Arabian Journal for Science and Engineering最新文献_第8页

Measurements of Flow Characterization Revealing Transition to Turbulence Associated with the Partial Flexibility-Based Flow Control at Low Reynolds Number 流量特性测量揭示了低雷诺数时基于部分柔性的流量控制向湍流的过渡

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-26 DOI: 10.1007/s13369-024-09349-z

Kemal Koca, Sinem Keskin, Rumeysa Şahin, Dhamotharan Veerasamy, Mustafa Serdar Genç

{"title":"Measurements of Flow Characterization Revealing Transition to Turbulence Associated with the Partial Flexibility-Based Flow Control at Low Reynolds Number","authors":"Kemal Koca, Sinem Keskin, Rumeysa Şahin, Dhamotharan Veerasamy, Mustafa Serdar Genç","doi":"10.1007/s13369-024-09349-z","DOIUrl":"https://doi.org/10.1007/s13369-024-09349-z","url":null,"abstract":"In order to comprehend the flow characteristics of both controlled and uncontrolled SD7062 wind turbine airfoils with local flexible membrane material throughout a variety of angles of attack at a Reynolds number of 1.05 × 105, an experimental investigation was conducted. The time-dependent force measurement, the hot-wire experiment with a boundary layer and glue-on probes, and the oil-flow visualization technique were all utilized in the present study to measure the flow over the airfoil and examine the laminar-turbulent transition, laminar separation bubble, and the impact of a special flow control method that uses flexibility. A comprehensive intermittency analysis by utilizing hot-wire results was employed to obtain the flow physics effects of the local flexibility the first in the literature. The key results of the experiment demonstrated that the stall was delayed from α = 10° to 12° by the local flexibility. The hot-wire results are dedicated to laminar, transitional and turbulent regions and the transition phenomena at different locations over the suction surface of the airfoil in the analysis graphs. As demonstrated by the results of the oil-flow visualization experiment, in the uncontrolled case, the laminar separation bubble formed over the airfoil at α = 8° between x/c = 0.16 and x/c = 0.42. The use of flexible membrane material over the airfoil provided that the oscillation of this material triggered the transition to turbulence and a bypass transition, which resulted in the reattached flow.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extended Sliding Mode Observer-Based Output Constraint Nonlinear Control Scheme for Electro-hydraulic Actuators with System Uncertainties 具有系统不确定性的电液致动器的基于滑动模式观测器的扩展输出约束非线性控制方案

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-26 DOI: 10.1007/s13369-024-09285-y

Wanshun Zang, Gang Shen, Kejiang Zang, Xiao Chen

{"title":"Extended Sliding Mode Observer-Based Output Constraint Nonlinear Control Scheme for Electro-hydraulic Actuators with System Uncertainties","authors":"Wanshun Zang, Gang Shen, Kejiang Zang, Xiao Chen","doi":"10.1007/s13369-024-09285-y","DOIUrl":"https://doi.org/10.1007/s13369-024-09285-y","url":null,"abstract":"To achieve high performance of the electro-hydraulic servo system (EHSS), how to well handle system uncertainties is quietly meaningful in designing various controllers. As a result, the state-space representation of the EHSS is established by considering system uncertainties including the external load force, the friction force, the parameter uncertainties, the structural vibrations, and the unmodeled characteristics. Based on the state model, an extended sliding mode observer (ESMO) for the EHSS is detailly designed to estimate and compensate for the matched and the mismatched system uncertainties. Proper saturation functions are employed in the ESMO to deal with the high-frequency interferences caused by the chattering phenomenon. With two estimation values from the ESMO, an output constraint nonlinear control scheme (OCNCS) is designed for the position output constraint control of the EHSS based on the barrier Lyapunov function (BLF). The state-space model and the proposed control algorithm are then developed in MATLAB/Simulink. Subsequently, some simulation studies are conducted to verify the control performance. What’s more, an experimental bench is established and the control algorithms are then downloaded into the target computer through the internet to drive the bench in real-time. The results from simulation and experiment indicate that the proposed control method outperforms the extended sliding mode observer (ESMO)-based robust adaptive backstepping controller (RABC), the OCNCS, and the backstepping controller (BC). The peak tracking error is reduced by 99.11%, 51.93%, and 37.46% in simulation and 93.54%, 78.98%, and 15.89% in experimental compared to the ESMO-based RABC, the OCNCS, and the BC, respectively.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"140 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the Heterogeneity in Tensile Strength in the Coir (Cocos nucifera)-Epoxy Composite Through Enhancing Surface Quality and Maintaining Longitudinal Integrity 通过提高表面质量和保持纵向完整性减少椰糠-环氧树脂复合材料拉伸强度的不均匀性

