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Experimental and Numerical Failure Analysis of a Rotary Vacuum Disc Lime Filter - Part 1: Fluid Flow Study of Filtration Process 旋转式真空圆盘石灰过滤器的实验和数值故障分析 - 第 1 部分：过滤过程的流体流动研究
Technical Sciences Pub Date : 2024-07-19 DOI: 10.31648/ts.9549
W. Cieslakiewicz, D. Madyira, Marcos Roberto Rodrigues, Wilfrid Grimm, Dewald Scholtz
{"title":"Experimental and Numerical Failure Analysis of a Rotary Vacuum Disc Lime Filter - Part 1: Fluid Flow Study of Filtration Process","authors":"W. Cieslakiewicz, D. Madyira, Marcos Roberto Rodrigues, Wilfrid Grimm, Dewald Scholtz","doi":"10.31648/ts.9549","DOIUrl":"https://doi.org/10.31648/ts.9549","url":null,"abstract":"The mechanical separation of solids from liquids (filtration) is a critical process in many chemical process industries. The rotary drum filter can be considered a work-horse device which is one of the oldest filtration devices that has been used for centuries. Its reliability is affected by several process parameters leading to reduced life and poor separation effectiveness. Common problems include breakage of filtration medium, wear of filtration holes and breakage of the backing plates. In this work, a study is conducted to understand the causes of significant wear exhibited in one rotary drum vacuum filter to understand the process parameters that led to this failure. A record of the process parameters was recorded and used to validate a CFD (CCM+) model that was used to conduct a parametric study of the systems.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":" 1052","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141823184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EVALUATION OF THE INFLUENCE OF THE LASER ALLOYING WITH Cr, B AND Ni OF GREY IRON PARTS ON THEIR WEAR RESISTANCE 用激光对灰铁部件进行铬、硼和镍合金化处理对其耐磨性的影响评估
Technical Sciences Pub Date : 2024-06-13 DOI: 10.31648/ts.10064
M. Paczkowska
{"title":"EVALUATION OF THE INFLUENCE OF THE LASER ALLOYING WITH Cr, B AND Ni OF GREY IRON PARTS ON THEIR WEAR RESISTANCE","authors":"M. Paczkowska","doi":"10.31648/ts.10064","DOIUrl":"https://doi.org/10.31648/ts.10064","url":null,"abstract":"The aim of this research was to evaluate the influence of the laser alloying with Cr, Cr+B+Ni and B+Ni on the wear resistance of grey iron. Agricultural component (coulter flap) exposed on friction wear (as well as corrosion) in the soil has been take into account as a tested machine part. Even 85% decrease of mass loss of the coulter flap with laser alloyed layer (with nickel and boron) after wear test in comparison to mass loss of flap without laser treatment was achieved. In case of alloying with chromium it was 44% and in case of nickel, boron and chromium this decrease was 58%. Laser alloying in each perormed variant caused formation of the modified surface layer consisting of fine grains of mainly martensite enriched with alloy elements, increase of hardness of the surface layer and reduction of roughness parameters of the treated surface in comparison to the base surface.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"23 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neural network architectures in data sequence analysis: diagnosis of Reinke's oedema and Laryngeal polyps 数据序列分析中的神经网络架构：莱因克水肿和喉息肉的诊断
Technical Sciences Pub Date : 2024-06-10 DOI: 10.31648/ts.10228
Jarosław Szkoła
{"title":"Neural network architectures in data sequence analysis: diagnosis of Reinke's oedema and Laryngeal polyps","authors":"Jarosław Szkoła","doi":"10.31648/ts.10228","DOIUrl":"https://doi.org/10.31648/ts.10228","url":null,"abstract":"In this review paper, we focus our attention on presenting selected neural network architectures dedicated to the analysis of sequential data, in particular to support the diagnosis of Reinke's oedema and laryngeal polyps. The research discussed here is located in the area of clinical computer decision support systems (CDS) based on the use of artificial recurrent neural networks (RNNs) for speech signal analysis. RNNs are able to predict time series due to their memory and local recurrent connections. In the experimental part, Elman-Jordan artificial neural networks are used, whose characteristics are speed and accuracy in pattern learning allowing real-time decision-making. In the review presented here, one important theme is the use of Bezier curves for preprocessing the speech signal, leading to data reduction and noise elimination. Elman-Jordan networks significantly speed up the learning process and show high classification accuracy in laryngopathy diagnosis.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stand characteristics of the GTM 400 MOD turbojet engine GTM 400 MOD 涡轮喷气发动机的工作特性
Technical Sciences Pub Date : 2024-06-03 DOI: 10.31648/ts.10159
Lukasz Brodzik
{"title":"Stand characteristics of the GTM 400 MOD turbojet engine","authors":"Lukasz Brodzik","doi":"10.31648/ts.10159","DOIUrl":"https://doi.org/10.31648/ts.10159","url":null,"abstract":"Miniaturization of turbine jet engines not only enables testing of fuel mixtures but also opens up new possibilities for their use in smaller aircraft. In this work, measurements were carried out in the GTM 400 MOD engine in order to create the stand characteristics of unit thrust and specific fuel consumption. For both parameters, polynomials were determined describing their changes in the range of rotational speeds used. The work is the first stage of research under the rector's grant. Its goal is to create a hybrid turbojet engine powered by aviation kerosene and hydrogen. The reason for the research is to check the possibility of using hydrogen in turbomachinery engines. Hydrogen is one of the fuel additives approved for use by the European Union, which forces the aviation industry to reduce exhaust emissions into the atmosphere. Hydrogen can not only enrich aviation kerosene but also become an alternative fuel.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"53 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Transition Finite Elements in hpq-Adaptive Modeling and Analysis of Machine Elements 过渡有限元在机器元件 hpq 自适应建模和分析中的应用
Technical Sciences Pub Date : 2024-04-12 DOI: 10.31648/ts.9545
Magdalena Zielińska, G. Zboiński
