Pulse Detonation Engines (PDE) operating on liquid hydrocarbon
fuels are limited to operating frequencies of 35 Hz due to long
ignition times from low energy ignition sources. This study shows
ignition time of JP-8 can be nearly eliminated by igniting a thrust
tube using a secondary detonation. A counter flow heat exchanger
attached to a thrust tube utilized waste heat from the detonation
process to heat JP-8 to supercritical conditions. The fuel flash
vaporized upon injection into the air stream of the engine, where a
detonation was produced by a spark in a 5 cm diameter, 1.37 m long
tube. Part of the detonation produced in the spark ignited tube was
branched through a 1.9 cm diameter crossover tube into the head of
second thrust tube. A pressure transducer and hydroxyl (OH) sensor
measured the combustion event that determined ignition time of the
second tube was eliminated. Branch detonation was performed over a
range of equivalence ratios ranging from 1.05 to 1.3. Branch
ignited thrust tubes have shown a 40% improvement in deflagration
to detonation transition (DDT) time and a slight improvement in DDT
distance.
General
Imprint: |
Biblioscholar
|
Country of origin: |
United States |
Release date: |
September 2012 |
First published: |
September 2012 |
Authors: |
J. Slack
|
Dimensions: |
246 x 189 x 5mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
102 |
ISBN-13: |
978-1-249-45103-7 |
Categories: |
Books >
Social sciences >
Education >
General
Promotions
|
LSN: |
1-249-45103-5 |
Barcode: |
9781249451037 |
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