Journal of KONES. Powertrain and Transport最新文献_第9页

WIND TUNNEL INVESTIGATION OF THE WING LOAD CONTROL USING SELF-SUPPLYING FLUIDIC DEVICES 自供流装置控制机翼载荷的风洞研究

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133889

A. Krzysiak

{"title":"WIND TUNNEL INVESTIGATION OF THE WING LOAD CONTROL USING SELF-SUPPLYING FLUIDIC DEVICES","authors":"A. Krzysiak","doi":"10.5604/12314005.1133889","DOIUrl":"https://doi.org/10.5604/12314005.1133889","url":null,"abstract":"The wing-load-control systems are developed as a mean to modify a distribution of aerodynamic load on the wing. Such systems are usually used in extraordinary, off-design flow conditions. Particularly, it concerns the reduction of bending loads during accelerated flight manoeuvres or sudden gusts. In such situations, rising bending loads may lead to fatigue damage of the wing. A new concept of active flow control system based on self-supplying blowing devices for the control of the aerodynamic load on aircraft wing was designed in Institute of Aviation and tested in IoA low speed wind tunnel. The study was carried out in the framework of the European project STARLET. The project scope comprises two systems of fluidic control devices: the nozzles blowing air in direction normal and inclined with respect to the upper wing surface, located at 40-70% of wing chord, as classical spoilers, and an alternative system composed of specially designed nozzles located on a modified trailing edge surface. The fluidic control devices were supplied with air from the high-pressure area situated at lower wing surface close to its leading edge. The experimental tests were performed in low speed wind tunnel T-3 (5-meter diameter test section) in the Institute of Aviation. For these tests the model of semi-span wing (2.4 m span) situated vertically on the endplate in wind tunnel test section was used. The model was situated on the two aerodynamic wall balances. To measure the load distribution along the semi-span wing model the 8 strain-gauge bridges were glued to the model front spar, the straingauge bridges were arranged in 14.6% wing chord. Wind tunnel test were performed at Mach number M = 0.1.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127162825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of finish tooling on friction properties of steel applied to sea water pump shafts 精加工对海水泵轴用钢摩擦性能的影响

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133893

W. Labuda, A. Charchalis

{"title":"The influence of finish tooling on friction properties of steel applied to sea water pump shafts","authors":"W. Labuda, A. Charchalis","doi":"10.5604/12314005.1133893","DOIUrl":"https://doi.org/10.5604/12314005.1133893","url":null,"abstract":"Angular momentum pumps are very often applied on-board ships. These pumps are used in cooling circuits of medium and high power engines, power plant boilers as well as bilge, ballast and fire installations. Such an extensive use of angular momentum pumps on board is connected with their numerous advantages. However, during operation the wear of marine hull, the rotor and shaft seals take place. The research attempts to increase the service life of shafts. The article presents the research results referring to the analysis of the influence of finish treatment (finishing turning, grinding, burnishing) on the friction properties of steel applied to marine pump shafts. The research was performed on a roller 39 mm in diameter made of 304L stainless steel. The finish tooling of pump shaft pins was carry out on a universal centre lathe. The finish turning process was carried out by means of a WING WF 080408 Sandvik Coromant cutting tool with replaceable inserts. The grinding process was performed by grinding attachment for lathes. The 1 – 80x10x32 – 99C 80-N V grinding wheel was used for the process. The process of burnishing was done by SRMD single roll burnishing tool by Yamato. The burnishing process was carried out at the following technological parameters: burnishing force 1.1 kN, burnishing speed 35 m/min, feed 0.13 mm/rev. In addition, the influence of the number of burnishing tool passes on the friction was determined. The paper will present the research results of test on the friction properties examination of samples after finish machining. The experiment was performed on T-05 block-on-ring wear tester.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133014942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

