bluuebunny/crossref_metadata_2025_split huggingface dataset:
A CSM-CFD methodology applied to the design of a cryogenic WT model
Authors: Russo S , Kirchner J. , Seiler J. , Graumann G , Adden S , Paletta N 
Published: January 2021

Abstract
The Aero-structural coupled analysis presented in this work represents an important part of the PRODIGE project, whose main purpose is the prediction of aerodynamics and hinge moment loads of the aileron of a scale model of business jet at transonic Mach numbers and flight Reynolds number. More in details, this methodology supports the design activities of the cryogenic wind-tunnel (WT) model to be tested in the European Transonic Wind tunnel (ETW). The need to implement such a kind of analysis comes from the requirement to take into account the “pure aeroelastic effect” during experimental tests and need to understand the effect of the WT model flexibility on the control surface load prediction, prior to and in parallel with the balance design. CFD evaluations are performed on the whole model, while a static Fluid-Structure-Interface (FSI) procedure is set up and, only, applied to the wing and aileron of the model. The FSI cycle is made of two blocks: a CFD evaluation part and a CSM evaluation part. Both modules are coupled within an iterative loop, where information are exchanged between them. Two angles of incidence are taken into account, i.e. the lowest value (α=-3°) and the highest one (α=6°). Results will be compared in terms of global aerodynamic forces and pressure coefficient distributions. Moreover the new deformed shapes derived from the application of both approaches will be compared with the original one.
Reliable method of aerodynamic analysis using computational fluid dynamics and scaled models in the development process of a Very Light Airplane
Authors: Olejnik Aleksander , Dziubmski Adam , Kiszkowiak Lukasz 
Published: January 2021

Abstract
In past decades a massive improvement of computational fluid dynamics (CFD) methods and the rapid increase of computational resources made it possible to simulate a lot of phenomena appearing during the flow of fluid around objects. In following paper a reliable method of aerodynamic analysis using both CFD and scaled models in the development process of a Very Light Airplane have been presented. A method of preparing a numerical model of an airplane and the aerodynamic analysis methodology have been shown. A numerical calculations using finite volume method implemented in specialized software were performed. What is more important, to perform the aerodynamic tests in wind tunnels, scaled models of an airplane have been prepared using the modern and fast manufacturing technologies, including 3D printing and CNC machining. The results have been shown in the graphs form of aerodynamic force and moment components as function of angle of attack. During research an influence of structural parts of an airplane on aerodynamic characteristics have been analyzed. The qualitative results of a flow around the aircraft body have been presented in form of parameter distribution maps on the airframe surface have been shown. Visualization of pressure distribution have been extended with path lines visualization of the flow. The research described in the paper is an example of professional and innovative approach to the subject matter.
Generative design case study of a CNC machined nose landing gear for an unmanned aerial vehicle
Authors: Zaimis I , Giannakis E , Savaidis G 
Published: January 2021

AbstractGenerative design is a design method inspired by nature’s evolution, pushing the limits of the industry to new design solutions. Using minimum input requirements, the resulting designs can be structurally adequate, weight-optimised and almost production-ready. The main purpose of this paper is to present the different approaches of the standard engineering design and the generative design methods. This is achieved through the case study of a nose landing gear for a prototype tactical unmanned aerial vehicle, intended for low volume production. The first part of the paper outlines the conceptual design of the nose landing gear. Subsequently, during the preliminary phase, the stress distribution along the different parts is calculated, based on the classic Strength of Materials theory and therefore a design solution is produced. In the second part, a generative design study is carried out with a commercially available tool, based on the conceptual parameters previously chosen. Both concepts are studied with industry-standard finite element analysis tools in order to validate, from a theoretical standpoint, the strength requirements according to the STANAG 4671 regulation. The final structure will be manufactured with 3-axis CNC machining, while providing about 36% weight reduction without compromising the structural functionality.
An overview of the new research infrastructure for rotating labyrinth seals at COMOTI
Authors: Gherman B , Flore L , Carlanescu R , Enache M S , Anghel O , Radu A G 
Published: January 2021

Abstract
In this article will be described the improved test stand for rotating labyrinth seals that will be developed at COMOTI. The present test rig is able to test only a seal configuration in a simplified environment, (air temperature max.150° C, labyrinth diameter max. 300 mm, airflow rate max. 0.35 kg/s, pressure max. 9 bars). The newly improved research infrastructure will be able to increase these limits up to: 800°C temperature, 600 mm labyrinth diameter, 10 kg/s airflow rate and 50 bars pressure. The upgrade performed on to this research facility will comprise of a test rig for experimental measurements; a air supply station with two centrifugal compressors; an air cooling tower; a air tank to store high pressure air and an air heater station capable to supply air with 800°C.
Development of top-level requirements for regional aircraft based on the needs of the Russian market
Authors: Karpov A.E. , Nesterenko B.G. , Ovdienko M.A. , Varyukhin A.N. , Vlasov A.V 
Published: January 2021

