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Showing result 1 - 5 of 17 essays matching the above criteria.

  1. 1. Additives in a steam engine to decrease friction : Friction testing of solid lubricants in powder form

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Viktor Lange; [2023]
    Keywords : Tribology; friction; wear; steam; steam engine; ranotor; invencon; invencon AB; steel; contact mechanics; hexagonal boron nitride; molybdenum disulfide; tungsten disulfide; lubricants; solid lubricants; Tribologi; friktion; nötning; ånga; ångmotor; stål; kontaktmekanik; smörjning; smörjmedel; fasta smörjmedel;

    Abstract : This thesis aims to investigate the coefficient of friction between steel on steel contacts with the addition of solid lubricants such as h-BN, WS2, MoS2 in powder form, in dry conditions and wet conditions. More specifically, the purpose is to enhance the sliding between the piston rings and cylinder block in a modern high temperature steam engine developed by RANOTOR. READ MORE

  3. 2. Thermal Investigation of the Green Revolution Energy Converter : A study on the heat transfer within the GREC in regards of temperature distribution and heat rate

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : Wilma Fager; Maja Abrahamsson Bolstad; Emma Gustafsson; Emma Andersson; Matilda Eriksson; [2023]
    Keywords : GREC; Energy; Heat transfer; Heat rate; Temperature distribution;

    Abstract : To reduce emissions, new technological solutions can be of use. One technology which is currently being developed is the Green Revolution Energy Converter, GREC. GREC is an engine with the aim to produce electricity from temperature gradients.  This project is part of a greater project that is divided in two with different focus areas. READ MORE

  4. 3. Aerodynamic Optimization of Low Observable Engine Intake Duct

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Laszlo Vimlati; [2022]
    Keywords : NSGA-II; CFD; Air Intake; S-Duct; Optimization; Pressure Recovery; Distortion.; NSGA-II; CFD; Intagskanal; Optimering; Tryckåtervinst; Flödesdistorsion.;

    Abstract : An aerodynamic shape optimization procedure was performed on a low observable engineintake duct. The intake duct was fixed in its throat and aerodynamic interface plane (AIP)sections, while leaving up to 7 design parameters free to deformation in the centroid curveand mid section profile. READ MORE

  5. 4. Laboratory testing of shotcrete with fibres of steel, basalt or synthetic materials

    University essay from KTH/Betongbyggnad

    Author : Muralidharan Rengarajan; [2020]
    Keywords : Fibre reinforced shotcrete; Energy absorption; Residual strength; Fibres; and Laboratory testing;

    Abstract : Shotcrete or sprayed concrete has become an inevitable material for stabilising and supporting hard rock tunnels. To prevent rock block fallouts in the excavated tunnel, shotcrete is pneumatically projected under high pressure on the rock surface. READ MORE

  6. 5. Methods for rockfall risk assessment and estimation of runout zones: A case study in Gothenburg, SW Sweden

    University essay from Lunds universitet/Geologiska institutionen

    Author : Laura Catalina Agudelo Motta; [2020]
    Keywords : Rockfall hazard; rockfall simulation; Gothenburg; Fjällbo; runout zones; Earth and Environmental Sciences;

    Abstract : Rockfalls occur around Sweden every year and the country lacks a national risk evaluation and an adequate regulatory framework for construction related to this natural hazard. The aim of this study is to address this problem by mapping areas under possible threat of rockfalls, considering two fundamental aspects: i) identification of the source areas and ii) estimation of the runout zones. READ MORE