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Influence of mesh and combustion parameters on a spark ignition engine CFD simulation 网格和燃烧参数对火花点火发动机CFD仿真的影响
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303374s
T. Senčić, V. Mrzljak, O. Bukovac, Josip Batista
{"title":"Influence of mesh and combustion parameters on a spark ignition engine CFD simulation","authors":"T. Senčić, V. Mrzljak, O. Bukovac, Josip Batista","doi":"10.5937/fme2303374s","DOIUrl":"https://doi.org/10.5937/fme2303374s","url":null,"abstract":"In the current paper, a CFD simulation study on a pent-roof, spark ignition engine was performed. The scope was to analyze the basic parameters that influence the performances of the simulation: mesh configuration, mesh refinement, turbulence model, and flame wrinkling model parameters. It was used as the OpenFOAM solver for spark ignition engines. The solver was modified by adding the layer addition/removal mechanism for the mesh. Further, a Zeldovich extended NOx model was implemented. Four different mesh configurations were tested with different refinement levels. A set of different turbulence models and initial parameters and different flame wrinkling model parameters were tested. It was observed how all these parameters influence the rate of heat release, cylinder pressure, temperature, the level of turbulent kinetic energy, the flame wrinkling factor, and finally the resulting concentration of nitride monoxide.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"76 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85651620","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
Passive flow modification over the supersonic and the hypersonic air-intake system using bleed 在超声速和高超声速进气系统上采用抽气的被动气流改造
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2303329s
J. Sinha, Sanjay Singh, O. Prakash, D. Panchal
{"title":"Passive flow modification over the supersonic and the hypersonic air-intake system using bleed","authors":"J. Sinha, Sanjay Singh, O. Prakash, D. Panchal","doi":"10.5937/fme2303329s","DOIUrl":"https://doi.org/10.5937/fme2303329s","url":null,"abstract":"The air intake should be operated at design conditions to achieve a high total pressure recovery and optimum mass capture ratio. The current research focuses on the numerical simulation of the supersonic and hypersonic air inlet and its starting and unstarting characteristics. 2D RANS equation for supersonic and hypersonic intake has been solved using the k-oSST turbulence model. The in-house code and the algorithm based on the RANS equation have also been validated in due process and used for subsequent simulations. The sudden drop in mass capture ratio indicates the unstart condition of the intake. The presence of a bleed section has a commendable effect on the performance parameter of the air intake. A separation bubble was observed at the intake's entrance during the off-design conditions, resulting in performance losses. Four different bleed sections ranging in size from 1.6mm to 8.6mm were used, and simulations with bleed were run for different Mach numbers ranging from 3 to 8. The optimum bleed size of 3mm has been found quite effective in modifying Total pressure recovery within the optimum mass flow rate over the wide range of Mach numbers.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"82 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91347610","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
Nonlinear dynamic analysis of meteorological variables for Ha'il region, Saudi Arabia, for the period 1990-2022 沙特阿拉伯哈伊勒地区1990-2022年气象变量的非线性动态分析
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302231m
Mohammed Majid, Mohd Nooran, F. Razak
{"title":"Nonlinear dynamic analysis of meteorological variables for Ha'il region, Saudi Arabia, for the period 1990-2022","authors":"Mohammed Majid, Mohd Nooran, F. Razak","doi":"10.5937/fme2302231m","DOIUrl":"https://doi.org/10.5937/fme2302231m","url":null,"abstract":"The study applies diverse methods of chaos detection to meteorological variable data (air temperature, relative humidity, surface pressure, precipitation, and wind speed for Ha'il, Saudi Arabia) to understand the nonlinear dynamics and to classify their nature. Additionally, Random Forest Algorithm model is used to predict the precipitation and wind speed. The results obtained by classical and modern approaches are compared. All the variables are found to be chaotic based on correlation dimension, approximate entropy, and 0-1 test. The chaos decision tree algorithm diagnoses air temperature, relative humidity, and wind speed as chaotic, while precipitation and surface pressure are identified as stochastic. This shows that the classical methods are well-validated with the modern methods. Nevertheless, some of them contradict modern methods. The analysis for 32 years of data showed no precipitation for 92% of the time during the entire period based on the Random Forest algorithm.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"69 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90594188","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
A novel design of smart knee joint prosthesis for above-knee amputees 一种用于膝上截肢者的智能膝关节假体的新设计
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302131k
Shaimaa Kamel, M. Hamzah, Saad Abdulateef, Q. Atiyah
