Recursos de colección

Archivo Digital UPM (106.784 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Aeronáutica

Mostrando recursos 1 - 20 de 1.050

  1. Theoretical study of the energy harvesting of a cantilever with attached prism under aeroelastic galloping

    Xu-Xu, Ji; Vicente-Ludlam, David; Barrero Gil, Antonio
    The aeroelastic galloping of a cantilever with attached prism has recently attracted the attention of several researchers as a way to harvest energy from an airstream. This arrangement is not entirely analogous to that of classical Transverse Galloping (TG) since the instantaneous attitude of the galloping body (prism) with respect to the incident flow depends both on the velocity of the galloping body and wind speed (like in TG) but also on the rotation angle at the cantilever free end. A new governing parameter emerges, namely the ratio of the cross-section length of the prism to the beam length ?,...

  2. Assessment of experimental optical techniques for characterizing heat transfer using numerical simulations

    López Juste, Gregorio; Fajardo, P.
    This manuscript addresses the application of numerical simulations for assessing the error in the measurement of the bulk temperature along the laser beam of a 3D flow using a 2D Moiré deflectometry analysis. To analyze the effect of different flow parameters on the error, a 3D computational model of an experimental system was developed. The simulated domain represents the well-known solution of the backward facing step in a rectangular channel but includes a hot-plate at the bottom of the step to enhance the heat transfer effects. The geometry resembles that found in a general heat exchanger. The difference between the...

  3. Medida del deterioro del hormigón sometido a hielo-deshielo con bandas extensométricas

    Romero, Hector; Casati Calzada, Maria Jesus; Galvez Ruiz, Jaime Carlos
    Los daños producidos por los ciclos de hielo deshielo en el hormigón llegan hasta un 13% del total de los daños. Estos daños pueden ser internos y externos, y se manifiestan en la disminución del módulo de elasticidad dinámico y la aparición de fisuras, y el descascarillamiento superficial, respectivamente. La mayoría de los ensayos normalizados para la evaluación de la resistencia del hormigón a los efectos del H-D se basan en la medida del daño externo. Estas medidas requieren parar el ensayo y manipular las probetas fuera de la cámara climática. En este trabajo se propone el uso de medidas...

  4. Docencia presencial y laboratorio remoto: una unión idónea para las prácticas de motores alternativos

    Tizón Pulido, Juan Manuel; Navarro Arevalo, Emilio
    Se ha utilizado en una misma clase presencial recursos docentes convencionales, como son la clase magistral y las presentaciones en pantalla, junto con un laboratorio remoto para impartir docencia de prácticas de laboratorio de Motores Alternativos de Combustión Interna. En ambos casos se ha hecho uso de cámaras de video para visualizar las instalaciones en tiempo real. La clase magistral se ha utilizado para describir las instalaciones que forman parte de un banco de ensayos y el laboratorio remoto se ha utilizado para realizar ensayos para la determinación de actuaciones de un motor de encendido provocado. Con esta metodología se...

  5. Aerodynamic shape optimization of a 3D wing via volumetric B-Splines

    Martín Burgos, Mario Jaime; Andrés Pérez, Esther; Gomez Lopez, Mariola
    This paper shows a gradient-based aerodynamic shape optimization of a threedimensional wing using volumetric B-Splines. The wing is enclosed in a volumetric parallelepiped, commonly referred as control box, which can be seen as a rubber box that deforms the enclosed space. The deformation of the wing is provided by the manipulation of the control points, where the gradients are calculated using the continuous adjoint solution. This technique can be applied to arbitrary three dimensional complex designs and provides some advantages over other traditional geometry parameterization methods, such as deformation locality and the ability to handle some geometric constraints.

  6. A singularity-free DROMO-based regularized method for the propagation of roto-translationally coupled asteroids

    Urrutxua Cereijo, Hodei; Pelaez Alvarez, Jesus
    There are many asteroids for which the attitude coupling imposes harsh demands to the numerical propagation of their dynamics. Special regularization methods are appropriate to overcome such difficulties, where perturbations techniques make their best. The perturbation techniques used to derive the DROMO regularization method for orbital dynamics, have now been extended to the attitude dynamics problem with equally remarkable results both in terms of speed and accuracy. The combination of these DROMO-based techniques is thus appropriate for the propagation of strongly coupled bodies.

