Log in

Relevant bibliographies by topics / Cylinder Power / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Cylinder Power.

Dissertations / Theses on the topic 'Cylinder Power'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 45 dissertations / theses for your research on the topic 'Cylinder Power.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Retzler, Chris-Heinz. "Dynamics of a long flexible horizontal circular cylinder in water waves." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/11302.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

PILLUTLA, JAYANTHI. "LAMINAR NON-NEWTONIAN FLOWS IN ECCENTRIC ANNULI WITH INNER CYLINDER ROTATION." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin998070950.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Tracy, Ian Patrick. "Enhanced engine mechanical efficiency through tailoring of lubricant formulations to localized power cylinder wall conditions." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98583.

Full text

Abstract:

Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2015.<br>Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 74-75).<br>Numerical and experimental studies were performed on an internal combustion engine power

APA, Harvard, Vancouver, ISO, and other styles

4

Molewyk, Mark Allen. "In situ control of lubricant properties for reduction of power cylinder friction through thermal barrier coating." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92191.

Full text

Abstract:

Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 61-62).<br>Lowering lubricant viscosity to reduce friction generally carries a side effect of increased metal-metal contact in mixed or boundary lubrication, for example near top ring reversal along the engine cylinder liner. A strategy to reduce viscosity without increased metal-metal contact involves controlling the local viscosity away from top-ring-reversal locations. This paper discusses the implementation o

APA, Harvard, Vancouver, ISO, and other styles

5

Lyu, Fei, Junhui Zhang, and Bing Xu. "Wear prediction of piston/cylinder pair in axial piston pump." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71106.

Full text

Abstract:

The piston/cylinder pair is the key lubricating interface of axial piston pumps. It suffers from excessive wear due to the huge lateral force, especially under high output pressure. In order to achieve predictive maintenance, it is significant to detect the performance degradation of the piston/cylinder pair. In this paper, a method to predict the wear of the piston/cylinder pair is proposed. The wear regions and corresponding wear depths under different conditions are investigated. The distributive characteristic parameters of the oil film are obtained, which can reflect the load-bearing and

APA, Harvard, Vancouver, ISO, and other styles

6

Venkataraman, Varun. "The Miller Cycle on Single-Cylinder and Serial Configurations of a Heavy-Duty Engine." Thesis, KTH, Förbränningsmotorteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-225833.

Full text

Abstract:

I jämförelse med sina föregångare, har moderna lastbilsmotorer genomgått en betydandeutveckling och har utvecklats till effektiva kraftmaskiner med låga utsläpp genom införandet avavancerade avgasbehandlingssystem. Trots att de framsteg som gjorts under utvecklingen av lastbilsmotorer har varit betydande, så framhäver de framtida förväntningarna vad gällerprestanda, bränsleförbrukning och emissioner behovet av snabba samt storskaliga förbättringar av dessa parametrar för att förbränningsmotorn ska fortsätta att vara konkurrenskraftig och hållbar. Utmaningen i att uppfylla dessa till synes enkl

APA, Harvard, Vancouver, ISO, and other styles

7

Ketelsen, Søren, Giacomo Kolks, Torben Ole Andersen, Lasse Schmidt, and Jürgen Weber. "Bootstrap reservoir concepts for electro-hydraulic compact cylinder drives." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71233.

Full text

Abstract:

This paper presents a conceptual study aiming to improve the compactness of electro-hydraulic compact drives (ECD ). In most current ECD architectures, gas accumulators are used as volume compensators for the flow imbalance emerging whenever asymmetric single rod cylinders are used. To stay within a required reservoir pressure range typically from two to four bar, a large gas volume is required, compromising system compactness. Combining conventional ECD architectures with a bootstrap reservoir offers a greater degree of freedom in system design, which enables downsizing or avoidance of the ga

APA, Harvard, Vancouver, ISO, and other styles

8

Minav, Tatiana, Jani Heikkinen, Soumadipta Pyne, Sami Haikio, Juha Nykanen, and Matti Pietola. "Analysis of novel zonal two-cylinder actuation system for heavy loads." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71078.

