Browsing Aerospace, Mechanical & Electronic Engineering ITC by Title

Now showing items 12-31 of 36

    • A game assessment metric for the online gamer 

      Denieffe, David; Carrig, Brian; Marshall, Damien; Picovici, Dorel (Faculty of Electrical Engineering and Computer Science - Stefan cel Mare University of Suceava, Romania, 2007)
      This paper describes a new game assessment metric for the online gamer. The metric is based on a mathematical model currently used for network planning assessment. Beside the traditional network-based parameters such as ...

    • High order mismatch shaping for low oversampling rates. 

      O'Brien, Vincent; Mullane, Brendan (IEEE, 2019-03-11)
      Delta Sigma data converters employing high order dynamic element matching (DEM) allow for accurate signal conversion in the presence of DAC mismatch. However, at low oversampling rates, current high order DEM decoders ...

    • The impact of thermal degradation on properties of electrical machine winding insulation material 

      Sumislawska, Malgorzata; Gyftakis, Konstantinos N; Kavanagh, Darren F.; McCulloch, Malcolm D.; Burnham, Keith J.; Howey, David A. (IEEE, 2016)
      Interturn stator short circuits can develop quickly leading to serious damage of an electric machine. However, degradation mechanisms of winding insulation material are not yet fully understood. Therefore, the main ...

    • The Internet in East Africa: a mixed methods study 

      Ó Briain, Diarmuid; Denieffe, David; Okello, Dorothy; Kavanagh, Yvonne (East African Journal of Science, Technology and Innovation, 2020)
      East Africa was the last major area of the world to gain access to the Internet when submarine fibre-optic cables landed at Mombasa, Kenya and Dar-es-Salaam, Tanzania in 2009. The region previously relied on satellite ...

    • Investigation of a modified circular nozzle for cold spray applications 

      Sharma, Amit Kumar; Vashishtha, Ashish; Callaghan, Dean; Bakshi, Srinivasan Rao; Kamaraj, M.; Raghavendra, Ramesh (ASM International, 2023-05-22)
      The current work numerically evaluates the efficacy of a coflowing nozzle for cold spray applications with the aim to mitigate nozzle clogging by reducing the length of its divergent section. The high-pressure nitrogen ...

    • Mach number dependence of flow instability around a spiked body 

      Vashishtha, Ashish; Khurana, Shashank (AIP Publishing, 2023-05-05)
      A forward-facing aerospike have been identified as a passive flow control device for enhancing the aerodynamic efficiency and reducing the heat transfer in high-speed flows. In addition, it has been reported that the ...

    • Microfluidics in haemostasis: A review 

      Jigar Panchal, Heta; Kent, Nigel J.; Knox, Andrew J.S.; Harris, Leanne F. (MDPI, 2020)
      Haemostatic disorders are both complex and costly in relation to both their treatment and subsequent management. As leading causes of mortality worldwide, there is an ever-increasing drive to improve the diagnosis and ...

    • A new optical method of continuously analysing the surface properties of a single pendant drop while obtaining quality bulk spectral and refractive index measurements of the liquid-under-test 

      McMillan, Norman D.; O'Rourke, B.; Morrin, D.; Pringuet, P.; Smith, S.R.P.; O'Neill, M.; Hammond, J.; Riedel, S.; Carbery, Des (IOP Publishing, 2009)
      The classical stalagmometer has been replaced by the tensiometer to measure surface properties from drop volume. From the drop period T1, converted into volume, the surface properties of the liquid can be obtained. In the ...

    • Novel mechanism of instability control using tapered spike in hypersonic flow 

      Vashishtha, Ashish; Khurana, Shashank (American Institute of Aeronautics and Astronautics, 2021-08-02)
      A forward facing spiked blunt nose in high-speed flows is associated with pulsating flow behavior of varying amplitudes depending on spike-nose and length, the forebody geometry and flow conditions. A tapered spike has ...