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-26 DOI: 10.1007/s13369-024-09331-9

Shashank Mishra, Vishal Parashar

{"title":"Reducing the Heterogeneity in Tensile Strength in the Coir (Cocos nucifera)-Epoxy Composite Through Enhancing Surface Quality and Maintaining Longitudinal Integrity","authors":"Shashank Mishra, Vishal Parashar","doi":"10.1007/s13369-024-09331-9","DOIUrl":"https://doi.org/10.1007/s13369-024-09331-9","url":null,"abstract":"Coir fibers (Cocos nucifera) are strong and sustainable alternative to hazardous synthetic fiber; however, there are certain challenges that has to be dealt with, in order to fully exploit the strength of these fiber. These challenges include hydrophilic and hygroscopic behavior of coir fiber, poor fiber–matrix interface, and the twirling of fibers. In this work, these challenges are resolved in different stages through various surface modification techniques, like alkali treatment for reduced hydrophilicity, silane coating for enhanced interface, and straightening to reduce fiber twirling. FTIR spectroscopy reveals the removal of hemicellulose, lignin, wax, etc. post-alkali treatment, and the following silane treatment show development of new Si–O–Si bonds. Their influence on tensile strength of composite is monitored after every step. Hand-layup methodology is employed for composite fabrication of 25% (w/w) fibers with matrix epoxy LY556/HY951. Developed composite includes untreated coir epoxy (UCE), alkali-treated coir epoxy, alkali-silane coir epoxy, and alkali-silane-straightened coir epoxy (ASSCE). Tensile behavior and thermogravimetric analysis (TGA) were examined. The results show 41% rise in the tensile strength from 29 MPa for UCE specimens to 41 MPa for ASSCE. In addition, there was 70% reduction in the standard deviation for ASSCE specimens. Analysis of variance shows that these modifications produce significant results. TGA test reveals that coir epoxy composites degrade on and above 250 ℃, the untreated coir epoxy shows slightly more thermal stability than alkali-silane composite, followed by alkali treated. The morphology of failed specimens examined under an optical microscope and scanning electron microscope reveals details like fiber cross section, microfibrils, and fiber rupture.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"62 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical Tests and Theoretical Research on Fracture Grouting Reinforcement of Soft and Weak Coal Rock 软弱煤岩裂隙注浆加固的力学试验与理论研究

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-25 DOI: 10.1007/s13369-024-09366-y

Fuyu Wang, Jiafan Zhang, Yiheng Gong, Xiangrui Qin, Chao Yuan, Huimei Zhang

{"title":"Mechanical Tests and Theoretical Research on Fracture Grouting Reinforcement of Soft and Weak Coal Rock","authors":"Fuyu Wang, Jiafan Zhang, Yiheng Gong, Xiangrui Qin, Chao Yuan, Huimei Zhang","doi":"10.1007/s13369-024-09366-y","DOIUrl":"https://doi.org/10.1007/s13369-024-09366-y","url":null,"abstract":"Fracture grouting is an effective method to address the issues of unstable and disturbed collapsing of the roadway surrounding the rock during coal mining. It helps to expel water and air from the weak rock mass, aiming to prevent seepage and reinforce the surrounding rock. Coal samples were grouted with cement-based slurries and epoxy resins of varying water-cement ratios. We conducted uniaxial compression tests on the samples using acoustic emission and VIC3D monitoring systems to examine the durability, compressive strength, and visible damage features of coal samples reinforced with different grouting materials. This study presents the theoretical formula for the elastic modulus of a solid under loading and compares it with experimental results. The test results show that as the water-cement ratio decreases, the compressive strength of grouting and solid materials increases. Additionally, the strength of epoxy resin on the consolidated body shows a significant increase, but the strengthening effect remains consistent with a water-cement ratio of 0.6. An examination of the reinforced body’s failure characteristics revealed that stress concentration first occurred at the coal sample joints. As the loading time progressed, fractures developed, grew, penetrated, and finally failed, with all failure locations occurring in the non-reinforced zone. The theoretical values of elastic modulus are largely comparable with the experimental values, and the contrast between the solid elastic modulus and the unreinforced coal rock is improved, which shows that the integrity of coal rock can be improved by fracture grouting.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"61 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Investigation and Optimization of Process Parameters of Self-Shielded Wire Powder Arc Additive Manufacturing on Low-Carbon Steel Through RSM 通过 RSM 对低碳钢自屏蔽钢丝粉末电弧增材制造工艺参数的实验研究与优化