Full text

Abstract:

Climate change and economic opportunities motivate investigating electric distributed power for working hydraulics in non-road mobile machinery (NRMM) instead of conventional hydraulics. This recent method allows significant energy savings in hydraulic systems, which was demonstrated previously by many independent studies. In this study, zonal hydraulics (as electrically distributed) are realized with direct driven hydraulics drive (DDH) units. Unlike conventional hydraulic drives the DDH units are disconnected from the engine (main prime mover) and distributed throughout the system. In a DDH

APA, Harvard, Vancouver, ISO, and other styles

9

Przesmitzki, Steve (Steve Victor). "Characterization of oil transport in the power cylinder of internal combustion engines during steady state and transient operation." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44799.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references (p. 209-214).<br>Engine friction, wear, and oil consumption are some of the primary interests for the automotive industry. However, there is currently a lack of understanding of the fundamentals involving oil transport inside the power cylinder. Therefore, improving one area of engine performance, such as friction, may lead to decreased performance in another area, such as oil consumption. This work seeks to address some fundamental aspects of oil transport in t

APA, Harvard, Vancouver, ISO, and other styles

10

Jones, Cameron Bennion. "Development and Validation of a Vibration-Based Sound Power Measurement Method." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/9260.

Full text

Abstract:

The International Organization for Standardization (ISO) provides no vibration-based sound power measurement standard that provides Precision (Grade 1) results. Current standards that provide Precision (Grade 1) results require known acoustic environments or complex setups. This thesis details the Vibration Based Radiation Mode (VBRM) method as one approach that could potentially be used to develop a Precision (Grade 1) standard. The VBRM method uses measured surface velocities of a structure and combines them with the radiation resistance matrix to calculate sound power. In this thesis the VB

APA, Harvard, Vancouver, ISO, and other styles

11

Westerfield, Zach. "A study of the friction of the power cylinder system in internal combustion engines using a floating liner engine." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100347.

Full text

Abstract:

Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 117-120).<br>The recent worldwide quest to increase the fuel efficiency of internal combustion engines has led to great effects to reduce friction of many of the components in these engines. One area of major concern pertaining to this area is the friction of the piston/ring pack assembly. Because of the importance and necessity of this component to the internal combustion engine, any improvements can have relati

APA, Harvard, Vancouver, ISO, and other styles

12

Ward-Santos, Orlando. "Design and analysis of a turbocharged single cylinder diesel engine intake system for increased power output and transient response." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112526.

Full text

Abstract:

Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 35).<br>Small displacement, single-cylinder diesel engines have many applications in developing countries such as small-powered agricultural equipment, water pumps, and other power sources. Research has shown that the power of a turbocharged single-cylinder engine can match that of a larger displacement multi-cylinder, naturally aspirated engine, at a fraction of the cost. The valve timing mismatch that occurs whe

APA, Harvard, Vancouver, ISO, and other styles

13

Grønkær, Nikolaj, Lasse Nørby Nielsen, Frederik Ødum Nielsen, Søren Ketelsen, and Lasse Schmidt. "Multi-objective control of a self-locking compact electro-hydraulic cylinder drive." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71094.

Full text

Abstract:

The field of self-contained linear hydraulic drives based on variable-speed electrical motors and fixed displacement pumps is gaining interest from both industry and academia. Some of the main reasons for this is the possibility to improve the energy efficiency of such drives compared to conventional valve controlled drives, and the possibility for electrical regeneration allowing power sharing between multiple drives [1]. The main drawback for such types of drive concepts is a low pressure in the nonload carrying cylinder chamber. This induces a low drive stiffness limiting the achievable dri

APA, Harvard, Vancouver, ISO, and other styles

14

Geffroy, Stefan, Niklas Bauer, Tobias Mielke, et al. "Optimization of the tribological contact of valve plate and cylinder block within axial piston machines." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71109.

