Essays about: "air flow"

Showing result 1 - 5 of 319 essays containing the words air flow.

  1. 1. 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

  2. 2. CFD Simulations of Flow Characteristics of a Piano Key Weir Spillway

    University essay from Uppsala universitet/Elektricitetslära; Uppsala universitet/Elektricitetslära

    Author : William Sjösten; Victor Vadling; [2020]
    Keywords : Piano Key Weir; Ansys Fluent; Multiphase Flow; Spillway; Flow Characteristics; CFD; Realizable k-epsilon; Volume of Fluid; Renolds-averaged Navier-Stokes;

    Abstract : Comprehensive rehabilitation projects of dam spillways are made in Sweden, due to stricter dam safety guidelines for their discharge capacity. The Piano Key Weir (PKW) is an innovative design which has proven effective through several renovation projects made in many countries including France. READ MORE

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

    University essay from KTH/Betongbyggnad; KTH/Betongbyggnad

    Author : Jorge CONTRERAS MORENO; KIBRET DAWIT GHEBREIGZIABHER; [2020]
    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

  4. 4. Influence of Reynolds Number and Heat Flux when Cooling an Array of Cylinders

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Erik Fagerström; [2020]
    Keywords : Reynolds Number; Heat Flux; Porous Media; Cooling;

    Abstract : When batteries are used, it is of interest to know how high the temperature will become and if the cooling is efficient enough. In this thesis project, the geometry used are batteries placed in an array shape, inside a box. This gives the possibility of assuming porosity conditions when looking at the box from the outside. READ MORE

  5. 5. Feasibility study for a 300kW pilot scale hydrogen production process from wood biomass : The case of Sandviksverket, Växjö

    University essay from Linnéuniversitetet/Institutionen för byggd miljö och energiteknik (BET)

    Author : Derick Samjeila Ewang; [2020]
    Keywords : Hydrogen; Biomass; Pyrolysis; Gasification; Combustion.;

    Abstract : Historically, fossil fuel sources (coal, oil and natural gas) have played significant role in meet global energy demand. As global population continue to rise, more and more energy resources are needed and there is a continuous depletion of these energy resources. READ MORE