The Impact of Detonation Initiation Techniques on Thrust in a Pulse Detonation Engine

2006 ◽  
Author(s):  
John Hoke ◽  
Royce Bradley ◽  
Jason Gallia ◽  
Frederick Schauer
Keyword(s):  
Detonation Initiation ◽  
Pulse Detonation Engine ◽  
Pulse Detonation ◽  
Detonation Engine ◽  
The Impact

scholarly journals Experimental Studies on Detonation Initiation of Liquid-Fuel-Air Mixture in a Pulse Detonation Engine with Initiator

2004 ◽  
Vol 52 (611) ◽  
pp. 549-555
Author(s):  
Tomoaki Yatsufusa ◽  
Masahiro Ohira ◽  
Shin’ichi Yamamoto ◽  
Kazuhiro Nishimura ◽  
Koichi Yoshinaga ◽  
...  
Keyword(s):  
Liquid Fuel ◽  
Experimental Studies ◽  
Detonation Initiation ◽  
Pulse Detonation Engine ◽  
Pulse Detonation ◽  
Detonation Engine

scholarly journals Evaluation of critical blockage ratio and pulse length in a pulse detonation engine using CFD and MATLAB

2018 ◽  
Vol 172 ◽  
pp. 02006 ◽  
Author(s):  
S. Srikrishnan ◽  
P. K. Dash ◽  
V. Jayakumar
Keyword(s):  
Pulse Length ◽  
Pressure Rise ◽  
Detonation Initiation ◽  
Tube Length ◽  
Pulse Detonation Engine ◽  
Detonation Pressure ◽  
Time Duration ◽  
Pulse Detonation ◽  
Wide Range ◽  
Detonation Engine

A Pulse Detonation Engine (PDE) is a new invented propulsion device that takes advantage of the pressure rise inherent to the efficient burning of fuel-air mixtures via detonations. Detonation initiation is a critical process that occurs in the cycle of a PDE. A practical method of detonation initiation is Deflagration-to-Detonation Transition (DDT), which describes the acceleration of a subsonic deflagration created using low initiation energies to a supersonic detonation. The DDT process is not well understood due to a wide range of time and length scales involving complex chemistry, turbulence and unsteady pressure waves. This paper discuss about the effects of blocking ratio in the augmentation of detonation pressure and velocity inside a cylindrical tube of diameter 0.0254m and a length of 1 m. The blockages are rectangular in shape placed at 2/3rd distances of the length of the tube and the heights of the blockages are varied in terms of the diameter of the tube as 1/4th, 1/3rd, ½, 2/3rd and 3/4th the diameter of the tube. The setup is then analyzed in MATLAB using the physics of Friedlander’s equation, which formulate the decay time duration of pressure across the tube length, with and without the blockage. Further, a 2D CFD analysis through ANSYS Workbench is conducted which gave the effective blocking ratio in a rectangular type of blockage placed at the 2/3rd position of the length of the tube and the results are compared. For variable pressures ranging from 1 MPa to 100 MPa input, the effective pulse length is around 0.25 seconds after which the decay of pressure and temperature attain the critical limit. Also it is found that the maximum feasible velocity occurs for an inlet pressure of 10 MPa and 2/3rd height of the blockage where the corresponding outlet velocity is 4692m/s and outlet total pressure being 10.542 MPa.

Ignition method effect on detonation initiation characteristics in a pulse detonation engine

2016 ◽  
Vol 93 ◽  
pp. 1-7 ◽  
Author(s):  
Zhiwu Wang ◽  
Yang Zhang ◽  
Jingjing Huang ◽  
Zijian Liang ◽  
Longxi Zheng ◽  
...  
Keyword(s):  
Detonation Initiation ◽  
Pulse Detonation Engine ◽  
Pulse Detonation ◽  
Method Effect ◽  
Detonation Engine

scholarly journals Study on Influence of Diameter on Detonation Acoustic Characteristics of Pulse Detonation Engine

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Gui-yang Xu ◽  
Chun-guang Wang ◽  
Yan-fang Zhu ◽  
Hong-yan Li ◽  
Lun-kun Gong ◽  
...  
Keyword(s):  
Acoustic Characteristic ◽  
Pulse Detonation Engine ◽  
Acoustic Characteristics ◽  
Experiment System ◽  
Pulse Detonation ◽  
Impact Noise ◽  
Maximum Duration ◽  
Detonation Engine ◽  
Set Up ◽  
Different Diameters

AbstractThe experiment system of pulse detonation engine is set up to investigate on influence of diameter on detonation acoustic characteristic. The research of detonation acoustic characteristic of pulse detonation engine for four different diameters in different angles is carried out. Results from the test show that as the PDE diameter increasing, there are increases in amplitudes of impact noise in all angles, and the growth rate of amplitude of impact noise in the 90° direction is generally greater than that in the 0° direction. The smaller PDE diameter is, the distance of most obvious directivity at 0° turning to most obvious directivity at 30° is shorter. When the distance is shorter, such as 200 mm, the duration of detonation acoustic is increasing with the increase of PDE diameter, however, when the distance is longer, such as 3000 mm, it is just the opposite. The maximum duration of detonation acoustic is appeared in 3000 mm under 30 mm PDE diameter which reaches to 1.44 ms.

An analytical model for the impulse of a single-cycle pulse detonation engine

2001 ◽  
Author(s):  
E. Wintenberger ◽  
J. Austin ◽  
M. Cooper ◽  
S. Jackson ◽  
J. Shepherd
Keyword(s):  
Analytical Model ◽  
Pulse Detonation Engine ◽  
Single Cycle ◽  
Pulse Detonation ◽  
Detonation Engine ◽  
Cycle Pulse
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