{"title":"A novel design of smart knee joint prosthesis for above-knee amputees","authors":"Shaimaa Kamel, M. Hamzah, Saad Abdulateef, Q. Atiyah","doi":"10.5937/fme2302131k","DOIUrl":"https://doi.org/10.5937/fme2302131k","url":null,"abstract":"Amputees suffer greatly from lower limb amputation. A novel smart knee joint prosthesis was constructed in this research to allow the amputee to achieve regular daily movement, such as walking, standing, and ascending/descending stairs. This prosthesis employs sensors, actuators, and a mechanical system to replicate the functioning of a natural limb. As a result of the unique mechanical and electrical components employed herein to boost performance, metabolic energy is lowered. Here, a ball screw is employed, which has been determined to be the most efficient means of achieving linear motion; its precision and efficiency range from 90% to 100%. It is quieter and more efficient than a hydraulic or pneumatic system. An electromechanical linear actuator (servo cylinder) is used with an actuator control system and integrated Phase Index - Field-Oriented Control. It maintains and self-calibrates the needed position with high precision when power or backup power is unavailable. The angle of flexion achieved in this design is 120º. The gait analysis revealed that the current prosthesis could imitate the biomechanics of the normal joint with no difficulty at varied speeds when tested on an amputee (110 kg). Furthermore, it may function efficiently as a passive when power is unavailable, including the capacity to move smoothly throughout the swing phase (high accuracy through deceleration and acceleration). The current active knee joint is lightweight (2869 grams), and the cost has been greatly reduced.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"4 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90630412","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
Multi-response optimization of PMEDM on Inconel 718 using hybrid T-GRA, TOPSIS, and ANN model 基于T-GRA、TOPSIS和ANN混合模型的Inconel 718上PMEDM多响应优化
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2304564r
Ram Sai, Jeavudeen Shiek, Shaul Syed
{"title":"Multi-response optimization of PMEDM on Inconel 718 using hybrid T-GRA, TOPSIS, and ANN model","authors":"Ram Sai, Jeavudeen Shiek, Shaul Syed","doi":"10.5937/fme2304564r","DOIUrl":"https://doi.org/10.5937/fme2304564r","url":null,"abstract":"Inconel 718 is one of the Nickel-based superalloys considered one of the most difficult-to-machine materials owing to its property to retain hardness at higher temperatures. This study examined the performance of Edcutor-based PMEDM machining on Inconel 718. Taguchi L9 OA has been used with current, Pulse-OFF time & Pulse-ON time as process parameters with a delivery side pressure of 6 bar for the Alumina mixed dielectric. Material removal rate (MRR), Tool wear rate (TWR), & surface roughness (SR) have been taken as output responses. The results have been investigated by MADM techniques, namely Taguchi-based Grey Relational Analysis (T-GRA) & TOPSIS analysis. Furthermore, the ranks obtained from T-GRA & TOPSIS have been validated by developing a single layered ANN model. Ranks predicted by the ANN model are the same for T-GRA and TOPSIS and the R-values are 0.924 & 0.871, respectively. ANOVA has also been used to analyze parameter effects on output responses.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135611751","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
GARM: A stochastic evolution based genetic algorithm with rewarding mechanism for wind farm layout optimization GARM:一种基于随机进化的具有奖励机制的风电场布局优化遗传算法
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2304575m
Mohamed Mohandes, Salman Khan, Shafiqur Rehman, Ali Al-Shaikhi, Bo Liu, Kashif Iqbal
{"title":"GARM: A stochastic evolution based genetic algorithm with rewarding mechanism for wind farm layout optimization","authors":"Mohamed Mohandes, Salman Khan, Shafiqur Rehman, Ali Al-Shaikhi, Bo Liu, Kashif Iqbal","doi":"10.5937/fme2304575m","DOIUrl":"https://doi.org/10.5937/fme2304575m","url":null,"abstract":"Wind energy has emerged as a potential alternative to traditional energy sources for economical and clean power generation. One important aspect of wind energy generation is the layout design of the wind farm so as to harness maximum energy. Due to its inherent computational complexity, the wind farm layout design problem has traditionally been solved using nature-inspired algorithms. An important issue in nature-inspired algorithms is the termination condition, which governs the execution time of the algorithm. To optimize the execution time, appropriate termination conditions should be employed. This study proposes the concept of a rewarding mechanism to achieve optimization in termination conditions while maintaining the solution quality. The proposed rewarding mechanism, adopted from the stochastic evolution algorithm, is incorporated into a genetic algorithm. The proposed genetic algorithm with the rewarding mechanism (GARM) is empirically tested using real data from a potential wind farm site with different rewarding iterations.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612321","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
Design optimization of a multi row disk inlet device with an optimum nose cone angle 具有最佳鼻锥角的多排圆盘进气道的优化设计
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2301023s
J. Sinha, Sanjay Singh, O. Prakash, D. Panchal
{"title":"Design optimization of a multi row disk inlet device with an optimum nose cone angle","authors":"J. Sinha, Sanjay Singh, O. Prakash, D. Panchal","doi":"10.5937/fme2301023s","DOIUrl":"https://doi.org/10.5937/fme2301023s","url":null,"abstract":"The inlet is designed to compress the air and increase static pressure. In the present work, analyses have been carried out using 2D axisymmetric Reynolds averaged Navier Stokes equations (RANS) equations to capture the flow physics of the shock structure produced by the multi-row disk inlet device at different semi-cone angles. The present work involves numerical studies on the shock structure over the disk. Drag coefficient, pressure variation, and vortex behavior with separation layers have been observed with various semi-cone angles of 12°, 15°, and 20° at the steady-state condition and zero angles of attack. At the free stream Mach number 2 and turbulence model k-o SST, simulations have been carried out using commercial software. Compression through the cavity structure and the drag coefficient analysis at 20° shows better trade-off performance than the others. We also obtained that 20° is the maximum semi-cone angle for the current disk set-up and the operating conditions.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"26 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81062749","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
