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Parametric Investigation of Thrust Augmentation by Ejectors on a Pulsed Detonation Tube

Parametric Investigation of Thrust Augmentation by Ejectors on a Pulsed Detonation Tube


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About the Book

A parametric investigation has been made of thrust augmentation of a 1 in. diameter pulsed detonation tube by ejectors. A set of ejectors was used which permitted variation of the ejector length, diameter, and nose radius, according to a statistical design of experiment scheme. The maximum augmentation ratios for each ejector were fitted using a polynomial response surface, from which the optimum ratios of ejector diameter to detonation tube diameter, and ejector length and nose radius to ejector diameter, were found. Thrust augmentation ratios above a factor of 2 were measured. In these tests, the pulsed detonation device was run on approximately stoichiometric air-hydrogen mixtures, at a frequency of 20 Hz. Later measurements at a frequency of 40 Hz gave lower values of thrust augmentation. Measurements of thrust augmentation as a function of ejector entrance to detonation tube exit distance showed two maxima, one with the ejector entrance upstream, and one downstream, of the detonation tube exit. A thrust augmentation of 2.5 was observed using a tapered ejector.


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Product Details
  • ISBN-13: 9781289277475
  • Publisher: Bibliogov
  • Publisher Imprint: Bibliogov
  • Height: 246 mm
  • Weight: 64 gr
  • ISBN-10: 1289277478
  • Publisher Date: 06 Aug 2013
  • Binding: Paperback
  • Spine Width: 1 mm
  • Width: 189 mm


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