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Showing 1 to 20 of 43 for “"Laminar flame"”.

  1. Laminar flame propagation in a stratified charge

    Ra, Youngchul, 1968-Massachusetts Institute of Technology1999

    The propagation of laminar flame from a rich or stoichiometric mixture to a lean mixture in a stratified methane-air charge was investigated experimentally and numerically. Emphasis was on the understanding of the flame behavior in the transition region; in particular, on the mechanism of burning …

    mit Repository record

  2. Modelling of premixed laminar flame propagating in channels

    Li, FangUniversity of Central Lancashire2004

    … dynamics of the intrinsically unstable premixed flames propagating in channels is studied by means of numerical modelling in this work. Critical conditions of extinction and the influence of the thermal-diffusive effect on the dynamics of flame propagating in planar channels with cold sidewalls …

    cent-lancashire Repository record

  3. The Role of Fuel Droplets in Laminar Flame Propagation

    McGrath, DanteUniversity of Cambridge2022

    … thesis explores the role of fuel droplets in laminar flame propagation. In particular, the effect of fuel droplets on the burning velocity of strained laminar premixed flames was investigated via experimentation and simulation. The twin premixed counterflow configuration was used to measure …

    cambridge Repository record

  4. Laminar flame propagation in mixtures with compositional stratification at small length scales

    Schmidt, David P.University of Illinois at Urbana-Champaign2011

    The behavior and structure of laminar hydrocarbon flames which propagate parallel to the direction of a periodic gradient of mixture composition was studied both experimentally, using a specially designed burner, and computationally, using a planar numerical model. The variations in local mixture …

    uiuc Repository record

  5. The effects of molecular structures and reactant temperatures on soot formation in a coflow laminar flame

    Chu, Carson2021

    … on soot formation in a coflow diffusion flame. The study is motivated by the observation that soot formation is influenced by the flame boundary and ambient conditions, i.e. fuel species, pressure, temperature, etc. The effects of aromatic hydrocarbons and reactant temperatures have not …

    toronto-retro Repository record

  6. Numerical investigation of effects of addition of ethanol to gasoline on Laminar Flame Speed (LFS), autoignition, and wall quenching

    Syed, Iltesham Zameer

    mtu Repository record

  7. Laminar Flame Speed Estimation from Experimental Data Using a Quasi-Dimensional Turbulent Flame Entrainment Combustion Simulation For Spark Ignition Engines

    Desai, Akash

    clemson Repository record

  8. Modelling spherical flame propagation in a closed volume

    Scott, Ian StefanesDepartment of Chemical Engineering2014

    … combustion behaviour of alternative fuels. The laminar flame speed of a combustible mixture is a well defined combustion characteristic that influences the efficiency and performance of many combustion processes. An example of where flame speed has a strong impact on the performance of a …

    cape-town Repository record

  9. Research on late-robust combustion

    Wildman, Craig B. E. (Craig Bradley Edward), 1987-Massachusetts Institute of Technology2005

    … study was carried out in which charge motion or laminar flame speed was varied. Two sets of tests were done. The first consisted of using an air jet mounted in the intake port to generate charge motion at a spark-timing sweep from 20⁰ BTC to 200 ATC. Two jet orientations were tested with the …

    mit Repository record

  10. A fractal analysis of premixed turbulent flames

    Das, Aurobindo K.University of British Columbia1993

    … behavior of lean premixed wrinkled turbulent flames was investigated over a range of turbulence conditions. For this purpose a turbulent combustion rig was designed and built in which the turbulence intensity and scale could be independently varied by means of a set of grids. The relative …

    ubc Repository record

  11. Modified source-type flame model and vorticity generated by the flame and bluff bodies

    Kao, Shiung-poVirginia Tech1991

    … model is developed to simulate the wrinkled laminar flame sheet flapping in weakly turbulent premixed combustion. The wrinkled laminar flame sheet is represented by a discrete distribution of volume sources called source disks. These source disks are utilized to produce the acceleration of …

    vt Repository record

  12. Mechanisms of turbulent flame propagation

    Abdel-Gayed, Ramzy GUniversity of Leeds1978

    … were made. The ratio of turbulent to laminar burning velocity correlates well with both the turbulent Reynolds number of the reactants and the ratio of laminar burning velocity to r. m. s. turbulent velocity. The use of hydrogen-air mixtures has extended the data on premixed turbulent …

    whiterose Repository record

  13. Combustion characteristics of alternative liquid fuels

    Chong, Cheng TungUniversity of Cambridge2011

    … on the deflagration properties of biodiesel. The laminar flame speeds of Palm Methyl Esters (PME) and blends of PME with conventional fuels are determined using the jet-wall stagnation flame configuration. The same technique is also used to measure the laminar flame speed of diesel, Jet-A1, …

    cambridge Repository record

  14. Investigation of a prototype industrial gas turbine combustor using alternative gaseous fuels

    Sigfrid, IvanIvan Sigfrid2013

    … Before examination of the actual burner, the laminar flame speed was measured for a range of gases. The measurement technique was based on Schlieren imaging which is a measure of the density gradient through a flame surface. A Bunsen type burner was used to measure the angle of a conical flame …

    lund Repository record

  15. The effects of changes in engine geometry on the breathing and combustion in a spark ignition engine

    Newlyn, Hugh AnthonyDe Montfort University1982

    … attempt has been made to relate the turbulent to laminar flame speed ratio to the engine's physical parameters. These results compare well with previously published work by other workers.

    de-montfort Repository record

  16. Experimental investigation of unconfined bluff body stabilised flames with vapourised kerosene fuels

    Pathania, Rohit SinghUniversity of Cambridge2021

    … have increasingly implemented lean premixed flames as they facilitate low NOx and soot emissions. In most modern transport vehicles, combustion occurs under highly turbulent conditions. However, stabilizing lean premixed flames within the high Reynolds number conditions of practical devices …

    cambridge Repository record

  17. Fundamental studies of premixed combustion

    Haq, Md ZahurulUniversity of Leeds1998

    … a fundamental study of spherical premixed flame propagation,originating at a point under both laminar and turbulent propagation. Schlieren cine photography has been employed to study laminar flame propagation, while planar mie scattering (PMS) has elucidated important aspects of turbulent …

    whiterose Repository record

  18. Transient Phenomena in Annular Combustors

    Ciardiello, RobertoUniversity of Cambridge2021

    … a wide data set including stability limits, flame regimes and physical mechanisms of ignition and extinction. The first part of the investigation focused on the lean blow-off (LBO). Experiments were carried out on a premixed annular combustor, comprising a variable number of injectors, …

    cambridge Repository record

  19. Combustion lean limits fundamentals and their application to a SI hydrogen-enhanced engine concept

    Ayala, Ferran A. (Ferran Alberto), 1976-Massachusetts Institute of Technology2006

    … of lean combustion. Due to hydrogen's high laminar flame speed, adding a hydrogen-rich mixture with gasoline into the engine helps stabilize combustion, extending the lean limit. This work studies the fundamental behavior of lean combustion in a spark ignition (SI) engine, identifying the …

    mit Repository record

  20. Modelling and simulation of combustion of dilute syngas fuels in a CFR engine

    Padhi, Geet, author, Windom, Bret C., advisor, Olsen, Dan B., committee member, Dandy, David, committee memberColorado State University. Libraries2019

    … Fuel Research (CFR) spark ignited engine. The laminar flame speeds of the unique fuel mixtures calculated using CHEMKIN were coupled with the geometric features of the CFR engine to create a combustion model of the CFR engine in GT-POWER. Using two-zone modelling and detailed chemical kinetics, …

    colostate Repository record

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