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-25 DOI: 10.1007/s13369-024-09332-8

Tejendra Singh Singhal, Jinesh Kumar Jain, Manoj Kumar

{"title":"Experimental Investigation and Optimization of Process Parameters of Self-Shielded Wire Powder Arc Additive Manufacturing on Low-Carbon Steel Through RSM","authors":"Tejendra Singh Singhal, Jinesh Kumar Jain, Manoj Kumar","doi":"10.1007/s13369-024-09332-8","DOIUrl":"https://doi.org/10.1007/s13369-024-09332-8","url":null,"abstract":"The choice of parameters is crucial in achieving the desired shape of the bead and reducing flaws in wire arc additive manufacturing. This study seeks to examine the influence of five input process parameters, specifically voltage, current, welding speed, nozzle-to-plate distance, and powder feed rate, at five different levels on the appearance of the bead in samples created using the self-shielded wire powder arc additive manufacturing process with low-carbon steel. Response surface methodology is used to analyze bead geometry, and a comparison analysis is performed to compare the effects of process parameters in conventional and advanced approaches. The appropriateness of the experimental design is evaluated by conducting an analysis of variance on a central composite design matrix that includes five process parameters. The observations indicate that the maximum width of the weld bead is 7.10 mm and the highest height is 4.49 mm. On the other hand, the minimum penetration depth is 1.09 mm, and the minimum dilution is 21%. The ideal input parameters are anticipated to be 21V voltage, 160A current, 5.5 mm/s welding speed, 15mm nozzle-to-plate distance, and 56 gms/min powder feed rate. The most influential component in determining various responses is current, followed by powder feed rate and welding speed. Scanning electron microscopy reveals that the weld bead region consists of both pearlite and Widmanstätten ferrite. Furthermore, the ultimate tensile strength and microhardness of samples produced utilizing self-shielding wire powder arc additive manufacturing are also assessed.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"70 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Ant-Inspired 2-DOF Compliant Mechanism with High Frequency and Large Workspace for Potential Application in Material Testing 具有高频率和大工作空间的新型蚂蚁启发式 2-DOF 顺应机制，有望应用于材料测试

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-25 DOI: 10.1007/s13369-024-09338-2

Hung Dinh Nguyen, Hung Van Le, Ngoc Thoai Tran, Minh Phung Dang, Hong Van Tran, Hieu Giang Le, Thanh-Phong Dao

{"title":"A New Ant-Inspired 2-DOF Compliant Mechanism with High Frequency and Large Workspace for Potential Application in Material Testing","authors":"Hung Dinh Nguyen, Hung Van Le, Ngoc Thoai Tran, Minh Phung Dang, Hong Van Tran, Hieu Giang Le, Thanh-Phong Dao","doi":"10.1007/s13369-024-09338-2","DOIUrl":"https://doi.org/10.1007/s13369-024-09338-2","url":null,"abstract":"This study presents an optimal design approach for a novel compliant mechanism with two degrees of freedom (2-DOF). Inspired from the structure and motion behavior of ant, a new ant-inspired 2-DOF mechanism is developed. The designed mechanism permits a large workspace and a high frequency. The movement of the mobile platform is acted from a piezoelectric actuator through a combination of flexible hinge driving system and three-stage amplification mechanism. The hybrid amplifier consists of multi-lever amplification mechanism. The overall dimensions of the platform are 200 mm × 200 mm × 15 mm. This design offers a high lateral stiffness and a large resonant frequency. Static and dynamic models are formulated using a combination of pseudo-rigid-body model and Lagrange method. The optimum geometry of the mechanism is achieved through the water cycle algorithm. Finally, the physical experiments are evaluated for the prototype. The results found that the mechanism has a simulated resonant frequency of 797.62 Hz; while, the experimental resonant frequency is about 722.5 Hz. The workspace of the proposed mechanism was approximately 341 μm × 341 μm. The developed amplification mechanism could gain a high ratio of 10.278. The experimental results are in a good agreement with the simulated results with an approximately error of 9.4%. The 2-DOF mechanism is aimed to be used for a testing device of material’s properties as well as high precision positioning applications.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"72 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study on the Stability of Mixed-Flow Pump During Segmented Start-Up Process 混流泵在分段启动过程中的稳定性实验研究