Simulation study of RCS/R-systems with several robots serving one picking station 多机器人分拣站RCS/ r系统的仿真研究
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302201t
Philipp Trost, Georg Karting, Michael Eder
{"title":"Simulation study of RCS/R-systems with several robots serving one picking station","authors":"Philipp Trost, Georg Karting, Michael Eder","doi":"10.5937/fme2302201t","DOIUrl":"https://doi.org/10.5937/fme2302201t","url":null,"abstract":"Robot-based compact storage and retrieval systems (RCS/RS) are fully automatic storage systems operated by robots from above. Therein, goods are stored in plastic bins stacked on each other, resulting in a 'Last-In-First-Out' storage strategy within each stack. This ensures very high degrees of space utilization. If containers located further down the stack are required, the robots relocate those stored above the required one. RCS/R-systems can typically be found in e-commerce, the pharmaceutical industry, and food or spare parts trade. Besides the system parameters, many other factors, such as the number of robots or the grid size, influence the system's behavior. This paper focuses on the system's throughput and the optimum number of operating robots. A discrete event simulation (DES) in the SIMIO simulation program gained insights into design variants and operating modes.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"328 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80418087","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
On ultimate strength of an inland waterway barge 内河驳船的极限强度
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2301090i
Nemanja Ilić, N. Momčilović
{"title":"On ultimate strength of an inland waterway barge","authors":"Nemanja Ilić, N. Momčilović","doi":"10.5937/fme2301090i","DOIUrl":"https://doi.org/10.5937/fme2301090i","url":null,"abstract":"Due to the sudden nature of hull girder collapse caused by extreme loadings, the ultimate strength of ships, i.e., ultimate capacity, has to be evaluated. Ultimate strength analysis procedures have already been provided within the rules of the classification societies for sea-going ships. However, rules for inland vessels are not fully addressing the issue. In addition, literature data on the ultimate strength of inland vessels are almost negligible, which is alarming, considering the frequency of grounding and overloading events in inland navigation. Moreover, inland vessels' structural elements are prone to buckling due to their slender plates. In order to evaluate ultimate strength, an inland waterway (IW) barge is chosen for progressive collapse analysis (PCA) employment. PCA has demonstrated that the buckling collapse of structural elements vastly governs a vessel's ultimate capacity. Results show the extent of the safety zone between the actual loss of the ultimate capacity and the linear-elastic behavior of the structure.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"32 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91300137","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: 1
Design of Fractional-Order PID controller for trajectory tracking control of continuum robots 连续体机器人轨迹跟踪控制的分数阶PID控制器设计
IF 1.6
FME Transactions Pub Date : 2023-01-01 DOI: 10.5937/fme2302243b
Ayman Belkhiri, A. Amouri, A. Cherfia
{"title":"Design of Fractional-Order PID controller for trajectory tracking control of continuum robots","authors":"Ayman Belkhiri, A. Amouri, A. Cherfia","doi":"10.5937/fme2302243b","DOIUrl":"https://doi.org/10.5937/fme2302243b","url":null,"abstract":"Continuum robots are the behavioral extension of hyper-redundant robots usually inspired by living biological organs. These robots outperform their rigid counterparts regarding high flexibility, dexterity, and most importantly safe interaction. On the flip side, they are kinematically redundant, highly nonlinear, and multi-input, and consequently, their controlling remains a complex and challenging task. To this end, this paper proposes a Fractional-Order Proportional-Integral-Derivative (FOPID) controller to control the continuum robot's end-tip. The proposed controller is designed to control the inputs of a class of continuum robots, namely the Cable-Driven Continuum Robot (CDCR). To design the controller satisfactorily, the Particle Swarm Optimization (PSO) algorithm extracts the optimal values of the controller's parameters. The proposed FOPID controller's efficiency and control performance are demonstrated through two simulation examples: set-point tracking and point-to-point trajectory tracking. In addition, the obtained simulation results are compared to those provided by classical and Optimized PID controllers and to some available schemes. Given the obtained results, it is clear that the performances of the proposed FOPID controller are superior in tracking accuracy and smoothness in control signals.","PeriodicalId":12218,"journal":{"name":"FME Transactions","volume":"15 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87849862","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: 1
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