  7. Mesh movement strategy based on octree decomposition

    Gómez López, Mariola; Cordero Gracia, Marta Amalia; Ponsin Roca, Jorge; Valero Sánchez, Eusebio
    The aim of the present work is to apply an interpolation method based on Radial Basis Functions(RBF) to transfer deformations from surface mesh to volume mesh in multidisciplinary CFD computations. In order to deal with the increasing need in all engineering areas to manipulate meshes of very large computational size, it is mandatory to develop methodologies based on the decomposition of the global problem into local smaller problems according to the current computational capabilities of personal computers. In this way we have applied an octree decomposition to generate computational domains where the interpolation can be easily affordable. The problem now...

  8. An interpolation tool for aeroelastic data transfer problems

    Cordero Gracia, Marta Amalia; Gomez Lopez, Mariola; Valero Sanchez, Eusebio
    In the loosely-coupled aeroelastic methodology, the aerodynamic and structural models are computed on different meshes. CFD tools are applied over the aerodynamic grid whereas CSM tools over the structural one. Depending on the model, the meshes can or not share an interface. In stick models, for example, there is no real interface. A common problem consists on transfering structural deformations to the aerodynamic mesh and aerodynamic loads to the structural one. In this work we have developed an interpolation tool based on Radial Basis Functions (RBF) to transfer information between loosely-coupled meshes, independent of their topologies. The problem arises when...

  9. Definición e integración de procedimientos de descenso continuo para la mitigación de ruido en la operación del TMA y del Aeropuerto de Madrid - Barajas

    Arnaldo Valdes, Rosa Maria; Gomez Comendador, Víctor Fernando; Perez Sanz, Luis
    Aplicación operativa de procedimientos de vuelo de aeronaves de mitigación de ruido, con minimización del impacto sobre la capacidad

  10. Investigación de accidentes RPAS

    Arnaldo Valdes, Rosa Maria
    Taller para la Comunidad Española de RPAS Grupo 6 - Aspectos de educación y genéricos de seguridad de la integración de los RPAS

  11. Estudio de la maquinabilidad de aleaciones de aluminio-cobre

    Sánchez Almirón, Borja; Aguirre Cebrian, Maria Vega; Calvo Narvaez, Felix; González Requena, Ignacio; Sanz Lobera, Alfredo
    El cometido principal es establecer una metodología para analizar y evaluar la maquinabilidad de una aleación aluminio-cobre mecanizada en torno utilizando los recursos disponibles en los laboratorios de materiales y producción. El estudio se realizó mediante la medida del caudal de viruta, el dimensionado de la herramienta durante el proceso y su análisis microscópico. También se estudió el posible desgaste de la herramienta y qué factores han podido incrementar o disminuir dicho valor. Se han mecanizado ocho barras de una aleación 2030 T4 con dos herramientas de corte idénticas de carburo de wolframio. Esto permite usar cada filo de corte...

  12. Plasma simulation in space propulsion : the helicon plasma thruster

    Navarro Cavallé, Jaume
    The Helicon Plasma Thruster (HPT) is an electrodynamic rocket proposed in the early 2000s. It matches an Helicon Plasma Source (HPS), which ionizes the neutral gas and heats up the plasma, with aMagneticNozzle (MN),where the plasma is supersonically accelerated resulting in thrust. Although the core of this thruster inherits the knowledge on Helicon Plasma sources, dated from the seventies, the HPT technology is still not developed and remains below TRL 4. A deep review of the HPT State-of-art has been performed, concluding that the propulsive figures reached for some prototypes abruptly differ from each other. This Thesis analyses some of...