DETERMINATION OF MAIN DIMENSIONS AND ESTIMATION OF PROPULSION POWER OF A SHIP 船舶主要尺寸的确定和推进力的估计

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133863

A. Charchalis

{"title":"DETERMINATION OF MAIN DIMENSIONS AND ESTIMATION OF PROPULSION POWER OF A SHIP","authors":"A. Charchalis","doi":"10.5604/12314005.1133863","DOIUrl":"https://doi.org/10.5604/12314005.1133863","url":null,"abstract":"TEU number, which is the container ships’ crucial designing factor, directly influences the main hull dimensions such as displacementi , length L, breadth B, draught T, their combinations and block coefficient CB. The main dimensions have a great impact on developing the ships resistant performance. Thus, it is really fundamental to establish the correct dimensions of the hull during the design and ship building process. Estimating the shape of the ship’s hull, that comprises its main dimensions, is one of the basic tasks as part of the preliminary design stage. The most significant decisions determining ships performance, its duration and building costs are made at the beginning of the preliminary stage, when the costs are relatively low. It is important to limit the total ship resistance, for instance, by lowering the wave ship resistance as much as possible, especially when the operational speed and TEU number carried by one vessel is increasing. That resistance depends on the operational speed expressed by Froude number. The resistance criteria and the existing hull dimensions limits, resulting from ships route, must be taken into consideration bearing in mind safety conditions such as ships stability and seaworthiness, when the main ships dimensions are being determined. In the paper are presented general rules for calculations of ship’s hull principle dimensions and total power of engines of container ship 1300TEU and 18 kn at preliminary stage of design process.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125843126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

THE EFFECT OF EXHAUST GAS RECIRCULATION ON THE PROCESS OF COMBUSTION IN THE SELF-IGNITION ENGINE 废气再循环对自燃发动机燃烧过程的影响

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133426

T. Ambrozik, Mirosław Kosno

引用次数: 3

METHOD OF DETERMINING THE STRUCTURAL PARAMETERS OF WOOD-POLYMER COMPOSITE 木材-聚合物复合材料结构参数的测定方法

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133892

L. Kyzioł, L. Murawski

{"title":"METHOD OF DETERMINING THE STRUCTURAL PARAMETERS OF WOOD-POLYMER COMPOSITE","authors":"L. Kyzioł, L. Murawski","doi":"10.5604/12314005.1133892","DOIUrl":"https://doi.org/10.5604/12314005.1133892","url":null,"abstract":"A composite material consisting of woody skeleton and polymerized methacrylate has been developed and characterized. This paper presents an experimental program and the results concerning mechanical properties and strength of wood modified with polymerized methacrylate. In the article, there are examples of structural elements made of natural wood. Wood is a composite consisting of the layers of soft and hard wood. Wood is a composite and porous material. The porosity, which is a serious defect of wood, may be simultaneously its advantage. Wood saturation with different impregnates to minimize its disadvantages. If the wood pores will fill the monomer there is obtained the wood polymer composite. This composite is classified as of fiber composites. Such composite is effectively protected against degradation; it is durable in use, and show an improvement in mechanical properties. Design constructions of surface modified wood require the determination of fundamental material constants. Therefore, for the determination of these parameters is very important obtaining the appropriate research material. The surface impregnation of wood allows obtaining strength characteristics in a function of polymer content. This allows to model it's, and then design and perform specific ship structures. In the wood, there are three directions in relation to the annual rings. Wood properties, especially mechanical properties, are different in the selected directions. For the computation takes the orthogonal anisotropy in which there are three mutually orthogonal planes of symmetry, for which there is symmetry properties of the wood.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115371998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE INFLUENCE OF RME ON MASS AND NUMBER CONCENTRATION OF NANO PM IN EXHAUST GASES FROM A DIESEL ENGINE rme对柴油机排气中纳米PM质量和数浓度的影响