Abstract
The share of regional flight traffic is estimated as 10% of all air transport network in Russian Federation. According to the federal plans on infrastructure improvement, the regional aviation in Russia should provide public transport accessibility of remote areas. Thus the actual task is to provide economically efficient aircraft for local airliners in one hand, and to satisfy the upcoming regulations on ecology standards. One of the solutions is seen in development of regional aircraft with hybrid electric power engine. The paper includes the analysis of current state and trends of the interregional air transport system of Russia for the period 2030 – 2035. It gives, in addition, a composition and a volume of commercial traffic performed by the regional fleet. Also, some results of operational requirements assessment and the analysis of technical excellence of commercial regional aircrafts are presented. The assessment of the environmental requirements for this class of aircraft was carried out on the basis of ICAO standards.
Power control system for lightweight electric aircraft
Authors: Zagumennov F A , Varyukhin A N , Kazakov A V , Zhuravlev D I , Zakharchenko V S , Ivanov G.S. 
Published: January 2021

Abstract
This article describes the development and key features of the lightweight electric aircraft power system. The overview includes internals of main power control units and propulsion system rigging, hardware parts selection guide and fail-safe features in hardware and software of aircraft. The propulsion system includes lightweight solution utilizing brushless DC (BLDC) motor with a propeller as the main thrust generator, and a control system, which consists of insulated gate bipolar transistors (IGBT) 3-phase bridge and control system, as well as a special optical-insulated throttle controller. Main power control system automatically starts up aircraft modules and provides all the necessary information coming from the sensors. All of the key components in aircraft are connected through Controller Area Network (CAN) interface. To create a strong protection against surges and electric interference special cabling and interfacing aspects between several systems of lightweight aircraft are described. Part of the article provides a future extendibility, versatility and economical concepts.
Numerical Methodology for Aerostructures Hail Impact Damage Prediction
Authors: Ivancevic D. , Zakan I.Badurina , Smojver I. 
Published: January 2021

Abstract
The two numerical approaches for modelling of soft-body impact in Abaqus/Explicit have been applied in this work for prediction of high-velocity hail impact damage in aeronautical structures. The applied methods are the CEL (Coupled Eulerian Lagrangian) and SPH (Smoothed Particle Hydrodynamics), while the impacted structure is a metallic slat structure. Comparison of the CEL and SPH methods has been performed by impact simulations at a rigid plate, aimed to validate the applied material model, and by simulation of the slat structure impact. Two material models have been applied to study the effect of high strain-rates at the damage process in the metallic structure. The first is the standard isotropic plasticity model that defines material failure based on the value of equivalent plastic strain. The second constitutive model in the analyses is the Johnson-Cook model that includes the effects of strain rate and temperature on the material failure process. The simulations have been stable, illustrating the robustness of Abaqus/Explicit in these highly nonlinear impact cases. Compared to the CEL, the SPH method is computationally more efficient.
Sloshing induced damping in vertically vibrating systems
Authors: De Courcy J J , Constantin L , Titurus B , Rendall T C S , Cooper J E 
Published: January 2021

Abstract
All aircraft are subject to a range of loading throughout ground and flight operations, which ultimately define the sizing and weight of the aircraft structure. Active and passive loads alleviation technologies provide an approach to reduce dynamic loads arising from atmospheric gusts and turbulence, leading to more fuel-efficient aircraft designs. Within the H2020 SLOWD project, fuel sloshing is being considered as a method for alleviating loads in aircraft wings via an increase in effective damping. Recent work has considered the transient response of a vertically vibrating, single degree of freedom system coupled to a rectangular liquid-filled tank. This research revealed identifiable dissipation regions in the free vibration responses characterised by their own distinct equivalent damping ratio values. In this work, free surface displacement has been extracted from high-speed camera footage during the chosen sloshing regimes, which are representative of a decaying parametrically excited fluid. These results are compared against a fluid-structure coupled numerical model based upon smoothed particle hydrodynamics, previously shown to have good agreement with the experimental damping response. Further analysis of the free-surface response of the numerical solution notes a presence of an undesired travelling longitudinal wave. The analysis of this discrepancy between the model and experiment is then used to improve the numerical formulation, showing a requirement for modelling surface tension.
A concept for an Integrated Mission Management System for Small Air Transport vehicles in the COAST project
Authors: Di Vito V , Grzybowski P , Rogalski T , Maslowski P 
Published: January 2021