  13. The atmospheric science of JEM-EUSO

    Rodríguez Frías, M.D.; Nerov, A.; Wada, S.; Adams, J.H.; Sánchez, J.L.; Sabau, M.D.; Licandro, J.; Franchini Longhi, Sebastian Nicolas; Wiencke, L.; Kudela, K.; Bobik, P.; Blecki, J.; Popescu, E.M.; Klimov, P.A.; Panasyuk, M.I.; Ebisuzaki, T.; López, L.; Ogawa, T.; Toscano, S.; Merino, A.; Sáez-Cano, G.; Mackovjak, S.; Meseguer Ruiz, José; Pérez Grande, María Isabel; Bozzo, E.; Soriano, J.F.; Prieto, H.; Morales de los Ríos, J.A.; Tomida, T.; Mustafa, M.; González, C.; Belenguer, T.; Sanz, M.; Joven, E.; Reyes, M.; Martín, Y.; Alonso Rodrigo, Gustavo; Roibás-Millán, Elena; Pindado Carrion, Santiago; Sanz Andres, Angel Pedro; Ramírez, L.; Echandía, C.; Pérez-Cano, S.; Maroto, O.; Díez Merino, L.; Tomás, A.; Carbonell, J.; Hoogerwerf, A.; Bayat, D.; Revol, V.; Krasnopolski, K.; Bursch, T.; Peral, L. del
    An Atmospheric Monitoring System (AMS) is critical suite of instruments for JEM-EUSO whose aim is to detect Ultra-High Energy Cosmic Rays (UHECR) and (EHECR) from Space. The AMS comprises an advanced space qualified infrared camera and a LIDAR with cross checks provided by a ground-based and airborne Global Light System Stations. Moreover the Slow Data Mode of JEM-EUSO has been proven crucial for the UV background analysis by comparing the UV and IR images. It will also contribute to the investigation of atmospheric effects seen in the data from the GLS or even to our understanding of Space Weather.

  14. The Spanish Infrared Camera onboard the EUSO-BALLOON (CNES) flight on August 24, 2014

    Rodríguez Frías, M.D.; Licandro, J.; Sabau, M.D.; Sánchez, J.L.; Franchini, Sebastian Nicolas; López, L.; Ramírez, L.; Joven, E.; Reyes, M.; González-Alvarado, C.; Belenguer, Tomás; Meseguer Ruiz, José; Perez Grande, María Isabel; Sáez Cano, G.; Soriano, J.F.; Carretero, J.H.; Prieto, H.; Morales de los Ríos, J.A.; Martín, Y.; Merino, A.; Sanz-Palomino, M.; García-Ortega, E.; Gascón, E.; Fernández-González, S.; Alonso Rodrigo, Gustavo; Roibás Millán, Elena; Sanz Andres, Angel Pedro; Pindado Carrion, Santiago; Maroto, O.; Díez Merino, L.; Tomás, A.; Carbonell, J.; Echeandía, C.; Pérez-Cano, S.; Peral, L. del
    The EUSO-Balloon (CNES) campaign was held during Summer 2014 with a launch on August 24. In the gondola, next to the Photo Detector Module (PDM), a completely isolated Infrared camera was allocated. Also, a helicopter which shooted flashers flew below the balloon. We have retrieved the Cloud Top Height (CTH) with the IR camera, and also the optical depth of the nonclear atmosphere have been inferred with two approaches: The first one is with the comparison of the brightness temperature of the cloud and the real temperature obtained after the pertinent corrections. The second one is by measuring the detected signal from the helicopter...

