Autor: K. W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analytical determination of the characteristics of engine power Fiat 1.3 JTD
Autorzy:: Prajwowski, K.
Gołębiewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/245356.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
power
torque
engine flexibility
Opis:: Combustion engines are commonly used in car propulsion systems. They belong to a group of heat engines, i.e. those that convert the heat obtained from combustion of liquid or gaseous fuels into mechanical work. Engine parameters, such as power output (Pd ), torque (Ttq) and adaptability to variable traffic [motion] conditions, represent vehicle motion and its functional properties. The torque (Ttq) and the crankshaft speed (n) are measured directly with the use of dynamometer at specific measurement conditions but the power (Pd ) is determined indirectly. The relationships between these parameters are presented using external characteristics. They allow determination of engine adaptability to changes in the resistance to motion, i.e. its flexibility (E). In the paper, flexibility and analytical determination of the power and torque curves through application of Leidemann’s formulas are discussed. Results of the research conducted with the use of turbocharged compressionignition engine equipped with Common Rail fuel system are presented. The correlation between the power and torque curves based on Leidemann’s formulas and the real curves obtained on the basis of experimental research (with application of engine dynamometer) are verified. Finally, evaluation of the method applied for determining the power curves by the speed range of FIAT 1.3 JTD engine was made.
Źródło:: Journal of KONES; 2014, 21, 2; 267-272
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A valved two stroke engine as a new power source
Autorzy:: Mitianiec, W.
Buczek, K.
Powiązania:: https://bibliotekanauki.pl/articles/245638.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
engine development
two-stroke engine
valve timing
pollutants
Opis:: The present work defines main conception of modern, efficient and ecologic two-stroke engine. It indicates the scope of necessary modifications that have to be made in typical four-stroke engine to prepare it to work in two-stroke mode. Taking into account some limitations (especially in valve train design) authors performed several analyzes in order to check the possibility of proper scavenging process and obtain main engine characteristics. The paper contains description of simulation approach and selected mathematical models that was applied in carried over analyzes. The results of foregoing simulations, which were obtain taking advantage of GT-Power software should be considered as preliminary since several parameters have to be defined during research and 3D simulations. In order to expose advantages of modern two-stroke engine a simple comparison of it and its predecessor was performed taking into consideration BSFC maps. The objects of simulation were fluid flow, scavenging and combustion. This comparison indicates that proposed two-stroke engine achieve significantly less break specific fuel consumption (up to 27 g/kWh drop). Paper presents diagram of new type two-stroke engine with poppet valves, which is probably the most feasible layout of two-stroke engine, and GT-Power model of simulated single-cylinder engine based on four-stroke single cylinder engine.
Źródło:: Journal of KONES; 2009, 16, 3; 259-268
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Gas exchange in valved two-stroke SI engine
Autorzy:: Buczek, K.
Mitianiec, W.
Powiązania:: https://bibliotekanauki.pl/articles/245914.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
engine development
two-stroke engine
boosting
Opis:: The paper describes the work of high speed charged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice ofvalve timings, geometrical parameters of inlet, outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations performed in GT-Power in previous authors' research and carried out in CFD code (KIVA 3 V) for different engine configurations. The initial results included in the paper show influence of inlet port geometry and charge pressure on engine scavenging process. Additionally, optimum fuel spray injector position was considered in order to obtain proper fuel vaporization and avoid significant wall-wetting. The simulation results show that the nitrogen oxides arę considerably reduced in comparison to four-stroke engines because ofhigher internal exhaust gas recirculation. The innovation of this proposal is applying of poppet intake and exhaust valves with turbocharging in the two-stroke engine and obtaining a significant downsizing effect. The conclusion shows the possibilities of proper gas exchange process in this type of two-stroke engine and thus, the feasibility of its application as a power unii for transportation means with higher total efficiency than traditional engines with possible change of engine work in two modes: two- and four-stroke cycles.
Źródło:: Journal of KONES; 2010, 17, 1; 73-80
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of thermal loads in air cooled SI engine
Autorzy:: Mitianiec, W.
Buczek, K.
