Essays about: "Tunnels"

Showing result 1 - 5 of 89 essays containing the word Tunnels.

  1. 1. Ash distribution and cavities in Icelandic glaciers, a marker for snow accumulation and radar signal velocity change

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Andrea Håkansson; [2020-01-15]
    Keywords : Iceland; GPR; CMP; Glacier; Vatnajökull; Háabunga; Langjökull;

    Abstract : Glaciers in the geologically active Iceland has a high scientific as well as touristic value.In this thesis, the two largest glaciers on Iceland have been studied with GPR to find ifthe method is suitable to use in future glaciolocial studies where accumulation patternsand similar attributes are in focus in a world of deglaciation. READ MORE

  2. 2. Autonomous Aerial Void Exploration

    University essay from Luleå tekniska universitet/Datavetenskap

    Author : Emil Vidmark; [2020]
    Keywords : Robotics; Quadrotor; Autonomous Vehicles; Autonomous Exploration;

    Abstract : Deploying robots in unknown and complex areas for inspection tasks is becoming a real need for various application scenarios. Recently, there has been an increasing interest to develop and use autonomous aerial robots in environments such as urban voids and subterranean mine tunnels, aiming to decrease the human presence in dangerous or inaccessible areas. READ MORE

  3. 3. Numerical Study on Air Demand of Free Surface Flows in a Discharge Tunnel

    University essay from Uppsala universitet/Institutionen för fysik och astronomi; Uppsala universitet/Institutionen för fysik och astronomi

    Author : Jonathan Barassa; Rickard Nordlöf; [2020]
    Keywords : Computational Fluid mechanics; Hydropower; Air demand; Free surface flows; ANSYS Fluent;

    Abstract : Aeration issued through a ventilation shaft is an important measure to prevent cavitation and large gauge pressure in flood discharge tunnels. In order to dimension the ventilation shaft appropriately, itis necessary to have a good understanding of the air-water flow in the tunnel. READ MORE

  4. 4. Aeration and risk mitigation for flood discharge tunnel in Zipingpu water conservancy project

    University essay from KTH/Betongbyggnad; KTH/Betongbyggnad

    Keywords : Flood discharge tunnel; cavitation risk; cavitation index; aerators; CFD model;

    Abstract : The importance of hydraulic structures has become an essential mitigating mean for floodsthat occur more often due to climate change. Thus, the importance and safety of flooddischarge tunnels has promoted further studies and experiments on the topic to mitigatedamages, such as cavitation that arise because of high speed flows. READ MORE

  5. 5. Maglev deployment in winter climate

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Axel Thorstrand; [2020]
    Keywords : ;

    Abstract : As of year 2020, maglev train systems are not in service in areas with harsh winter climate. Compared to conventional railway, the technology is relatively new and untested in conditions of low temperatures, icing and snow. READ MORE