Determination of the effect of frequency and spark timing on the thrust using a lab-scale pulsed detonation engine

Haiting Liu, Eric M. Crisp, Jeffrey D. Moore, Grant Alexander Risha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An experimental study was performed on an ethylene-oxygen-air pulse detonation engine (PDE) to examine the effect of frequency and spark timing on the thrust output and efficiency. Dynamic pressure measurements were recorded throughout the system over the testing interval to determine exhaust velocities. Multiple scripts were programmed to evaluate the raw data from the experiments to determine instantaneous velocity, thrust, and frequency. Efficiency was evaluated based on the experimental average frequency and the experimental average velocity. Results on experimental thrust, detonation frequency, and Chapman-Jouguet velocities were analyzed. It was determined that for a spark delay time of 2 ms, maximum efficiency and thrust were achieved for given frequencies. As spark delay time increased beyond 6 ms, testing became erratic, with pulses misfiring and a decrease in efficiency and thrust was observed until no combustion occurred beyond a spark delay time of 8 ms.

Original languageEnglish (US)
Title of host publicationAIAA Propulsion and Energy Forum and Exposition, 2019
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105906
DOIs
StatePublished - Jan 1 2019
EventAIAA Propulsion and Energy Forum and Exposition, 2019 - Indianapolis, United States
Duration: Aug 19 2019Aug 22 2019

Publication series

NameAIAA Propulsion and Energy Forum and Exposition, 2019

Conference

ConferenceAIAA Propulsion and Energy Forum and Exposition, 2019
CountryUnited States
CityIndianapolis
Period8/19/198/22/19

All Science Journal Classification (ASJC) codes

  • Energy(all)
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Mechanical Engineering

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  • Cite this

    Liu, H., Crisp, E. M., Moore, J. D., & Risha, G. A. (2019). Determination of the effect of frequency and spark timing on the thrust using a lab-scale pulsed detonation engine. In AIAA Propulsion and Energy Forum and Exposition, 2019 (AIAA Propulsion and Energy Forum and Exposition, 2019). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2019-4071