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-25 DOI: 10.1007/s13369-024-09350-6

Yifan Xuan, Guojun Zhu, Xingqi Luo, Yang Wang, Like Wang

{"title":"Experimental Study on the Stability of Mixed-Flow Pump During Segmented Start-Up Process","authors":"Yifan Xuan, Guojun Zhu, Xingqi Luo, Yang Wang, Like Wang","doi":"10.1007/s13369-024-09350-6","DOIUrl":"https://doi.org/10.1007/s13369-024-09350-6","url":null,"abstract":"To improve the safety and stability of pumps in the start-up process, a novel start-up strategy named segmented start-up mode is proposed. This paper carries out an experimental study on the stability of mixed-flow pumps in the segmented start-up process. Shaft vibration and pressure pulsation in the pump are important indicators to characterize the stability of mixed-flow pump. And they are collected during segmented and linear start-up modes. Then, based on the complementary ensemble empirical mode decomposition (CEEMD) algorithm and wavelet transform, time–frequency and correlation analyses of the two types of signals are performed. The results indicate the rubbing between the rotor and bearing leading to high-order harmonic components of the shaft vibration spectrum within the frequency range of 2.5fn–5fn, which may cause mechanical resonance. For the segmented start-up mode of fast followed by slow, the amplitude of the pressure pulsation at the impeller outlet is smaller than the other two start-up modes. Furthermore, the high-order harmonics of the blade passing frequency in the spectrum are induced due to the phase resonance phenomenon. In the early stage of segmented start-up, the strong interaction between the shafting and water results in the alternating leading of the shaft vibration and the pressure pulsation at the impeller outlet. But then the impeller outlet pressure pulsation occupies the leader position due to the full development of turbulence flow in the impeller. The segmented start-up mode of fast followed by slow can reduce the probability of mixed-flow pump instability during start-up.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"31 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deformation of an Open Sandwich Cylindrical Shell with CNT Reinforced Faces Using HDQ Method 使用 HDQ 方法研究带有 CNT 加固面的开放式夹层圆柱壳的变形

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-24 DOI: 10.1007/s13369-024-09339-1

Hassan Shokrollahi, Mohammad Emdadi Derabi

{"title":"Deformation of an Open Sandwich Cylindrical Shell with CNT Reinforced Faces Using HDQ Method","authors":"Hassan Shokrollahi, Mohammad Emdadi Derabi","doi":"10.1007/s13369-024-09339-1","DOIUrl":"https://doi.org/10.1007/s13369-024-09339-1","url":null,"abstract":"In this work, the response of a sandwich cylindrical shell with carbon nanotubes (CNTs)-stiffened faces is investigated under a general distributed static loading. The shell boundaries can exhibit any combination of feasible boundary conditions. Specifically, the faces are made of an isotropic material reinforced with CNTs, while the core is composed of an isotropic material. The faces are modeled as thin cylindrical shells following the Kirchhoff–Love assumptions. Additionally, the in-plane stresses in the core material are assumed to be negligible. The governing equations are derived using the principle of the stationary potential energy. The harmonic differential quadrature method is employed to solve the equations for the deformed components. Subsequently, the obtained results are compared with those from finite element analysis. The maximum discrepancies between the two methods amount to approximately 2%. Next, the effects of various parameters including CNTs incorporation and volume percentage, core flexibility, and the core-to-face thickness ratio on the stress and displacement of sandwich cylindrical shells are explored. Considering all types of boundary conditions and examining the impact of relevant parameters, this study asserts that it represents a comprehensive contribution to the field. The main findings have practical implications for engineers and designers working with cylindrical sandwich shells. Incorporating CNTs into the face sheets, with a V-shaped distribution along the thickness, can significantly alter stress and displacement characteristics. Increasing core thickness, the thickness-to-curvature ratio, the CNT volume percentage, and the Young modulus ratio of face sheets to core reduces transverse displacement at the core mid-surface.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"85 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-Time Prediction of Disc Cutter Wear in Low-Abrasive Rocks: Integrating Physico-Mechanical Properties and Signal Processing Features Through Machine Learning Methods 实时预测低磨蚀性岩石中的圆盘刀具磨损：通过机器学习方法整合物理机械特性和信号处理特征