Full text

Abstract:

In this paper, a simulation study is carried out for the development of concepts to optimize the tribological contact of valve plate and cylinder block in an axial piston machine in swash plate design. The valve plate/cylinder block contact is one of the three essential tribological contacts in axial piston machines. In a research project at the Institute for Fluid Power Drives and Systems (ifas), this contact is investigated by a specifically designed simulation tool. In addition, a test rig exists for the experimental investigation. With the results of simulation and experiment, it was shown

APA, Harvard, Vancouver, ISO, and other styles

15

Liu, Liang 1971. "Modeling the performance of the piston ring-pack with consideration of non-axisymmetric characteristics of the power cylinder system in internal combustion engines." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30336.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 139-143).<br>The performance of the piston ring-pack is directly associated with the friction, oil consumption, wear, and blow-by in internal combustion engines. Because of non-axisymmetric characteristics of the power cylinder system, the performance of a ring varies along its circumference. Investigating these variations is of great interest for developing advanced ring-packs, but is out of the capabilities of the existing two-dimensional models. In this w

APA, Harvard, Vancouver, ISO, and other styles

16

Gravråkmo, Halvar. "Buoy Geometry, Size and Hydrodynamics for Power Take Off Device for Point Absorber Linear Wave Energy Converter." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-220344.

Full text

Abstract:

Wave energy converters of point absorber type have been developed and constructed. Full scale experiments have been carried out at sea and electricity has been successfully delivered. Linear permanent magnet generators together with a subsea substation and buoys of various geometric shapes have been investigated theoretically and experimentally. The design has in large extent an electronic approach, keeping the mechanical part of it as simple as possible, due to the long life span and reliability of electric components. Because of the nature of a linear generator, the internal translator with

APA, Harvard, Vancouver, ISO, and other styles

17

Siwulski, Tomasz, Urszula Warzynska, Marcin Rys, and Maciej Skrzypczak. "Experimental tests of fluid exchange process improvement in a new design of hydraulic cylinder with a supply system." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71090.

Full text

Abstract:

The article presents the results of experimental tests of the liquid exchange level in a new design of a hydraulic cylinder in comparison with the classic one. Comparative results are presented, as well as the influence of the stroke range on the degree of liquid exchange. The results allow the empirical determination of the degree of real improvement of the process of liquid exchange in the cylinder during operation, and thus allow the initial determination of the reliability level increase in hydraulic cylinders. It should be emphasized that the presented results are a part of a research and

APA, Harvard, Vancouver, ISO, and other styles

18

Davis, Jonathan Michael. "Diesel Engine Experimental Design and Advanced Analysis Techniques." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313526640.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Celý, Martin. "Zvýšení účinnosti spalovacího motoru pro malé autonomní prostředky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444982.

Full text

Abstract:

The work deals with the analysis of various possibilities of increasing the efficiency of a small internal combustion engine potentially usable for use in the field of autonomous devices of smaller dimensions. It contains an outline of the problems of modern smaller autonomous means and an analysis of available drives designed for them, especially an analysis of propulsion by internal combustion engines. In his next part of the work he provides information about the created mathematical model of the demonstration internal combustion engine in the GT-Power program and an analysis of places wher

APA, Harvard, Vancouver, ISO, and other styles

20

Dominguez, Bermudez Favio Enrique. "Simulation numérique de parcs d'hydroliennes à axe vertical carénées par une approche de type cylindre actif." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI020.

Full text

Abstract:

La récupération, grâce aux hydroliennes, de l’énergie cinétique de courants marins et fluviaux constitue une source d’énergie renouvelable considérable et prédictible. La simulation fine, par une description statistique instationnaire de type URANS, de l’écoulement autour d’une hydrolienne isolée à axe vertical, bi-rotor et munie d’un carénage (hydrolienne de type HARVEST) donne accès à une estimation précise de la puissance produite. Cependant, le coût élevé de cette approche URANS la rend inadaptée à la simulation d’un parc de machines. Une analyse de la littérature conduit à retenir un modè

APA, Harvard, Vancouver, ISO, and other styles

21

Daepp, Hannes Gorkin. "Development of a multi-platform simulation for a pneumatically-actuated quadruped robot." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45927.

Full text

Abstract:

Successful development of mechatronic systems requires a combination of targeted hardware and software design. The compact rescue robot (CRR), a quadruped pneumatically-actuated walking robot that seeks to use the benefits garnered from pneumatic power, is a prime example of such a system. This thesis discusses the development and testing of a simulation that will aid in further design and development of the CRR by enabling users to examine the impacts of pneumatic actuation on a walking robot. However, development of an entirely new dynamic simulation specific to the system is not practical.

APA, Harvard, Vancouver, ISO, and other styles

22

Votava, Michal. "Hydraulické posunovače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254345.

