Sökning: "linear eddy model"

Visar resultat 1 - 5 av 20 avhandlingar innehållade orden linear eddy model.

  1. 1. Large eddy simulation using linear eddy sub-grid mixing modeling

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Salman Arshad; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Linear Eddy Model; Large Eddy Simulation; LES-LEM; Splicing;

    Sammanfattning : As emissions regulations are getting stricter and efficiency requirements of engines are increasing, different concepts to improve combustion are beinginvestigated. For example lean stratified premixed combustion, homogeneous charge compression ignition(HCCI), use of more exhaust gas recirculation (EGR) to reduce NOx etc. LÄS MER

  2. 2. Large eddy simulation of combustion using linear-eddy subgrid modeling

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Salman Arshad; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LES-LEM; splicing; turbulent combustion; super-grid LES-LEM; CFD; linear eddy model; reaction-rate closure; large eddy simulation;

    Sammanfattning : As emissions regulations are getting stricter and efficiency requirements of internal combustion engines (ICE) are increasing, different concepts to improve combustion are being investigated. For example lean stratified premixed combustion, homogeneous charge compression ignition (HCCI), use of more exhaust gas recirculation (EGR) to reduce NOx etc. LÄS MER

  3. 3. A representative interactive linear-eddy-model (RILEM) for simulating spray combustion

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Tim Lackmann; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; engine simulation; turbulent combustion; regime independent;

    Sammanfattning : Engine development aims at reducing pollutant emissions (e.g. NOx , soot,UHC) while maintaining high efficiencies. Detailed experimental resultsin combination with precise numerical predictions are of great importancein order to develop combustion systems for new clean and efficient inter-nal combustion engines. LÄS MER

  4. 4. Wave Energy Conversion Linear Synchronous Permanent Magnet Generator

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Oskar Danielsson; Uppsala universitet.; [2006]
    Nyckelord :Engineering physics; Finite element method; linear synchronous generator; longitudinal end effect; permanent magnet; point absorber; offshore testing; wave power; Teknisk fysik;

    Sammanfattning : This thesis studies the electric aspects of a linear synchronous permanent magnet generator. The generator is designed for use in a wave energy converter, which determines the fundamental requirements of the generator. The electromagnetic properties of the generator are investigated with a finite element based simulation tool. LÄS MER

  5. 5. Turbulence Modelling and Parallel Solver Development Relevant for Investigation of Gas Turbine Cooling Processes

    Detta är en avhandling från Division of Heat Transfer, Lund Institute of Technology

    Författare :Rongguang Jia; Lunds universitet.; Lund University.; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik; large eddy simulation; Reynolds stress transport model; turbulence modelling; multi-block; parallel computing; Impingement cooling; ribbed surface;

    Sammanfattning : To enhance the performance of gas turbine engines, high top-cycle temperatures are desired. However, the temperature is limited by current materials. LÄS MER