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133865

J. Cisek

{"title":"THE INFLUENCE OF RME ON MASS AND NUMBER CONCENTRATION OF NANO PM IN EXHAUST GASES FROM A DIESEL ENGINE","authors":"J. Cisek","doi":"10.5604/12314005.1133865","DOIUrl":"https://doi.org/10.5604/12314005.1133865","url":null,"abstract":"Transport is a major source of the particle pollution (PM). Combustion engine particulate emissions have the potential cause adverse health effects. These effects include cancer and other pulmonary and cardiovascular diseases. A substantial proportion of the number of particles, but not the mass, is ultrafine. For example – one million particles of 100 nanometers size with a unit density of 1 g/cm3 have a mass of approximately 0.0005 g. The paper includes research results of mass and number concentration of nanoPM for 1.9 TDI VW exhaust gases fuelled by standard diesel. The measurements were performed for ambient air and 3 different point of engine work (idle speed, low and high load at 2000 rpm). For nanoPM measurements was used Electrical Low Pressure Impactor ELPI from DECATI, was found, among other things, that the biggest mass concentration was at 0.1-10 Pm of PM diameter but the biggest number concentration was at 0,01 – 0,1 Pm and thus for the size of solid particles of at least an order of magnitude smaller than the mass concentration. The biggest the negative differences in the mass concentration occur in the exhaust gases of the RME fuelled engine (in comparison with diesel fuel) at engine idling when the smallest injection pressure and temperature inside the engine cylinder exist and the oxygen availability is also the lowest (because of the small charging pressure and high EGR rate). Such measurements are important not only in terms of utilitarian but also in cognitive sense – for determining the effect of the engine construction parameters and/or regulating the engine (or the fuel composition) on the mass and the number of nanoparticles emitted in the exhaust gases.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125060064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optimizing the values of the selected scalar quantities in designing a condenser of marine steam turbine according to the adopted criteria in this designing 根据设计中采用的准则，对船舶汽轮机冷凝器设计中所选标量的取值进行了优化

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133894

K. Łukaszewski

{"title":"Optimizing the values of the selected scalar quantities in designing a condenser of marine steam turbine according to the adopted criteria in this designing","authors":"K. Łukaszewski","doi":"10.5604/12314005.1133894","DOIUrl":"https://doi.org/10.5604/12314005.1133894","url":null,"abstract":"The paper presents designing activities concerning the rating of the values of scalar quantities optimized in accordance with the accepted criteria in designing a condenser of marine steam turbine, which result from the forecasted characteristic, most frequently occurring set points of steam turbine power appearing during the operation of a sea ship. It refers to the method of designing heat exchangers contained in the paper [1] and to the issues raised in the publication [2]. The paper also presents exemplary computational results of the above-mentioned optimized scalar quantities, which refer to designing a shell and tube condenser of marine steam turbine. It was assumed in the paper that the values of mass the mass flow rate of the steam: one p m , 0.75 p m , 0.5 p m , which result from the assumed characteristic set points of marine steam turbine, which occur during the operation of a sea ship. Then, the selected designing activities referring to the above-mentioned optimization were exemplified. On the basis of the computational results, it was shown that the appropriate division of heat exchange area into the definite numbers of condensers, which results from the operation of steam turbine of a definite sea ship, increases operation effectiveness of these condensers in relation to one marine steam turbine condenser. This is a result of optimal values retention: velocity of cooling water of the definite condenser or condensers and temperature of this water on the output of this condenser or condensers during characteristic set points in the operation conditions defined in designing. Next, economic advantages were pointed out, which resulted from the described in the paper, technical solution. These advantages constitute the designing criterion that must be taken into consideration while making a decision about the division of heat exchange area into the definite number of condensers of marine steam turbine. Finally, the conclusions resulting from the paper’s contents are presented.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129730728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The opportunities for getting energy savings in the hydrostatic drive system 在液压驱动系统中获得节能的机会

