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Small Scale Detonation Studies: Direct impulse measurements for detonations and deflagrations

Austin, J. M. and Cooper, M. and Jackson, S. and Wintenberger, E. and Shepherd, J. E. and Sturtevant, B. (2000) Small Scale Detonation Studies: Direct impulse measurements for detonations and deflagrations. California Institute of Technology , Pasadena, CA. (Unpublished) http://resolver.caltech.edu/CaltechGALCITFM:2000.005

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Abstract

This report is an account of research carried out from January to June 2000 on the feasibility of detonation initiation and impulse generation for small-scale pulse detonation engines. The initial work was focussed on the direct measurement of impulse using the ballistic pendulum technique for single detonations initiated in a tube with one end open to the atmosphere through a thin diaphragm. Three tubes were used: (1) 38-mm diameter by 1.5 m long. (2) 75-mm diameter by 0.6 m long. (3) 75-mm diameter by 1 m long. At the closed end of the tube, combustion was initiated by a low energy, less than 50 mJ, capacitor discharge system. A fast flame or detonation was created by transition to detonation. The effect of spirals and orifice plates was examined on propane- and ethylene-oxygen-nitrogen mixtures with varying initial pressure, equivalence ratio, and dilution amounts. A simple model for the impulse in prompt detonations was developed and calibrated. The results of our experiments were compared with this model.


Item Type:Report or Paper (Technical Report)
ORCID:
AuthorORCID
Shepherd, J. E.0000-0003-3181-9310
Additional Information:Explosion Dynamics Laboratory Report FM00-5. Prepared for General Electric, contract GE - PO A02 81655 under DABT-63-0-0001
Group:Graduate Aeronautical Laboratories (Fluid Mechanics)
Record Number:CaltechGALCITFM:2000.005
Persistent URL:http://resolver.caltech.edu/CaltechGALCITFM:2000.005
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:25817
Collection:CaltechGALCITFM
Deposited By: Imported from CaltechGALCITFM
Deposited On:25 May 2005
Last Modified:25 Feb 2014 20:21

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