Search for dissertations about: "bed plate"

Showing result 1 - 5 of 28 swedish dissertations containing the words bed plate.

  2. 1. Fluidized Bed Operating Parameters and Eulerian Erosion Models

    Author : Mattias Gustavsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Eulerian erosion model; fluidized bed; distributor plate; slugging; plenum chamber; brittle; two-fluid model; ductile; air-feed system;

    Abstract : A numerical two-fluid code, Gemini 2D, was adapted to study gas-solid fluidization in arbitrary 2D domains. The code was also used to study fluid dynamic mechanisms of dense particle flow that cause ductile and brittle erosion of solids. READ MORE

  4. 2. Experiments and Predictions of Heat Transfer Characteristics in Circulating Fluidized Bed Boilders

    Author : Mohammad Golriz; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; heat transfer coefficient; circulating fluidized bed; membrane wall; boilers; thermal boundary layer; predictions; experiments;

    Abstract : This thesis presents experiments and predictions of heat transfer characteristics in circulating fluidized bed boilers. The boiler used for the experiments has a maximum load of 12 MWth, and the dimensions of the combustion chamber are 1.4 m x 1.7 m x 1 3. READ MORE

  5. 3. Development of Structural Steels for Powder Bed Fusion - Laser Beam

    Author : William Hearn; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tensile properties; in situ tempering; process development; martensite; additive manufacturing; cold cracking; low-alloy steel; structural steel; powder bed fusion – laser beam; carbon steel;

    Abstract : Over the past decade, powder bed fusion – laser beam (PBF-LB) has attracted noticeable attention from both academia and industry. However, there remains a scarcity of approved material for the process, as fewer than 40 alloys are commercially available. READ MORE

  6. 4. Electron beam-powder bed fusion of Alloy 718 : Effect of process parameters on microstructure evolution

    Author : Paria Karimi Neghlani; Joel Andersson; Joakim Ålgårdh; Iain Todd; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive manufacturing; Electron beam-powder bed fusion; Microstructure evolution; Microstructure tailoring; Process understanding; Alloy 718; Production Technology; Produktionsteknik;

    Abstract : Additive manufacturing (AM) is the technology of building 3D parts through layer-by-layer addition of material. Of the different types of AM techniques, electron beam-powder bed fusion (EB-PBF) has been used in this study. EB-PBF can build parts by melting metallic powders using an electron beam as the energy source. READ MORE

  7. 5. Laser Based Powder Bed Fusion of Plain Carbon and Low-Alloy Steels: Microstructure and Processability

    Author : William Hearn; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low-Alloy Steel; Additive Manufacturing; Lack of Fusion Porosity; Laser Based Powder Bed Fusion; Plain Carbon Steel; Intrinsic Heat Treatment; Keyhole Porosity; Cold Cracking;

    Abstract : Despite the prominence of laser based powder bed fusion (LB-PBF) as an additive manufacturing technique, the number of alloys that have been approved for the process remains limited. In traditional manufacturing, ferrous alloys are the most common alloy group, consisting primarily of plain carbon and low-alloy steels. READ MORE