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Showing 1 to 12 of 12 for “"pulse detonation"”.
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Methods of Diffusing Pulse Detonation Combustion
Pulse detonation combustion has been of interest for many years since it offers several advantages over standard deflagrative combustion. In theory, detonative combustion is a better use of fuel compared to deflagrative combustion since less entropy is generated during a detonation. As a result, …
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Transient heat transfer properties in a pulse detonation combustor
The heat transfer along the axis of a pulse detonation combustor has been characterized for various frequencies and fill fractions at 2.5 atmospheres of pressure for chamber refresh conditions. In a pulse detonation combustor, a supersonic detonation wave is the method for transforming chemical …
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Investigation of Pulse Detonation Engines; Theory, Design and Analysis
<p>Detonation and constant volume combustion has been known to the scientific community for some time but only recently has active research been done into its applications. Detonation based engines have received much attention in the last two decades because of its simple design and potential …
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Investigation of Pulse Detonation Engine Flow Conditions for Turbomachinery Integration
… turbine efficiency as well as current models for pulse detonation engine operation. A new simplified linear model for pulse detonation combustors is presented and compared to experimental data. This model is then implemented as an element in a cycle analysis code using Numerical Propulsion System …
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A Computational Study of Thermo-Fluid Dynamics of Pulse Detonation Engines
… occurring on a single cycle of an ideal Pulse Detonation Engine (PDE) using a stoichiometric mixture of H<sub>2</sub> and O<sub>2</sub>. A small zone of high pressure and temperature is used to initiate the detonation wave in the PDE. A simple case with no chemical reactions and the same …
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Investigation of Pulse Detonation Engines: the Effect of Variable Blockage Ratio on the Deflagration to Detonation Transition
<p>Detonation and constant volume combustion is well known to be thermodynamically more efficient than the typically utilized constant pressure. There have been numerous approaches of achieving detonation through deflagration-to-detonation transition most of which use evenly spaced obstacles with a …
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The Effect of Axial Spacing of Constant and Variable Blockages on the Deflagration-to-Detonation Transition in a Pulse Detonation Engine
… of obstacle spacing on the deflagration-to-detonation transition section length in a pulse detonation engine. Testing was conducted with one hundred and ninety-five different obstacle, and spacing configurations. The configurations included constant, as well as variable spacing between …
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Intake flow analysis of a pulsed detonation engine
… unsteady flow within the intake system of a pulse detonation engine (PDE). Using a quasi-one-dimensional approach the program provides insight into the unsteady nature of localized equivalence ratios to include their effects on PDE performance. The original FORTRAN program is converted into …
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Computational Simulation of Detonation Waves and Model Reduction for Reacting Flows
… is a crucial consideration in the design of detonation chambers of pulse detonation engines since it has a major impact on detonation ignition and operation efficiency. In this thesis, numerical simulations are used to study different geometrical configurations of detonation chambers and to …
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Fluidic Jet Turbulence Generators for Deflagration to Detonation Transition in Pulsed Detonation Combustors
… the turbulent deflagration flame front to detonation velocity in the shortest possible distance while using a single Jet in Cross Flow (JICF). Jets in crossflow, depending on orientation and momentum ratio, can induce two types of flow structures that propagate downstream; vortex filaments …
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On the Challenges of integrating a Rotating Detonation Combustor with an Industrial Gas Turbine and important design considerations for Row-1 Blades
… the constant-pressure Brayton Cycle has made detonation combustors, a type of PGC, an attractive alternative to traditional deflagration-type combustors. Since Rotating Detonation Combustors (RDC) can provide a quasi-steady mode of operation when compared to Pulse Detonation Combustors (PDC), …
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Multi-scale modeling of laser induced breakdown in non-equilibrium plasmas
… and beam wavelength), mode-beating temporal pulse histories (e.g., single-mode and multi-mode nano-second discharges), and pulse con figurations (e.g., single-pulse and dual-pulse nano-second discharges). The hydrodynamics is described based on the chemically reactive Navier-Stokes equations, …