Dissertations / Theses on the topic 'Rotary engine'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Rotary engine.'
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.
Dupont, Benoît. "Conception du compresseur supersonique du Rim Rotor Rotary Ramjet Engine." Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8823.
Full textBagheri, Amirhossein. "Preliminary Analysis of an Innovative Rotary Displacer Stirling Engine." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822801/.
Full textDRUMOND, CARLO CESAR. "NUMERICAL SIMULATION OF A ROTARY STIRLING ENGINE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30089@1.
Full textCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
O presente trabalho estuda um motor de deslocamento positivo Stirling rotativo. Dois modelos de simulação para este motor Stirling rotativo são desenvolvidos. O primeiro modelo utiliza o método isotérmico, mediante o qual a câmara de expansão/compressão do motor está à mesma temperatura do reservatório térmico com que troca calor. O segundo modelo utiliza o método de volumes de controle, no qual o motor é dividido em cinco volumes de controle: as câmaras de expansão e compressão, o aquecedor, o resfriador e o compartimento rotativo. Para cada volume de controle aplicam-se as equações de conservação de massa e energia e de equações de estado do gás. O sistema de equações diferenciais ordinárias resultantes do segundo modelo, é integrado, permitindo obter-se a variação no ângulo do eixo para todas as variáveis termodinâmicas do motor (pressão, temperatura, etc.). Dadas as condições de operação e a geometria do motor rotativo em estudo, os modelos preveem resultados globais e transientes ângulo a ângulo. Os resultados dos modelos são confrontados com resultados teóricos disponíveis na literatura.
The present work studies a positive displacement rotary Stirling engine. Two simulation models for this rotary Stirling engine are developed. The first model applies the isothermal method, in which the gas at the engine expansion / compression chamber has the same temperatures of the thermal reservoir. The second model uses the control volume method, in which the engine is divided into five control volumes: the expansion and compression chambers, the heater, the chiller and the rotary chamber. For each control volume the equations of conservation of mass and energy and the equation of state, are applied. The system of ordinary differential equations resulting from the second model is integrated allowing to obtain the variation in the axis angle for all thermodynamic variables of the motor (pressure, temperature, etc.). Given the operating conditions and geometry of the rotating motor under study, the models provide global and transient results from angle to angle. Results from two models are confronted with theoretical results available in the literature.
Picard, Mathieu. "Dynamique des gaz et combustion du Rim-Rotor Rotary Ramjet Engine (R4E)." Mémoire, Université de Sherbrooke, 2011. http://savoirs.usherbrooke.ca/handle/11143/1607.
Full textRancourt, David. "Analyse structurelle et validation expérimentale d'un Rim-Rotor Rotary Ramjet Engine (R4E)." Mémoire, Université de Sherbrooke, 2011. http://savoirs.usherbrooke.ca/handle/11143/1612.
Full textHudson, Barry, and not given. "The Production of Power by Pure Rotary Means." RMIT University. Architecture and Design, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090213.150107.
Full textStanten, Raymond Anthony. "Heat transfer and performance calculations in a rotary engine." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/101304.
Full textKaraca, Mehmet. "Overal Performance Prediction Of Turbo Rotary Compound (turc) Engine Using Simulation Results Of Engine Components." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606491/index.pdf.
Full textSILVA, FILIPE TEIXEIRA DE FREITAS E. "DEVELOPMENT AND EXPERIMENTAL EVALUATION OF A ROTARY INTERNAL COMBUSTION ENGINE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=34206@1.