Powiązania:: https://bibliotekanauki.pl/articles/246432.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
heat transfer
Opis:: In the spark ignition engines with air cooling system the thermal loads of the cylinders and cylinder heads are much bigger than in the water-cooled engines and the loads are not uniform on the whole surface of these elements. Recently most of the cylinders and cylinder heads of the two-wheel vehicles had long ribs that caused a bigger noise and an increase of the mass of the elements. The paper includes the modelling process of the thermal loads and temperature distribution of the cylinder and cylinder head of the two-stroke engine 115 cm3 capacity cooled by air at mean engine load. The results of simulation carried out in ANSYS program with creation of the mesh in CATIA were verified by the experiment on the real engine. The results obtained in the tests and the simulation show, that long ribs have not an effect on the decrease of thermal loads of the cooling elements. The paper includes the colour graphs with deviation of the parts, temperature on the surfaces and thermal stresses. Maun work results allow finding that the cooling heat in the air-cooled two-stroke engine increases with the engine speed and cooling energy, boundary condition enables determine the convection coefficient for heat exchange calculations and FEM enables the prediction of the surface temperatures of the walls, the accuracy of temperature depends on the determination of the outflow temperature of the air.
Źródło:: Journal of KONES; 2007, 14, 3; 403-410
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical standard tests of railway carriage platform
Autorzy:: Chłus, K.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/246494.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ACTS intermodal wagon
standard strength test of the structure
FEM
numerical analysis
Opis:: The object of the paper is to build a numerical model of a railway wagon and perform statics calculation. The examined railway wagon is designed to transport interchangeable containers in ACTS (Abroll Container Transport System). The essential matter of such reloading is placing the container on a special rotating platform, which enables horizontal reloading of the load on the truck. The carriage is equipped with a flat frame cooperating with two bogies and three mobile platforms rotated in respect to central knots in order to simplify the process of loading and unloading of the interchangeable containers. A numerical model was verified and validated by experimental and numerical tests. Particular attention was paid to the support model in a contact place of the frame-carriage and bogies. The paper presents the results of static calculations prepared in accordance with relevant standards for this type of construction. The numerical model was loaded according to the requirements of PN-EN12663 standard specified for the F-I vehicle and BN-77/3532-40 standard. The finite element method was used for numerical analysis. A discreet FEM model was developed with the aid of MSC Patran pre-processor, while MSC Nastran code was applied for simulations. The results of calculations are presented by displacement and stress characteristic. Strength of construction was determined based on results.
Źródło:: Journal of KONES; 2012, 19, 3; 59-64
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigations of engine exhaust gas emission with oxygen enriched mixture and high exhaust gas recirculation
Autorzy:: Mitianiec, W.
Śliwiński, K.
Powiązania:: https://bibliotekanauki.pl/articles/247231.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
combustion engine
EGR
oxygen enriched mixtures
emission
Opis:: The paper presents an explanation of the formation process of toxic exhaust gas components during combustion process of oxygen-enriched mixtures in SI engine. In order to explain this phenomenon the simulation process was carried out, in which the experimental data from dynamometer tests of the 4-stroke SI engine were used. The tests were done at different oxygen volumetric ratios and at increased exhaust gas recirculation ratios until the mixture of oxygen and exhaust gases has not contained any nitrogen. The EGR system was applied in order to decrease gas temperature in the cylinder. Simulation of engine combustion process with oxygen-enriched mixture and with different EGR ratios was carried out by using the program Kiva3v for calculation of full engine phenomena with simple combustion model. This combustion model took into account 10 kinetic and equilibrium chemical reactions. Both experimental and simulation test indicated nonlinear variation of mole fractions of carbon monoxide and carbon dioxide with increasing of oxygen amount in the charge from 21% to 32% by volume. The engine has higher emission of carbon monoxide and carbon dioxide in comparison to the emission of the engine filling with air-fuel mixture in normal conditions. The paper explains from chemical reactions point of view a non-linear change of CO and CO2 emission in a function of the charge oxygen mass ratio at constant oxygen excess ratio. The paper presents the graphs showing variations of emission and volumetric concentration of chosen chemical species in the charge in a function of crank angles and variation of the engine parameters at different EGR and oxygen ratios in the engine charge.
Źródło:: Journal of KONES; 2014, 21, 3; 235-243
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Possibility of corrosion monitoring resistance of austenitic steel for ship construction
Autorzy:: Jurczak, W.
Jurczak, K.
