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Artículos de revistas sobre el tema "Whole engine modelling"

Autor: Grafiati

Publicado: 10 de marzo de 2023

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1

Chen, G. "Vibration modelling and verifications for whole aero-engine." Journal of Sound and Vibration 349 (August 2015): 163–76. http://dx.doi.org/10.1016/j.jsv.2015.03.029.

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2

Lolis, P., P. Giannakakis, V. Sethi, A. J. B. Jackson, and P. Pilidis. "Evaluation of aero gas turbine preliminary weight estimation methods." Aeronautical Journal 118, no. 1204 (2014): 625–41. http://dx.doi.org/10.1017/s0001924000009404.

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AbstractThe estimation of gas turbine engine weight during the preliminary or conceptual design phase is a key part of a Techno-economic Environmental Risk Analysis (TERA). Several methods that are available in the public domain are analysed and compared, in order to establish the physics driving them and their suitability for the weight estimation of modern gas turbine engines. Among the tested methods, only WATE managed to achieve acceptable accuracy for engine optimisation studies. This work demonstrates that the age and restrictions of existing ‘whole engine based’ methods, along with thei

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3

Giuntini, Sabrina, Antonio Andreini, Bruno Facchini, Marco Mantero, Marco Pirotta, and Sven Olmes. "Transient 2D FEM-fluid network coupling for thermo-mechanical whole gas turbine engine simulations: modelling features and applications." E3S Web of Conferences 197 (2020): 10012. http://dx.doi.org/10.1051/e3sconf/202019710012.

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In order to control the thermo-mechanical stresses that large heavy-duty power generation turbines have to face nowadays in their frequent operational transients, the analysis of the heat transfer between main flow, secondary air systems and structural components has to consider multi-physics coupled interactions, and has to be carried out with a whole engine modelling approach, simulating the entire machine in the real operating conditions. This is fundamental to guarantee a reliable assessment of life timing consumption and optimize clearances and temperature picks, through an efficient seco

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4

Giuntini, Sabrina, Antonio Andreini, Giulio Cappuccini, and Bruno Facchini. "Finite element transient modelling for whole engine-secondary air system thermomechanical analysis." Energy Procedia 126 (September 2017): 746–53. http://dx.doi.org/10.1016/j.egypro.2017.08.231.

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5

Giannella, Venanzio, Raffaele Sepe, Roberto Citarella, and Enrico Armentani. "FEM Modelling Approaches of Bolt Connections for the Dynamic Analyses of an Automotive Engine." Applied Sciences 11, no. 10 (2021): 4343. http://dx.doi.org/10.3390/app11104343.

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Three different finite element method (FEM) modelling approaches of bolt connections of a four-stroke, four-cylinder petrol engine are presented, and the related results compared in terms of preprocessing time and accuracy. A full 3D modelling of the bolt connections was preliminarily validated through a comparison with experimental test data available for the whole engine. Two further modelling approaches, a 1D approach and a contact-based (0D) approach, were benchmarked considering their influence on the accuracy for the dynamic analysis of an engine. Each of the three approaches presented p

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6

Altosole, M., and Massimo Figari. "Effective simple methods for numerical modelling of marine engines in ship propulsion control systems design." Journal of Naval Architecture and Marine Engineering 8, no. 2 (2011): 129–47. http://dx.doi.org/10.3329/jname.v8i2.7366.

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In the last year, the Department of Naval Architecture and Marine Engineering of Genoa University (now Department of Naval Architecture, Marine Technology and Electrical Engineering) collaborated to the design of the propulsion automation of two different naval vessels; within these projects the authors developed different ship propulsion simulators used to design and test the propulsion control schemes. In these time-domain simulators, each propulsion component is represented by a specific mathematical model, mainly based on algebraic and differential equations. One of the key aspects of the

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7

Zhang, Sanhua, Kunhao Tang, and Xinhong Zheng. "Modelling and optimal control of energy-saving-oriented automotive engine thermal management system." Thermal Science 25, no. 4 Part B (2021): 2897–904. http://dx.doi.org/10.2298/tsci2104897z.

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The thesis simulates the engine?s installation and uses conditions in the whole vehicle, such as the water tank, fan, the engine?s arrangement in the engine room, accessories and pipe-line connections, etc. to build a test bench for the engine thermal management system. According to the thermal management simulation analysis software KULI modelling, the article designs the bench test conditions according to the parameter input requirements of the thermal management simulation analysis software. The accuracy of the model is verified by comparing simulation and test data, and the NEDC driving cy

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8

Rosli, M. Haziq Adham, M. Razali Hanipah, and Maurice Kettner. "The tuning of a small four-stroke spark ignition engine for flexible valve timings through numerical approach." MATEC Web of Conferences 255 (2019): 04004. http://dx.doi.org/10.1051/matecconf/201925504004.