Full textCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
No presente trabalho foi realizada a construção, montagem, revisão de projeto e avaliação experimental preliminar de um novo motor a combustão interna rotativo por ignição por centelha, que pode ser classificado como cat-and-mouse engine ou Twin-Rotor Piston Engine. Nesse motor, dois pares de deslocadores são montados sobre dois rotores, que giram em velocidade variável em dentro de uma câmara cilindrica, de forma a conferir uma variação da posição angular relativa entre deslocadores e, assim, formar quatro câmaras de volumes variáveis com o tempo, a fim de se realizar processos termodinâmicos equivalentes aos de um motor alternativo de quatro tempos. Esse motor destaca-se por possuir um sistema inovador que permite a mudança do movimento dos rotores e deslocadores, de forma a aumentar o volume deslocado e a taxa de compressão das câmaras onde ocorrem os processos termodinâmicos. Tal dispositivo permite alterar e otimizar a taxa de compressão para diferentes combustíveis. Os componentes do motor foram usinados de acordo com o projeto e o protótipo foi montado, revisado e ajustado, de forma a garantir a operacionalidade do equipamento. Posteriormente, o motor foi montado em uma bancada para se efetuar testes preliminares de acionamento externo, afim de se medir vazão volumétrica, potência fornecida e pressão de compressão no ponto morto superior em função da velocidade angular. A revisão bibliográfica do trabalho contém definições úteis na classificação de motores rotativos, além de discutir suas especificidades características.
The present work describes the construction, assembly, project revision and preliminary experimental evaluation of an innovative rotary spark ignition internal combustion engine. First, a literature survey was carried out. Some useful definitions were found for rotary engines classification as well as some of their specific characteristics were discussed. The engine can be classified as cat-andmouse engine or Twin-Rotor Piston Engine. It is characterized by two pairs of displacers, assembled over two rotors, which rotate at a variable rotational speed within a cylindrical cavity. The driving mechanism is such that the relative distance between each pair of displacers varies continuously, thus providing the positive displacement effect. Therefore, the engine has four chambers, each one with its own time varying volume, so that thermodynamic processes, equivalent to those of a four-stroke reciprocating internal combustion engine, can take place. This engine presents a unique and innovative mechanism by which the compression ratio can be varied during operation, thus optimizing engine efficiency a for a given fuel. Engine components, designed in an effort previous to the present one, were fabricated according to the original project. A prototype was assembled, with all components following a routine of project revision, including measurements, uncertainties and adjustments. The engine was then placed on a test bench where preliminary non-firing external driving tests were carried out. They included: volumetric flow rate, driving (frictional) power and cylinder maximum pressure with displacer at the top dead center, all these parameters in terms of the primary shaft angular velocity.
Tsakiroglou, G. B. "Performance modelling of a one-stroke rotary internal combustion engine." Thesis, University of Surrey, 1988. http://epubs.surrey.ac.uk/848135/.
Full textResor, Michael Irvin. "COMPUTATIONAL INVESTIGATION OF ROTARY ENGINE HOMOGENEOUS CHARGE COMPRESSION IGNITION FEASIBILITY." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1419010366.
Full textErcan, Taylan. "Thermodynamic And Structural Design And Analysis Of A Novel Turbo Rotary Engine." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606482/index.pdf.
Full textBenthara, Wadumesthrige Asela A. "Computational Investigation of Optimal Heavy Fuel Direct Injection Spark Ignition in Rotary Engine." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1313594631.
Full textNovotný, Petr. "Rotační motor pro motocykly." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318540.
Full textTessaro, Ioannes Paulus Bohn. "Caracterização da geometria e do funcionamento do conceito do motor rotativo de palhetas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/142841.
Full textThe concept of a rotary vane engine is presented and the model that operates similar to twostroke reciprocating engines is analyzed. This engine is formed by a cylindrical stator, decentralized rotor, radial vanes and side housing plates, similar to the radial vane compressors. Geometrical parameters are defined so that the motor has similar characteristics to two commercial reciprocating engines also modeled. Their geometries are detailed, as well as the thermodynamic model and its assumptions, which due to the comparative nature of the work do not have significant influence in achieving the objectives. With respect to reciprocating engines, the new concept is prospecting some advantages: higher compactness; lowest level of vibration; ease of adjustment of compression ratio; possibility of manufacture and assembly in modules; and due to all these, the numerous possibilities to the design, manufacture, assembly and operation of the engines. For a better understanding of some these advantages trends, the sensitivity of geometric parameters are studied, with variations in the diameters of the stator and rotor, in the thickness of the rotor and the vanes, in the eccentricity between rotor and stator, and in the number of vanes of the concept. This study demonstrates unique rotary vane engine characteristics, among them, the range of rotor thickness stands out for providing a change in engine size without changing other aspects. The eccentricity between the rotor and stator shows great potential for the ability to change the compression ratio of the equipment and can be modified even after the construction or even during operation of the engine. It also highlights the number of vanes, which has a direct influence on the torque curve of the cycle and the effectiveness of the positioning of inlet and exhaust ports. Therewith, the characterization of rotary vane engine geometry and operational design is complete, obtaining a good basis for its next development stages.
