Design Methodology for a Pulse Detonation Engine as a Ramjet Replacement

Harris, Paul G.; Stowe, Robert; Guzik, Stephen M.

doi:10.2514/6.2004-3400

Cited by 13 publications

(3 citation statements)

References 33 publications

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“…Harris et al 38 evaluated the respective performance of zero-, one-, and two-dimensional models for the PDE cycle and concluded that Talley and Coy's model 37 offers a good approxima- tion of the time-averaged performance. Harris et al 39,40 have further developed their models and have performed comparisons with twodimensional numerical simulations.…”

Section: A Vmentioning

confidence: 99%

Model for the Performance of Airbreathing Pulse-Detonation Engines

Wintenberger

Shepherd

2006

Journal of Propulsion and Power

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A simplified flowpath analysis of a single-tube airbreathing pulse detonation engine is described. The configuration consists of a steady supersonic inlet, a large plenum, a valve, and a straight detonation tube (no exit nozzle). The interaction of the filling process with the detonation is studied, and it is shown how the flow in the plenum is coupled with the flow in the detonation tube. This coupling results in total pressure losses and pressure oscillations in the plenum caused by the unsteadiness of the flow. Moreover, the filling process generates a moving flow into which the detonation has to initiate and propagate. An analytical model is developed for predicting the flow and estimating performance based on an open-system control volume analysis and gasdynamics. The existing single-cycle impulse model is extended to include the effect of filling velocity on detonation tube impulse. Based on this, the engine thrust is found to be the sum of the contributions of detonation tube impulse, momentum, and pressure terms. Performance calculations for pulse detonation engines operating with stoichiometric hydrogen-air and JP10-air are presented and compared to the performance of the ideal ramjet over a range of Mach numbers. Nomenclature

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Section: A Vmentioning

confidence: 99%

Model for the Performance of Airbreathing Pulse-Detonation Engines

Wintenberger

Shepherd

2006

Journal of Propulsion and Power

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“…Numerous agencies and institutions [3][4][5][6][7] are investigating these systems both numerically and experimentally with the goal of determining their practical performance potential. Various concepts and applications have been proposed and explored, but little experimental data exist on systems operating at expected flight conditions, frequencies, and fuel distributions representative of practical fuel injection strategies.…”

mentioning

confidence: 99%

Fuel Distribution Effects on Pulse Detonation Engine Operation and Performance

Brophy

Hanson

2006

Journal of Propulsion and Power

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The validity and accuracy of performance measurements for pulse detonation engines depend on the ability to accurately measure thrust and fuel mass flow rates during system operation. Experimental tests have revealed that when fuel mass flow rates are calculated by conventional mass metering methods, incorrect values of the aggregate fuel mass in the combustor will often be calculated due to inaccurate assumptions regarding the spatial fuel distribution. The difficulty in predicting the actual fuel distribution affects the ability to achieve reliable detonations for successful operation and introduces inaccuracies directly into the performance calculations. Tunable diode laser and absorption spectroscopy techniques have been applied to provide time-resolved fuel mass fraction measurements and improve the fidelity of the specific impulse calculations. Results show that stratified fuel distributions that begin near stoichiometric at the forward end of the combustor and gradually become fuel lean near the combustor exit produce substantially higher specific impulse values than axially uniform fuel distributions with the same amount of aggregate fuel due to the ability to reliably detonate while operating at an overall lean condition. Axially uniform fuel distributions at the same average equivalence ratio demonstrated lower detonability and accordingly had lower thrust and specific impulse values.

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“…One of these utilizes thermodynamic and analytic models while the second approach involves numerical simulations 9 .…”

Section: Simulationmentioning

confidence: 99%

Intake Flow Analysis of a Pulsed Detonation Engine

Strafaccia

2016

Journal of Engineering for Gas Turbines and Power

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A CFD program is converted and modified to explore 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 the MATLAB architecture, taking full advantage of user availability and post processing convenience. The converted program was validated against the original program and modified to include a primitive intake manifold system with a single fuel injector located approximately 10 feet upstream of the primary intake valve. Constant fuel mass flow rate at the injector end creates local variations in equivalence ratio throughout the PDE that may have significant impact on overall engine performance. The results of the current thesis research suggest that performance effects of up to 21% can be attributed to non-uniform fuel distribution throughout the detonation process and are most prevalent at lower frequencies and fill ratios.iii DEDICATION This thesis is dedicated to my family. In particular, to my wife and daughter who endured the many late nights and long hours needed to fulfill this lifelong academic goal and to my parents who taught me the meaning of hard work, commitment and sacrifice.iv

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Design Methodology for a Pulse Detonation Engine as a Ramjet Replacement

Cited by 13 publications

References 33 publications

Model for the Performance of Airbreathing Pulse-Detonation Engines

Model for the Performance of Airbreathing Pulse-Detonation Engines

Fuel Distribution Effects on Pulse Detonation Engine Operation and Performance

Intake Flow Analysis of a Pulsed Detonation Engine

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