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-23 DOI: 10.1007/s13369-024-09321-x

Mohammad Amir Akhlaghi, Raheb Bagherpour, Seyed Hadi Hoseinie

{"title":"Real-Time Prediction of Disc Cutter Wear in Low-Abrasive Rocks: Integrating Physico-Mechanical Properties and Signal Processing Features Through Machine Learning Methods","authors":"Mohammad Amir Akhlaghi, Raheb Bagherpour, Seyed Hadi Hoseinie","doi":"10.1007/s13369-024-09321-x","DOIUrl":"https://doi.org/10.1007/s13369-024-09321-x","url":null,"abstract":"Tunnel boring machine (TBM) is a popular choice for mechanical excavation due to its efficient, safe, and cost-effective tunnelling capabilities compared to traditional methods. One of the factors that can impact TBM performance is the wear of disc cutters. The wear of the cutting discs can lead to a reduction in their cutting ability, resulting in slower excavation rates, increased power consumption, and increased wear on other TBM components. In this research, sound and vibration signals, along with physical and mechanical characteristics, were used as a real-time method to determine disc wear during the cutting of low-abrasive rocks. For this purpose, the features extracted from the sound and vibration signals recorded during the cutting process were compared with the amount of disc wear. It was observed that with the progress of disc wear, the sound signal decreases, and the vibration increases. Finally, three machine learning methods, including decision tree (DT), random forest (RF), and extreme gradient boosting (XGBoost), were employed to analyse disc wear. The fivefold cross-validation approach was utilized to assess the predictive accuracy of the models. The XGBoost model achieved an R2 value of 0.9424, making it the most accurate model for predicting the wear of the disc cutter. The DT and RF models attained an accuracy of R2 = 0.8379 and R2 = 0.8941, respectively. The method presented in this study can estimate the wear of the disc in real-time and suggest the right time to replace the disc.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"70 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exergetic and Thermal Performance Analysis of Liquid and Gaseous Fuel–Air Mixture in PDC Using Computational Fluid Dynamics 利用计算流体动力学分析 PDC 中液体和气体燃料-空气混合物的能效和热性能

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-07-23 DOI: 10.1007/s13369-024-09319-5

Pinku Debnath, K. M. Pandey

{"title":"Exergetic and Thermal Performance Analysis of Liquid and Gaseous Fuel–Air Mixture in PDC Using Computational Fluid Dynamics","authors":"Pinku Debnath, K. M. Pandey","doi":"10.1007/s13369-024-09319-5","DOIUrl":"https://doi.org/10.1007/s13369-024-09319-5","url":null,"abstract":"Exergy is non-conserved quantities and associated with second law efficiency of a thermodynamic system. The exergy losses during combustion process play a vital role for pilot fuel economy. This study investigates the exergetic and thermal performance of liquid and gaseous fueled pulse detonation combustor at stoichiometric (ϕ = 1) fuel–air mixture. The mathematically formulated model and numerical simulations have been done through Ansys CFD Fluent platform to ascertain the impact of hydrogen and kerosene fuel–air mixture for exergetic performance of pulse detonation combustor. From the simulation, it is found that hydrogen–air and kerosene–air mixture has an exergetic efficiency of 53.19% and 23.43% in deflagration combustion process and 57.49% and 24.89% in detonation combustion process. The surface radiative efficiency of 23.32% is obtained from hydrogen–air detonation combustion, and it is higher than kerosene–air mixture. Exergetic efficiency of gaseous fuel–air mixture has higher compared to liquid fuel–air mixture for both deflagration and detonation combustion process. For the same fuel, utilization higher the combustion species temperature is attained from hydrogen–air mixture with zero emission.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"2677 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0