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Variable valve timing has been implemented by various manufacturers to improve internal combustion engine performance while operating at wide speed and load ranges. A novel flexible valve timing system for a small four-stroke engine is currently under development by Automotive Engineering Research Group (AERG) in Universiti Malaysia Pahang (UMP). In this paper, a comprehensive intake and exhaust tuning for the flexible variable valve timing is presented. A numerical assessment has been conducted through one dimensional engine modelling and simulation using validated model. There are eight valv

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9

Andreassi, L., S. Cordiner, and V. Rocco. "Modelling the early stage of spark ignition engine combustion using the KIVA-3V code incorporating an ignition model." International Journal of Engine Research 4, no. 3 (2003): 179–92. http://dx.doi.org/10.1243/146808703322223379.

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The evolution of early stages of homogeneous mixture combustion in spark ignition (SI) engines represents a critical period that greatly affects the whole combustion process. A proper description of this critical phase represents a major issue, which could strongly influence the overall model predictive capability (i.e. model ability to reproduce the real engine behaviour for a large range of operating conditions without any major tuning). Such requirements become even more important for the simulation of last-generation gasoline direct injection or lean stratified engines, where ignition coul

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10

Siano, D., and R. Citarella. "Elastic Multi Body Simulation of a Multi-Cylinder Engine." Open Mechanical Engineering Journal 8, no. 1 (2014): 157–69. http://dx.doi.org/10.2174/1874155x01408010157.

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This paper analyzes the vibration behavior of an in-line 4-cylinder, 4-strokes, internal combustion turbocharged direct injection gasoline engine. A detailed multi-body numerical model of the engine prototype was used to characterize the whole engine dynamic behavior, in terms of forces and velocities. The crank train multi-body model was created starting from engine geometrical data, and the available combustion loads were employed for the Multi-Body Dynamic Simulation (MBDS). A combined usage of FEM and multi body methodologies were adopted for the dynamic analysis: both crankshaft and cylin

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11

Buyuksalih, I., S. Bayburt, G. Buyuksalih, A. P. Baskaraca, H. Karim, and A. A. Rahman. "3D MODELLING AND VISUALIZATION BASED ON THE UNITY GAME ENGINE – ADVANTAGES AND CHALLENGES." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-4/W4 (November 13, 2017): 161–66. http://dx.doi.org/10.5194/isprs-annals-iv-4-w4-161-2017.

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3D City modelling is increasingly popular and becoming valuable tools in managing big cities. Urban and energy planning, landscape, noise-sewage modelling, underground mapping and navigation are among the applications/fields which really depend on 3D modelling for their effectiveness operations. Several research areas and implementation projects had been carried out to provide the most reliable 3D data format for sharing and functionalities as well as visualization platform and analysis. For instance, BIMTAS company has recently completed a project to estimate potential solar energy on 3D buil

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12

Yang, Liu, Kaili Liu, Yuan Zhong, Shirui Zhou, Beijing Cai, and Xinyu Yang. "Optimization Study of Nacelle mounting position for Blended-Wing-Body Aircraft." Journal of Physics: Conference Series 2228, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1742-6596/2228/1/012007.

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Abstract Blended-wing-body aircraft is a new type of aircraft form that has been used in military aircraft. The potential for application in civil aircraft is being explored. Due to its special shape, the blended-wing-body aircraft is difficult to adopt the conventional under-wing engine mounting form, and usually applies the back braced mounting. The engine mounted on the back could cause surge and separation problems, which affects the flow field quality of the whole aircraft. In this paper, the effect of height and axial mounting position on the overall flow field of the aircraft is determi

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13

Tsentis, S. E., V. G. Gkoutzamanis, A. D. Gaitanis, and A. I. Kalfas. "Multi-platform app-embedded model for hybrid air-breathing rocket-cycle engine in hypersonic atmospheric ascent." Aeronautical Journal 125, no. 1291 (2021): 1631–53. http://dx.doi.org/10.1017/aer.2021.3.

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ABSTRACTThis paper presents a performance analysis on a novel engine concept, currently under development, in order to achieve hybrid air-breathing rocket technology. A component-level approach has been developed to simulate the performance of the engine at Mach 5, and the thermodynamic interaction of the different working fluids has been analysed. The bypass ramjet duct has also been included in the model. This facilitates the improved evaluation of performance parameters. The impact of ram drag induced by the intake of the engine has also been demonstrated. The whole model is introduced into

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14

Liu, Qiaobin, Wenku Shi, and Zhiyong Chen. "Identification of firefly algorithm-based fluctuation coefficient of the exciting torque for vehicle driveline." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 2 (2018): 317–26. http://dx.doi.org/10.1177/1464419318808172.