Full text

Abstract:

This diploma thesis deals with the design of the hydraulic puller. Furthermore, the diploma thesis presents the analysis of possible design solutions. It includes processing the selected design of the hydraulic puller with parameters: maximum pushing force 50 kN, speed of work movement 0,05 m.s-1. The analysis by using finite element method (FEM) is made. The next part of thesis includes the design of hydraulic circuit of puller. In the last part of thesis there is the design for replacement of hydraulic puller by mechanical systems.

APA, Harvard, Vancouver, ISO, and other styles

23

Mukherjee, Swarnava, Lizhi Shang, and Andrea Vacca. "A fast approach for coupled fluid-thermal modeling of the lubricating interfaces of axial piston machines." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71103.

Full text

Abstract:

The temperature distribution of the lubricating interfaces is an important aspect of the functioning of positive displacement machines. It can determine the efficiency and the life time of the unit. In particular, it directly affects the fluid properties and the thermal induced deformations of the solid bodies. A simulation tool capable of predicting the fluid temperature in such gaps thus becomes very useful in the design process of these machines. The temperature distribution in a film comprises of many physical phenomena including convection and conduction along and across the film. Past nu

APA, Harvard, Vancouver, ISO, and other styles

24

Budík, Tomáš. "Zakružovačka na Hardox." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231242.

Full text

Abstract:

This work describes the design of a dedicated three-rolls hydraulic bending for Hardox 500 without the possibility of bending sheet metal for the manufacture of pipes. The work will analyze the problem of proposed three-rolls bending, bending technology and creating of the pre-bending, the design of the adjusting hydraulic servo-cylinder, planetary gearboxes with hydraulic motors to drive the bottom rollers, a partial draft of the hydraulic circuit and the complete frame structure of bending machine with its covers.

APA, Harvard, Vancouver, ISO, and other styles

25

Pavelka, Roman. "Hydraulické posunovače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229740.

Full text

Abstract:

This diploma thesis deals with the mechanical proposal of hydraulic puller. Furthermore, it includes the detail design solutions. The project also includes the calculation of the hydraulic puller parameters: maximum pushing force is 60 kN, speed of movement is 0.1 m s-1. This work also contains of stress analysis FEM with I-DEAS software. Following part deals with the design of hydraulic circuit for driving puller. At the end of work there are options for replacements of hydraulic puller by mechanical systems.

APA, Harvard, Vancouver, ISO, and other styles

26

Kvasnica, Tomáš. "Hydraulické posunovače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228403.

Full text

Abstract:

This Diploma thesis occupies with design of hydraulic puller. In work are mentioned possible types of construction. Choice construction of puller is disposed with parameters: maximum pushing force 50 kN, speed of piston rod 0,05 m/s. This work also contains FEM analysis by computer programme I-DEAS. The work also occupies with design of fluid drive.

APA, Harvard, Vancouver, ISO, and other styles

27

Rao, Zhibiao. "The flow of power in the vortex-induced vibration of flexible cylinders." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100141.

Full text

Abstract:

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 255-259).<br>In this thesis techniques are developed which permit the identification of power-in and power-out regions of long cylinders exposed to flow-induced vibration. The data used to illustrate the techniques come from a set of vortex-induced vibration model tests conducted by Shell Oil Co in 2011 at the Marintek facility in Trondheim, Norway. The identification of power-in regions allows one to address t

APA, Harvard, Vancouver, ISO, and other styles

28

Чередник, І. П. "Проект вантажного автомобіля з дослідженням технологічного процесу відновлення головного гальмівного циліндру". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/25429.

Full text

Abstract:

Чередник, І. П. Проект вантажного автомобіля з дослідженням технологічного процесу відновлення головного гальмівного циліндру : випускна кваліфікаційна робота : 274 "Автомобільний транспорт" / І. П. Чередник ; керівник роботи В. М. Скляр ; НУ "Чернігівська політехніка", кафедра автомобільного транспорту та галузевого машинобудування. – Чернігів, 2021. – 138 с.<br>Робота охоплює в собі комплексний розрахунок параметрів автомобіля УРАЛ-4320, його параметрів, навантажень, потіжності двигуна, предавальних чисел коробки перемикання передач, визначення навантажень на двигун при рівномірному русі та

APA, Harvard, Vancouver, ISO, and other styles

29

Xia, Lianpeng, Long Quan, Lei Ge, Yunxiao Hao, Bin Zhao, and Bin Li. "Research on efficient driving method of heavy hydraulic excavator boom." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71117.