Zhao, Wenyu. "A Probabilistic Approach for Prognostics of Complex Rotary Machinery Systems." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1423581651.
Full textBehrens, Justin William. "Modification and Performance Evaluation of a Mono-valve Engine." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/638.
Full textShrestha, Amit. "Development and Performance Evaluation of a Mono-Valve Engine." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1879983291&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Full textBlažo, Marek. "Hnací ústrojí závodního Wankelova rotačního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229075.
Full textVotaw, Zachary Steven. "Computational Study on Micro-Pilot Flame Ignition Strategy for a Direct Injection Stratified Charge Rotary Engine." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1347895074.
Full textSlíva, Jakub. "Motocyklový rotační motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378137.
Full textAran, Gokhan. "Aerothermodynamic Analysis And Design Of A Rolling Piston Engine." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608449/index.pdf.
Full textNyawo, Talent. "Design of a rotary valve for pressurised steam." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192859.
Full textThis Master thesis is a project commissioned by the Swedish company Ranotor AB. The objective of this thesis is to develop a conceptual solution for a rotary valve mechanism that has to work efficiently in a high-temperature and high-pressure environment. The valve is to operate at high rotational speeds which calls for very short opening time.Modern engineering tools namely Solidworks, Ansys and Matlab, were employed for modelling and analysis of the conceptual solution.The best design solution was selected from three developed concepts, and the selected concept was further developed and optimized. Major material candidates and gas-tight sealing solution were identified and evaluated and the optimal material and seal design was chosen. Optimization of the individual components as well as the whole assembly was performed based on stress, thermal and dynamic analysis. The given design specifications and functions were fulfilled and the results were satisfactory. The obtained results provide a theoretical foundation for the development and application of a rotary valve in high-temperature and high-pressure environment.
Amirian, Hossein. "Design of a novel rotary compact power pack for the series hybrid electric vehicle : design and simulation of a compact power pack consisting of a novel rotary engine and outer rotor induction machine for the series hybrid electric vehicle powertrain." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/4446.
Full textDrbal, Milan. "Termodynamický model Wankelova motoru o výkonu 11 kW." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-355455.
Full textModa, Sunil Udaya Simha. "Computational Modeling and Analysis of Heavy Fuel Feasibility in Direct Injection Spark Ignition Engine." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1300120730.
Full textBöhm, Michael. "Návrh radiálních těsnicích lišt pro Wankelův motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400484.
Full textAlcalde, Murilo Priori. "Comparison of the mechanical properties of engine-driven nickel- titanium instruments manufactured by different thermal treatments." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/25/25147/tde-24012019-101418/.