{"title":"Application of Transition Finite Elements in hpq-Adaptive Modeling and Analysis of Machine Elements","authors":"Magdalena Zielińska, G. Zboiński","doi":"10.31648/ts.9545","DOIUrl":"https://doi.org/10.31648/ts.9545","url":null,"abstract":"This paper concerns modeling and analysis of machine elements using the adaptive finite element method. The adaptation used is of hpq type, which means that the finite element dimension h and element transverse q and longitudinal p approximation order may be different in each element. These parameters are determined automatically by the program so as to obtain modelling and approximation error levels not higher than the assumed admissible level of the errors. The presented paper focuses on the use of transition elements between basic elements corresponding to the three-dimensional theory of elasticity and the first-order shell model. Three applied transition elements differ in their assumptions regarding the continuity of the displacement, strain and stress fields between the basic models. The effectiveness of the application of transition elements was assessed in terms of: removal of the internal boundary layer at the boundary between the models and convergence of adaptive solutions taking into account these models.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140708972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of pressure-loss evaluation fidelity in turbulent energy dissipation models of poppet check valves using computational fluid dynamics (CFD) software 使用计算流体动力学 (CFD) 软件对提升式单向阀湍流能量耗散模型的压力损失评估保真度进行比较
Technical Sciences Pub Date : 2024-02-12 DOI: 10.31648/ts.9732
Maciej Jerzy Kobielski, Wojciech Skarka, Michał Skarka
{"title":"Comparison of pressure-loss evaluation fidelity in turbulent energy dissipation models of poppet check valves using computational fluid dynamics (CFD) software","authors":"Maciej Jerzy Kobielski, Wojciech Skarka, Michał Skarka","doi":"10.31648/ts.9732","DOIUrl":"https://doi.org/10.31648/ts.9732","url":null,"abstract":"Check valves are critical components of fluid systems and have various applications, including house appliances. This article presents a methodology for mapping geometry-specific constriction pressure loss as a function of flow and turbulence in a check valve. This study aimed to gain insight on which Ansys Fluent available turbulent energy dissipation model should be used for further design optimization. This methodology consists of a statistical comparison of computational fluid dynamics (CFD) simulation results obtained using the turbulent energy dissipation models. The key components of the simulation process are discussed. The study’s main results are a comparison of empirical results among flow models’ estimated pressure loss, shown as a function of flow rate in specific geometry and identification of the most suitable model for the considered application. This study concludes that the K-Epsilon (Standard) model best represents the empirically measured behavior of naturally occurring flow energy losses in the considered geometry.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"74 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139895222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Concept and preliminary calculations of an optionally piloted research platform 选择性试点研究平台的概念和初步计算
Technical Sciences Pub Date : 2024-01-29 DOI: 10.31648/ts.8611
Paulina Zenowicz, Kamil Zenowicz, Wojciech Skarka
{"title":"Concept and preliminary calculations of an optionally piloted research platform","authors":"Paulina Zenowicz, Kamil Zenowicz, Wojciech Skarka","doi":"10.31648/ts.8611","DOIUrl":"https://doi.org/10.31648/ts.8611","url":null,"abstract":"Along with the technological progress, unmanned aerial vehicles have found application not only in a military, but also in civil applications. The article presents Concept and preliminary calculations of an optionally piloted research platform. A literature review revealed a small number of existing aircraft of similar design. The analysis began with basic analytical calculations for airplanes, and more specifically their wings. The initial concept of the external shape of the designed aircraft was determined, and then the initial optimization of the structure was carried out on the basis of mathematical and computer analysis. Another goal of the research will be the construction of a demonstrator and its analysis.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"5 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140489676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Geometric models for analyzing the shape of cauliflower heads 分析花椰菜头部形状的几何模型
Technical Sciences Pub Date : 2024-01-11 DOI: 10.31648/ts.9160
Andrzej Anders, K. Jadwisieńczak, D. Choszcz
{"title":"Geometric models for analyzing the shape of cauliflower heads","authors":"Andrzej Anders, K. Jadwisieńczak, D. Choszcz","doi":"10.31648/ts.9160","DOIUrl":"https://doi.org/10.31648/ts.9160","url":null,"abstract":"Selected geometric properties of cauliflower heads cv. Gohan F1 were analyzed by building numerical models with the use of a 3D scanner. Geometric models of cauliflower heads were developed in ScanStudio HD PRO, FreeCAD, and MeshLab programs. Five geometric models describing the shape of cauliflower heads were generated with the use basic geometric figures and drawing tools in FreeCAD. The geometry of numerical models and geometric models was compared in GOM Inspect. The surface area, volume, and detailed geometric dimensions of the developed models were determined. The deviations in cauliflower dimensions calculated by geometric models were mapped. The surface area, volume, and geometric dimensions of cauliflower heads were most accurately represented by the model generated with the Quadric Edge Collapse Decimation (QECD) function. In this model, the relative error of surface area measurements did not exceed 5%, and the relative error of volume measurements did not exceed 4%. This model was also characterized by the smallest average maximum deviation (+) and the smallest average minimum deviation (-) which was estimated at 8%. The proposed geometric model can be used for research and design purposes.","PeriodicalId":516879,"journal":{"name":"Technical Sciences","volume":"49 11-12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140510257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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