Sökning: "Lean premixed"

Visar resultat 1 - 5 av 56 avhandlingar innehållade orden Lean premixed.

  1. 1. Wall Related Lean Premixed Combustion Modeled with Complex Chemistry

    Författare :Johan Andrae; KTH; []
    Nyckelord :Wall effects; premixed flames; flame quenching; numerical modeling; chemkin; boundary layer approximation; gasified biomass; fuel-NOx; hybrid catalytic combustor.; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Increased knowledge into the physics and chemistrycontrolling emissions from flame-surface interactions shouldhelp in the design of combustion engines featuring improvedfuel economy and reduced emissions. The overall aim of this work has been to obtain afundamental understanding of wall-related, premixed combustionusing numerical modeling with detailed chemical kinetics. LÄS MER

  3. 2. A Level-set Flamelet Library Model for Premixed Turbulent Combustion

    Författare :Per Nilsson; Strömningsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Termisk teknik; applied thermodynamics; Thermal engineering; Distance-function; Level-set; Flamelet Library; Flamelet; Turbulence; Premixed; Combustion; termodynamik; Gases; fluid dynamics; plasmas; Gaser; fluiddynamik; plasma; Motors and propulsion systems; Motorer; framdrivningssystem;

    Sammanfattning : The modelling of premixed turbulent combustion has been studied. Premixed turbulent combustion occurs in a range of applications, such as gas turbines and spark-ignition engines. LÄS MER

  4. 3. A Numerical Study of Reacting Flows Using Finite Rate Chemistry

    Författare :Mohammad Irannezhad; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion modeling; Lean blow off; Finite rate chemistry; Inlet boundary condition; Combustion; Lean premixed; Engine configuration; Pulse Detonation Engine; Emissions; URANS; Unsteady phenomena; Flame stabilization; Low Swirl Burner; Large Eddy Simulation; Dynamic flame; Working cycle;

    Sammanfattning : Fossil fuels will remain the main source of energy for mankind in theforeseeable future. Heat released in combustion of fossil fuels is alwaysaccompanied by emission of undesired pollutants. Environmental concernshave led to stringent emission rules for combustion industry speciallyfor reducing the amount of NOx production. LÄS MER

  5. 4. Laser Diagnostics Applied to Lean Premixed Swirling Flames - Simultaneous Flow Field and Scalar Measurements

    Författare :Per Petersson; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Volumetric Velocimetry; Low-swirl Flames; Premixed Flames; Turbulent Combustion; Particle Image Velocimetry; Laser Diagnostics; A.2014:Petersson; Combustion Diagnostics;

    Sammanfattning : The work reported here includes experimental studies of lean premixed swirling flames. Various laser-based optical diagnostic techniques were used to collect information under different operational conditions. Combined flow- and scalar field measurements were performed at high repetition rates for detailed studies of the turbulent flames. LÄS MER

  7. 5. Swirl stabilized premixed flame analysis using of LES and POD

    Författare :Piero Iudiciani; Strömningsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Precessing Vortex Core; Swirl stabilization; Lean Premixed Combustion; Proper Orthogonal Decomposition; Large Eddy Simulation;

    Sammanfattning : For environmental and human health reasons, the regulations on the emissions from combustion devices are getting more and more strict. In particular, it is important to abate the emission of pollutants deriving from combustion in gas turbines. A solution is the use of swirl stabilized, lean premixed combustion. LÄS MER