Hot isostatic pressing (HIPing) has been a growing material treatment process for performance part manufacturingfor over 50 years. This process of using an inert gas at high temperature and pressure to densifymaterials leads to vastly improved material properties by removing pores and other micro- aws. Interest forHIP treatment has greatly increased in recent years due to the development of metal 3D printing technology.HIP treatment is very well suited for treating 3D printed and cast parts due to their relatively poor materialproperties.An important part of any HIP cycle is the cooling phase. New uniform and rapid cooling technology hasvastly reduced HIP cycle times, but room for further improvement exists. This study aims to accurately andtrustfully evaluate the performance of one of a pair of centrifugal pumps used in a Quintus Technologies ABHIP cooling system. Computational uid dynamics (CFD) software and techniques are used to achieve this.This paper is split into two main parts; the rst of which is a validation case study, and the second is theperformance analysis of a Quintus HIP cold gas pump. The validation case study is conducted to supportthe accuracy and reliability of results obtained in the Quintus cold gas pump performance analysis.The validation case study results show good agreement with experimental data and supports the accuracy ofCFD in the analysis of centrifugal pumps. Both detailed ow and macro ow characteristics are shown to beaccurately predicted. The pump curve generated for the Quintus Cold gas pump quanties its performanceover a range of rotational speeds and mass ow rates. The work done here lays the groundwork for furtheranalysis and improvement of Quintus HIP cooling systems.

Heart failure is expected to ail over 8 million people in America by 2030 leaving many in need of cardiac replacement. To accommodate this large volume of people, ventricular assist devices (VADs) are necessary to provide mechanical circulatory support. Current VADs exhibit issues such as thrombosis and hemolysis caused by large local pressure drops and turbulent flow within the pump. Multiple disk centrifugal pumps (MDCPs) use shearing and centrifugal forces to produce laminar flow patterns and eliminate large pressure drops within the pump which greatly reduce risks that are in current VADs. The MDCP has a shaft drive system (SDS) that causes leakage between the motor and housing that when implanted can cause blood loss, infection, thrombosis and hemolysis. To eliminate these adverse effects, a magnetic external motor-driven system (MEMDS) was implemented. An efficiency study was performed to examine the efficacy of the MEMDS by comparing the hydraulic work of the MDCP to the power required to run the pump. This was done by measuring inlet and outlet pressures, outlet flow rate and input current at various input voltages and resistances. The results showed the MDCP could produce physiologic flow characteristics with a flow rate of 4.90 L/min and outlet pressure of 61.33 mmHg at an impeller speed of 989.79 rpm. Other VADs generate flow rates around 5 L/min at rotational speeds of 2400 rpm for centrifugal pumps and 12000 rpm for axial pumps. When compared to the SDS, the MEMDS exhibited similar efficiencies of 3.89% and 3.50% respectively. This study shows promise in the advancement of MDCP.

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Esta dissertaÃÃo implementa uma planta de uma unidade de bombeamento suprida por eletricidade a partir da energia eÃlica, para viabilizar a extraÃÃo da Ãgua de poÃos. Instalada na EstaÃÃo de Engenharia de Pesca no Campus do Pici situado na Universidade Federal do Cearà (UFC), em Fortaleza - CE, Brasil. A unidade dispÃe de um aerogerador (1 kW-220 Vca), um controlador de carga, um sistema de bombeamento de Ãgua a partir de poÃo atà um reservatÃrio elevado. A energia elÃtrica para o acionamento do sistema de bombeamento pode ser fornecida pelo tanto pelo aerogerador quanto atravÃs da rede elÃtrica convencional. Outro aspecto enriquecedor do trabalho foi o desenvolvimento de uma tubulaÃÃo configurÃvel em que à possÃvel submeter à bomba a diversas cargas hidrÃulicas, para fins de realizaÃÃo dos testes operacionais. A planta desenvolvida foi capaz de bombear, em mÃdia, 4.318 L/dia de Ãgua com o valor mÃximo 10.698 L/dia a uma velocidade de vento mÃdia de 3,84 m/s. Os rendimentos mÃdios alcanÃados foram 10% (eÃlico/hidrÃulico) e 41% (elÃtrico /hidrÃulico) para uma velocidade de 6,5 m/s. Os ensaios realizados demonstraram baixa robustez do aerogerador utilizado, comprometendo, dessa forma, a disponibilidade operacional e a confiabilidade do equipamento. SÃo sugeridos aÃÃes para garantir a viabilidade da unidade usada no bombeamento de Ãgua acionada por aerogerador de pequeno porte.