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The unbalanced excitation force and torque generated by an engine that resonate with the natural frequency of drivetrain often causes vibration and noise problems in vehicles. This study aims to comprehensively employ theoretical modelling and experimental identification methods to obtain the fluctuation coefficients of engine excitation torque when a car is in different gear positions. The inherent characteristics of the system are studied on the basis of the four-degree-of-freedom driveline lumped mass model and the longitudinal dynamics model of vehicle. The correctness of the model is veri

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15

Zhiyong, Gao, Li Jiwu, and Wang Rongxi. "Prognostics uncertainty reduction by right-time prediction of remaining useful life based on hidden Markov model and proportional hazard model." Eksploatacja i Niezawodnosc - Maintenance and Reliability 23, no. 1 (2021): 154–65. http://dx.doi.org/10.17531/ein.2021.1.16.

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Uncertainty is a key problem in remaining useful life (RUL) prediction, and measures to reduce uncertainty are necessary to make RUL prediction truly practical. In this paper, a right-time prediction method is proposed to reduce the prognostics uncertainty of mechanical systems under unobservable degradation. Correspondingly, the whole RUL prediction process is divided into three parts, including offline modelling, online state estimating and online life predicting. In the offline modelling part, hidden Markov model (HMM) and proportional hazard model (PHM) are built to map the whole degradati

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16

Al-Hamdan, Qusai Z., and Munzer S. Y. Ebaid. "Modeling and Simulation of a Gas Turbine Engine for Power Generation." Journal of Engineering for Gas Turbines and Power 128, no. 2 (2005): 302–11. http://dx.doi.org/10.1115/1.2061287.

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The gas turbine engine is a complex assembly of a variety of components that are designed on the basis of aerothermodynamic laws. The design and operation theories of these individual components are complicated. The complexity of aerothermodynamic analysis makes it impossible to mathematically solve the optimization equations involved in various gas turbine cycles. When gas turbine engines were designed during the last century, the need to evaluate the engines performance at both design point and off design conditions became apparent. Manufacturers and designers of gas turbine engines became a

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17

Pipitone, Emiliano, Salvatore Caltabellotta, Antonino Sferlazza, and Maurizio Cirrincione. "Hybrid Propulsion Efficiency Increment through Exhaust Energy Recovery—Part 1: Radial Turbine Modelling and Design." Energies 16, no. 3 (2023): 1030. http://dx.doi.org/10.3390/en16031030.

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The efficiency of Hybrid Electric Vehicles (HEVs) may be substantially increased if the energy of the exhaust gases, which do not complete the expansion inside the cylinder of the internal combustion engine, is efficiently recovered by means of a properly designed turbogenerator and employed for vehicle propulsion; previous studies, carried out by the same authors of this work, showed a potential hybrid vehicle fuel efficiency increment up to 15% by employing a 20 kW turbine on a 100 HP rated power thermal unit. The innovative thermal unit here proposed is composed of a supercharged engine end

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18

Bazaras, Jonas. "INTERNAL NOISE MODELLING PROBLEMS OF TRANSPORT POWER EQUIPMENT." TRANSPORT 21, no. 1 (2006): 19–24. http://dx.doi.org/10.3846/16484142.2006.9638035.

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The acoustic analysis of transport vehicles is presented in this article. Two types of vehicles of Russian production (TEP‐60 and M62) were selected for this research. Using ANSYS/Multiphysic software acoustic noise of different power units in the engine sector was simulated. In this paper we present the modelling results of the locomotive internal noise. In ANSYS/Multiphysic anbience the problems of acoustics are solved on the basis of harmonic response analysis by providing harmonic pressure excitation (sine type) at some points of fluid structure and obtaining the pressure distribution in t

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19

Djilali, Kaid-Ameur, and Mohamed Serrier. "Experimental Method of Tribological Modelling of Different Coatings of Stainless Steel." Mechanics and Mechanical Engineering 22, no. 4 (2020): 1273–86. http://dx.doi.org/10.2478/mme-2018-0098.

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AbstractFretting wear is a unique form of material degradation caused by small amplitude oscillatory relative motion of two surfaces in contact. Fretting wear is typically encountered at relative displacements of less than 300 μm and occurs in either a gross slip regime [1] (where there is slip displacement across the whole contact), or a partial slip regime (where there are parts of the contact where no slip displacement occurs). Fretting wear is experienced within a wide range of industrial sectors, [2] including aero engine couplings, locomotive axles and nuclear fuel casings [3]. Under hig

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20

Hong, C. W., and C. C. Chen. "Dynamic performance simulation of a continuously variable transmission motorcycle for fuzzy autopilot design." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 211, no. 6 (1997): 477–90. http://dx.doi.org/10.1243/0954407971526597.

