Net impulse measurements of pulse detonation tube by using fuel-air mixture

Sho Takeuchi, Naoki Doi, Jiro Kasahara, Motohide Murayama, Akiko Matsuo

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We carried out the net impulse measurements generated from the detonation tube filled with stoichiometric hydrogen-air mixture at an atmospheric pressure and a room temperature. In order to accurate measurement involves the outflow of unburned mixture, a diaphragm-less detonation tube was used. The net impulse measured directly by using the ballistic pendulum apparatus and pressure-based value obtained from thrust wall pressure at close end of the tube. Obstacles which promote deflagration-to-detonation transition, DDT, were arranged in varied blockage ratio, BR and varied length respectively. From the result of a series of experiments that BR taken as a parameter, DDT occurred in the range of BR = 0.17-0.43. The specific impulse has maximum value under the condition of BR ≅ 0.2. It was obtained minimized of the momentum losses from the comparison with theoretical value calculated based on simplified PDE model [Endo, T., Kasahara, J., and Fujiwara, T., "Pressure History at the Thrust Wall of a Simplified Pulse Detonation Engine", AIAA Journal, Vol.42, No.9, pp. 1921-1930, 2004.]. From the comparison of net impulse between DDT and no DDT condition, it was confirmed to obtain high thrust in constant volume combustion, CVC, mode. Impulse losses under the condition of lower BR mainly due to outflow of unburned mass induced by pressure waves ahead of a flame front.

本文言語English
ホスト出版物のタイトル48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
出版ステータスPublished - 2010 12 13
イベント48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
継続期間: 2010 1 42010 1 7

出版物シリーズ

名前48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Other

Other48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityOrlando, FL
Period10/1/410/1/7

ASJC Scopus subject areas

  • Aerospace Engineering

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