Orientadores: Cecília Amélia de Carvalho Zavaglia, Aron José Pazin de Andrade / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-22T16:21:16Z (GMT). No. of bitstreams: 1 Silva_Cibeleda_M.pdf: 8042828 bytes, checksum: f69ba730298b110aecb701c7d8d19cf6 (MD5) Previous issue date: 2013 / Resumo: Neste trabalho foram elaborados os métodos e realizados estudos In Vivo e Avaliação Clínica de uma Bomba de Sangue para Circulação Extracorpórea (CEC), durante Cirurgia Cardíaca, denominada Spiral Pump® (SP). Esses estudos foram realizados com o objetivo de avaliar o desempenho e segurança da bomba, finalizando assim o projeto e avaliando a SP como um produto em sua aplicação rotineira durante as cirurgias cardíacas. A SP utiliza, simultaneamente, dois princípios de bombeamento, o centrífugo e o axial, proporcionados por sua geometria cônica, visando aumentar a eficiência de bombeamento sem o aumento dos índices de destruição dos elementos figurados do sangue. O primeiro passo para avaliação In Vivo foi à elaboração de um protocolo para avaliação In Vivo animal e sua submissão a Comissão de Ética para Uso de Animais (CEUA) do Instituto Dante Pazzanese de Cardiologia (IDPC). As avaliações In Vivo consistiram em instalação normal da CEC, em animais suínos, utilizando a SP conectada a um módulo de acionamento e, para fins de comparação, foi realizado o mesmo procedimento com a Bio-Pump®. Foram realizados seis experimentos com a SP, sendo o primeiro considerado piloto, e três experimentos com a Bio-Pump®, com duração de seis horas cada. As observações realizadas pela equipe médica e pela perfusionista demonstraram grande semelhança de funcionamento entre as duas bombas, inclusive em relação a vibrações, ruídos e facilidade de utilização. As bombas foram comparadas em relação à medição do trauma, analisado a partir da evolução da hemoglobina livre no plasma (PFH). Analisando os resultados laboratoriais e de hemólise obtidos com a SP e a Bio-Pump®, pode-se verificar que não existem diferenças significativas entre elas. Com resultados satisfatórios nos ensaios In Vivo, a SP foi aprovada para Avaliação Clínica, realizada de acordo com a legislação vigente. Foi elaborado um Protocolo de Pesquisa Clínica que seguiu a Resolução ANVISA número 39 de 05 de junho de 2008, que estabelece requisitos para realização de pesquisa clínica no Brasil. Esse protocolo foi submetido ao Comitê de Ética em Pesquisa (CEP) do IDPC e ao Conselho Nacional de Ética em Pesquisa (CONEP). A pesquisa clínica foi realizada no Centro Cirúrgico do IDPC em um grupo de quarenta pacientes com indicação de cirurgia cardíaca com CEC, com ou sem cardioplegia, ambos os sexos, adultos, peso corporal mínimo de 50 kg. Durante a CEC, a SP substituiu as convencionais bombas de roletes no circuito de CEC. Todos os pacientes foram entrevistados e autorizaram a realização do estudo, assinando do Termo de Consentimento Livre e Esclarecido. Foram coletados dados comumente monitorados durante uma cirurgia cardíaca e foram realizados, nos períodos de pré e pós CEC, exames de Desidrogenase Láctica (U/L), Plaquetas (mil/mm3), Fibrinogênio (mg/dL), além de monitoração da hemólise através de fita de urianálise. Os procedimentos transcorreram de forma habitual, e os parâmetros mantiveram-se dentro do esperado para o estudo, demonstrando a eficiência e segurança da SP como bomba para circulação extracorpórea durante cirurgia cardíaca / Abstract: Were developed methods and studies In Vivo and clinical evaluation were conducted with a blood pump for cardiopulmonary bypass (CPB), during cardiac surgery, the Spiral Pump® (SP). These studies are designed to assess the performance and safety of SP, finalizing the project and evaluating the SP as a product in its routine application during heart surgeries. The SP uses simultaneously, two principles of pumping, axial and centrifugal, provided by its conical geometry, in order to increase pumping efficiency without increased levels of destruction of the figured elements from blood. First step for In Vivo evaluation was the development of a protocol for In Vivo experiments and its submission to the "Ethic Committee for Animal Use" of Institute Dante Pazzanese of Cardiology (IDPC). The In Vivo assessments consisted of normal installation of the CPB in pigs, using the SP connected to a driver console and, for comparison purposes, the same procedure was performed with Bio-Pump®. Six experiments were performed with SP and three experiments with Bio-Pump®, lasting six hours each. Observations made by medical team showed great similarity between two pumps, including characteristics of vibration and noise. Two pumps were compared concerning to measurement of trauma, through the evolution of plasma free hemoglobin (PFH) and the PFH variation (?PFH). Analyzing laboratory results and hemolysis, from In Vivo assays with SP and the Bio-Pump®, we can observe no significant differences between them. With satisfactory results from In Vivo assays, SP was approved for clinical evaluation, carried out in accordance with current legislation. A Clinical Research Protocol was elaborated following ANVISA (National Health Surveillance Agency) resolution number 39 of 2008, which establishes requirements for conducting clinical research in Brazil. This Protocol was submitted to the Ethic Committee Research of IDPC for review and subsequently to National Council of Ethics in Research. Clinical research was conducted at operating room of IDPC in a group of forty patients under cardiac surgery with CPB, both sexes, adults, minimum of 50 kg of body weight. During CPB, SP replaced conventional CPB roller pump. All patients were interviewed and had authorized this study, signing of consent form. Usually monitored data were collected during a heart surgery and additional examinations were carried out at periods of pre and post CEC such as: Lactic dehydrogenase exams (U/L), platelets (1000/mm3), Fibrinogen (mg/dL), as well as monitoring of hemolysis by urianalysis tape. All procedures were as usual way, and all parameters remained as expected for this study, demonstrating the performance and safety of SP as pump for CPB during heart surgery / Mestrado / Materiais e Processos de Fabricação / Mestra em Engenharia Mecânica