Full textO objetivo deste estudo foi avaliar o comportamento mecânico de instrumentos mecanizados de Níquel-Titânio (NiTi) fabricados com diferentes tratamentos térmicos. Na primeira parte do estudo foram utilizados 60 instrumentos reciprocantes para a realização dos teste de fadiga cíclica flexural e torcional (n=20): Reciproc R25 (REC 25.08), Unicone L25 (UNC 25.06) e Prodesign R 25 (PDR 25.06). O teste de fadiga cíclica flexural foi realizado com o objetivo de mensurar o tempo para a fratura dos instrumentos em um canal artificial de aço inoxidável com curvatura com 60º de angulação e 5 mm de raio (n=10). Para o teste de torção, os 3 mm inicias das pontas dos instrumentos foram fixadas em um aparelho de torção (n=10), de acordo com a norma ISO 3630-1. Este teste foi realizado com o objetivo de mensurar o torque máximo e o ângulo de rotação suportado pelos instrumentos até sua fratura. Adicionalmente, todos os fragmentos dos instrumentos fraturados foram examinados em microscopia eletrônica de varredura (MEV) para avaliar as características topográficas da superfície da área da fratura. A análise-estatística foi realizada utilizando o teste de análise de variância com um fator ANOVA e teste de Tukey, o nível de significância foi de 5%. Os resultados de fadiga cíclica flexural demonstraram que o PDR 25.06 apresentou maior tempo para a fratura do que os outros grupos (P<0.05). O instrumento REC 25.08 apresentou maior resistência a fadiga cíclica flexural do que o UNC 25.06 (P<0.05). O teste de torção demonstrou que o PDR 25.06 apresentou significantemente menor resistência torcional do que o REC 25.08 e UNC 25.06 (P<0.05). Além disso, não houve diferença entre REC 25.08 e UNC 25.06. Com relação ao ângulo de rotação, o PDR 25.06 e UNC 25.06 apresentaram diferença significante quando comparado ao REC 25.08. Não houve diferença entre PDR 25.06 e UNC 25.06 (P>0.05). Todos os instrumentos apresentaram característica topográficas típicas de fadiga cíclica flexural e torcional. Na segunda parte deste estudo avaliou-se a fadiga cíclica flexural e torcional dos instrumentos reciprocantes Reciproc Blue R25 (RB 25.08), WaveOne Gold Primary (WOG 25.07) e Prodesign R 25 (PDR 25.06) (n=20). O teste de fadiga cíclica flexural foi realizado com dispositivo descrito anteriormente, utilizando curvaturas de 60º e 5 mm de raio (n=10). O teste de torção foi realizado de acordo com a norma ISO 3630-1 (n=10). Todos os fragmentos dos instrumentos fraturados foram examinados em microscopia eletrônica de varredura (MEV) para avaliar as características topográficas da superfície da área da fratura. A análise-estatística foi realizada utilizando o teste de análise de variância com um fator (ANOVA) e teste de Tukey, o nível de significância foi de 5%. Os resultados de fadiga cíclica flexural demonstraram que o PDR 25.06 apresentou a maior resistência a fadiga cíclica flexural do que dos outros grupos (P<0.05). O RB 25.08 apresentou maior tempo para à fratura do que o WOG 25.07 (P<0.05). O teste de torção, o PDR 25.06 apresentou a menor resistência à torção do que os outros grupos (P<0.05). Não houve diferença significante entre RB 25.08 e WOG 25.07 (P>0.05). Em relação ao ângulo de rotação, o PDR 25.06 apresentou maiores valores quando comparados com RB 25.08 e WOG 25.07. O RB 25.08 apresentou diferença significante quando comparado com WOG 25.07. Todos os instrumentos apresentaram características topográficas típicas de fadiga cíclica flexural e torcional. Na terceira parte deste estudo avaliou-se a resistência torcional de instrumentos empregados para patência do canal radicular, de acordo com a norma ISO 3630-1. Foram utilizados 56 instrumentos rotatórios (n=8): Logic 25.01 (LOG 25.01), Logic CM 25.01 (LOG CM 25.01), Proglider 16.02 (PGD 16.02), Hyflex GPF 15.01, 15.02, 20.02 (HGPF) e Mtwo 10.04. Os fragmentos dos instrumentos fraturados foram examinados em microscopia eletrônica de varredura (MEV) para avaliar as características topográficas da superfície da área da fratura. A análise-estatística foi realizada utilizando o teste de análise de variância com um fator ANOVA e teste de Tukey, o nível de significância foi de 5%. Os resultados demonstraram que o LOG 25.01 apresentou significantemente maior resistência torcional do que os demais grupos (P<0.05). O grupo da PGD 16.02 apresentou diferença significante quando comparado com HGPF 15.01 e 15.02 (P<0.05). O LOG CM 25.01 apresentou maior resistência torcional do que o grupo do HGPF 15.01 e 15.02 (P<0.05). Não houve diferença significante entre os intrumentos Mtwo 10.04 e HGPF 15.01, 15.02 e 20.02. Com relação ao ângulo de rotação, o LOG CM 25.01 e HGPF 15.01 apresentaram os maiores valores (P<0.05). O PGD 16.02 apresentou o menor valor de todos os grupos (P<0.05) seguido pelo Mtwo 10.04. O LOG 25.01 apresentou maiores ângulos de rotação do que o PGD 16.02 e Mtwo 10.04 (P<0.05). Todos os instrumentos apresentaram característica topográficas típicas de fadiga torcional. As características da secção transversal, tipo de núcleo, taper e o tratamento térmico possuem forte influência sobre as propriedades mecânicas dos instrumentos de NiTi. No entanto, o tratamento térmico é um dos fatores primordiais para maior flexibilidade dos instrumentos. O instrumento PDR 25.06 apresentou maior resistência à fadiga cíclica flexural e maior ângulo de rotação no teste de torção do que todos os outros instrumentos reciprocantes avaliados. No entanto, menor resistência torcional. Os intrumentos LOG 25.01 apresentaram maior resistência torcional e o LOG CM 25.01 maiores ângulos de rotação.