  15. Meteor studies in the framework of the JEM-EUSO program

    Abdellaoui, G.; Abe, S.; Acheli, A.; Jr., J.H. Adams; Ahmad, S.; Ahriche, A.; Albert, J.-N.; Allard, D.; Alonso, G.; Anchordoqui, L.; Andreev, V.; Anzalone, A.; Aouimeur, W.; Arai, Y.; Arsene, N.; Asano, K.; Attallah, R.; Attoui, H.; Pernas, M. Ave; Bacholle, S.; Bakiri, M.; Baragatti, P.; Barrillon, P.; Bartocci, S.; Batsch, T.; Bayer, J.; Bechini, R.; Belenguer, T.; Bellotti, R.; Belov, A.; Belov, K.; Benadda, B.; Benmessai, K.; Berlind, A.A.; Bertaina, M.; Biermann, P.L.; Biktemerova, S.; Bisconti, F.; Blanc, N.; Błȩcki, J.; Blin-Bondil, S.; Bobik, P.; Bogomilov, M.; Bonamente, M.; Boudaoud, R.; Bozzo, E.; Briggs, M.S.; Bruno, A.; Caballero, K.S.; Cafagna, F.; Campana, D.; Capdevielle, J.-N.; Capel, F.; Caramete, A.; Caramete, L.; Carlson, P.; Caruso, R.; Casolino, M.; Cassardo, C.; Castellina, A.; Castellini, G.; Catalano, C.; Catalano, O.; Cellino, A.; Chikawa, M.; Chiritoi, G.; Christl, M.J.; Connaughton, V.; Conti, L.; Cordero, G.; Crawford, H.J.; Cremonini, R.; Csorna, S.; Dagoret-Campagne, S.; Donato, C. De; de la Taille, C.; Santis, C. De; del Peral, L.; Martino, M. Di; Djemil, T.; Djenas, S.A.; Dulucq, F.; Dupieux, M.; Dutan, I.; Ebersoldt, A.; Ebisuzaki, T.; Engel, R.; Eser, J.; Fang, K.; Fenu, F.; Fernández-González, S.; Fernández-Soriano, J.; Ferrarese, S.; Finco, D.; Flamini, M.; Fornaro, C.; Fouka, M.; Franceschi, A.; Franchini, Sebastian Nicolás; Fuglesang, C.; Fujimoto, J.; Fukushima, M.; Galeotti, P.; García-Ortega, E.; Garipov, G.; Gascón, E.; Geary, J.; Gelmini, G.; Genci, J.; Giraudo, G.; Gonchar, M.; Alvarado, C. González; Gorodetzky, P.; Guarino, F.; Guehaz, R.; Guzmán, A.; Hachisu, Y.; Haiduc, M.; Harlov, B.; Haungs, A.; Carretero, J. Hernández; Hidber, W.; Higashide, K.; Ikeda, D.; Ikeda, H.; Inoue, N.; Inoue, S.; Isgrò, F.; Itow, Y.; Jammer, T.; Joven, E.; Judd, E.G.; Jung, A.; Jochum, J.; Kajino, F.; Kajino, T.; Kalli, S.; Kaneko, I.; Kang, D.; Kanouni, F.; Karadzhov, Y.; Karczmarczyk, J.; Karus, M.; Katahira, K.; Kawai, K.; Kawasaki, Y.; Kedadra, A.; Khales, H.; Khrenov, B.A.; Kim, Jeong-Sook; Kim, Soon-Wook; Kim, Sug-Whan; Kleifges, M.; Klimov, P.A.; Kolev, D.; Kreykenbohm, I.; Kudela, K.; Kurihara, Y.; Kusenko, A.; Kuznetsov, E.; Lacombe, M.; Lachaud, C.; Lahmar, H.; Lakhdari, F.; Larsson, O.; Lee, J.; Licandro, J.; Lim, H.; Campano, L. López; Maccarone, M.C.; Mackovjak, S.; Mahdi, M.; Maravilla, D.; Marcelli, L.; Marcos, J.L.; Marini, A.; Martens, K.; Martín, Y.; Martinez, O.; Masciantonio, G.; Mase, K.; Matev, R.; Matthews, J.N.; Mebarki, N.; Medina-Tanco, G.; Mehrad, L.; Mendoza, M.A.; Merino, A.; Mernik, T.; Meseguer Ruiz, José; Messaoud, S.; Micu, O.; Mimouni, J.; Miyamoto, H.; Miyazaki, Y.; Mizumoto, Y.; Modestino, G.; Monaco, A.; Monnier-Ragaigne, D.; de los