Zobrazeno 1 - 10
of 189
pro vyhledávání: '"629.134"'
Autor:
Achard, Timothée
L'optimisation multidisciplinaire (MDO) à base de gradients est efficace et très utilisée pour le dimensionnement structural d'ailes flexibles. Cependant, dans le contexte de simulations numériques haute-fidélité, le calcul efficace des gradien
Externí odkaz:
http://www.theses.fr/2017CNAM1140/document
Autor:
Molokanov, Aleksej
The gear components in the aero-engine transmission system are subjected to very high stresses during service at elevated temperatures. Due to requirements of increasing power take-off and weight reduction further improvements in the high-strength ge
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725416
Autor:
Bertola, Luca
The engine size of modern aircraft is principally determined by take-off conditions, since initial acceleration requires the maximum engine power. An Electromagnetic Launch (EML) system could provide some or all of the energy required during the take
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.724847
Autor:
Alroqi, Abdurrhman Atig
In aircraft, the main landing gear wheels skid on the runway at the moment of touchdown because of high slip. A slipping tyre generates enough heat to melt its rubber. Melted rubber is easily eroded by the friction force between the tyre and runway;
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.714844
Autor:
Noor Mohamed, Sulfickerali
In this thesis, improved and faster CFD based aero-thermo-mechanical methods that can be used to optimize engine configurations early in the design process are described. Axisymmetric models of 3D non-axisymmetric features such as protrusions, holes
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707328
Autor:
Wilson, Robin
Linear friction welding (LFW) is a solid-state welding process (i.e. the melting temperature of the material is not reached) that is used for the fabrication of titanium alloy bladed discs (Blisks) in the fan and compressor stage of modern aero engin
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707611
Autor:
Azolibe, Ifeanyi
The aircraft fuel control system makes sure an engine has the precise amount of fuel required to generate power and thrust for every stage of flight. It therefore plays a role in determining the economics of flight. In order to maintain the economic
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.726665
Autor:
Jones, Gareth
This thesis combines experimental and computational methods to investigate the low Reynolds number flow (Re = 50,000) around a NACA 4415 aerofoil, and its control using periodic surface motion. A physical model was fabricated and tested in a closed-l
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.724138
Autor:
Navaratne, Rukshan
The continuous growth in flight operations has led to public concern regarding the impact of aviation on the environment with its anthropogenic contribution to global warming. Several solutions have been proposed in order to reduce the environmental
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720967
Autor:
Rodriguez Garcia, Paul
Appraisal of the noise produced at the combustion stage in a jet engine is becoming more important, as fan and jet noise have been significantly reduced over many years. Therefore, combustion noise is contributing more to overall noise, especially at
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722900