Article
Engineering, Aerospace
Miroslav Spodniak, Michal Hovanec, Peter Korba
Summary: This paper proposes a method based on artificial neural networks to predict the mechanical properties of the turbine section in jet engines. By measuring temperature, pressure, and rpm, the artificial neural network is trained using finite element analysis results to accurately predict mechanical stress. This method significantly reduces solving time compared to traditional finite element methods.
Article
Materials Science, Coatings & Films
Z. Y. Liu, L. Yang, Y. C. Zhou
Summary: A multiscale life prediction model integrating artificial neural networks was developed to predict the failure of turbine blade coatings. The model considers the complex microstructure and multiphysics failure mechanisms, and takes into account factors like oxidation, creep, thermal mismatch, gas and coolant conditions, film cooling, and TBCs. The model shows better prediction accuracy on interface oxidation, damage evolution, and failure region of TBCs on turbine vane. The study also highlights the coupled effect of thermal, oxide growth, and thermal mismatch on TBCs failure of turbine vane.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Debin Sun, Guoli Ma, Zhenhua Wan, Jinhai Gao
Summary: This study focuses on the creep-fatigue interaction damage failure problem of turbine blades in aeronautical engineering. The creep-fatigue life prediction model of turbine blade material was constructed based on the modified Kachanov-Rabotnov-Chaboche (MKRC) damage mechanics theory, with the experimental verification of nickel-based superalloy DZ125. The creep-fatigue interaction behavior was also investigated. Additionally, a creep-fatigue life prediction model of turbine blade structure was proposed, considering the shape, size, and microscopic defect difference effect. The research results show that creep and fatigue interact with each other in the form of effective stress, and the creep-fatigue life prediction model has a high life prediction ability.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Thermodynamics
Qiuwan Du, Yunzhu Li, Like Yang, Tianyuan Liu, Di Zhang, Yonghui Xie
Summary: This paper achieves the goal of fast design optimization of turbine blades through deep learning methods. The proposed parameterization methods and dual convolutional neural network model enable accurate performance prediction and aerodynamic performance optimization.
Article
Materials Science, Multidisciplinary
Zhen Li, Zhixun Wen, Haiqing Pei, Xiaowei Yue, Pu Wang, Changsheng Ai, Zhufeng Yue
Summary: This study conducted creep tensile tests and established creep constitutive equations based on crystal plasticity theory. By combining FSI heat transfer analysis, it revealed the creep failure process of turbine blades, showing the deformation after failure and determining the creep life of the blades.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Toshimitsu Tetsui
Summary: This study investigated the effects of microstructure on impact resistance and machinability of TiAl alloys using Ti-Al-Cr ternary alloys. Six types of typical microstructures were confirmed by varying Al and Cr concentrations and heat-treatment conditions. Coarse FL had the best impact resistance but poor machinability, while gamma had the best machinability but the weakest impact resistance. caution should be exercised when using gamma microstructure in other engines with different operating environment, and the microstructure containing the fi phase is inferior in all aspects.
Article
Engineering, Environmental
Feiyu Li, Hongmei Cui, Hongjie Su, Iderchuluun, Zhipeng Ma, YaXiong Zhu, Yong Zhang
Summary: The study shows that ice accumulation on wind turbine blades can lead to different natural frequency variations. By conducting experiments and establishing relationships, a method for predicting the ice location and ice mass of the iced blade has been proposed.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
T. Yamagata, M. Hasegawa, N. Fujisawa
Summary: The erosion behavior of an aluminum material was investigated using a pulsed-jet erosion facility for wind turbine blades, where the droplet behavior was simulated by a liquid slug. The erosion behavior of the facility was characterized by measuring the jet-slug velocity along the jet axis and the volumetric loss of the material at different jet velocities. Experimental results showed that the impact velocity was approximately 20% smaller than the nozzle exit velocity obtained from flow rate measurement. This emphasizes the importance of impact velocity measurement for erosion tests, which has been neglected in prior studies. Additionally, the power law constant of the velocity dependency on the erosion rate in the pulsed-jet facility matched that of droplet impact tests in other facilities, supporting the reliability of the pulsed-jet facility in simulating rain-erosion behavior for wind turbine blades.
Article
Engineering, Mechanical
Artur Movsessian, David Garcia Cava, Dmitri Tcherniak
Summary: This study presents a novel artificial neural network (ANN) based methodology for robust damage detection within a vibration-based structural health monitoring framework. The method establishes nonlinear relationships between damage sensitive features and novelty indices, using prediction error as a new index. The results demonstrate improved damage detectability in various scenarios, despite the influence of environmental and operational variables.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Thermodynamics
Marius Forster, Bernhard Weigand
Summary: This study demonstrates through experimental and numerical heat transfer investigation that exposure of an impingement jet array to a crossflow decreases stagnation point heat transfer and overall heat transfer, but homogenizes local heat transfer distribution; a smaller separation distance enhances crossflow effects and generally increases heat transfer level.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Energy & Fuels
Omer Boyukdipi, Gokhan Tuccar, Hakan Serhad Soyhan
Summary: The experimental study investigated the effects of NH3 as a fuel additive on engine vibration parameters, revealing that increasing levels of NH3 additive led to increased engine vibration and had a negative impact on engine vibration when blended with sunflower biodiesel. High accuracy rates were achieved in predicting vibration data through artificial neural networks models.
