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Filtering by: Creator Blanchard, David, L. (David Lee) Remove constraint Creator: Blanchard, David, L. (David Lee) Academic Affiliation Mechanical, Industrial, and Manufacturing Engineering Remove constraint Academic Affiliation: Mechanical, Industrial, and Manufacturing Engineering

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  • Comparison of the Accuracy and Applicability of Forebody Wake Effect Models for Parachute System Design

    Creator:
    Kemling, Gabriel H. and Blunck, David L.
    Abstract:
    The forebody wake effect (FWE) is important to consider when designing parachute systems because it can affect parachute performance. Parachutes work by altering the aerodynamic properties of an attached forebody to control a descent. The FWE can reduce parachute drag, causing the system to descend faster than desired. This drag...
    Resource Type:
    Research Paper
    Full Text:
    Gabriel H. Kemling1 and David L. Blunck2 Oregon State University, Corvallis, Oregon, 97330, United States

  • Influence of Two-Phase Fuel on Detonation Behavior

    Creator:
    Barlow, Dustin
    Abstract:
    Detonation combustion is of great interest for propulsion devices because of its potential to increase thermodynamic efficiency, reduce the weight of current gas turbine engines, and rapidly accelerate to high Mach numbers. Detonation engines might also have the ability to decrease harmful exhaust products from traditional propulsion methods. In order...
    Resource Type:
    Masters Thesis
    Full Text:
    : ____________________________________________________ David L. Blunck Detonation combustion is of great interest for propulsion devices

  • Effects of Residual CO2 and N2 on Detonation Velocity and Detonation Limits

    Creator:
    Glad, Harley R.
    Abstract:
    Detonation combustion has gained interest throughout the years because of its potential to increase thermodynamic cycle efficiency when compared to deflagration based cycles. The expected benefits result from a pressure gain during the combustion process instead of a pressure drop, as observed for deflagrations. The implementation of detonations can be...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: _____________________________________________________________________ David L

  • 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

  • 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

  • Identifying the Effects of Combustion Products, Turbulent Fluctuations, and Delivered Energy on Ignition Characteristics of Forced Ignition of Jet-A/air Mixtures

    Creator:
    Teope, Kaz I.
    Abstract:
    The operation of gas turbine engines depends on the reliable ignition of fuel/air mixtures. Gas turbine engines are commonly used as commercial and military aviation power plants. However, consistent ignition within gas turbine engines is still a problem, especially for more challenging operating conditions such as emergency operations. This work...
    Resource Type:
    Dissertation
    Full Text:
    Characteristics of Forced Ignition of Jet-A/air Mixtures Abstract approved: David L. Blunck The operation of

  • 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

  • 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

  • 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

  • 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