Ríos, J.A. Morales; Moretto, C.; Morozenko, V.S.; Mot, B.; Murakami, T.; Nadji, B.; Nagano, M.; Nagata, M.; Nagataki, S.; Nakamura, T.; Napolitano, T.; Nardelli, A.; Naumov, D.; Nava, R.; Neronov, A.; Nomoto, K.; Nonaka, T.; Ogawa, T.; Ogio, S.; Ohmori, H.; Olinto, A.V.; Orleański, P.; Osteria, G.; Painter, W.; Panasyuk, M.I.; Panico, B.; Parizot, E.; Park, I.H.; Park, H.W.; Pastircak, B.; Patzak, T.; Paul, T.; Pennypacker, C.; Perdichizzi, M.; Pérez-Grande, María Isabel; Perfetto, F.; Peter, T.; Picozza, P.; Pierog, T.; Pindado Carrion, Santiago; Piotrowski, L.W.; Piraino, S.; Placidi, L.; Plebaniak, Z.; Pliego, S.; Pollini, A.; Popescu, E.M.; Prat, P.; Prévôt, G.; Prieto, H.; Putis, M.; Rabanal, J.; Radu, A.A.; Rahmani, M.; Reardon, P.; Reyes, M.; Rezazadeh, M.; Ricci, M.; Frías, M.D. Rodríguez; Ronga, F.; Roth, M.; Rothkaehl, H.; Roudil, G.; Rusinov, I.; Rybczyński, M.; Sabau, M.D.; Cano, G. Sáez; Sagawa, H.; Sahnoune, Z.; Saito, A.; Sakaki, N.; Sakata, M.; Salazar, H.; Sanchez, J.C.; Sánchez, J.L.; Santangelo, A.; Crúz, L. Santiago; Sanz Andres, Angel Pedro; Palomino, M. Sanz; Saprykin, O.; Sarazin, F.; Sato, H.; Sato, M.; Schanz, T.; Schieler, H.; Scotti, V.; Segreto, A.; Selmane, S.; Semikoz, D.; Serra, M.; Sharakin, S.; Shibata, T.; Shimizu, H.M.; Shinozaki, K.; Shirahama, T.; Siemieniec-Oziȩbło, G.; Sledd, J.; Słomińska, K.; Sobey, A.; Stan, I.; Sugiyama, T.; Supanitsky, D.; Suzuki, M.; Szabelska, B.; Szabelski, J.; Tahi, H.; Tajima, F.; Tajima, N.; Tajima, T.; Takahashi, Y.; Takami, H.; Takeda, M.; Takizawa, Y.; Talai, M.C.; Tenzer, C.; Tibolla, O.; Tkachev, L.; Tokuno, H.; Tomida, T.; Tone, N.; Toscano, S.; Traïche, M.; Tsenov, R.; Tsunesada, Y.; Tsuno, K.; Tymieniecka, T.; Uchihori, Y.; Unger, M.; Vaduvescu, O.; Valdés-Galicia, J.F.; Vallania, P.; Vankova, G.; Vigorito, C.; Villaseñor, L.; Vlcek, B.; von Ballmoos, P.; Vrabel, M.; Wada, S.; Watanabe, J.; Watanabe, S.; Jr., J. Watts; Weber, M.; Muñoz, R. Weigand; Weindl, A.; Weiler, T.J.; Wibig, T.; Wiencke, L.; Wille, M.; Wilms, J.; Włodarczyk, Z.; Yamamoto, T.; Yamamoto, Y.; Yang, J.; Yano, H.; Yashin, I.V.; Yonetoku, D.; Yoshida, S.; Young, R.; Zgura, I.S; Zotov, M.Yu.; Marchi, A. Zuccaro
    Abstract We summarize the state of the art of a program of {UV} observations from space of meteor phenomena, a secondary objective of the JEM-EUSO international collaboration. Our preliminary analysis indicates that JEM-EUSO, taking advantage of its large {FOV} and good sensitivity, should be able to detect meteors down to absolute magnitude close to 7. This means that JEM-EUSO should be able to record a statistically significant flux of meteors, including both sporadic ones, and events produced by different meteor streams. Being unaffected by adverse weather conditions, JEM-EUSO can also be a very important facility for the detection of bright...