Powiązania:: https://bibliotekanauki.pl/articles/247396.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: electrochemical corrosion
austenitic steel
monitoring
Opis:: The article presents the investigation results on possibility of electrochemical corrosion monitoring of the 1.3964 steel used for ship construction according of the patent Pl 216723. The patent’s assumption describes the method of on-line registration of electrochemical potential specifying the protective effectiveness of a thin oxide layer formed spontaneously on the steel surface. Essentials drop of the potential’s value with respect to the stationary one indicates layer cracking and initiation of pitting corrosion. Such a corrosion can be initiated by salinity and temperature of seawater and/or by a mechanical factor (strain). The carried out measurements of the potential and mechanical-electrochemical teats made it possible to determine the stress level causing the crack of oxide layer and initiation of corrosion processes in the steel. Thereby, the mechanical properties (Rm and A5) thin passive oxide layers investigated steel. Application of Electrochemical Impedance Spectroscopy (EIS) in the laboratory allows monitoring of weakness (stratification) of the film as a stage preceding to fracture [1, 2]. Stress cracking of the protective oxide layer on the 1.3964 steel takes place beyond the exploitation zone (above the tensile strength) and there is no indication to monitor the corrosion resistance on ship construction made of this stainless steel. However, in specific cases when temperature of the steel exceeds 40oC, application of the monitoring may be justified.
Źródło:: Journal of KONES; 2016, 23, 1; 131-138
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The numerical - experimental analysis of ablative laser cleaning nickel - based superalloy
Autorzy:: Kosiuczenko, K.
Napadłek, W.
Powiązania:: https://bibliotekanauki.pl/articles/248048.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: superalloy ŻS6K-WI
laser ablation cleaning
numerical simulation MES
Opis:: The results of simulation the laser ablation cleaning for the surface of samples made for nickel-based superalloy ŻS6K-WI. this material is use to produce the first-degree blades of aircraft engine turbines. The laboratory investigations were used pulse neodymium laser Nd: YAG and laser ytterbium Nd: Y3Al5O12. In parallel with the experiment was performed numerical simulation of ablation process. The simulation results were used for selection of appropriate laser parameters (duration, pulse form and the course of pulse in time, power density). the short time of the phenomenon of ablation process (similar to 10 ns), the authors have chosen the finite element method (FEM) contained in the LS-Dyna. Since it is known that, the rate of thermal deformation is very large, for modelling the material properties of the material model was used Thermal-Elastic-Plastic. So chosen material model allows the dependence of material parameters (E, alfa, ni, Re, ET, Cp, k) on temperature. Scheme of laser ablation, diagram of laser power density, physical model, identification depth of the ablation, area where the temperature exceeded the melting temperature, in successive moments of loading are presented in the paper.
Źródło:: Journal of KONES; 2012, 19, 1; 187-190
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Simulative comparison of the traction properties of Daewoo Lublin 3 Mi van with particular types of gearbox
Autorzy:: Prajwowski, K.
Gołębiewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/244475.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: traction characteristics of a vehicle
theory of motion
combustion engines
external characteristic of an engine
power transmission system
Opis:: A problem of comparing the traction properties of Daewoo Lublin 3 Mi van with respective types of gearbox has been taken up in the paper. There were three gearbox types: TS5-21, PD.97 and ZF. These properties were concluded based on vehicle traction graph. They included: reaching the reserve driving force in respective gears, obtaining accelerations, overcoming the resistances to motion (rolling resistance, air resistance and grade resistance) as well as achieving the maximum speed. Vehicle traction diagram has been made based on the torque curve of Andoria 4CTi90 engine external characteristics obtained on engine test bed in a direct way using an AVL eddy current brake. The engine was supplied with a complete fuel dose and loaded with the resistance torque produced by engine brake. The characteristics was performed every 200 rpm from 1000 rpm to maximum revolutions and the other way from maximum revolutions to 1000 rpm every 200 rpm. The torque characteristics points were determined as a mean value obtained from these two measurements. After considering the data from engine external characteristics, vehicle information (including, among others, respective gear ratios and final drive ratio, under-the-bonnet power loss coefficient, and dynamic wheel radius) and the resistances to motion, a vehicle traction diagram of Daewoo Lublin 3 Mi van was made for three types of gearboxes. Based on this, the authors found that a Daewoo Lublin 3 Mi van equipped with ZF gearbox is the best from the point of view of traction properties.