Article
Green & Sustainable Science & Technology
Rustem Manatbayev, Zhandos Baizhuma, Saltanat Bolegenova, Aleksandar Georgiev
Summary: The study focuses on the icing effects and ice accretion shapes on vertical axis wind turbines. Results show that ice shapes under different angles of attack significantly affect aerodynamic performance, especially in glaze ice conditions.
Article
Multidisciplinary Sciences
Abdullah Al Noman, Zinat Tasneem, Sarafat Hussain Abhi, Faisal R. Badal, Md Rafsanzane, Md Robiul Islam, Firoz Alam
Summary: The main goal of this study is to investigate whether ANN-based virtual clones can determine the performance of SWTs in a shorter timeframe and with minimal resources compared to traditional methods. The proposed model has a fidelity of over 98% when validated with experimental data. It produces results in one-fifth the time of the existing simulation method and identifies the optimized point in the dataset for enhancing turbine performance.
Article
Green & Sustainable Science & Technology
Thochi Seb Rengma, P. M. V. Subbarao
Summary: In this study, an optimized geometry of a semi-circular Savonius Hydro-Kinetic Turbine (SHKT) was proposed through 3D CFD simulations, artificial neural network optimization, and experiments. The results showed that the optimized blade had a higher efficiency compared to the semi-circular blades and is recommended for applications in hydro farms and turbine clusters.
Article
Engineering, Mechanical
Halit Yasar, Gultekin Cagil, Orhan Torkul, Merve Sisci
Summary: Engine tests are costly and time consuming, but using Deep Learning methods can predict engine characteristics accurately, reducing testing costs and accelerating development. A study predicting cylinder pressure with Deep Neural Network showed a high accuracy of 99.84%, demonstrating the effectiveness of Deep Learning in predicting engine pressures.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Pavol Lipovsky, Katarina Draganova, Jozef Novotnak, Zoltan Szoke, Martin Fil'ko
Summary: Unmanned aerial vehicles (UAVs) are being used in various applications, including magnetic field mapping. Ultrasound-aided navigation can enhance indoor UAV flight planning accuracy and help identify risk areas. This technology also provides valuable information on technical cleanliness through understanding the spatial distribution of magnetic fields.
Article
Green & Sustainable Science & Technology
Katarina Draganova, Karol Semrad, Monika Blist'anova, Tomas Musil, Rastislav Jurc
Summary: The coronavirus has significantly impacted air transportation by restricting it and reducing it considerably. This article explores the effects of disinfectants on rubber materials used in aircraft infrastructure, using Weibull analysis and CAE analysis to predict conveyor belt lifetime and evaluate material characteristics. The study suggests that the use of disinfectants can lead to mechanical damage on conveyor belts, necessitating maintenance or repair intervals.
Article
Computer Science, Information Systems
Peter Koscak, L'ubomir Ambrisko, Karol Semrad, Daniela Marasova, Vladimir Mitrik
Summary: To study the impact of baggage on conveyor belts, monitoring the tensile strength of light baggage conveyor belts, comparing the results with CAE analysis, and determining the optimal material model are essential.
TEM JOURNAL-TECHNOLOGY EDUCATION MANAGEMENT INFORMATICS
(2021)
Article
Green & Sustainable Science & Technology
Karol Semrad, Katarina Draganova
Summary: This article discusses the sustainability and environmental friendliness of pipe belt conveyors, and introduces the use of microwires as sensing elements for mechanical load diagnostics. The study finds that the thickness of the glass coating significantly affects the lifetime of the microwires, while the length of the microwires has negligible influence on the number of bending cycles until damage occurs.
Article
Chemistry, Multidisciplinary
Michal Hovanec, Peter Korba, Miroslav Spodniak, Samer Al-Rabeei, Branislav Racek
Summary: The main objective of this study was to develop a new method for stress prediction and apply it to an aircraft torque tube during operation. The method uses a neural network to calculate stress in real time during taxiing, takeoff, and landing. The stress calculated by this method can be used for calculating fatigue life and saving maintenance costs. The main contribution of this study is the development of a fast and accurate method for mechanical-stress prediction using a neural network.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Multidisciplinary
Miroslav Spodniak, Jozef Novotnak, Frantisek Hesko
Summary: This article focuses on determining the natural frequencies of turbine blades in aircraft jet engines. Three methods are described for this purpose: acoustic method, measuring vibrations using an accelerometer, and finite element method modal analysis. The results and advantages/disadvantages of each method are compared in the conclusion section.
ACTA POLYTECHNICA HUNGARICA
(2021)
Article
Engineering, Multidisciplinary
Miroslav Spodniak, Ladislav Fozo, Rudolf Andoga, Karol Semrad, Karoly Beneda
Summary: Jet engines are popular in aircraft propulsion, and the challenge for designers is to create reliable and powerful propulsion units. Water injection into the compressor is a method for increasing thrust.
ACTA POLYTECHNICA HUNGARICA
(2021)
Proceedings Paper
Engineering, Aerospace
D. Polak, M. Hovanec, P. Korba, K. Semrad, S. A. S. Al-Rabeei, M. Golisova, P. Gasparovic
2020 NEW TRENDS IN AVIATION DEVELOPMENT (NTAD): XV INTERNATIONAL SCIENTIFIC CONFERENCE NTINAD
(2020)
Article
Metallurgy & Metallurgical Engineering
K. Draganova, K. Semrad, L. Fozo, M. Spodniak, R. Jurc