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This paper describes the modelling technique of a continuously variable transmission (CVT) motorcycle for control strategy design of an autopilot on a driving cycle test bench. The simulation is carried out on a code which is the combination of an engine cycle simulation synthesis, a dynamic CVT driveline algorithm, a chassis dynamometer model and a fuzzy autopilot controller. The autopilot, which is a robot driver, includes a throttle actuator and a brake handle controller. Fundamental fuzzy theories were employed to simulate the control strategy of an experienced driver, also to form a feedb

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21

Wojtowicz, Konrad, Wiesław Sobieraj, and Bartosz Brzozowski. "Simulation Method of UAV Avionics System Designing." Solid State Phenomena 198 (March 2013): 238–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.238.

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Avionics system software development is a sophisticated process depended on not fully specified factors. Therefore, essential steps in the development process are tests and verification. In this aim the virtual environment was constructed and prepared for the tests with the target software and the hardware to eliminate hardware defects and software bugs before first flight. The concept of virtual environment was established and developed after unsuccessful flights with long term prepared aircraft models. There was assumed that modelling methods applied separately to frame, engine and control s

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22

Buyuksalih, G., S. Bayburt, A. P. Baskaraca, H. Karim, and A. Abdul Rahman. "CALCULATING SOLAR ENERGY POTENTIAL OF BUILDINGS AND VISUALIZATION WITHIN UNITY 3D GAME ENGINE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W5 (October 5, 2017): 39–44. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w5-39-2017.

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Solar energy modelling is increasingly popular, important, and economic significant in solving energy crisis for big cities. It is a clean and renewable resource of energy that can be utilized to accommodate individual or group of buildings electrical power as well as for indoor heating. Implementing photovoltaic system (PV) in urban areas is one of the best options to solve power crisis over expansion of urban and the growth of population. However, as the spaces for solar panel installation in cities are getting limited nowadays, the available strategic options are only at the rooftop and faç

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23

Bolu, Gabriel, Gareth Pierce, Anthony Gachagan, Tim Barden, and Gerald Harvey. "Investigations into the Vibrational Response of an Aero-Engine Turbine Blade under Thermosonic Excitation." Key Engineering Materials 518 (July 2012): 184–92. http://dx.doi.org/10.4028/www.scientific.net/kem.518.184.

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Thermosonics is a rapid and potentially cost-saving non-destructive testing (NDT) screening technique that can be applied to the identification of cracks in high pressure compressor turbine blades in turbofan engines. The reliability of the thermosonic technique is not well established for inspecting these complex components; in particular the vibrational energy generated within a component during a thermosonic test is often highly non-uniform, leading to the possibility of missing critical defects. The aim of this study was to develop a methodology, using a combination of vibration measuremen

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24

Pachidis, Vassilios, Pericles Pilidis, Ioannis Templalexis, Theodosios Korakianitis, and Petros Kotsiopoulos. "Prediction of Engine Performance Under Compressor Inlet Flow Distortion Using Streamline Curvature." Journal of Engineering for Gas Turbines and Power 129, no. 1 (2006): 97–103. http://dx.doi.org/10.1115/1.2363414.

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Traditionally, engine performance has been simulated based on nondimensional maps for compressors and turbines. Component characteristic maps assume by default a given state of inlet conditions that cannot be easily altered in order to simulate two- or three-dimensional flow phenomena. Inlet flow distortion, for example, is usually simulated by applying empirical correction factors and modifiers to default component characteristics. Alternatively, the parallel compressor theory may be applied. The accuracy of the above methods has been rather questionable over the years since they are unable t

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25

Qian, Fu, and Zhang Shensheng. "Product Development Process Management System Based on P_PROCE Model." Concurrent Engineering 10, no. 3 (2002): 203–11. http://dx.doi.org/10.1177/106329302761689124.

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Product data management (PDM) systems are enabling tool of concurrent engineering (CE). Although the PDM system provides good support for product data, particularly at the early stages of design, it is seldom used beyond the design process. Furthermore, it provides few facilities for activity definition and no facilities for the enactment of production activities. In order to manage the whole lifecycle of motorcycle development, this paper presents a product development process management system that integrates the workflow management system (WFMS) with the PDM. On one hand we can use the powe

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26

Costa, Michela, Gaia Martoriello, and Raffaele Tuccillo. "Modelling of an innovative and autonomous micro-grid based on a biomass - solar PV hybrid power system." E3S Web of Conferences 238 (2021): 02003. http://dx.doi.org/10.1051/e3sconf/202123802003.

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Micro-Combined heat and power (m-CHP) systems fuelled by renewables, such as residual biomasses, are today of great interest to produce energy in an efficient and green way. The aim of the present work is to develop a numerical model of a hybrid energy system including a biomass powered m-CHP unit based on gasification and coupled with solar photovoltaic (PV) modules and to an electrical storage device, able to provide energy to remote areas. Main advantages of the considered configuration are its ultra-low environmental impact and just its autonomous operation by local resources. The develope

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27

Fois, N., M. Watson, and MB Marshall. "The influence of material properties on the wear of abradable materials." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 2 (2016): 240–53. http://dx.doi.org/10.1177/1350650116649528.