Źródło:: Journal of KONES; 2011, 18, 1; 483-490
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Aerodynamic and mechanical design of micro class UAV for aerodesign international competition
Autorzy:: Figur, K.
Lorenc, W.
Powiązania:: https://bibliotekanauki.pl/articles/950097.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: unmanned aerial vehicles
drone
Aero Design
aircraft design
bezzałogowy statek powietrzny
dron
projekt samolotu
Opis:: Aero Design is an annual student competition held by Society of Automotive Engineers in which the goal is to design and build a flying UAV capable of lifting the highest payload while observing lowest payload weight and fitting in a specified carrying case. The most important aspect in aircraft design is choosing suitable aerodynamic and mechanical configurations for example: aircraft and wing layout, airfoil with the correct Reynolds (in this case low) number, airframe, and landing gear construction. The article presents airfoil selection, trade studies, tail aerodynamic design, tail sizing, drag analysis, calculations of stability, stress analysis, propulsion selection and manufacturing of UAV prototype. In particular, the comparison of different aircraft designs, effect of taper ratio on lift distribution, the design of wings, lift vs. angle of attack curves and. angle of attack curves, the aircraft tail surfaces, fuselage design are presented in the article. The aim of this study was to perform analysis of aerodynamic and mechanical of Micro Class UAV for Aerodesign International Competition. All projects will be doing in a prototype technology demonstrator was built to confirm our assumptions about airfoil's performance. Flight tests were successful. Analytical model was made and put into an excel spreadsheet. Maximum predicted payload was estimated to be 5.5 pounds.
Źródło:: Journal of KONES; 2017, 24, 1; 137-141
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Elaboration of concept of road vehicles transporting dangerous goods in controlled temperatures
Autorzy:: Bienczak, K.
Zwierzycki, W.
Powiązania:: https://bibliotekanauki.pl/articles/246201.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transportation
dangerous goods
controlled temperature
Opis:: According to ADR rules certain self-reactive materials of the class 4.1 as well as organie peroxides of the class 5.2 require to be transported in so called controlled temperatures, with the use of cooled means of transport, for which the particular stipulations have been formulated. This paper is an attempt to answer the ąuestion whether the mentioned stipulations can be met by vehicles applied in other specialist transport domains (for example, for cooled food transportation) and an attempt to formulate assumptions for design (and equipment) of universal categories of isothermal cooled vehicles designed only for transportation of materials of the class 4.1 and 5.2 in controlled temperatures. The paper presents as follows: a concept of controlled and emergency temperatures being derivatives ofso called self-accelerating decomposition temperature(TSR) of materials of the class 4.1 and 5.2, requirements concerning vehicles for transport in controlled temperature(including methods designated from R l to R5), technical requirements concerning realization ofcooling in methods from Rl to R5 (referring to transport chamber controlled temperature). The summary presents ready and final technical solutions concerning transport of dangerous materials in controlled temperatures.
Źródło:: Journal of KONES; 2009, 16, 1; 35-40
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Numerical simulation the finite element method (FEM) of stress and strain for the chosen coatings TBCs on turbine blades loaded with laser impulses
Autorzy:: Kosiuczenko, K.
Napadłek, W.
