CaltechAUTHORS
  A Caltech Library Service

Detonation Tube Impulse in Subatmospheric Environments

Cooper, M. and Shepherd, J. E. (2006) Detonation Tube Impulse in Subatmospheric Environments. Journal of Propulsion and Power, 22 (4). pp. 845-851. ISSN 0748-4658. https://resolver.caltech.edu/CaltechAUTHORS:COOjpp06

[img]
Preview
PDF - Published Version
See Usage Policy.

640Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:COOjpp06

Abstract

Thrust from a multicycle pulse detonation engine operating at practical flight altitudes will vary with surrounding environment pressure.We have carried out the first experimental study using a detonation tube hung in a ballistic pendulum arrangement within a large pressure vessel to determine the effect that the environment has on the single-cycle impulse. Air pressure decreased below 100 kPa, whereas initial pressure of the stoichiometric ethylene–oxygen mixture inside the tube varied between 100 and 30 kPa. The original impulse model (Wintenberger et al., Journal of Propulsion and Power, Vol. 19, No. 1, 2002, pp. 22–38) was modified to predict the observed increase in impulse and blowdown time as the environmental pressure decreased below 1 atm. Comparisons between the impulse from detonation tubes and ideal steady-flow rockets indicate incomplete expansion of the detonation tube exhaust, resulting in a 37% difference in impulse at a pressure ratio (ratio of pressure behind the Taylor wave to environmental pressure) of 100.


Item Type:Article
ORCID:
AuthorORCID
Shepherd, J. E.0000-0003-3181-9310
Additional Information:Copyright © 2005 by California Institute of Technology. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Received 5 April 2005; revision received 27 September 2005; accepted for publication 27 September 2005. This work was supported by the Office of Naval Research Multidisciplinary University Research Initiative Multidisciplinary Study of Pulse Detonation Engine (N00014-02-1-0589), and General Electric Contract GE-PO A02 81655 under DABT-63-0-0001.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Office of Naval ResearchN00014-02-1-0589
General ElectricGE-PO A02 81655
Issue or Number:4
Record Number:CaltechAUTHORS:COOjpp06
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:COOjpp06
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11253
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:28 Jul 2008 20:55
Last Modified:03 Oct 2019 00:17

Repository Staff Only: item control page