Validation of pulse-detonation operation in low-ambient-pressure environment

Ken Matsuoka, Shunsuke Takagi, Jiro Kasahara, Akiko Matsuo, Ikkoh Funaki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A pulse-detonation thruster can generate a high-repeatability small impulse at a high operating frequency. To operate a pulse-detonation cycle in a vacuum environment without a purging material, a liquid-purge method proposed by Matsuoka et al. ("Development of a Liquid-Purge Method for High-Frequency Operation of Pulse Detonation Combustor," Combustion Science and Technology, Vol. 187, No. 5, 2015, pp. 747-764) and throat at the exit of the combustor were introduced. In the demonstration experiment, gaseous ethylene-liquid nitrous oxide, as detonable mixture, and a throat having an inner diameter of 3.6 mm (blockage ratio = 87%) were used. The measured cyclic flame-propagation speeds were 2005 ± 90 m/s and 92 ± 4% of the estimated Chapman-Jouguet detonation speed. Consequently, a 50 Hz pulse-detonation operation without a purging material in the ambientpressure range of 0.035-1.5 kPa was confirmed. A quasi-steady model, in which gases in the combustor are in the stationary state, was newly developed to investigate the operating characteristic of the pulse-detonation thruster. The experimental pressure history in the combustor during the burned-gas blowdown process was in good agreement with that of the model. Moreover, using the model, the thrust performance of the pulse-detonation thruster with a converging-diverging nozzle was investigated. It was found that the estimated specific impulse was comparable with that of the theoretical steady-state rocket engine.

Original languageEnglish
Pages (from-to)116-124
Number of pages9
JournalJournal of Propulsion and Power
Volume34
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Detonation
detonation
liquid
combustion chambers
Combustors
pulses
purging
Purging
throats
nitrous oxide
science and technology
gas
ethylene
engine
thrust
combustion
Liquids
liquids
specific impulse
rocket engines

ASJC Scopus subject areas

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

Validation of pulse-detonation operation in low-ambient-pressure environment. / Matsuoka, Ken; Takagi, Shunsuke; Kasahara, Jiro; Matsuo, Akiko; Funaki, Ikkoh.

In: Journal of Propulsion and Power, Vol. 34, No. 1, 01.01.2018, p. 116-124.

Research output: Contribution to journalArticle

Matsuoka, Ken ; Takagi, Shunsuke ; Kasahara, Jiro ; Matsuo, Akiko ; Funaki, Ikkoh. / Validation of pulse-detonation operation in low-ambient-pressure environment. In: Journal of Propulsion and Power. 2018 ; Vol. 34, No. 1. pp. 116-124.
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