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In aero-engines it is possible for the blades of the compressor, turbine or fan to incur into their casings. At these interfaces a lining of composite abradable material is used to limit damage to components and thereby sustain the efficiency and longevity of the engine as a whole. These composite materials must have good abradability and erosion resistance. Previously, the wear mechanisms at the contact between the blade and the coating have been characterised using stroboscopic imaging and force measurement on a scaled test-rig platform. This work is focused on the characterisation of the we

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28

Thompson, G. J., C. M. Atkinson, N. N. Clark, T. W. Long, and E. Hanzevack. "Technical Note: Neural network modelling of the emissions and performance of a heavy-duty diesel engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 214, no. 2 (2000): 111–26. http://dx.doi.org/10.1177/095440700021400201.

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Internal combustion engines are being required to comply with increasingly stringent government exhaust emissions regulations. Compression ignition (CI) piston engines will continue to be used in cost-sensitive fuel applications such as in heavy-duty buses and trucks, power generation, locomotives and off-highway applications, and will find application in hybrid electric vehicles. Close control of combustion in these engines will be essential to achieve ever-increasing efficiency improvements while meeting increasingly stringent emissions standards. The engines of the future will require signi

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29

Pylypenko, O. V., O. O. Prokopchuk, S. I. Dolgopolov, et al. "Mathematical modelling of start-up transients at clustered propulsion system with POGO-suppressors for CYCLON-4M launch vehicle." Kosmìčna nauka ì tehnologìâ 27, no. 6 (2021): 3–15. http://dx.doi.org/10.15407/knit2021.06.003.

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Liquid-propellant rocket propulsion systems of the first stages of launch vehicles of medium, heavy, and super-heavy class usually include POGO-suppressors, which are one of the most widely used methods to eliminate launch vehicle longitudinal structural vibrations (POGO phenomena). However, until now, the theoretical studies and analysis of the effect of the POGO-suppressors’ installation in the feedlines of main liquid rocket engines on transient processes in systems during rocket engine starting have not been carried out due to the complexity of such analysis and the lack, first of all, rel

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30

Kulmanakov, Sergey P., Sergejus Lebedevas, Sergey S. Kulmanakov, Nadežda Lazareva, and Paulius Rapalis. "COMPARATIVE STUDIES OF THE BIODIESEL FUEL JET DEVELOPMENT DYNAMICS IN COMMON RAIL AND CONVENTIONAL DESIGN FUEL SYSTEMS." Transport 34, no. 1 (2019): 67–74. http://dx.doi.org/10.3846/transport.2019.7223.

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The results of comparative diesel and biodiesel (Rapeseed oil Methyl Ester (RME) and Rapeseed Oil (RO)) fuel jet structure studies by optical scanning method are presented. There is an interrelation between the dynamics of fuel jet development by the Common Rail (CR) with single-phase injection and Conventional Design System (CDS) and the parameters of mixture formation, which are typical for transferring the operation of the Diesel Engine (DE) from mineral diesel to RME and RO. The structure of the Diesel Fuel (DF) jet is significantly more heterogeneous by the size and number of droplets in

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Hasanovich, Linda, and David Nobes. "Investigation of effect of heat exchanger size on power output in low-temperature difference Stirling engines." E3S Web of Conferences 313 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202131303002.

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The Stirling engine is capable of converting any source of thermal energy into kinetic energy, which makes it an attractive option for utilizing low-temperature sources such as geothermal or waste heat below 100 °C. However, at these low temperatures, the effects of losses are proportionally higher due to the lower thermal potential available. One such significant loss is excess dead volume, wherein a significant contributor is the heat exchangers. The heat exchangers must be selected to optimize power output by minimizing the dead volume loss while maximizing the heat transfer to and from the

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Mabrouk, M. B., A. Jonoski, D. Solomatine, and S. Uhlenbrook. "A review of seawater intrusion in the Nile Delta groundwater system – the basis for assessing impacts due to climate changes and water resources development." Hydrology and Earth System Sciences Discussions 10, no. 8 (2013): 10873–911. http://dx.doi.org/10.5194/hessd-10-10873-2013.

