1,721,445 research outputs found
Progress in Gas Turbine Performance
Full text linkThere has been a remarkable difference in the research and development regarding gas turbine technology for transportation and power generation. The former remains substantially florid and unaltered with respect to the past as the superiority of air-breathing engines compared to other technologies is by far immense. On the other hand, the world of gas turbines (GTs) for power generation is indeed characterized by completely different scenarios in so far as new challenges are coming up in the latest energy trends, where both a reduction in the use of carbon-based fuels and the raising up of renewables are becoming more and more important factors. While being considered a key technology for base-load operations for many years, modern stationary gas turbines are in fact facing the challenge to balance electricity from variable renewables with that from flexible conventional power plants. The book intends in fact to provide an updated picture as well as a perspective view of some of the abovementioned issues that characterize GT technology in the two different applications: aircraft propulsion and stationary power generation. Therefore, the target audience for it involves design, analyst, materials and maintenance engineers. Also manufacturers, researchers and scientists will benefit from the timely and accurate information provided in this volume. The book is organized into three main sections including 10 chapters overall: (i) Gas Turbine and Component Performance, (ii) Gas Turbine Combustion and (iii) Fault Detection in Systems and Materials
Significance of Blade Element Theory in Performance Prediction of Marine Propellers
No full textThis paper illustrates the implementation of a combined momentum-bladeelementtheory for light and moderately loaded marinepropellers and highlights its relevance, when compared to other more complex procedures, for their design and analysis. For this purpose, the results obtained using the theoretical model are first validated against experimental data concerning four Wageningen B-series propellers, and then these results are compared to those found using a fully three-dimensional Navier–Stokes calculation. The reasons of the differences in the results are analyzed and discussed using theoretical arguments
Ottimizzazione Progettuale di Profili in Schiera per Pompa Assiale Mediante Algoritmi Genetici
No full textPropulsione Aerea
No full textQuesto testo illustra i fondamenti teorici per la comprensione dei principi di funzionamento dei sistemi propulsivi impiegati in ambito aeronautico e, come tale, è stato concepito per essere di guida agli studenti che frequentano i corsi di 'Propulsione Aerospaziale' del nuovo ordinamento del Corso di Laurea in Ingegneria Aerospaziale. Molta enfasi è stata data ai sistemi propulsivi basati sull'impiego delle turbine a gas (ossia i turboreattori, i turbofan e i turboelica) e ai loro componenti principali (compressori, espansori e camere di combustione). Tuttavia non si è tralasciato di trattare, in quanto tuttora assai diffusa, l'elica aerea, così come i propulsori più avanzati, utilizzati nel volo supersonico e ipersonico, quali il ramjet e lo scramjet. Ernesto Benini, ingegnere, dottore di ricerca, è docente di 'Sistemi Propulsivi' presso la Facoltà di Ingegneria dell'Università di Padova. Si occupa da tempo di ricerche nell'ambito dello sviluppo di algoritmi progettuali di ottimizzazione applicati alle macchine per la propulsione aerea, in particolare alle turbine a gas aeronautiche. È autore di numerose pubblicazioni scientifiche su tale argomento, per lo più su riviste internazionali
Design of Centrifugal Compressor Impellers for Maximum Pressure Ratio and Maximum Efficiency
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