Andersson, Victor. "Flödesanalys av roterande ventil i ångmotor." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68099.
Full textDenna rapport är ett examensarbete på Karlstads Universitet i samband med Invencon AB och Ranotor AB. Målet var att analysera en roterande ventil som leder trycksatt vattenånga via ett inlopp och ut genom fem olika utlopp. De kvantifierbara resultaten som söktes var massflödet ut ur utloppen och krafterna som påverkar ventilen och axeln (främst radiellt). Verktyg som har använts för att analysera ventilen är PTC Creo och ANSA för modellering och mesh, samt ANSYS-CFX och Matlab för beräkningshjälp. Resultaten tyder på att det valda varvtalet, 4600 rpm, inte fungerar så bra. Varvtalet valdes pågrund av att man var intresserad av driftsfallet. Ett 3 mm radiellt avstånd mellan ventil ochventilhus visade sig även ge läckage i form av tryckfall inuti ventilen. Randvillkoren som är specificerade är inte giltiga vid detta driftsfall. Eftersom tryckförhållandet är så högt (100 till 1 bar) så är flödet chokat. Stor tryckskillnad gör det viktigt att anpassa arean på utloppen, då tryckfall påverkar densiteten. Krafterna på den roterande ventilen som beräknades (i ANSYS-CFX) är ett underlag vid val av lager för ventilen. Om konstruktionen modifieras, och/eller ventilen kommer att användas vid ett annat varvtal så kommer dessa krafter att ändras.
Krejčí, Tomáš. "Variabilní geometrie sacích a výfukových portů Wankelova motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229126.
Full textDogantimur, Erkan, and Daniel Johnsson. "Analysis of Accuracy for Engine and Gearbox Sensors." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388346.
Full textRosa, Danielle Cristina. "Análise comparativa ex vivo da quantidade de material extruído apicalmente por diferentes técnicas mecanizadas de instrumentação dos canais radiculares." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-19032010-105032/.
Full textEndodontic treatment is constituted of a sequence of stages that must be respected and performed with the same degree of importance in order to ensure the success of endodontic therapy. Special attention is paid to the stage of biomechanical preparation of the root canal, which may cause the extrusion of pulp remainders, necrotic tissue, dentin scrapings and auxiliary chemical substances through the apical foramen, causing an inflammatory reaction or flare-up. With the intention of achieving successful post-operative period, a study was conducted with the aim of making an ex vivo evaluation of the quantity of material extruded through the apical foramen during root canal preparation, by means of the following techniques: manual Step-Back, mechanized rotary Crown Down and Free Tip Preparation. Afterwards, the teeth were randomly assigned to three equal groups (n=15) according to post length, as follows: G1 manual Step-Back technique (control); G2 - Crown Down; G3 - Free Tip Preparation. All the groups were instrumented to 0.5 mm short of the apical foramen. The extruded was collected in an Extruded Material Collecting Device (EMCD), made specifically for this purpose, and apical extrusion was calculated by determining the mass of solid material extruded. The values obtained were analyzed by the Kruskal-Wallis test and complementary Dunns Multiple test, with P=0.05, as the level of statistical significance. The results showed that the Step-Back technique promoted the largest amount of material extruded through the apical foramen; and that there was no statistically significant difference between the Crown Down and Free Tip Preparations. It could also be concluded that there was extrusion of solid material through the apical foramen in all the studied instrumentation techniques used.
