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Filtering by: Advisor Crawford, David L. Remove constraint Advisor: Crawford, David L. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Temperature Evolution of Spark Kernels in Quiescent and Cross-flow Conditions

    Creator:
    Okhovat, Sebastian
    Abstract:
    Numerous physical and chemical processes are required for successful ignition of a flammable mixture, many of which have been well characterized. However, one aspect of the ignition process that has received limited consideration is understanding the temperature of the spark kernel. A spark kernel is the volume of heated gas...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ______________________________________________________ David L. Blunck

  • Radiation Emissions from Turbulent Diffusion Flames Burning Large Hydrocarbon Fuels

    Creator:
    Zeuthen, Eric D.
    Abstract:
    The purpose of this study is to measure and compare radiation emissions from flames burning large hydrocarbon fuels to assist in understanding how the molecular composition changes radiation emissions. Radiative heat transfer is significant because it is a primary mode of heat transfer for many combustion devices. This study also...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ David L. Blunck The purpose of this study is to measure and compare radiation emissions

  • Effects of Dilution on Turbulent Consumption Speeds of Jet Fuel

    Creator:
    Walters, Ian
    Abstract:
    Combustion systems for transportation applications typically use large hydrocarbon fuels in turbulent premixed or partially premixed environments. Combustion products can enter the reaction region through natural recirculation or combustion control mechanisms. The objective of this study is to characterize how dilution by combustion products affects the turbulent consumption speed for...
    Resource Type:
    Honors College Thesis
    Full Text:
    approved: ______________________________________________________ David Blunck Combustion systems for

  • Stability and Liftoff of Non-premixed Large Hydrocarbon Flames in MILD Conditions

    Creator:
    Walters, Eric M.
    Abstract:
    The Moderate or Intense Low-oxygen Dilution (MILD) combustion regime has received interest from the industrial furnace and gas turbine engine industries due to attractive properties of reduced NO[subscript x] emissions and high thermal efficiency. MILD combustion is characterized by low oxygen concentrations (i.e. 3%-9% by volume) and high reactant temperatures....
    Resource Type:
    Masters Thesis
    Full Text:
    Liftoff of Non-premixed Large Hydrocarbon Flames in MILD Conditions Abstract approved: David L. Blunck

  • The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames

    Creator:
    Fillo, Aaron Jesse
    Abstract:
    Large-hydrocarbon fuels are used for ground and air transportation because of their high energy-density and will be for the foreseeable future. However, combustion of large-hydrocarbon fuels in a turbulent environment is poorly understood and difficult to predict. The turbulent flame speed, which is the velocity at which a flame front...
    Resource Type:
    Masters Thesis
    Full Text:
    Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames Abstract approved: David L

  • Combustion Characteristics of a Jet Fuel and its Surrogate in MILD Conditions

    Creator:
    Weide, Parker D.
    Abstract:
    This research seeks to identify how changes in temperature and oxygen concentration in the reaction zone affects liftoff heights for moderate or intense low-oxygen dilution (MILD) combustion of a jet fuel and a surrogate fuel. MILD combustion offers a method of burning fuels with reduced CO and NOx production by...
    Resource Type:
    Masters Thesis
    Full Text:
    Characteristics of a Jet Fuel and its Surrogate in MILD Conditions Abstract approved: David L. Blunck This

  • Multi-Scale Study of Ember Production and Transport under Multiple Environmental and Fuel Conditions

    Creator:
    Hudson, Tyler R.
    Abstract:
    Spot fires caused by lofted embers (i.e., firebrands) can be a significant factor in the spread of wildland fires. Embers can be especially dangerous near the wildland-urban interface (WUI) because of the potential for the fire to be spread near or on structures. Many studies have investigated the transport of...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: David L. Blunck Spot fires caused by lofted embers (i.e., firebrands) can be a

  • Turbulent Combustion Analysis of Large Hydrocarbon Fuels in a Reduced Pressure Environment

    Creator:
    Schorn, Nathan E.
    Abstract:
    The aviation industry is pushing for better fuels and gas turbine engines for several reasons: cost, emissions, and to a lesser extent high-altitude relights. One aspect that research has been focused on to help reduce costs, emissions and better understand high-altitude relights is studying the combustion behavior of the fuel...
    Resource Type:
    Masters Thesis
    Full Text:
    Large Hydrocarbon Fuels in a Reduced Pressure Environment Abstract approved: David L. Blunck The

  • Radiation Emissions from Turbulent Premixed Jet-A/Air Flames Diluted with Combustion Products

    Creator:
    Hoter, Zohar R.
    Abstract:
    Heat flux measurements of radiation emissions from turbulent premixed flames diluted with N 2 and CO 2 were taken to identify sensitivities of radiation heat loss to diluent fraction and species. This work is motivated by the desire to better characterise radiant heat transfer in the presence of combustion products,...
    Resource Type:
    Honors College Thesis
    Full Text:
    :_____________________________________________________ David Blunck Heat flux measurements of radiation emissions from turbulent premixed

  • Temperature Evolution of Nonreacting Spark Kernels at Sub-Atmospheric Pressures

    Creator:
    Caplan, Daniel L.
    Abstract:
    In the event of a mid-flight flameout of a gas turbine engine, reignition is paramount to occupant safety. Ignition at high altitude can be challenging, due in part to the potentially lower ambient pressures. An understanding of the effects of sub-atmospheric pressures on the temperature evolution of spark kernels is...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________ David L. Blunck In the event of a mid-flight flameout of a gas turbine engine