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Abstract. Serious environmental problems are emerging in the River Nile basin and its groundwater resources. Recent years have brought scientific evidence of climate change and development-induced environmental impacts globally as well as over Egypt. Some impacts are subtle, like decline of the Nile River water levels, others are dramatic like the salinization of all coastal land in the Nile Delta – the agricultural engine of Egypt. These consequences have become a striking reality causing a set of interconnected groundwater management problems. Massive population increase that overwhelmed the

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33

Alkan, Selcuk, and Tuba Ada. "Digital game design on the subject of identities and expansions." New Trends and Issues Proceedings on Humanities and Social Sciences 4, no. 9 (2018): 17–21. http://dx.doi.org/10.18844/prosoc.v4i9.3038.

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This study aimed to design a digital game used in the teaching of identities and expansions and provide modelling by students. This game was designed according to the eighth-grade math curriculum. Unity3d game engine was used in designing the game. The software required to run the game was written by researchers using C# and java script. At the stage of designing, initially, the game was introduced to five mathematics teachers and various arrangements were made according to their opinions. Then, the game was evaluated and given the final form by two instructors who were experts in the field of

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Crossland, R., J. Sims Williams, and C. McMahon. "The practical application of design risk assessment models." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 217, no. 2 (2003): 227–34. http://dx.doi.org/10.1243/095440503321148867.

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This paper describes three case studies of the application of quantitative design risk assessment methods in practice. The studies arose out of a survey of risk practice in design which showed that leading edge companies use quantitative methods of risk assessment in assessing both project risk, which may be defined as the risk to cost and time-scale, and technical risk, which may be defined as the risk that the designed artefact will not meet its functional requirements. The first case study concerns a coastal defence programme and is primarily concerned with technical risk. The second study

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Wittig, S., S. Kim, Th Scherer, and I. Weissert. "Numerical Study for Optimizing Heat Transfer in High Speed Rotating Components." International Journal of Rotating Machinery 4, no. 3 (1998): 151–61. http://dx.doi.org/10.1155/s1023621x9800013x.

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Cooling of high speed rotating components is a typical situation found in turbomachinery as well as in automobile engines. Accurate knowledge of discharge coefficients and heat transfer of related components is essential for the high performance of the whole engine. This can be achieved by minimized cooling air flows and avoidance of hot spots. In high speed rotating clutches for example aerodynamic investigations improving heat transfer have not been considered in the past. Advanced concepts of modern plate design try to reduce thermal loads by convective cooling methods. Therefore, secondary

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Buhammood, A. H., Henry Abanda, Peter Garstecki, M. B. Manjia, Chrispin Pettang, and Abdulrasheed Madugu Abdullahi. "Coupling BIM and Game Engine Technologies for Construction Knowledge Enhancement." International Journal of Gaming and Computer-Mediated Simulations 12, no. 4 (2020): 38–63. http://dx.doi.org/10.4018/ijgcms.2020100103.

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Interactions and collaboration between parties in construction projects are often characterised by misunderstandings and poor information exchange. Game engine technologies, when employed with building information modelling (BIM), can help address these shortcomings. Quite often, the visualisation capabilities of BIM models are not explored fully partly because of their limited interactive capability. While game engines are powerful in visualisation and interactions in the gaming industry, the literature suggests a lack of understanding of the applicability of the same in construction. This st

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Zalina Mat Nawi, Siti Kartom Kamarudin, and Siti Rozaimah Sheikh Abdullah. "Improve Waste Heat Recovery and Performance of Organic Rankine Cycle Analysis for Exhaust Gas from A Marine Diesel Engine Using Biofuel from Algae." Journal of Advanced Research in Applied Sciences and Engineering Technology 29, no. 3 (2023): 1–20. http://dx.doi.org/10.37934/araset.29.3.120.

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Marine diesel engines are commonly used as a propulsion system in ships. The waste heat generated from marine diesel engines is one of the key disadvantages of this system. This study aims to improve the recovery of waste heat generation. It presents the performance analysis of Organic Rankine Cycle (ORC) for exhaust gas in a marine diesel engine using different types of biofuels production methods from selected microalgae via mathematical modelling. The microalgae are from species of Synechococcus PCC 7002, Nannochloropsis oculata sp, Chlorella protothecoides, and Dunaliella sp. A marine engi

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Hashchuk, P., and S. Nikipchuk. "HARD-SOFT TECHNOLOGY OF INFORMATION SUSPENSION PROCESS OF MODELING OF HEAT GENERATION/HEAT CONSUMPTION IN THE INTERNAL COMBUSTION ENGINE." Bulletin of Lviv State University of Life Safety, no. 18 (December 31, 2018): 6–22. http://dx.doi.org/10.32447/20784643.18.2018.01.