Full text

Abstract:

There is a lot of gravitational potential energy waste when hydraulic excavators work, which seriously affects the efficiency of the whole machine and produces a large amount of emissions. In order to reduce the energy consumption and emissions of large hydraulic excavators which the boom is driven by two hydraulic cylinders, an integrated drive and potential energy recuperation principle is proposed. In the implementation, the original two-chamber hydraulic cylinders are replaced by three-chamber hydraulic cylinders with energy storage chambers, and the energy storage chambers are directly co

APA, Harvard, Vancouver, ISO, and other styles

30

Guzzomi, Andrew Louis. "Torsional vibration of powertrains : an investigation of some common assumptions." University of Western Australia. School of Mechanical Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0032.

Full text

Abstract:

The area of powertrain dynamics has received considerable attention over a number of years. The recent introduction of more stringent emission requirements together with economic pressure has led to a particular focus on increasing powertrain efficiency. This has seen the incorporation of on-board, real-time measurements to predict system behaviour and engine condition. In this domain, accurate models for all powertrain components are important. One strategy to improve accuracy is to evaluate the assumptions made when deriving each model and then to address the simplifications that may introdu

APA, Harvard, Vancouver, ISO, and other styles

31

Чмуж, Я. В. "Обгрунтування параметрів низькообертових високомоментних гідромоторів створених на базі циліндрів". Thesis, Укр. держ. ун-т залізничного транспорту, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75126.

Full text

Abstract:

Вирішено важливе науково-практичне завдання: обгрунтування параметрів низькообертових високомоментних гідромоторів на базі циліндрів. Робочі процеси механізмів БКВРМ потребують реалізації обертового руху робочого обладнання з низькою частотою, від 0–1 об/хв. і більше. Застосування стандартних моторів потребує додатково використовувати редуктори, а в деяких випадках і гальмівні пристрої. Застосування в механізмах машин таких гідромоторів є неефективним рішенням, що підтверджується низьким рівнем ККД таких механізмів. Аналіз НВГ серійного виробництва виявив також складність реалізації низької ча

APA, Harvard, Vancouver, ISO, and other styles

32

Hobbs, William Bradford. "Piezoelectric energy harvesting: vortex induced vibrations in plants, soap films, and arrays of cylinders." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33811.

Full text

Abstract:

The goal of this project was to develop a wind generator that utilizes the collective oscillating motion of multiple piezoelectric devices. These devices would be an alternative to rotating turbine designs for low power generation, for use in applications such as remote power generation. A series of inexpensive devices were developed that harvested energy from vortex shedding, both as independent and cooperative devices. The behavior of single devices was studied, but more interestingly, the way that multiple devices arranged together can increase power output was studied. It was shown that i

APA, Harvard, Vancouver, ISO, and other styles

33

Brynjell-Rahkola, Mattias. "Studies on instability and optimal forcing of incompressible flows." Doctoral thesis, KTH, Stabilitet, Transition, Kontroll, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218172.

Full text

Abstract:

This thesis considers the hydrodynamic instability and optimal forcing of a number of incompressible flow cases. In the first part, the instabilities of three problems that are of great interest in energy and aerospace applications are studied, namely a Blasius boundary layer subject to localized wall-suction, a Falkner–Skan–Cooke boundary layer with a localized surface roughness, and a pair of helical vortices. The two boundary layer flows are studied through spectral element simulations and eigenvalue computations, which enable their long-term behavior as well as the mechanisms causing trans

APA, Harvard, Vancouver, ISO, and other styles

34

Ameur, Omar. "Commande et stabilité des systèmes commutés : Application Fluid Power." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0032/document.

Full text

Abstract:

Ces travaux portent sur la commande et l’analyse de la stabilité d’un système électropneumatique constitué d’un axe linéaire commandé par deux servodistributeurs régulant le débit massique entrant dans chaque chambre de l’actionneur. La problématique générale est motivée par l’apparition d’un phénomène de redécollage sur ce système électropneumatique difficilement pris en compte par les études actuelles en automatique. Ce problème, rencontré depuis de nombreuses années, concerne toutes les commandes linéaires et non linéaires mono et multidimensionnelles étudiées au laboratoire. Il se traduit

APA, Harvard, Vancouver, ISO, and other styles

35

Abry, Frédéric. "Contribution à la commande et l'observation des actionneurs électropneumatiques : de l'intérêt de la transformée A-T." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-01011297.