Powiązania:: https://bibliotekanauki.pl/articles/248121.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: superalloy ŻS6K-WI
laser ablation
numerical simulation MES
Opis:: This paper presents the results of laser ablation the barrier coating TBCs (Al2O3, ZrO2) generated on aircraft engine turbine blade made for nickel base alloy ŻS6K-- WI. Authors used neodymium impulse Nd: YAG laser, radiation with a wavelength of 1064 nm. In parallel with the laboratory experiment was performed numerical simulation of laser ablation. FEM simulation results were used for to choose the relevant laser parameters (impulse duration, impulse shape and course in time, power density) and to identify the temperature distribution heat fluxes and the state of stress and strain in the critical zones of the barrier coating TBCs. The simulation was carried out using the finite element method program LS-Dyna. On the basis of numerical simulation shown the influence of the impact layer TBCs as a thermal insulation and shown place the appearance of destructive deformation. Defined distributed tension as a function of time and estimated time destruction parts the barrier layer during the laser ablation micromachining. Model 3D of the engine turbine blades DV - 2, Analyzed piece of blade, physical model, temperature maps, maps of the reduced stress are presented in the paper
Źródło:: Journal of KONES; 2012, 19, 1; 183-186
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Dynamic analysis of railway platform chassis model
Autorzy:: Chłus, K.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/242171.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: mechanics
strength of construction
FEM
dynamic analysis
railroad wagon
Opis:: The aim of the paper is to build a numerical model of a railway wagon, to perform statics calculation as well as to compare the calculations results with the experimental results of measurement of a real railway wagon maximal deflection and to conduct dynamic analyses. The examined railway wagon was designed to transport interchangeable containers in ACTS (Abroll Container Transport System). The essential matter of such reloading is placing the container on a special rotating platform which enables horizontal reloading of the load onto the truck. In order to perform strength and dynamic numerical analyses with a finite element method (FEM), a 3D coat-beam model of the wagon were prepared. The discreet FEM model was executed with the aid of MSC.Patran preprocesor and for calculations MSC Nastran program was applied. The obtained results were verified by the experimental results of measurement of real railway wagon maximal deflection. The correctly verified model was applied both for modal analysis of free vibration and time dependent dynamic analysis. The influence of dynamic load on construction strength was examined. The loading model was selected so as to represent hypothetical simultaneous loading of the containers on the carriage frame. It turned out that the most strenuous element during the simulation of loading the containers onto the frame was the element of the vertical reinforcing plate which is in the direct contact with the pivot support of the carriage.
Źródło:: Journal of KONES; 2011, 18, 2; 93-100
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Preliminary research of the diesel knock phenomenon with using of the crankshaft acceleration method
Autorzy:: Górski, K.
Lotko, W.
Powiązania:: https://bibliotekanauki.pl/articles/242350.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel knock
transient conditions
combustion process
acceleration method
wavelet transform
alternative fuels
Opis:: Paper presents an experimental study on the pressure variations inside of 3 - cylinder, a direct injection AD3.152 type diesel engine. The main aim of the preliminary engine test was to use of the crankshaft free acceleration method for detection of diesel knock phenomenon. For this research, each combustion chamber was equipped with AVL cooled pressure sensor mountedat the top of engine head. Using of such sensors and special prepared at Technical University of Radom data acquisition system allow to record time histories of in-cylinder pressure variations at conditions of free acceleration of the engine crankshaft. Results presented in this paper show, that such transient engine conditions can be successfully used for detection of diesel knock phenomenon. High frequency pressure oscillations, typical for knocking were observed in the first phase of the acceleration process for selected combustion chambers. Experimental tests have been done for engine fuelled with regular diesel oil (DF) and its blend with Ethyl Tert Butyl Ether (ETBE) used as an oxygenated additive. Engine test procedure, used methodology and data acquisition system and engine test results carried out in non-stationary conditions with using of crankshaft acceleration method are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 2; 141-148
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Computational investigations of active flow control on helicopter - rotor blades
Autorzy:: Stalewski, W.
Sznajder, K.
Powiązania:: https://bibliotekanauki.pl/articles/242558.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: rotorcraft
rotor aerodynamics
active flow control
Active Gurney Flap
URANS
ANSYS Fluent
Opis:: The paper presents results of the first stage of the research conducted within the frames of Active Rotor Technologies, which is the dynamically developed sub-domain of Rotorcraft Engineering. The research concerned a computational modelling and investigations of new solutions aiming at improvement of performance of modern helicopters and their environmental impact, by active control of operation of their rotors. The paper focuses on one of such solutions applied for the active control of airflow around helicopter-rotor blades. This solution is the Active Gurney Flap – a small, flat tab located at a pressure side of rotor blade near its trailing edge, which is cyclically deployed and stowed during rotation cycles of the blade. The Active Gurney Flap seems to be very promising solution which will enable helicopters to operate with reduced power consumption or reduced main rotor tip speed whilst preserving current flight performance capabilities, especially in terms of retreating blade stall. The newly developed methodology of computational modelling of active-flow-control devices, like Active Gurney Flap, applied for enhance a helicopter performance and improve its environmental impact, has been presented. Development of the methodology was the challenging task, taking into account strongly unsteady character of modelled phenomena and large differences of scales in both the space and time domain, where very small, dynamically deflected tab strongly influences the flow around rotating, large main rotor. Exemplary CFD simulations, presented in the paper, have been conducted to validate developed methodology.
Źródło:: Journal of KONES; 2014, 21, 2; 281-288
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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