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Deterministic and, in a certain sense, "linear" interpretation of the world often leads to the recognition of the fact that the more accurate model we need, the more complex it must be (as in case of a formalized reproduction of the real system, or the implementation of the desired system properties in the process of formal synthesis of something new). Instead, following the principle of synergy leads to the conviction that there is always a certain model of optimal complexity e.g. in the synthesis of the new system, and in the analysis of real system peculiarities. However, the model of reali

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Molina, Santiago, Ricardo Novella, Josep Gomez-Soriano, and Miguel Olcina-Girona. "New Combustion Modelling Approach for Methane-Hydrogen Fueled Engines Using Machine Learning and Engine Virtualization." Energies 14, no. 20 (2021): 6732. http://dx.doi.org/10.3390/en14206732.

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The achievement of a carbon-free emissions economy is one of the main goals to reduce climate change and its negative effects. Scientists and technological improvements have followed this trend, improving efficiency, and reducing carbon and other compounds that foment climate change. Since the main contributor of these emissions is transportation, detaching this sector from fossil fuels is a necessary step towards an environmentally friendly future. Therefore, an evaluation of alternative fuels will be needed to find a suitable replacement for traditional fossil-based fuels. In this scenario,

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40

Camus, Benjamin, Thomas Paris, Julien Vaubourg, et al. "Co-simulation of cyber-physical systems using a DEVS wrapping strategy in the MECSYCO middleware." SIMULATION 94, no. 12 (2018): 1099–127. http://dx.doi.org/10.1177/0037549717749014.

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Most modeling and simulation (M&S) questions about cyber-physical systems (CPSs) require expert skills belonging to different scientific fields. The challenges are then to integrate each domain’s tools (formalism and simulation software) within the rigorous framework of M&S process. To answer this issue, we give the specifications of the Multi-agent Environment for Complex-SYstem CO-simulation (MECSYCO) middleware which enables to interconnect several pre-existing and heterogeneous M&S tools, so they can simulate a whole CPS together. The middleware performs the co-simulation in a

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41

Altosole, Marco, Ugo Campora, Massimo Figari, Michele Laviola, and Michele Martelli. "A Diesel Engine Modelling Approach for Ship Propulsion Real-Time Simulators." Journal of Marine Science and Engineering 7, no. 5 (2019): 138. http://dx.doi.org/10.3390/jmse7050138.

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A turbocharged diesel engine numerical model, suitable for real-time ship manoeuvre simulation, is presented in this paper. While some engine components (mainly the turbocharger, intercooler and manifolds) are modelled by a filling and emptying approach, the cylinder simulation is based on a set of five-dimensional numerical matrices (each matrix is generated by means of a more traditional thermodynamic model based on in-cylinder actual cycle). The new cylinder calculation approach strongly reduces the engine transient computation time, making it possible to transform the simulation model into

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42

Ali, F., K. Tzanidakis, I. Goulos, V. Pachidis, and R. d’Ippolito. "Multidisciplinary design and optimisation of conceptual rotorcraft powerplants for operational performance and environmental impact." Aeronautical Journal 119, no. 1217 (2015): 891–914. http://dx.doi.org/10.1017/s0001924000010976.

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AbstractThis paper demonstrates the application of an integrated rotorcraft multidisciplinary design and optimisation framework, deployed for the purpose of preliminary design and assessment of optimum regenerative powerplant configurations for rotorcraft applications. The proposed approach comprises a wide-range of individual modelling theories applicable to rotorcraft flight dynamics, gas turbine engine performance and weight estimation as well as a physics-based stirred reactor model, for the rapid estimation of various gas turbine gaseous emissions. A single-objective Particle Swarm Optimi

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Nimsiriwangso, Atip, Paul Barnes, Omid Doustdar, et al. "6-Stroke Engine: Thermodynamic Modelling and Design for Testing." Journal of KONES 26, no. 2 (2019): 93–106. http://dx.doi.org/10.2478/kones-2019-0037.

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Abstract In the study AVL BOOST™ is used to perform a thermodynamic simulation of a six-stroke engine, being built by a research team based in Saudi Arabia. The six-stroke cycle consists of a standard four-stroke Otto Cycle followed by a heat recovering steam expansion cycle. Water is injected into the hot combustion chamber towards the end of the Otto expansion stroke producing steam, which is used to perform work on a piston. This process produces power using waste heat and therefore increases the overall efficiency of the engine. The Robin EY28D engine, which is a single cylinder, four-stro

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Tvrdojevic, Mijo, Milan Vujanovic, Peter Priesching, et al. "Implementation of the Semi Empirical Kinetic Soot Model Within Chemistry Tabulation Framework for Efficient Emissions Predictions in Diesel Engines." Open Physics 17, no. 1 (2019): 905–15. http://dx.doi.org/10.1515/phys-2019-0096.