  16. Supervivencia de una amarra espacial en órbita baja

    Negrete Solana, Juan José
    Electrodynamic tethers are a tool to deorbit dead satellites in LEO. These satellites can be shattered by an impact with space debris thereby increasing the amount of space debris and eventually triggering the Kessler cascade. In the LEO environment the tethers can be rendered inoperative by bombardment by space debris or micrometeoroids. In this report we study the survival probability of a tape-tether against multiple impacts with debris. In particular a FORTRAN program which computes the survival probability of a 5 km long, 2 cm wide and 0.05 mm thick tether orbiting at 800 km altitude during 3 months is presented....

  17. On some characteristics of the spatial distribution of turbulence components over the Bolund hill determined in wind tunnel compared to full-scale measurements

    Cuerva Tejero, Alvaro; Gallego Castillo, Cristobal Jose; Lopez Garcia, Oscar; Avila Sanchez, Sergio; Yeow, Tee Seong
    A comparison is presented between wind tunnel (WT) and full scale (FS) measurements of spatial distributions of turbulence intensities, IUi = aUiS~1, and their ratios; U4 being the fluctuations of velocity components and S the mean velocity magnitude, over the Bolund hill. The Bolund experiment, conducted by Ris0-DTU during a 3-month period in the winter of 2007-2008, is probably the most relevant test case of flow models oriented to wind energy analysis, in this case, over highly complex terrains, in neutral conditions and non affected by Coriolis forces. The Bolund hill is a small peninsula, with an almost vertical 11...

  18. POD on the fly: an adaptive combination of CFD and POD to simulate complex dynamics

    Vega De Prada, Jose Manuel; Rapun Banzo, Maria Luisa; Varas Merida, Fernando; Le Clainche Martínez, Soledad; Terragni, Filippo; Moreno, Ruben
    Reduced order models is a fashionable field that aims at dramatically reducing the computational cost of standard numerical solvers. Such reduction is possible when the number of physically relevant degrees of freedom is much smaller than the number of `numerical degrees of freedom'. POD on the fly combines  short runs of a standard numerical solver with a low-dimensional system, which is used for the majority of the simulation. The basic ideas of this strategy will be outlined and applications to various fields (including the complex Ginzburg?Landau equation, the unsteady lid?driven cavity, an aero?elastic system, and a subsurface oil?reservoir simulation) briefly reported

  19. Continuous climb operations: the following steps

    Pérez Castán, Javier Alberto; Gomez Comendador, Víctor Fernando; Arnaldo Valdes, Rosa Maria; Guevara Martínez, Sergio
    Typically air traffic controller manages departure traffic gradually in the airport airspace neighborhoods, providing clearances for the access to higher altitudes determined by conditions of traffic flow mix. This air traffic management implies the realization of several level-offs at each departure which suppose an increase of the fuel consumption firstly and as result the rise of overall cost of operation. Furthermore, not only operational costs are affected but both noise and pollutants emissions are increased, eco-friendly departure procedures requires a special heed because a new international range of equirements desire to abate the environmental impact due to aircraft operations. In order...

  20. Impact of the Unsteady Aerodynamics of Oscillating Airfoils on the Flutter Characteristics of Turbomachines

    Vega Coso, Almudena
    This thesis studies the unsteady aerodynamics of oscillating airfoils in the low reduced frequency regime, with special emphasis on its impact on the scaling of the work per cycle curves, using an asymptotic approach and numerical experiments. The unsteady aerodynamics associated with the vibration of turbine and compressor bladed-discs and stator vanes is nowadays routinely analysed within the design loop of the aeroengine companies, and it has also been the subject of dedicated experiments. The final aim is the derivation of the aerodynamic stability of rotor blades and the quantification of the aerodynamic damping, which is the result of the...

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