Bagheri, Amirhossein. "Characterization, Analysis, and Optimization of Rotary Displacer Stirling Engines." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1609074/.
Full textChoy, Jose. "Wankel engine dynamic supercharging and surface rotor cooling." Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497868.
Full textRomanov, Artyom. "Rocket Engine System Analysis : Vinci Engine Turbines Analysis, Volvo Aero Corp." Thesis, Linköping University, Linköping University, Linköping University, Applied Thermodynamics and Fluid Mechanics, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17766.
Full textMajor part of the current work describes the development of the update methodology for onedimensional code (TML) currently used at Volvo Aero Corporation during turbine design process. The methodology is then applied and tried out in a general engine analysis (GESTPAN).
Duran, Celio. "Modélisation du comportement dynamique non-linéaire et transitoire de turbomoteur avec multitouches rotor/stator." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0144.
Full textThis PhD thesis deals with the nonlinear transient dynamic response of rotor/stator assemblies in the case of multi-contacts, it is applied on Turbomeca’s helicopter turbo-engine. In order to improve gas turbine performances, constructors have to reduce rotor/stator clearances, while continuing to maintain component’s reliability, durability and safety. It implies the development of models to predict and control unsafe situations as, rotor/stator interactions between fixed and rotating parts, mainly triggered by a blade-loss in helicopters turbo-engine case. The first part of this document is concerned with a bibliographical summary of the main physical phenomena observed after a rotor/stator interaction, this is supported by experiments and numerical calculations. A review of the various sliding contact numerical models is presented. The duality between time and/or frequency simulation response methods as, harmonic balance method vs Newmark time integration scheme is discussed. Then two numerical tools for frequency domain analysis are described: the spectrogram to analyze frequency spectrum as a function of the time, the full-spectrum for analyzing the rotor whirl motions. The second part is focused on the time response simulation of some academic systems: an excited oscillator with two end-stops, a Jeffcott rotor and finally a 3 disks rotor both subjected to disk/casing interactions. Given the transient behavior exhibited by turbo-engine rotors following a rotor/stator contact, the purpose is to test several step-by-step time integration scheme combined with different contact laws. This analysis has shown that the Newmark scheme with constant acceleration used with damped contact penalty laws combined to stiffness and damping coefficients smoothed by arctangent functions are relevant. The rotor bending modeling during transient motion considering possible multi-contacts with the stator is realized using the finite element method and the previously reviewed contact modeling methods. The simulation is implemented under Matlab environment and is named ToRoS. (Rotor/Stator Touch). Finally, the developed modeling is applied to the Ardiden 1H turbo-engine. The ToRoS software is used to predict the transient dynamic response of the free power turbine subjected to multi-contacts, after a sudden blade-loss which is modeled by a sudden unbalance. Contact laws are applied and depend on contact type and location: disk/casing, seals, thrust bearing. Depending on the mass unbalance level, the speed of rotation, the contact and friction parameters, the rotor can be in a quasi-permanent contact state in forward whirl while the rotation speed is running-down
Mok, Keng Wa. "Design and control of an electromechanical variable rotary valve system for four-stroke engines." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1942819.
Full textBolger, John Jude. "Three dimensional design of compressor blades." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/251477.
Full textQuackenbush, John Charles. "Design, fabrication and test of a gas turbine engine and wave rotor test bed." Diss., Connect to online resource - MSU authorized users, 2008.
Find full textNeilson, Richard David. "Dynamics of simple rotor systems having motion dependent discontinuities." Thesis, University of Dundee, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362927.
Full textPicard, Mathieu. "Development of multiscale models for the performance of the gas and oil seals in rotary engines." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92169.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 341-344).
