analyze three different bend geometries, including two erosion-reducing designs and a standard bend, all with an effective bend radius to pipe diameter ratio (R/D) of 1.5. SiO<sub>2</sub> particles, 1 mm in diameter, are conveyed at gas velocities of 15 to 30 m/s and mass loadings of 1 to 4 kg<sub>particle</sub>/kg<sub>gas</sub>. The CFD-DEM predictions were validated against experimental data, showing good agreement in erosion distribution. The study evaluates erosion rates, pressure drops, and particle stressing for the three bends. Results suggest that certain bend designs significantly reduce erosion while slightly increasing pressure drop, although reduced particle-wall erosion may increase the overall particle stressing. The obtained results provide guidance on selecting an appropriate bend design and for potential geometry optimizations.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120357"},"PeriodicalIF":4.5,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0