Abstract
Small Air Transport (SAT) is emerging as suitable transportation means to allow efficient travel over a regional range, in particular for commuters, based on the use of small airports and fixed-wing aircraft with 5 to 19 seats, belonging to the EASA CS-23 category. In this framework, Clean Sky 2 Joint Undertaking, in the European Union’s Horizon 2020 research and innovation program, funded the project COAST (Cost Optimized Avionics SysTem), which started in 2016 with the aim of delivering key technology enablers for the affordable cockpit and avionics, while also enabling single-pilot operations for aircraft in the SAT domain. In the project, some relevant flight management technologies to support single-pilot operations are considered, namely the ones of tactical traffic separation and enhanced situational awareness, meteorological enhanced awareness, and pilot’s incapacitation emergency management. These technologies have been subject to a dedicated design and implementation process, based on an individual approach where each of them has been considered as independent and dedicated single-pilot operations enabling technology. Nevertheless, during the project execution, it emerged the opportunity to consider proper integration and enhancement of such technologies to design a unique Integrated Mission Management System (IMMS). Such IMMS technology has been considered as a potential solution to support the more effective and safe management of situations of pilot’s incapacitation during the flight, under single-pilot operations, and as a relevant step forward towards more autonomous aircraft. Based on these considerations, Clean Sky supported and funded proper extension of the COAST project scope, to include the design of the additional Integrated Mission Management System. This paper, therefore, aims to outline the main concepts implemented by the baseline individual technologies (Flight Reconfiguration System, Tactical Separation System, and Advanced Weather Awareness System) already considered in the COAST project and representing the basic building blocks towards IMMS and, after that, aims to introduce the IMMS motivations and opportunities. Furthermore, the paper describes the main functionalities expected to be implemented by the Integrated Mission Management System and, finally, the expected design and implementation process.
Building Digital Transformation to improve NGCTR design and simulation
Authors: Sesana Michele , Bardelli Alessandro Pietro 
Published: January 2021

Abstract
new technologies and increasing accessibility of powerful hardware are opening a new world of opportunity to digitalize current processes making them more efficient. The paper will discuss the process of digital transformation of the NGCTR flight test campaign in which the new big data analysis technologies have a central role in the gathering, storing analyses and provision of evidence about what happened during flight. The new approach is enabled thanks to a powerful big data analysis cluster which have been tailored to best support the specific process.
Methodologies for the initial design studies of an innovative community-friendly miniliner
Authors: Trainelli Lorenzo , Riboldi Carlo E.D. , Rolando Alberto , Salucci Francesco 
Published: January 2021

Abstract
The present paper illustrates some of the strategies adopted to set the top-level aircraft requirements for an innovative near-zero emission miniliner. This novel 19-seater is conceived to provide a micro-feeder service, devised to exploit the existing European network of small local airports and airfields as feeders to hubs, as well as an intercity service to enhance connections between destinations that are not served by efficient ground transportation. First, a survey of the current network of airports and airfields is carried out and the existing ground transportation is analysed. Secondly, the potential demand for the microfeeder and intercity services is estimated based on the assessment of the time advantage between ground based means of transport and the miniliner option. Application examples in different geographic contexts provide useful information for the definition of crucial design requirements such as payload, range, runway length, and cruising airspeed.
Smart energy systems and smart metering systems in them
Authors: Zatsarinnaya Yu N , Grigoreva M O 
Published: January 2021

Abstract
The authors of the article evaluated the level of digitalization and the achieved effects during using digital technologies by means of the digitalization index at present and its predicted values. Tools were given to support and stimulate prosumers as active participants in smart energy s3ystems. The integration into the power supply system of 2 prosumers is considered – a logging plant and a shopping center. Their consumption of electricity from the network is analyzed in the case when the generation of electricity from its own sources is insufficient from 2018-2019. The calculations were carried out in several price categories. The calculations showed that in the conditions of accurate planning, in the absence of emergency situations, prosumers who are legal entities can save. To switch to these calculations, it is necessary to install metering devices that allow you to measure hourly consumption. Thus, the smart energy system allows the consumer to choose a price category that suits him based on the energy consumption data of previous months.
Virtual simulator of a boiler room
Authors: Kocharyan E V , Shaposhnikov V V , Macharashvili A S 
Published: January 2021

Abstract
The use of virtual simulators, computer models of equipment and production processes, is already a necessity in the modern world. Teachers of KubSTU have developed and tested a virtual simulator of a hot-water boiler for theoretical training and development of skills in the work of both future and current thermal power engineers. This simulator is not only an effective learning tool but also the basis for creating a remote control system for a complex production facility, which is a boiler room.
The main problems and solutions to the management of the electric power system by the example of metropolis power supply
Authors: Chemborisova N Sh , Pogorelets M Yu 
Published: January 2021

