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Preliminary Desing and Optimization of a Power Gearbox for the Ultrafan TM Geared Engine

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Preliminary Desing and Optimization of a Power Gearbox for the Ultrafan TM Geared Engine

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dc.contributor.advisor Dr. Sethi es_ES
dc.contributor.advisor Dr. Pachidis es_ES
dc.contributor.author Valbuena Antón, Miguel Ángel es_ES
dc.date.accessioned 2016-03-08T11:10:51Z
dc.date.available 2016-03-08T11:10:51Z
dc.date.created 2015-12
dc.date.issued 2016-03-08
dc.identifier.uri http://hdl.handle.net/10251/61547
dc.description.abstract The need for a more efficient and environmentally-friendly aviation has led to the development of low-emission, low-noise engines. Increasing the bypass ratio is known to be an effective solution in order to reduce the specific fuel consumption. This has motivated the development of high-diameter fans. However the increasing difference between the fan and low-pressure turbine diameters poses a great challenge when finding an optimum rotational speed to suit both components. While an excessive rotational speed results in aerodynamic instabilities in the fan blades, a reduced rotational speed increases the required number of low-pressure turbine stages. The high bypass ratio geared turbofan permits to de-couple the fan and low-pressure turbine rotational speed. This allows the development of high bypass ratio engines while precluding the mentioned disadvantages. The main drawback of this technology is the additional weight associated with the gearbox and the heat exchanger required for cooling purposes. The mechanical losses and the often prohibitive dimensions of this arrangement are other of the challenges associated with this design solution. This work undertakes the preliminary design and optimisation of a power transmission gearbox to be used on a geared turbofan. For this purpose a computer-based tool has been developed in order to design the gearbox depending on the power conditions, the gear ratio and the lubricant properties. This approach permits to estimate the gearbox weight and total heat rejection. Performing a multi-objective optimisation to assess the trade-off between weight and efficiency, the most suitable gearbox configurations in terms of these two parameters are presented. The suitability of the designs is finally checked via a stress analysis. The method has been validated against existing gearboxes and the maximum discrepancies in terms of weight, power loss and stress limits do not exceed 10%.The method implemented is to be employed within the Advanced UltraFanTM Engines research activity, performed in Cranfield University Technology Centre (UTC) in performance engineering.. es_ES
dc.description.abstract Puedes encontrar el trabajo académico en la biblioteca de la ETSID (P E-PFC/10975) es_ES
dc.format.extent 235 es_ES
dc.language Inglés es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Double-helical es_ES
dc.subject Efficiency es_ES
dc.subject epicyclic es_ES
dc.subject Gearbox, es_ES
dc.subject Helical, es_ES
dc.subject Lubrication oil es_ES
dc.subject Mesh loss es_ES
dc.subject Pitch diameter es_ES
dc.subject Planet es_ES
dc.subject Ring es_ES
dc.subject Spur es_ES
dc.subject Stresses es_ES
dc.subject Sun es_ES
dc.subject Windage es_ES
dc.subject Weight es_ES
dc.subject.other Grado en Ingeniería Aeroespacial-Grau en Enginyeria Aeroespacial es_ES
dc.title Preliminary Desing and Optimization of a Power Gearbox for the Ultrafan TM Geared Engine es_ES
dc.type Proyecto/Trabajo fin de carrera/grado es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation Valbuena Antón, MÁ. (2015). Preliminary Desing and Optimization of a Power Gearbox for the Ultrafan TM Geared Engine. http://hdl.handle.net/10251/61547. es_ES
dc.description.accrualMethod Archivo delegado es_ES


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