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Abstract Soot prediction for diesel engines is a very important aspect of internal combustion engine emissions research, especially nowadays with very strict emission norms. Computational Fluid Dynamics (CFD) is often used in this research and optimisation of CFD models in terms of a trade-off between accuracy and computational efficiency is essential. This is especially true in the industrial environment where good predictivity is necessary for engine optimisation, but computational power is limited. To investigate soot emissions for Diesel engines, in this work CFD is coupled with chemistry

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Korsunovs, Aleksandrs, Felician Campean, Gaurav Pant, Oscar Garcia-Afonso, and Efe Tunc. "Evaluation of zero-dimensional stochastic reactor modelling for a Diesel engine application." International Journal of Engine Research 21, no. 4 (2019): 592–609. http://dx.doi.org/10.1177/1468087419845823.

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Prediction of engine-out emissions with high fidelity from in-cylinder combustion simulations is still a significant challenge early in the engine development process. This article contributes to this fast evolving body of knowledge by focusing on the evaluation of NO x emission prediction capability of a probability density function–based stochastic reactor engine models for a Diesel engine. The research implements a systematic approach to the study of the stochastic reactor engine model performance, underpinned by a detailed space-filling design of experiments (DoE)-based sensitivity analysi

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Ra, Y., E. J. Hruby, and R. D. Reitz. "Parametric study of combustion characteristics in a direct-injection diesel homogeneous charge compression ignition engine with a low-pressurefuel injector." International Journal of Engine Research 6, no. 3 (2005): 215–30. http://dx.doi.org/10.1243/146808705x7392.

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Homogeneous charge compression ignition (HCCI) combustion is an alternative to current engine combustion systems and is used as a method to reduce emissions. It has the potential nearly to eliminate engine-out NOx emissions while producing diesel-like engine efficiencies, when a premixture of gas-phase fuel and air is burned spontaneously and entirely by an autoignition process. However, when direct injection is used for diesel fuel mixture preparation in engines, the complex in-cylinder flow field and limited mixing times may result in inhomogeneity of the charge. Thus, in order to minimize n

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Chew, J. W., and N. J. Hills. "Computational fluid dynamics and virtual aeroengine modelling." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 12 (2009): 2821–34. http://dx.doi.org/10.1243/09544062jmes1597.

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Use of large-scale computational fluid dynamics (CFD) models in aeroengine design has grown rapidly in recent years as parallel computing hardware has become available. This has reached the point where research aimed at the development of CFD-based ‘virtual engine test cells’ is underway, with considerable debate of the subject within the industrial and research communities. The present article considers and illustrates the state-of-the art and prospects for advances in this field. Limitations to CFD model accuracy, the need for aero-thermo-mechanical analysis through an engine flight cycle, c

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Kamaludin, Khairul Khusairi, Aman Mohd Ihsan Mamat, Zulkifli Mohamed, and Wan Saiful-Islam Wan Salim. "Water injection control modelling by using model-based calibration." IAES International Journal of Robotics and Automation (IJRA) 11, no. 4 (2022): 304. http://dx.doi.org/10.11591/ijra.v11i4.pp304-314.

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<p><span lang="EN-US">This study presents the development of water injection system for turbocharged spark ignition engine. The water injection control system is built for turbocharged spark ignition (SI) engine where water was injected at the intake port just before the throttle body. The data was collected from the simulation through the GT-Power software to determine the optimized injection output for the engine. Single-stage statistical engine responses and boundary models were established by using Model-Based Calibration Toolbox. Control system was built using Simulink and sim

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Ling, C. H., and M. A. Abas. "One-Dimensional Simulation Using Port Water Injection for a Spark Ignition Engine." International Journal of Automotive and Mechanical Engineering 15, no. 4 (2018): 5803–14. http://dx.doi.org/10.15282/ijame.15.4.2018.7.0444.

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Water injection is a promising solution to reduce fuel consumption while improving the performance of a turbocharged gasoline engine. One-dimensional (1D) engine simulation software, AVL BOOST is rarely used to model water injection. Therefore, this study is aimed to demonstrate the detailed port water injection modelling via AVL BOOST. A four-cylinder turbocharged gasoline engine was developed in AVL BOOST based on the specification of the engine test rig and verified to be used as the baseline model. The port water injection modelling was then added to the baseline model. Water to fuel mass

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50

Righi, Mauro, Vassilios Pachidis, László Könözsy, Fanzhou Zhao, and Mehdi Vahdati. "Three-dimensional low-order surge model for high-speed axial compressors." Journal of the Global Power and Propulsion Society 4 (December 18, 2020): 274–84. http://dx.doi.org/10.33737/jgpps/130790.

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Surge in modern aero-engines can lead to violent disruption of the flow, damage to the blade structures and eventually engine shutdown. Knowledge of unsteady performance and loading during surge is crucial for compressor design, however, the understanding and prediction capability for this phenomenon is still very limited. While useful for the investigation of specific cases, costly experimental tests and high-fidelity CFD simulations cannot be used routinely in the design process of compressor systems. There is therefore an interest in developing a low-order model which can predict compressor

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