Abstract
Developments of electric power systems of Russia as well as foreign electric power systems are on the way of the annual complications. This trend can be well observed in the example of the development of electric power systems of large agglomerations - metropolises. We should also mention that along with this complication new labor-intensive tasks arise - increasing the reliability, improving the management of modes and ensuring the survivability of electric power systems, in this regard, we can distinguish the following factors:
• increasing the number of interconnected power facilities;
• growth of the maximum installed capacity of the power system;
• complication of the electrical network;
• complication of ensuring the required level of controllability of objects;
• increasing of short circuit currents.
Thus, designers of electric power systems often use the principle of multi-factority in their design, which ultimately just affects the complexity of electric power systems, leading to a large number of configurations of network circuits that have different capabilities, properties, technical and economic indicators.
Influence of light on electrophysical properties of thin films of mixed zinc and tin oxides
Authors: Petrov V V , Bayan E M , Varzarev Yu N , Volkova M G , Storozhenko V Yu , Rozhko A A , Nesterenko A V 
Published: January 2021

Abstract
In this work, we studied structural and the electrical properties of thin films of mixed zinc and tin oxides obtained by low-temperature pyrolysis. XRD analysis shows that the obtained films contain phases of zinc oxide and tin dioxide and have nanocrystalline structure with crystallite size about 10-17 nm. A significant effect of daylight on the temperature dependences of the film resistance was established. The temperature dependences of the resistance of ZnO-SnO2 films, measured in the range from room temperature to 300 °C, show the difference between the heating and cooling curves, that can be explained by two competing processes - thermal activation mechanism of conductivity and adsorption-desorption of oxygen particles on the surface of the oxide film. Using the slope of the linear section on the plots, we calculated the activation energy of conductivity, which amount is 0.7 and 1.1 eV for the samples with the different Zn:Sn ratio.
Vertical axis wind power plant
Authors: Belyakov P Yu , Pisarevsky Yu V , Tikunov A V , Pisarevsky A Yu , Chernykh T E 
Published: January 2021

Abstract
The issue of developing technologies using alternative renewable energy sources today is a very urgent task both around the world and in Russia, which is explained by economic, technological, and, most importantly, environmental factors. The climatic and geo-graphical features of our country create all the necessary conditions for the use of such areas as solar energy, small hydro energy, wind energy, etc. But the most promising in terms of energy potential is wind energy, as many regions of our country are located in areas with high average wind speeds. However, there are a number of problems that impede the development of wind energy in Russia, the most important of which is the almost complete absence of wind generators designed and manufactured in our country that could compete with foreign models. The product proposed in the article is an attempt to solve this problem through the use of a new design of a wind wheel and an electric generator, as well as the use of magnetic suspensions.
Digital control of structurally unstable power facilities using a polynomial approach
Authors: Zakhvatov V I , Podvalny S L , Mikhailusov A V 
Published: January 2021

Abstract
The problem of improving the quality of control of structurally unstable power facilities is viewed based on a polynomial controller with a dynamic change in settings using the inverse pendulum on a carriage as an example. The mathematical model of the control object was built; a polynomial controller was synthesized using the method of symbolic computation of systems of differential equations with an additional input for specifying the geometric mean root from the outside. Reverse pendulum model on a carriage and a model of regulators were created using the MATLAB Simulink visual modeling environment to analyze the quality and parameters of the created control system. As a result of modeling, direct dependence of the position setting time of pendulum on the value of the geometric mean root was obtained which confirmed the possibility of external control of the speed of the control system. The possibility to control the control actions level to prevent saturation of executive devices was investigated and confirmed. In fact, a system of external parametric control of the processes dynamics was created and the described regulator does not require adaptation and training.
Intelligent identification of telecommunication channels in the distributed systems for digital control of power facilities
Authors: Podvalny S L , Likhotin M A 
Published: January 2021

Abstract
This paper presents the results and problems of telecommunication power amplifier modeling. The research tool is the mathematical apparatus of artificial neural networks. Simulation of the device was made according to the black box principle, operating solely with input and output data of the power amplifier under study. The criterion for the quality of model estimation was the signal-to-noise ratio adopted in radio engineering. Brief results of the previous research are shown. The problems associated with the simulation of a power amplifier operation basing on neural networks were investigated. An example is given of nonlinear distortions appearing in the device under consideration. The description is given of the joint work of a neural networks group based on analog signal clustering which works according to the principle of Grossberg’s adaptive resonance theory. The application results of this type of systems are shown. Discussing the problems concerning the use of this approach to simulation of the investigated processes.