The aim of the diploma thesis is to design the pump impeller. The classical design of the impeller is made for one operating point, in which pump is assumed to operate most of the time. The aim of this diploma thesis is to design a pump, whose pump cover and pump drive discs are designed for each other operating point and then compare the results of both design methods.

This diploma thesis deals with problematics of the radial force effect on the runner and possibilities of the force reduction. Some pump modifications were proposed and changes of radial force magnitude in reverse blocking state and optimal flow state were examined in consequence. Following investigation was focused on the new modifications regarding to the pump efficiency and its characteristics stability. All results were carried out using the Solidworks, the Fluent and the Microsoft Excel software.

Šio darbo tikslas – suprojektuoti ir išanalizuoti skysčio lygio valdymo sistemas su PI reguliatoriumi bei neraiškiosios logikos reguliatoriumi, atlikti imitacijas ir palyginti gautus rezultatus. Teorinėje dalyje apžvelgiamos skysčio lygio valdymo sistemos, jų pagrindiniai elementai. Taip pat išnagrinėjami sistemų valdymo ypatumai, naudojant neraiškiosios logikos ir PI reguliatorius. Tiriamojoje dalyje sudaryta: sistemos funkcinė schema, sistemos matematinis ir kompiuterinis modeliai. Atlikus procesų imitaciją nustatyta, kad sistemoje su PI reguliatoriumi pakeitus nuostatą dėl perreguliavimo gaunamos nepageidaujamos slėgio aukščio ir debito vertės. To išvengiama, naudojant neraiškiosios logikos reguliatorių. Darbo pabaigoje pateikiamos išvados. Darbą sudaro 7 dalys: įvadas, literatūros apie skysčio lygio valdymo sistemas analizė, tyrimo tikslas ir uždaviniai, teorinė dalis, tiriamoji dalis, išvados, literatūra. Darbo apimtis - 71 puslapiai be grafinės dalies, 53 iliustracijos, 6 lentelės, 40 bibliografinių šaltinių ir 4 internetinės prieigos. / The main goal of the thesis is to design and analyze liquid level control systems with a PI controller and a fuzzy logic controller, perform simulations and to compare the results. In the analytical part, liquid level control systems and main elements of liquid level control systems are overviewed. Also system control using PI and Fuzzy logic regulators is overviewed. In research part liquid level control system is projected practically. The research chapter consists of a functional scheme, mathematical and computer models design. The simulation of the system shows that changing the step size in the system with a PI controller results in unwanted total head and flow rate values because of an overshoot. This is avoided in the system with a fuzzy controller. At the end of the thesis there is a conclusions part. The work consists of seven parts: introduction, analysis of liquid level control system literature, main goal of the research, theory part, design part, conclusions, references. Work volume – 71 pages of text without appendixes, 53 illustrations, 6 tables, 40 bibliographical and 4 internet entries.