Full text

Abstract:

La commande des actionneurs électropneumatiques a été un sujet largement traité au cours des dernières décennies. Le caractère fortement non-linéaire de son comportement en a fait un cas d'étude particulièrement pertinent dans le cadre d'une démarche d'application de la théorie de la commande des systèmes non-linéaires. L'utilisation de ces techniques a été comparée aux approches linéaires traditionnelles et généralement jugée largement supérieure notamment en termes de précision ou de temps de réponse. Dans ce manuscrit nous abordons très spécifiquement l'aspect multivariable du système et in

APA, Harvard, Vancouver, ISO, and other styles

36

Fasquelle, Thomas. "Modélisation et caractérisation expérimentale d’une boucle solaire cylindro-parabolique intégrant un stockage de type thermocline." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0040/document.

Full text

Abstract:

Comme les autres technologies liées aux énergies renouvelables, le solaire à concentration souffre des problèmes liés à l’intermittence de la ressource. La technologie thermocline est une solution prometteuse qui réduirait le coût du stockage thermique dans les centrales solaires de ce type. Cependant, aucune étude n’a jusqu’ici porté sur l’impact de la variation de la température en sortie du réservoir de stockage de type thermocline sur les autres composants de la centrale. Ce travail de thèse a pour but d’améliorer les connaissances sur ce sujet, grâce à l’utilisation d’une mini boucle sola

APA, Harvard, Vancouver, ISO, and other styles

37

Bouvier, Jean-Louis. "Étude expérimentale d'une installation de micro-cogénération solaire couplant un concentrateur cylindro-parabolique et un moteur à cycle de Hirn." Thesis, La Rochelle, 2014. http://www.theses.fr/2014LAROS031/document.

Full text

Abstract:

L’objectif de cette thèse est d’étudier expérimentalement les performances énergétiques d'une installation de micro-cogénération solaire. Le prototype réalisé est constitué d'un concentrateur cylindro-parabolique associé à un moteur à vapeur fonctionnant suivant un cycle de Hirn (Rankine avec surchauffe). Les originalités de ce projet sont l’utilisation de l’énergie solaire, renouvelable et inépuisable mais intermittente, la génération directe de vapeur au sein d'un concentrateur de taille réduite (46,5 m²), le système de suivi solaire sur deux axes et le couplage à un moteur à piston non lubr

APA, Harvard, Vancouver, ISO, and other styles

38

Singh, Sanjeet Kumar. "Three Dimensional Flow of Power Law Fluids Over a Circular Cylinder." Thesis, 2016. http://ethesis.nitrkl.ac.in/9280/1/2016_MT_SKSingh.pdf.

Full text

Abstract:

External flow across a circular cylinder has been investigated numerically by solving continuity and momentum equations using FLUENT (version 15) in the two and three dimensional steady and unsteady cross flow regime. The influence of the Reynolds number (0.01≤Re≤300), powerlaw index (n=0.4, 1.4, 0.6.0.8, 1, 1.8) on the local and global flow characteristics has been studied. In addition, flow patterns showing streamlines and the vorticity magnitude on the surface of the cylinder have also been presented to provide further physical insights in to the detailed flow kinematics. At first the 2D st

APA, Harvard, Vancouver, ISO, and other styles

39

Kumar, Ashis. "Power-Law Fluid Flow Around A Triangular Cylinder in Laminar Flow Regime." Thesis, 2016. http://ethesis.nitrkl.ac.in/8288/1/2016_BT_112CH0079_Power-Law_.pdf.