Rotary engines offer higher power density, fewer parts and lower vibrations than conventional reciprocating piston engines. However, rotary engines are more difficult to seal because of the rotor shape which leads to higher gas leakage and oil consumption resulting in lower efficiency and higher emissions. In order to address this problem, this thesis presents a set of multiscale models to assess rotary engine performances by estimating gas leakage, oil consumption, wear and friction. An oil seal multiscale model is developed to estimate internal oil consumption guided by oil transport visualization experiments carried using a laser-induced fluorescence technique. A finite element beam model is used to predict the clearance between the oil seals and the side housing for each crank angle in the cycle. From seal-housing clearance, oil transport through the oil seals is calculated using a control volume approach. The main mechanism leading to internal oil consumption is outward scraping of the oil seals due to a lack in conformability of the seals to the distorted side housing, especially next to the intake and exhaust ports. A set of multiscale models are developed for the performance of the apex and side seals. The models are formulated to couple gas flow to the dynamics and deformation of the seals while accurately describing the interfaces between the seals and their profile and groove. The models are used to predict apex and side seal behavior and understand the mechanisms leading to gas leakage. The main leakage mechanisms identified are leakage through (1) the corner seal clearance, (2) the spark plug holes, (3) the flanks of the seals at high speed, and (4) the side piece corner for the apex seals and at the ends of the side seals. The apex seal model shows good agreement with experiments, especially for the pressure in the apex seal groove. It is the first time such comprehensive models are developed for rotary engines and they will be valuable tools to help design more efficient and environment-friendly rotary engines.
by Mathieu Picard.
Ph. D.
Pollock, Brad. "COMPUTATIONAL STUDY OF DIRECT FUEL INJECTION IN THE ROTAX 914 ENGINE." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1292869654.
Full textGreen, T. "Effect of external flow on the sealing performance of rotor-stator rim seals." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358187.
Full textSuhr, Stephen Andrew. "Preliminary Turboshaft Engine Design Methodology for Rotorcraft Applications." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14128.
Full textRoberts, James W. "Further calculations of the performance of turbofan engines incorporating a wave rotor." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA240867.
Full textThesis Advisor(s): Shreeve, Raymond P. Second Reader: Hobson, Garth V. "September 1990." Description based on title screen as viewed on December 18, 2009. DTIC Descriptor(s): Rotors, Turbofan Engines, Waves, Gases, Pressure, Ratios, Computer Programs, Cycles. DTIC Identifier(s): Wave Rotors, Rotors, Waves, Theses. Author(s) subject terms: Turbofan Engines, Turbofan engines with a Wave Rotor. Includes bibliographical references (p. 95-96). Also available in print.
Materano, Blanco Gilberto Ignacio. "Numerical modelling of pressure rise combustion for reducing emissions of future civil aircraft." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9259.
Full textSureshkumar, Prathiban. "Near-field acoustic assessment of open rotor aero-engines." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/417854/.
Full textFrohnapfel, Dustin Joseph. "Experimental Investigation of Fan Rotor Response to Inlet Swirl Distortion." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71323.
Full textMaster of Science
Shahriar, Hassan. "Structural design of the rotor and static structure of a microscale Rankine engine." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66783.
Full textL'objectif de cette thèse est de développer des outils qui permettront la conception de composants de moteur, afin de satisfaire les exigences de performance et de fiabilité de l'appareil dans des conditions extrêmes. Le méthode Ashby a été utilisée pour identifier un ensemble de matériaux - la zircone, la silice, de l'alliage de titane, de l'alliage nickel-cobalt, de silicium et de carbure de silicium – pour la structure statique isolante du rotor, ce qui révèle un compromis entre la performance, la fiabilité et la fabricabilité . Ultérieurement, les contraintes, et les déformations de la structure statique d'isolation ont été analysées par la méthode des éléments finis.Par la suite, une expérience idéalisée d'impact a été conçue et réalisée pour évaluer la fiabilité du rotor dans le cas d'un accident d'impact à grande vitesse avec la paroi latérale de la structure statique. La vitesse seuil d'ouverture des dommages dans des projectiles d'alumine (balles) un impact sur les objectifs de l'alumine (disques) a été retrouvé à 30 m/s, alors que le projectile en zircone sur la cible d'alumine a été jugé dans la région de 65 - 70 m/s. Ces résultats ouvrent la voie à la formulation de matériaux de conception pour le rotor et la paroi latérale statique du micro-moteur Rankine.
Sykes, John Edward Hugh. "Investigation on non-linear phenomena in rotor-damper assemblies." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314725.
Full text