Orientador: Janito Vaqueiro Ferreira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-26T00:41:26Z (GMT). No. of bitstreams: 1 Foresti_BernardoPereira_M.pdf: 7267999 bytes, checksum: 1a200bffc0e39d2a529a64080b7ddad0 (MD5) Previous issue date: 2014 / Resumo: Neste trabalho buscou-se desenvolver uma metodologia que se valendo de dados de vibração estrutural de carcaça e da operação de uma bomba do bombeio centrífugo submerso (BCS) fosse capaz de identificar parâmetros da operação deste tipo de máquina, tais como: vazão mássica de líquido e gás, diferença de pressão, eficiência e potência mecânica. Para isso foram adaptados os seguintes métodos de diagnóstico de falhas: Método Baseado na Densidade Espectral de Potência, Método Baseado na Função Resposta em Frequência, Método Baseado na Medida de Coerência, Métodos Baseados nos Parâmetros do Modelo (Geométrico e Não-geométrico), Métodos Baseados nos Resíduos do Modelo (Baseado na Variância e Auto-covariância dos Resíduos) e Método Baseado em Modelos Funcionais. Tais métodos requerem a organização de um banco de dados, na fase de levantamento de referências utilizado para comparação com dados obtidos na fase de inspeção, visando à detecção, identificação e estimação da magnitude das falhas e defeitos, conceitos adaptados para o problema apresentado neste trabalho. A metodologia foi aplicada a dois casos: o primeiro, numérico, baseado em dados obtidos da simulação de um sistema de três graus de liberdade foi utilizado para operacionalização da metodologia e antecipação de problemas e dificuldades em sua aplicação. O segundo, experimental, principal foco deste trabalho, baseado em uma bomba utilizada no bombeio centrífugo submerso. Para aplicação da metodologia ao caso experimental, foi elaborado experimento utilizando uma bomba do BCS de quatro estágios instrumentada operando com escoamento bifásico ar-água em diferentes proporções. Resultados indicaram bom desempenho na detecção do tipo de escoamento (monofásico/bifásico), na identificação da vazão mássica de gás escoado e na estimação da vazão de líquido transportado pelo BCS / Abstract: In this research a method using structural vibration and operational data of a pump module normally used with and electrical submersible pump (ESP) has been developed to identify operational parameters, such as: liquid and gas flow rate, differential pressure, efficiency and shaft power. To this end, the following time-series fault detection and identification (FDI) methods were adapted: Power Spectral Density-based Method, Frequency Response Function-based Method, Coherence Measure-based Method, Parameter-based Method (Geometric and Non-geometric), Residual-based Methods (Residual Variance and Residual Uncorrelatedness) and Functional Model-based Method. For FDI, the methods require the set-up of a data base, in the baseline phase used for comparison with data obtained during inspection. The methodology was applied for two cases: A numerical problem based on a three degrees of freedom system, aiming at making functional the programs used and anticipating problematic issues and experimental data from a real ESP pump module, main focus of this work. The experiment consists of measuring structural vibration, and operational data of an ESP pump while varying liquid and gas flow rates keeping shaft speed and suction pressure constant. Results have indicated successful detection of flow type (monophasic/biphasic), identification of the gas flow and estimation of the liquid flow pumped by the ESP pump / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

The master thesis is focused on the examination of the influence of the impeller eye on the stability of Q-Y curves. It is the examination of the impact of a large inlet angle of the blade and the extension of the inlet part, which also supports good cavitation capabilities. Another consideration is the influence of the rotating fluid before the impeller, influence of the circumferential component of the absolute velocity at the inlet part. The proposed modification will be subject to simulation in ANSYS.

Hydraulic design of a hydrodynamic machine is designed to achieve a high value of energy transformation efficiency. Pumps and turbines have some different typical features in hydraulic design. With the aid of computational fluid dynamics, adjustments of the hydraulic parts of a standard centrifugal pump are assessed with the aim to increase hydraulic efficiency of the pump running as turbine. The impeller, volute casing and added draft tube are discussed.