Full text

Abstract:

Fluid flow past triangular cylinder in 2D has been scrutinized numerically by solving continuity equations and momentum equations in ANSYS FLUENT (version 15), in steady laminar flow regime. The effect of the Reynolds number (10=Re=40), in case of Power-law fluid, on the local and global flow characteristics has been investigated. In addition, flow orientations showing streamlines, recirculation length and the pressure variation on the surface of the cylinder have also been observed in order to provide further physical capacity to gain an accurate and deep understanding of the detailed flow ki

APA, Harvard, Vancouver, ISO, and other styles

40

Tirthankar, Sidhartha. "Power-Law Fluid Flow Around an Elliptical Cylinder in Laminar Flow Regime." Thesis, 2016. http://ethesis.nitrkl.ac.in/8311/1/2016_BT_112CH0101_Power-Law_Fluid_Flow_Around_an_Elliptical_.pdf.

Full text

Abstract:

Extensive research has been done on external flow of fluids over variously shaped bodies as is evident from the extensive literature available for circular cylinder and spheres, for instance. However, much of the literature has focused only on Newtonian fluid flow, leaving non-Newtonian fluid behavior out of the picture. In daily life we encounter non-Newtonian fluids like slurries, foams, emulsions etc. Also, much of the research has focused on circular cylinders, keeping elliptical cylinder data scant. Hence, the objective of this project is to emphasize on the flow pattern of Non-Newtonian

APA, Harvard, Vancouver, ISO, and other styles

41

Tung, Hung Jui, and 洪瑞桐. "The Study of Power and Torque of a 270 cc Single-Cylinder Engine with Electronic Gasoline Injection System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/11314421134429935463.

Full text

Abstract:

碩士<br>大葉大學<br>機械工程研究所碩士在職專班<br>93<br>In this study, using a 8051 microprocessor to make an ECU with an electronic fuel injection, we use a HONDA GX-270 gasoline engine. The carburetor system was replaced with a fuel injection system. A special purpose ECU was made to control the injection duration based on the engine’s rotational speed, and throttle angle in order to improve and increase the horsepower and torsion of the engine. Given the fast development of the electronics industry the cost of single chips have reduced in recent years with increasing chip stability. The microprocessor used in

APA, Harvard, Vancouver, ISO, and other styles

42

"The Effect of a Splitter Plate on the Flow around a Surface-Mounted Finite Circular Cylinder." Thesis, 2011. http://hdl.handle.net/10388/ETD-2011-09-171.

Full text

Abstract:

Splitter plates are passive flow control devices for reducing drag and suppressing vortex shedding from bluff bodies. Most studies of splitter plates involve the flow around an “infinite” circular cylinder, however, in the present study the flow around a surface-mounted finite-height circular cylinder, with a wake-mounted splitter plate, was studied experimentally in a low-speed wind tunnel using a force balance and single-component hot-wire anemometry. Four circular cylinders of aspect ratios AR = 9, 7, 5 and 3 were tested for a Reynolds number range of Re = 1.9×10^4 to 8.2×10^4. The splitt

APA, Harvard, Vancouver, ISO, and other styles

43

Tripp, David William. "Modelling power transfer in electron beam heating of cylinders." Thesis, 1994. http://hdl.handle.net/2429/8846.

Full text

Abstract:

The electron beam remelting process is used extensively for the refining and recycling of titanium and its alloys. The success of the process relies on its ability to provide a thermal environment capable of removing impurities and deleterious particles while allowing control of chemical composition and solidification. These aspects of the process hinge on the accurate control of power input to the melt stock. Over the years, the effects of various parameters (such as chamber pressure) on the power delivery to the melt stock have largely been ignored. In this work, a series of laborator

APA, Harvard, Vancouver, ISO, and other styles

44

Alberti, L. T. "Flow around cylindrical towers : the stabalising role of vertical ribs /." 2006. http://hdl.handle.net/10019/490.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Ho, Yuan Hong, and 何元宏. "The quenching of cylinders with heating power in deionized water and sea water." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/31665853741922265376.

Full text

Abstract:

碩士<br>國立清華大學<br>工程與系統科學系<br>103<br>Film boiling is usually induced while a very hot object contacts with a coolant. Such phenomena will deteriorate the heat transfer and degrade the cooling process. Film boiling is of significant concern for the design of an emergency core cooling system after a hypothetical loss of coolant accident happens in a nuclear power plant. Furthermore, after a nuclear power plant is shut down, the fuel rods will continue to release the heat due to decay of fission products. Moreover, the subcooling of coolant might be changed dramatically during the reflood process.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!