Detonability of propane/air and ethylene/air mixtures using combustion enhancing geometries for pulse detonation engine applications
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Authors
Sexton, Neil G.
Subjects
Advisors
Brophy, Christopher M.
Sanders, James V.
Date of Issue
2001-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
e combustion enhancing geometries: ability to generate a detonation, wave speed, and time for shock formation. The evaluated geometries included flow-restricting orifice plates and a Schelkin spiral. The shock reflection was accomplished by a vertical fence (large orifice) placed in the last fourth of the tube length. The optimum geometry was found to be the orifice plate used in conjunction with the spiral. Detonations occurred when using ethylene in this configuration, but did not develop when using propane. Because propane's overall reaction rate is slower than that of simpler fuels, more large- and small-scale turbulence to further enhance combustion needs to be generated to create a detonation wave in a short distance when using complex hydrocarbons, such as propane.
Type
Thesis
Description
Series/Report No
Department
Applied Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
xvi, 60 p. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.