    • Numerical investigation of detonation propagation through small orifice holes 

      Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (Sciendo, 2021)
      Seeking to better understand the physical phenomena underlying detonation wave propagation through small holes (especially the phenomenon of detonation re-initiation or its failure), we investigated the propagation of a ...

    • Numerical investigation of the impact of injectors location on fuel mixing in the hifire 2 scramjet combustor 

      Palateerdham, S.K.; Phaneendra Peri, L.N.; Ingenito, A.; Vashishtha, A. (2023)
      In scramjets, the position and direction of the injectors plays a crucial role for fuel/air mixing and combustion efficiency. Fuel injection is still a potential topic of research to be addressed, in fact an effective ...

    • Numerical studies of ram-air Intake for near-earth satellites 

      Ravuri, Nishita; Scully, Stephen; Vashishtha, Ashish (American Institute of Aeronautics and Astronautics, Inc., 2024-01)
      The operation of satellites in Earth orbits with altitudes lower than 450 km involves dealing with rarefied atmosphere environment. To compensate for the aerodynamic drag present in this low-density atmosphere, satellites ...

    • Numerical study of an aerospike nozzle in retropropulsion 

      Vashishtha, Ashish; Khurana, Shashank; Callaghan, Dean; Nolan, Cathal (Council of European Aerospace Societies, 2021)
      The primary motivation of this numerical study is to explore the feasibility of drag enhancement using aerospike nozzle for retropropulsion in hypersonic flow. An external expansion contoured aerospike nozzle with design ...

    • Numerical study of oblique detonation wave control for fuel blends 

      Kore, Rushikesh; Vashishtha, Ashish (2023)
      The current study is motivated to develop control strategies for oblique detonation wave formation on a finite length wedge in a premixed methane-air mixture. The effectiveness of hydrogen blends (0 - 100%) to methaneair ...

    • Oblique Detonation Wave Control with O3 and H2O2 Sensitization in Hypersonic Flow 

      Vashishtha, Ashish; Panigrahy, Snehasish; Campi, Dino; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (MDPI journals, 2022-06-04)
      This numerical study investigates the effects of adding a small amount of ignition promoters for controlling the wedge-induced oblique shock wave (OSW) to oblique detonation wave (ODW) transition in a premixed hydrogen–air ...

    • On unsteady flow analysis of a round spike blunt nose afterbody in mach 6 flow 

      Vashishtha, Ashish; Khurana, Shashank (IOP Publishing Ltd, 2021)
      An aerospike, in front of a blunt body, has largely been deemed as a key passive control device for effectively reducing the wave drag and aerodynamic heating associated with high-speed flows. In addition, it has been ...

    • An Open-Source Testbed to Visualise ICS Cybersecurity Weaknesses and Remediation Strategies – A Research Agenda Proposal 

      Ó Briain, Diarmuid; Ekisa, Conrad; Kavanagh, Yvonne (IEEE, 2021-07)
      Industrial Control Systems (ICS) are responsible for the control of several processes in various critical infrastructure deployments ranging from energy, power and water utilities, to manufacturing sectors such as ...

    • Particle Acceleration Through Coaxial Co-Flow Nozzles for Cold Spray Applications 

      Kumar Sharma, Amit; Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Bakshi, Srinivasan; Kamaraj, M.; Raghavendra, Ramesh (ITSC 2022 Thermal Spray Conference and Exposition, 2022)
      The present study numerically investigates the effectiveness of co-flowing nozzle for cold spray application. A convergent - divergent axi-symmetric nozzles have been simulated with high-pressure nitrogen flow. The particle ...

    • Pulsating flow investigation for spiked blunt-nose body in hypersonic flow and its control 

      Vashishtha, Ashish; Khurana, Shashank (American Institute of Aeronautics and Astronautics, 2021-01)
      An aerospike, as a technique for drag reduction and heat transfer in high-speed flows, is associated with instabilities. To understand the pulsating flow behavior in front of forward facing spiked blunt nose, numerical ...