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133904

G. Skorek

{"title":"The opportunities for getting energy savings in the hydrostatic drive system","authors":"G. Skorek","doi":"10.5604/12314005.1133904","DOIUrl":"https://doi.org/10.5604/12314005.1133904","url":null,"abstract":"Full picture of the energy losses in a hydrostatic drive system is a picture of the power of energy losses in the system elements. Paper presents the areas of the power fields of energy losses occurring in the elements of some hydraulic systems with different structures of the hydraulic motor speed control. Proposed graphical interpretation allows analysing and comparing different hydrostatic drive systems. In many constructed and manufactured machines currently used hydrostatic drive systems or electro hydrostatic systems of varying complexity. Today, the need for energy-efficient systems forces to some extent the development and improvement of computational methods using computer aided relating to energy efficiency systems. Hydrostatic systems especially in modern machines play a very important role. Actuators, such as hydraulic motors, hydraulic cylinders is commonly used for a long time, including on machines and equipment land and marine. Unawareness of proportions of the energy, volumetric, pressure and mechanical losses in elements is often the case. Problems connected with energy efficiency are essential for improvement of functionality and quality of hydrostatic drive systems, characterised by unquestioned advantages. Energy efficiency of hydrostatic transmissions, particularly those with throttling control of the motor speed, and also efficiency of the hydraulic servomechanism systems may be in fact higher than the values most often quoted in publications on the subject.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126545920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Computational investigations of active flow control on helicopter - rotor blades 直升机旋翼叶片主动流动控制的计算研究

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133905

W. Stalewski, J. Sznajder

{"title":"Computational investigations of active flow control on helicopter - rotor blades","authors":"W. Stalewski, J. Sznajder","doi":"10.5604/12314005.1133905","DOIUrl":"https://doi.org/10.5604/12314005.1133905","url":null,"abstract":"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.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124401436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

SPATIAL MODEL OF THE UNSPRUNG WHEELED MACHINE'S DYNAMIC SYSTEM 无弹簧轮式机械动力系统的空间模型

Journal of KONES. Powertrain and Transport Pub Date : 2014-05-23 DOI: 10.5604/12314005.1133864

S. Chwastek

{"title":"SPATIAL MODEL OF THE UNSPRUNG WHEELED MACHINE'S DYNAMIC SYSTEM","authors":"S. Chwastek","doi":"10.5604/12314005.1133864","DOIUrl":"https://doi.org/10.5604/12314005.1133864","url":null,"abstract":"Mobile heavy machines as unsprung vehicles exhibit low dissipation ability, hence the ride even at low speeds may give rise to intensive vertical and angular vibration. Vibrations thus produced are mostly in the low-frequency range and hence energy dissipation in tires will reduce the vibration intensity in a minor degree only. Particularly dangerous situations occur when the road wheels break away from the road surface due to the ’galloping’ effect. Kinematic excitation acting on the wheels is mostly uncorrelated stochastic (random) processes, giving rise to the \"snake meandering\" effect. That implies a major restriction on the ride velocity, which negatively affects the machine performance. The motion of tired wheels will always involve certain slipping. While investigating the feasibility of increasing the efficiency of the vibration reduction systems, one ought to take into account the variable adhesion of road wheels due to different dynamic loading acting on the vehicle axles during the ride. This study investigates the motion of unsprung mobile machines, taking into account the dynamic processes in the driving system under the conditions of the variable adhesion of road wheels. The model of interaction between a tired wheel and the terrain takes into account the relationship between the road wheel adhesion factor and the slipping action, as well as the impacts of the differential gear on distribution of drive torque. The 3D (spatial) model of a backhoe loader is considered. It is a two-axle self-propelled machine on a wheeled chassis. The mathematical model constitutes nonlinear and non-stationary differential equations of motion. Their stability is therefore associated with vibration intensity. Simulations in the time domain were supported by Matlab-Simulink. The purpose of this study is to improve the safety features during the ride of mobile heavy machines, basing on the parametric optimization of the model.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128046885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0