    • QUBIC : exploring the primordial universe with the q&u bolometric interferometer 

      Mennella, Aniello; Ade, Peter; Amico, Giorgio; Auguste, Didier; Aumont, Jonathan; Banfi, Stephano; Barbarán, Gustavo; Battaglia, Paola; Battistelli, Elia; Bau, Alessandro; Bélier, Benoit; Bennett, David G.; Bergé, Laurent; Bernard, Jean Philippe; Bersanelli, Marco; Bigot Sazy, Marie Anne; Bleurvacq, Nathan; Bonaparte, Juan; Bonis, Julien; Bunn, Emory; Burke, David; Buzi, Daniele; Buzzelli, Alessandro; Cavaliere, Francesco; Chanial, Pierre; Chapron, Claude; Charlassier, Romain; Columbro, Fabio; Coppi, Gabriele; Coppolecchia, Alessandro; D'Agostino, Rocco; D'Alessandro, Giuseppe; De Bernardis, Paolo; De Gasperis, Giancarlo; De Leo, Michele; De Petris, Marco; Di Donato, Andres; Dumoulin, Louis; Etchegoyen, Alberto; Fasciszewski, Adrián; Franceschet, Cristian; Gamboa Lerena, Martin Miguel; Garcia, Beatriz; Garrido, Xavier; Gaspard, Michel; Gault, Amanda; Gayer, Donnacha; Gervasi, Massimo; Giard, Martin; Giraud Héraud, Yannick; Gómez Berisso, Mariano; González, Manuel; Gradziel, Marcin; Grandsire, Laurent; Guerard, Eric; Hamilton, Jean Christophe; Harari, Diego; Haynes, Vic; Henrot Versillé, Sophie; Hoang, Duc Thuong; Holtzer, Nicolas; Incardona, Federico; Jules, Eric; Kaplan, Jean; Korotkov, Andrei; Kristukat, Christian; Lamagna, Luca; Loucatos, Sotiris; Louis, Thibaut; Lowitz, Amy; Lukovic, Vladimir; Luterstein, Raúl Horacio; Maffei, Bruno; Marnieros, Stefanos; Masi, Silvia; Mattei, Angelo; May, Andrew; McCulloch, Mark; Medina, Maria Clementina; Mele, Lorenzo; Melhuish, Simon J.; Montier, Ludovic; Mousset, Louise; Mundo, Luis Mariano; Murphy, John Anthony; Murphy, James David; O'Sullivan, Creidhe; Olivieri, Emiliano; Paiella, Alessandro; Pajot, Francois; Passerini, Andrea; Pastoriza, Hernan; Pelosi, Alessandro; Perbost, Camille; Perciballi, Maurizio; Pezzotta, Federico; Piacentini, Francesco; Piat, Michel; Piccirillo, Lucio; Pisano, Giampaolo; Polenta, Gianluca; Prele, Damien; Puddu, Roberto; Rambaud, Damien; Ringegni, Pablo; Romero, Gustavo E.; Salatino, Maria; Schillaci, Alessandro; Scóccola, Claudia G.; Scully, Stephen P.; Spinelli, Sebastiano; Stankowiak, Guillaume; Stolpovskiy, Michail; Suarez, Federico; Tartari, Andrea; Thermeau, Jean Pierre; Timbie, Peter; Tomasi, Maurizio; Torchinsky, Steve A.; Tristram, Matthieu; Tucker, Carole E.; Tucker, Gregory S.; Vanneste, Sylvain; Viganó, Daniele; Vittorio, Nicola; Voisin, Fabrice; Watson, Robert; Wicek, Francois; Zannoni, Mario; Zullo, Antonio (MDPI, 2019-01-23)
      In this paper, we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines the sensitivity of state-of-the-art bolometric detectors with the systematic effects control ...